Difference between revisions of "PREX2RunPlan2019"

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[[Main_Page|<B>CREX Main</B>]] << [[Main_Page_PREXII|PREX II Main]]
  
== '''This is a Draft being updated from previous run plans.  Please ignore until further notice''' ==
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== PREX Run Plan for &nbsp; Commissioning &nbsp; and &nbsp; Auxiliary Measurements ==
<font color="magenta">This was for the 2010 PREX-I run. </font> &nbsp; A run plan for PREX-II and C-REX is forthcoming.
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See also the [[RunPlanDaily| Daily Run Plan]] and [[Run plan history| Earlier Daily Run Plan]] and  [[PREX2AuxiliaryMeasurements| Auxiliary Measurements ]]
  
 +
[[PREX_I_Run_Plans | PREX I - 2010 Run Plan]]
  
== PREX Run Plan for &nbsp; Commissioning &nbsp; and &nbsp; Auxiliary Measurements ==
 
 
See also the [[RunPlanDaily| Daily Run Plan]] and [[PreviousRunPlanDaily| Earlier Daily Run Plan]]
 
  
 
The experiment is approved for 35 PAC days including 25 production days. There are 49 days on our calendar.<br><br>
 
The experiment is approved for 35 PAC days including 25 production days. There are 49 days on our calendar.<br><br>
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Below is a list of tasks in the approximate time order, with person(s) responsible, approximate amount of time required, and comments about the conditions or needs.  The time will, in most cases, be broken up into manageable chunks.  For example, the GEM commissioning will occur in about 4 periods of time, each 4 hours, separated by at least one day.  After commissioning we go into a regular production mode; we will provide an updated document webpage for shift worker instructions.
 
Below is a list of tasks in the approximate time order, with person(s) responsible, approximate amount of time required, and comments about the conditions or needs.  The time will, in most cases, be broken up into manageable chunks.  For example, the GEM commissioning will occur in about 4 periods of time, each 4 hours, separated by at least one day.  After commissioning we go into a regular production mode; we will provide an updated document webpage for shift worker instructions.
  
 
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<font color="red"> Total time: ? </font> &nbsp; Based on this list, each day we will come up with an adjustment to the [[RunPlanDaily| Daily Run Plan]].  Some flexibility will be needed to accomodate problems and changes in plans.
  
 
== Beam Restoration ==
 
== Beam Restoration ==
# <font color="blue">Basic beam setup</font>: Yves Roblin,
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# <font color="blue">Basic beam setup</font> <span style="background-color:#F1C40F">1 shift</span>: Yves Roblin
#* beam transport to dump
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#* establish tune beam and low current CW beam in the hall.
#* beam transport through Compton chicane
+
## Establish beam to dump, through Compton chicane
#* initial ion chamber calibration for beam interception (on ladder); tune beam->CG
+
## Design match to hall expected as part of original configuration, if additional beam time is required will be necessary to coordinate with optics/production runplan
# <font color="blue">Source and Parity Quality Beam</font>: Caryn Palatchi, Amali Premathilake, Kent Paschke
+
## ion chamber calibration will be skipped until we can get targets in (MASK ION CHAMBERS); <font color="red"> CG will coordinate</font>
#* Source laser optics configurations <font color="orange"> in progress </font>
+
# <font color="blue">Source and Parity Quality Beam</font>  <span style="background-color:#F1C40F">0 shift (complete before 6/17)</span>: Caryn Palatchi, Amali Premathilake, Kent Paschke
#* Wein studies  <font color="green"> done </font>
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## Source laser optics configuration and initial setpoints <font color="green"> done </font>
 +
## Wein left/ Wein Right injector optics configuration <font color="green"> done </font>
 +
## Characterize injector optics configuration <font color="green"> done </font>
  
  
== Low current checkout ==
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== Low Current Commissioning ==
# <font color="blue">Basic beam setup</font>:
+
* Basic beamline commissioning  (may be 3 shifts total)
## MCC
+
**Establish low-current beam with spectrometer magnets on. Establish centering on collimator. BPM offset calibration. Commission target ladders.
### beam transport through Compton chicane @5uA (Yves Roblin, rates in finger scintillators)
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**Preparations:
### spot size at target (harps)
+
*** Stripchart on ion chambers, with bpm4e and bpm4a positions
### turn on septum and very still on dump (viewer available?!); clean transport to dump
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*** stripchart on collimator and beamline temps with bpm 4a and 4e positions
## Hall
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*** stripchart on compton rates (with beam current) <span style="color:red">no more 2x what is present in [https://logbooks.jlab.org/entry/3687977 HACOMPTONLOG]</span>
### harp scans for BPM calibrations and raster check
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#<font color="blue">Verify Beamline setup </font> <span style="background-color:#F1C40F">1 shift</span> Yves Roblin, Bob
### Bullseye scan and first check of SAMs (collimator effect?!)
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#* Tune mode. No target. Raster off. Ion chambers masked.  <span style="color:red">[http://opsweb.acc.jlab.org/CSUEApps/atlis/atlis.php?load=Task&task_id=19326 ATLis 19326]</span>
### low current beam monitoring (cavities) --> maybe this will be xchecked with HRS rates
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##beam transport through Compton chicane up to 5uA CW.
# <font color="blue">Warm target position:</font>:
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##* Rates in finger scintillators <span style="color:red">no more 2x what is present in [https://logbooks.jlab.org/entry/3687977 HACOMPTONLOG]</span>
## use spot++ to find carbon hole
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##* ComptonUS1 ~ 30 Hz, ComptonDSbg1  ~ 870 Hz, ComptonDCbg2 ~ 1010 Hz
# <font color="blue">Cold target position:</font>:
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##spot size at target (harps)  (nominal spec is 150 um x 150 um.  Larger is better)  
## use spot++ to find carbon hole
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##* Use 5uA CW, but keep eye on compton rate, ion chambers, temps.)
# <font color="blue">Collimator checkout</font>:
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##Tune beam. Turn on septum and verify still on dump. Clean transport to dump for PREX set points
## check rates with SAMs
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##1 arm running (Q1 on) test to verify no beam motion.
## moderate CW and thick C/Ta target so we can check temps (need a simulation for collimator power for C/Ta target)
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##Turn on both Q1 spectrometers.
# <font color="blue">Septum + Q1 checkout</font>:  
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# <font color="blue">Hall bullseye scan</font> <span style="background-color:#F1C40F">0.5 shift</span> Bob
## clean transport to dump for PREX set points
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#* harp scans at each of 5 points around nominal center, (0,0), (2,2), (2,-2), (-2,-2), (-2,2).
## 1 arm running (Q1 on) test to see beam motion (Yves and Ciprian)
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## Set prescale for high rate of clock triggers
 +
## Watch beam on viewer, ion chamber and temperature stripcharts.
 +
## use 2-5uA CW to find each corner position. 4A, 4E harp scan for one of the corner positions and verify EPICS readback of BPMs, check spectrometer BPM calibrations.
 +
### If PREX expert is available, parasitically collect data for low current beam monitoring (cavities). If during day have RC inform J Musson before taking this data.
 +
# <font color="blue"> Collimator checkout </font> <span style="background-color:#F1C40F">0.5 shift</span> Yves, Ciprian G, Kent P
 +
#*will verify that we are cleanly going through the collimator and cross check power deposition calculations
 +
## Target ion chamber setpoints can be set high to allow this test.
 +
## setup ion chamber strip chart
 +
## Establish  2-5uA tune mode, with empty target. Use 4x4 raster.
 +
## move beam in 2mm steps as much as +/- 1 cm in both horizontal and vertical. Watch for rise the ion chamber signal. Record positions where edges of the collimator bore are found.
 +
## set beam to center on colllimator based on those edges.
 +
## compare to position of carbon hole on warm and cold ladders.  Do we need to recheck target frames for targets? Do we need to change encoder positions?
 +
# <font color="blue"> Warm target position </font><span style="background-color:#F1C40F">0.25 shift</span> Kent (Silviu, present or on call?)
 +
#* Verify target alignment.
 +
## insert warm ladder, carbon hole.
 +
## Set raster for 8mmx8mm
 +
## establish 2uA CW. Run spot++ to find carbon hole.  log it.
 +
## Adjust raster setting to establish 4x5 raster size. Log it.
 +
## if carbon hole not in 4x4 raster view, need to reconsider. (move beam, or use off center?)
 +
# <font color="blue">Cold target position </font> <span style="background-color:#F1C40F">0.25 shift</span> Kent (Silviu, present or on call?)
 +
#*Verify target alignment.
 +
#* target and dump ion chamber set points will need to be raised to perform this commissioning
 +
## insert warm ladder, carbon hole.
 +
## Set raster nominal 8x8 (or what could be used.)
 +
## establish 5uA CW. Run spot++ to find carbon hole.  Log it.
 +
## Set raster to 4x5 set point from before. Use spot++ to verify it.
 +
## if carbon hole not in 4x5 raster view, need to reconsider. (move beam, or use off center?)
 +
## Move to lead-208 target, location #1(?)
 +
## establish 5uA CW, 4x5 raster. Run spot++ to verify raster size, not hitting edges. Log it.
 +
# <font color="blue">Ion Chamber calibration - thick Target </font> <span style="background-color:#F1C40F">0.25 shift</span> Ciprian G
 +
#* Procedure discussed with Eric Forman: thick target calibration procedure (ramp 2-10uA) for ALL ion chambers (including the dump)
 +
#* Must keep rates in compton finger scintillators; <span style="color:red">no more 2x what is present in [https://logbooks.jlab.org/entry/3687977
 +
## Establish beam, 5uA beam, 4x4 raster, on lead target. 
 +
## move beam to x=+1mm (relative to collimator center)
 +
## target and dump ion chamber setpoints can be set high this configuration
 +
## Execute thick target Ion Chamber calibration, From Atlis 19326. This calibration will be used to set ion chamber setpoints.
 +
### Dump and Near-target ICs: set for 45 degree targets by projecting ion chamber setpoints for 20uA  current or 90 degree targets by projecting to 70uA current.
 +
#* parasitic: first check of SAMs at low current (call Devi? or Dustin? before starting)
 +
# <font color="blue"> Very low current commissioning </font><span style="background-color:#F1C40F">0.25 shift</span>  Yves. Ye Tian. Caryn.
 +
#* commission low current cavities relative to stripline calibration. Commission cavity bpm lock.
 +
#* Note: position scan and lock setup are separate pieces, can happen at different times.
 +
#* Either/ both can happen later (during optics running). Needed before sieve-out Q2 studies.
 +
## Cavity lock 
 +
##* [Yves is required for step]
 +
###setup cavity stripchart. Establish 2uA CW.
 +
### setup cavity slow lock.  Verify that in operation this lock holds the position in the cavity epics readback.
 +
### lower current to 100 nA.  Verify that the lock still holds the cavity epics readback.
 +
## Cavity Position scan.
 +
###setup cavity stripchart. Establish 1uA CW.
 +
### Find corrector positions for +/-2mm in X, Y.
 +
### Reduce current to 50nA.
 +
### set to each corrector position, verify position measurements with epics readback
 +
####Turn on both parity DAQ and counting DAQs. For the counting DAQ, the trigger is set to T1=1,  and make sure that S0 HV is on.
 +
##### For changing the trigger prescale factor: for the LHRS, please go to adaq@adaq3, type prescaleL, and you will see a gui, and set T1=1 and press the save button and exit it.
 +
##### For the RHRS, please go to the adaq@adaq2, typle prescaleR, and you will see the same gui, just set T1=1 too and press the save button and exit it.
 +
####Start/and stop the parity DAQ and counting DAQs at same time for the each position point.
 +
####Look at the strip chart of IPM1H04BX, IPM1H04CX, IPM1H04DX and IPM1H04BY, IPM1H04CY,  (current signal) IPM1H04DY, IPM1H04B, IPM1H04C, IPM1H04D, if the signal is saturate or too small to present. Then we need to change the gain of the cavity BPMs
 +
#####Change the gain, please call Ye Tian (803-553-3570)
 +
 
 +
== Beam Monitor calibration ==
 +
# Establish 50 uA in hall
 +
# Run current scan, local around 50uA, using Unser to calibrate beam charge monitor readout in parity DAQ. 
 +
##Run the Compton DAQ concurrently, for calibration
 +
## Go to FixedGain when at 50 uA on bpms (list of crates???) and repeat local current scan to set bpm pedestals.
  
 
== Spectrometer Commissioning ==
 
== Spectrometer Commissioning ==
# <font color="blue">tracking checkout - Tune B configuration</font>: Bob M, Ryan R
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[https://prex.jlab.org/DocDB/0003/000378/004/opticsplan_jun19.pdf <font color="magenta">'''Detailed Optics Plan'''</font>]  <font color="red">'''Name and time assignments needs to be worked out by optics crew'''</font>
#* Sieve IN: initial checkout
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# <font color="blue"> Tracking checkout </font> <span style="background-color:#F1C40F">1 shift</span>: Bob M, Ryan R, Chandan G
#** put in C/Ta target; check rates with scalars
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## Sieve In, raster off. Tune B. 45 deg C target. 1 uA.
#** VDC + GEM checkout; look at tracks, VDC spectra; (GEM):noise, pulse-heights, tracks
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## Septum 377 A
#** Sieve reconstruction verification
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## Check rates with scalars.
# <font color="blue">Tune septum and HRS magnets - Sieve IN</font>:
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## Set prescales for S0 triggers.
#* tune septum for the central ray (quad scans)
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## VDC checkout; look at tracks, VDC spectra
#* inner edge verification
+
## Some short run for GEM: noise, pulse-heights, tracks, etc. After this GEMS out of DAQ to improve efficiency.
#* Q1 acceptance scan
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# <font color="blue">Sieve reconstruction verification </font> <span style="background-color:#F1C40F">0.25 shift</span>:Seamus or Bob, Ryan
# <font color="blue">Small spot at quartz: Sieve OUT</font>:  
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## Sieve In, raster off. Tune B. 45 deg C target. 1 uA.
#* modify tune to get small spot at quartz (with raster on)
+
## Septum 377 A
# <font color="blue">Optics calibration data - Sieve IN</font>:
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## 500k events
#* spectrometer momentum scan
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# <font color="blue">Tune septum to central ray </font> <span style="background-color:#F1C40F">1 shift</span>: Seamus, Ryan
# <font color="blue">Water cell pointing</font>:
+
## Sieve In, raster off. Tune B. 45 deg C target. 1 uA.  
#* Sieve IN: pointing measurement
+
## Beam centered on axis
# <font color="blue">Quartz detector checkout</font>: Dustin M,  
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## Start septum at 377 A
#* thin C, low current, no raster, Sieve OUT:  positions [[Media:quartzAlignmentRunPlan.pdf|pdf]]
+
## 500k events per run
#* PMT spectra
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## Adjust Q1 fields by 10% low (one run) and high (one run)
#* rates
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### Identify the invariant position in the phitarg-thetaTarg space and adjust septum to move the central ray to expected location
#* stub check?!
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## Repeat 10% low (one run) and high (one run) to verify central hole in correct location
 
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## Verify for Q2 and Q3 that central hole does not move under field changes (1 run each, 10% low). (optional)
== High current checkout ==
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##* Expected: the hole will be invariant under all quad changes. This location is about 2mm toward beam from central hole.
# <font color="blue">Basic setup</font>:
+
## Last step: CYCLE QUADS to get back to precise Tune B optics
#* Ion chamber calibration (near target)
+
# <font color="blue">Inner Edge Identification</font> <span style="background-color:#F1C40F">0.5 shift</span>: Seamus, Ryan
#* high current setup through Compton
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## Sieve In, raster off. Tune B. 45 deg C target. 1 uA.
# <font color="blue">Beamline instrumentation</font>
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## Beam centered on axis
#* Current ramp for BPM/BCM calibrations
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## Start septum at central tune
#* FC2 check of UNSER?!
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## 500 k events per run
# <font color="blue">MOLLER polarimeter</font>: Simona Malace, Sanghwa Park
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## Take 9 points over septum current from +10% to -10%
#* Solenoid alignment
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### The expected inner edge of the acceptance should match simulation
#* Spin dance
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### If there is a small-angle obstruction for currents at or above the central tune current, identify the lower septum current where there is no inner obstruction for both arms. Use this as new production septum current.
# <font color="blue">Hall PQB</font>:  
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## Last step: Cycle Septum
#* Check asymmetries in the hall
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# <font color="blue">Q1 acceptance scan</font> <span style="background-color:#F1C40F">0.25 shift</span>:Ye T
#* Adiabatic dampening
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## Sieve In, raster off. Tune B. 45 deg C target. 1 uA.
#** Use helicity magnets to tune phase trombone
+
## Beam centered on axis
#* Establish feedback
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## Optics at central tune
# <font color="blue">Beam modulation</font>:
+
## 500 k events per run
#* turn on and set amplitudes
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## Take a run for Q1 filed +/-10% over 5 points (cycle, then scan top to bottom)
#* test orthogonality
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##* Expected: later analysis should show out of place acceptance compares to simulation.
# <font color="blue">Detector checkout</font>:
+
# <font color="blue">Quartz spot width minimization</font>  <span style="background-color:#F1C40F">0.5 shift</span>: Ryan, Seamus? Bob?
#* SAM commissioning
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## Sieve IN (If this is last step of optics configuration, take an access to pull sieve OUT)
#* stud test
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## raster ON (4x6 raster)  
#* width check
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## Start with central tune
#* raster sync
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## 45 deg C target. 1 uA.  
# <font color="blue">Production</font>: (1 day)
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## Beam centered on axis
#*
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## Optics at central tune
# <font color="blue">AT measurement</font>: # AT measurement
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## 500 k events per run
#*
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## Take a run along eigenvector quads +/-10% for Q1 filed +/-10% over 5 points (cycle, then scan top to bottom)
 
+
##* Expected: width should be minimized
 
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##* Tune that minimizes width at detectors is new central tune.  
 
+
# <font color="blue">Quartz detector checkout</font> <span style="background-color:#F1C40F">1 shift</span>: Dustin M, Devi A., VDC expert
 
+
## Sieve OUT
== Beam Restoration ==
+
## raster ON (4x6 raster)
 
+
## Start with central tune
<UL>
+
## thin C target. 0.5uA - 1 uA (want quartz scaler rates below 1MHz but need beam position monitoring)
<LI> <font color="blue">Basic Beam Setup</font> -- <font color="green">1 shift</font> &nbsp; Yves Roblin, Bteam <br>
+
## Beam centered on axis
<UL>
+
## Optics at (new) central tune
<LI> Establish beam to dump, through compton chicane, spot size at target.
+
## verify small spot at quartz (thin C, low current, sieve out, raster on?)
<LI> Design match to hall expected as part of original configuration, if additional beam time is required will be necessary to coordinate with optics/production runplan
+
## thin C, low current, raster on, Sieve OUT:  positions [[Media:quartzAlignmentRunPlan.pdf|<font color="magenta">Plan</font>]]
</UL>
+
## PMT spectra: Examine pulse height distributions to get RMS/mean and PEyields
<LI> <font color="blue">Source and Parity Quality Beam</font> -- <font color="green"> essentially done </font> &nbsp; Caryn Palatchi, Amali Premathilake, Kent Paschke<br>
+
## rates:  These will come from scalers.  We can't do a rate "check" without going to integrate mode.  This will be done during Width study
<UL>
+
# <font color="blue">Optics calibration data </font> <span style="background-color:#F1C40F">0.5 shift</span> Nilanga, Siyu
<LI> Wein left/ Wein Right injector optics configuration
+
## Sieve In, raster off. Tune B. 1 uA.
<LI> Source laser optics configuration and initial setpoints
+
## 45deg Tungsten target
</UL>
+
## Beam centered on axis
</UL>
+
## Optics at central tune
 
+
## 500 k events per run
== Low Current Checkout ==
+
## spectrometer momentum scan (details in run plan still)
 
+
# <font color="blue">Water cell pointing </font> <span style="background-color:#F1C40F">1 shift</span> Nilanga, Siyu
<UL>
+
## Sieve IN: pointing measurement
<LI> Raster check
+
## Sieve OUT: pointing measurement
  <UL>
+
## (details in run plan still)
  <LI> Verify raster size with harp scans
+
# <font color="blue">Y target reconstruction on warm and cold ladders</font>
  </UL>
+
## Raster off. 
<LI> <font color="red">Septum checkout (Sieve IN)</font> -- <font color="green">0.5 shift</font>
+
## 45 deg carbon
  <UL>
+
## 90 deg carbon
  <LI> Verify septum does not steer beam (clean beam to dump with energized septum)
+
# <font color="blue">Q2 measurement</font> <span style="background-color:#F1C40F">0.5 shift</span>:
  </UL>
+
## Production target
<LI> <font color="red">Target Alignment Check (Sieve IN)</font> -- <font color="green">0.5 shift</font>
+
# <font color="blue">Quartz detector rate estimate</font> <span style="background-color:#F1C40F">0.5 shift</span> KK, Dustin, Devi, Tao
  <UL>
+
## controlled access to change UpStream quartz detector (in each arm) to integrating mode
  <LI> Check spot with Carbon hole, lumi detectors and/or detector rates
+
## draft [[Media:RateStudyPlan_phaseI.pdf|<font color="magenta">plan</font>]]
  <LI> Put in Ta or ultra-thin C12 target  
+
# <font color="blue"> Position At detectors </font>: Dustin, Ryan
  <LI> Scan few mm up-down, left-right, verify from rates we're not hitting a frame.
+
  </UL>
+
<LI> <font color="red"> Beam line alignment check </font> (Bullseye scan) -- <font color="green">0.5 shift</font>
+
</UL>
+
 
+
 
+
== Spectrometer commissioning and Optics calibration  ==
+
 
+
<UL>
+
<LI> Establish low current (1-2 uA) beam, verify beam monitoring.  
+
<UL>
+
<LI> Verify beam monitoring in BCM, striplines
+
<LI> Verify beam monitoring in low-current cavity triplets
+
</UL>
+
<LI> <font color="blue">VDC Checkout</font> -- &nbsp; Dustin McNulty, Bob Michaels
+
<UL>
+
<LI> put in C or Ta target. Look for sieve holes; first check on optics
+
</UL>
+
<LI> <font color="blue">Quartz detectors checkout</font> -- &nbsp; Dustin McNulty
+
<UL>
+
<LI> Calibrate detector x-y movers in VDC coordinates
+
</UL>
+
<LI> <font color="blue">GEM checkout</font> -- &nbsp;  Nilanga Liyanage
+
<UL>
+
<LI> First look at noise, pulse-heights, tracks
+
</UL>
+
</UL>
+
<LI> <font color="red">Spectrometer checkout (Sieve OUT)</font> -- <font color="green">1 shift</font>
+
 
+
<UL>
+
<LI> <font color="green">Low-current cavities (Priority activity)</font> -- &nbsp; John Musson
+
<UL>
+
<LI> Need before subsequent program, especially Optics and Q<sup>2</sup>
+
</UL>
+
 
+
<LI> <font color="blue">VDC Checkout</font> -- &nbsp; Dustin McNulty, Bob Michaels
+
<UL>
+
<LI> First spectra on specific thin targets
+
<LI> Learn to measure rates to 10% and study rate dependence effects
+
</UL>
+
 
+
<LI> <font color="blue">Quartz detectors checkout</font> -- &nbsp; Dustin McNulty
+
<UL>
+
<LI> Detector pulse height spectra
+
<LI> If possible, compare 6 and 10 mm blocks
+
<LI> Map shadow of quartz (both primary and A_T hole) in VDCs
+
</UL>
+
<LI> <font color="blue">GEM checkout</font> -- &nbsp;  Nilanga Liyanage
+
<UL>
+
<LI> First attempt at GEM commissioning
+
<LI> Identify Quartz detector shadows in GEM & VDC coordinates
+
</UL>
+
 
+
</UL>
+
<LI> <font color="red">A_T hole characterization</font> -- <font color="green">1 shift</font>
+
<UL>
+
<LI> <font color="green"> Determine placement of A_T detectors (Priority activity)</font> -- &nbsp; Bob Michaels, Dustin McNulty
+
<UL>
+
<LI> Characterize acceptance on thin targets with A_T hole blocked & unblocked
+
<LI> Two or three accesses to block and unblock A_T hole
+
</UL>
+
<LI> <font color="blue">Parasitic GEM/Detector studies</font> -- &nbsp; GEM & Detector teams
+
<UL>
+
<LI> Accumulate statistics on detector pulse height
+
<LI> Learn to measure rates to 10% with GEMs
+
<LI> A_T hole alignment
+
<LI> Place A_T hole detector such that rate is ~ 100 times less than main detector (with thick target)
+
</UL>
+
 
+
</UL>
+
<LI> <font color="red">Water Cell & Optics</font> -- <font color="green">2 shifts</font>
+
<UL>
+
<LI> <font color="green"> Absolute angle measurement (Priority activity)</font> -- &nbsp; Nilanga et al
+
<UL>
+
<LI> Sieve Slit runs
+
<LI> Angle calibration
+
</UL>
+
 
+
</UL>
+
 
+
</UL>
+
 
+
== Lead Target Checkout (1-2 calendar days) ==
+
<UL>
+
<LI> <font color="red">High Current Commissioning</font> -- <font color="green">1 shift</font>
+
 
+
<UL>
+
<LI> <font color="green">Production target checkout (Priority activity)</font> -- &nbsp; Bob Michaels et al
+
<UL>
+
<LI> 100 uA on thick Lead, monitor radiation levels, establish luminosity limits
+
</UL>
+
<LI> <font color="blue">Electronics commissioning</font> -- &nbsp; KK,  et al
+
<UL>
+
<LI> Establish LUMI performance characteristics
+
<LI> Detailed measurements of various oversampling configurations
+
</UL>
+
 
+
</UL>
+
<LI> <font color="red">Parity Commissioning</font> -- <font color="green">1 shift</font>
+
 
+
<UL>
+
<LI> <font color="green">Parity Quality (Priority activity)</font> -- &nbsp; Kent,  et al
+
<UL>
+
<LI> IA feedback, beam modulation ( low current modulation - dithering commissioning before CW )
+
<LI> Evaluate SAM regression performance
+
</UL>
+
<LI> <font color="blue">Beam monitor calibrations</font> -- &nbsp;
+
<UL>
+
<LI> Bulls-eye scan, fixed gain BPM calibration, BCM calibration
+
</UL>
+
 
+
</UL>
+
<LI> <font color="red">Q<sup>2</sup> Measurement</font> -- <font color="green">1 shift</font>
+
 
+
<UL>
+
<LI> <font color="green">Establish Q<sup>2</sup> measurement sequence (Priority activity)</font> -- &nbsp; Dustin, Nilanga et al
+
<UL>
+
<LI> Drift chamber rate measurement at a few nA
+
<LI> parasitic GEM commissioning
+
<LI> try to establish a rate in GEMs, especially in quartz shadow, at 10-100 nA
+
</UL>
+
<LI> <font color="blue">ARC energy measurement </font> -- &nbsp;
+
  
</UL>
+
== High current checkout ==
<LI> <font color="red">High Luminosity Detector Commissioning</font> -- <font color="green">1 shift</font>
+
[[detailed High current plan|detailed plan]]
 +
# <font color="blue">Basic setup</font> <span style="background-color:#F1C40F">0.5 shift</span> Yves R, Ciprian G:
 +
#* No target.
 +
#* 50uA beam current, through Compton (backgrounds on fingers and Compton photon detector).
 +
# <font color="blue">High current with target</font> <span style="background-color:#F1C40F">0.5 shift</span> Ciprian G, Dustin M:
 +
## Establish 4x4 raster. Insert lead target.
 +
## Detector and SAM voltages (Dustin M)
 +
# <font color="blue">Beamline instrumentation calibration</font> <span style="background-color:#F1C40F">0.5 shift</span> Caryn P,
 +
## Current ramp for BPM/BCM calibrations and detector pedestals [[detailed Calibration plan|detailed plan]]
 +
# <font color="blue"> Initial production condition test</font>  <span style="background-color:#F1C40F">0.25 shift</span> Caryn P, [[detailed Production plan|detailed plan]]
 +
## detector and SAM widths
 +
## regression sensitivities
 +
## beam noise and asymmetry check
 +
## collimator water and thermocouple temperatures,
 +
## radiation monitors and ion chamber stability
 +
# <font color="blue"> Width studies  </font>  <span style="background-color:#F1C40F">0.5 shift</span> KK,
 +
## detector and SAM widths, targets, shutters, etc
 +
## deinstall shutters at conclusion of test
  
<UL>
+
== Establish Production Conditions ==
<LI> <font color="green">Characterization of Integrating Detector response (Priority activity)</font> -- &nbsp; KK, Dustin et al
+
# <font color="blue">Beam modulation</font> <span style="background-color:#F1C40F">0.5 shift</span>Victoria O., Ye T,:  (<font color="red">Detectors needed for BeamMod commissioning</font>)
<UL>
+
## turn on
<LI> Estimate detector rates & impact of A_T hole flux
+
### In integrating mode
<LI> Evaluate primary detector and LUMI noise peformance
+
###check HV of Main Detector
<LI> Evaluate BPM performance; compare strip-line regression to cavity regression
+
###Lumis on
<LI> Establish empirical figure of merit for A_T hole detector
+
##set Amplitudes
</UL>
+
### start with .100 A set amplitude. Run (at least) 2 supercycles. Check online gui plots for response.
<LI> <font color="blue">Final parasitic GEM commissioning</font> -- &nbsp; Nilanga et al
+
### increase amplitudes by .50 A, to see response (if needed).
<UL>
+
## test orthogonality
<LI> Compare predicted and measured integrating width prediction at moderate current on thick target
+
### after minimum 2 good supercycles (more is better) ready to examine sensitivities
</UL>
+
### if orthogonality is bad, need additional time to discuss with experts about retuning beam.
</UL>
+
##turn off
</UL>
+
###restore conditions for Moller commissioning
 +
# <font color="blue">Detector checkout</font> <span style="background-color:#F1C40F">1 shift</span> Dustin M:
 +
## quartz detector position: verify no inelastic event acceptance (<font color="red">plan needed</font>)
 +
## width study  (<font color="red">plan needed</font>)
 +
## raster sync  (<font color="red">plan needed</font>)
 +
# <font color="blue">Spin Dance</font> <span style="background-color:#F1C40F">1 shift</span>: Simona Malace, Sanghwa Park
 +
## Moller polarimeter commissioning (establish beam)  (<font color="red">plan needed</font>)
 +
## Short spin dance (run plan needed, established optimal spin angle for this Wien state)  (<font color="red">plan needed</font>)
 +
# <font color="blue">Hall PQB</font> <span style="background-color:#F1C40F">1 shift</span> Caryn P,:
 +
## Check asymmetries in the hall 
 +
## Adiabatic dampening / Matching  (<font color="red">plan needed</font>) 
 +
### Use helicity magnets to tune phase trombone
 +
## Establish feedback (if Hall C is not on schedule their feedback for later)
 +
# <font color="blue">Production</font>: <span style="background-color:#F1C40F">0.5-3 shift?</span> All
 +
##
 +
# <font color="blue">AT measurement</font>: <span style="background-color:#F1C40F">1.5 shift?</span> All (<font color="red">plan needed</font>)
 +
## Do we need to verify zero longitudinal using Moller polarimeter?
 +
## Carbon
 +
## Lead
 +
## Calcium
 +
# <font color="blue">Initial Moller commissioning</font> <span style="background-color:#F1C40F">1 shift</span> Simona M, Sanghwa P,
 +
## minimal set for first absolute measurements
 +
# <font color="blue">Initial Compton commissioning</font> <span style="background-color:#F1C40F">1 shift</span> Dave G, Juan Carlos C,
 +
## minimal set for  measurement conditions
  
== Polarimetry Beam Checkout (1 shift) ==
+
== <font color="magenta"> '''Start Production''' </font> ==
<UL>
+
<LI> <font color="red">Moller Beam Checkout</font> -- <font color="green">2 shifts</font>
+
  
<UL>
 
<LI> <font color="green">Moller magnet alignment (Priority activity)</font> -- &nbsp; Moller team
 
<UL>
 
<LI> Verify Moller magnet does not steer beam
 
</UL>
 
<LI> <font color="blue">Parasitic Compton Checkout</font> -- &nbsp; Compton team
 
<UL>
 
<LI> Feedback to MCC on beam quality
 
<LI> Simultaneous performance on Moller tune, compton background and sufficient raster
 
</UL>
 
</UL>
 
</UL>
 
  
== Polarimetry Checkout (4-5 calendar days) ==
 
<UL>
 
<LI> <font color="blue">Compton Commissioning</font> -- <font color="green">8 shifts</font> &nbsp; Gaskell, et.al.
 
<UL>
 
<LI> Beam Tune, Background reduction -- Bteam,
 
<LI> Compton Cavity Checkout  --
 
<LI> Photon Detector Checkout -- CMU group
 
</UL>
 
<LI> <font color="blue">Moller Commissioning</font> -- <font color="green">8 shifts</font> &nbsp; Simona Malace, Don Jones, et.al.
 
<UL>
 
<LI> Magnet Alignment -- 1 shift (swing)
 
<LI> Raster size and pulse-mode -- 1 shift (day)
 
<LI> Target commissioning - 3 shifts
 
<LI> Pulse-mode target commissioning - 2 shifts
 
<LI> DAQ checkout -- 1 shift
 
</UL>
 
</UL>
 
== Establishing Production (2-3 calendar days) ==
 
<UL>
 
<LI> <font color="red">Production Checkout</font> -- <font color="green">2 shifts</font>
 
<UL>
 
<LI> Final detector alignment checks
 
<LI> Final LUMI/noise/helicity flip rate checks
 
<LI> Final beam modulation tweaks
 
<LI> Quick check for gross non-linearities
 
<LI> 4 hours longitudinal polarization production data
 
</UL>
 
  
<LI> <font color="red">Transverse Polarization</font> -- <font color="green">4 shifts</font>
+
== Important Activities After First Few Days  ==
<UL>
+
# <font color="blue">Linearity Studies</font> --  
<LI> <font color="green">Double-Wien Spin Manipulator Commissioning</font> -- &nbsp; Joe Grames
+
# <font color="blue">Background Studies</font> --
<LI> Spin dance
+
## Scans of Septum Magnet and HRS Dipole
<LI> 4 hours transverse vertical polarization production
+
## Thin Lead Target to check for inelastics at high-resolution
<LI> 2 shifts transverse horizontal polarization production
+
## Thin C12 to measure diamond background
</UL>
+
# Possible scan of Q1 to optimize acceptance and verify that collimator defines acceptance. (old idea, still relevant?)
 +
# We will start with the Wein in Spin-Right. Once we switch to Spin-Left we need to do another spin-dance.
  
</UL>
+
== Polarimetry Studies ==
 +
# <font color="blue">Compton Commissioning</font> --  &nbsp; Gaskell, et.al.
 +
## Beam Tune, Background reduction -- Bteam,
 +
## Compton Cavity Checkout  --
 +
## Photon Detector Checkout -- CMU group
 +
# <font color="blue">Moller Commissioning</font> -- Simona Malace, Don Jones, et.al.
 +
## Magnet Alignment -- 1 shift (swing)
 +
## Raster size and pulse-mode -- 1 shift (day)
 +
## Target commissioning - 3 shifts
 +
## Pulse-mode target commissioning - 2 shifts
 +
## DAQ checkout -- 1 shift
  
<font color="red"> Total time: approx 15 days !</font> &nbsp; Based on this list, each day we will come up with an adjustment to the [[RunPlanDaily| Daily Run Plan]].  Some flexibility will be needed to accomodate problems and changes in plans.
 
  
== Important Activities after few days of production ==
+
== Important Activities During run ==
<UL>
+
# <font color="blue">Linearity Studies</font> --  
<LI> <font color="blue">Linearity Studies</font> -- <font color="green">1 shift</font> &nbsp; Kent Paschke
+
# <font color="blue">Background Studies</font> --
<LI> <font color="blue">Background Studies</font> -- <font color="green">2 shifts</font>
+
# Repeat Q2 and pointing measurements
<UL>
+
# Arc Energy Measurement
<LI> Scans of Septum Magnet and HRS Dipole
+
<LI> Thin Lead Target to check for inelastics at high-resolution
+
<LI> Thin C12 to measure diamond background
+
</UL>
+
<LI> Possible scan of Q1 to optimize acceptance and verify that collimator defines acceptance.
+
</UL>
+

Latest revision as of 13:24, 19 October 2019


CREX Main << PREX II Main

PREX Run Plan for   Commissioning   and   Auxiliary Measurements

See also the Daily Run Plan and Earlier Daily Run Plan and Auxiliary Measurements

PREX I - 2010 Run Plan


The experiment is approved for 35 PAC days including 25 production days. There are 49 days on our calendar.

Below is a list of tasks in the approximate time order, with person(s) responsible, approximate amount of time required, and comments about the conditions or needs. The time will, in most cases, be broken up into manageable chunks. For example, the GEM commissioning will occur in about 4 periods of time, each 4 hours, separated by at least one day. After commissioning we go into a regular production mode; we will provide an updated document webpage for shift worker instructions.

Total time: ?   Based on this list, each day we will come up with an adjustment to the Daily Run Plan. Some flexibility will be needed to accomodate problems and changes in plans.

Beam Restoration

  1. Basic beam setup 1 shift: Yves Roblin
    • establish tune beam and low current CW beam in the hall.
    1. Establish beam to dump, through Compton chicane
    2. Design match to hall expected as part of original configuration, if additional beam time is required will be necessary to coordinate with optics/production runplan
    3. ion chamber calibration will be skipped until we can get targets in (MASK ION CHAMBERS); CG will coordinate
  2. Source and Parity Quality Beam 0 shift (complete before 6/17): Caryn Palatchi, Amali Premathilake, Kent Paschke
    1. Source laser optics configuration and initial setpoints done
    2. Wein left/ Wein Right injector optics configuration done
    3. Characterize injector optics configuration done


Low Current Commissioning

  • Basic beamline commissioning (may be 3 shifts total)
    • Establish low-current beam with spectrometer magnets on. Establish centering on collimator. BPM offset calibration. Commission target ladders.
    • Preparations:
      • Stripchart on ion chambers, with bpm4e and bpm4a positions
      • stripchart on collimator and beamline temps with bpm 4a and 4e positions
      • stripchart on compton rates (with beam current) no more 2x what is present in HACOMPTONLOG
  1. Verify Beamline setup 1 shift Yves Roblin, Bob
    • Tune mode. No target. Raster off. Ion chambers masked. ATLis 19326
    1. beam transport through Compton chicane up to 5uA CW.
      • Rates in finger scintillators no more 2x what is present in HACOMPTONLOG
      • ComptonUS1 ~ 30 Hz, ComptonDSbg1 ~ 870 Hz, ComptonDCbg2 ~ 1010 Hz
    2. spot size at target (harps) (nominal spec is 150 um x 150 um. Larger is better)
      • Use 5uA CW, but keep eye on compton rate, ion chambers, temps.)
    3. Tune beam. Turn on septum and verify still on dump. Clean transport to dump for PREX set points
    4. 1 arm running (Q1 on) test to verify no beam motion.
    5. Turn on both Q1 spectrometers.
  2. Hall bullseye scan 0.5 shift Bob
    • harp scans at each of 5 points around nominal center, (0,0), (2,2), (2,-2), (-2,-2), (-2,2).
    1. Set prescale for high rate of clock triggers
    2. Watch beam on viewer, ion chamber and temperature stripcharts.
    3. use 2-5uA CW to find each corner position. 4A, 4E harp scan for one of the corner positions and verify EPICS readback of BPMs, check spectrometer BPM calibrations.
      1. If PREX expert is available, parasitically collect data for low current beam monitoring (cavities). If during day have RC inform J Musson before taking this data.
  3. Collimator checkout 0.5 shift Yves, Ciprian G, Kent P
    • will verify that we are cleanly going through the collimator and cross check power deposition calculations
    1. Target ion chamber setpoints can be set high to allow this test.
    2. setup ion chamber strip chart
    3. Establish 2-5uA tune mode, with empty target. Use 4x4 raster.
    4. move beam in 2mm steps as much as +/- 1 cm in both horizontal and vertical. Watch for rise the ion chamber signal. Record positions where edges of the collimator bore are found.
    5. set beam to center on colllimator based on those edges.
    6. compare to position of carbon hole on warm and cold ladders. Do we need to recheck target frames for targets? Do we need to change encoder positions?
  4. Warm target position 0.25 shift Kent (Silviu, present or on call?)
    • Verify target alignment.
    1. insert warm ladder, carbon hole.
    2. Set raster for 8mmx8mm
    3. establish 2uA CW. Run spot++ to find carbon hole. log it.
    4. Adjust raster setting to establish 4x5 raster size. Log it.
    5. if carbon hole not in 4x4 raster view, need to reconsider. (move beam, or use off center?)
  5. Cold target position 0.25 shift Kent (Silviu, present or on call?)
    • Verify target alignment.
    • target and dump ion chamber set points will need to be raised to perform this commissioning
    1. insert warm ladder, carbon hole.
    2. Set raster nominal 8x8 (or what could be used.)
    3. establish 5uA CW. Run spot++ to find carbon hole. Log it.
    4. Set raster to 4x5 set point from before. Use spot++ to verify it.
    5. if carbon hole not in 4x5 raster view, need to reconsider. (move beam, or use off center?)
    6. Move to lead-208 target, location #1(?)
    7. establish 5uA CW, 4x5 raster. Run spot++ to verify raster size, not hitting edges. Log it.
  6. Ion Chamber calibration - thick Target 0.25 shift Ciprian G
    • Procedure discussed with Eric Forman: thick target calibration procedure (ramp 2-10uA) for ALL ion chambers (including the dump)
    • Must keep rates in compton finger scintillators; no more 2x what is present in [https://logbooks.jlab.org/entry/3687977
    1. Establish beam, 5uA beam, 4x4 raster, on lead target.
    2. move beam to x=+1mm (relative to collimator center)
    3. target and dump ion chamber setpoints can be set high this configuration
    4. Execute thick target Ion Chamber calibration, From Atlis 19326. This calibration will be used to set ion chamber setpoints.
      1. Dump and Near-target ICs: set for 45 degree targets by projecting ion chamber setpoints for 20uA current or 90 degree targets by projecting to 70uA current.
    • parasitic: first check of SAMs at low current (call Devi? or Dustin? before starting)
  7. Very low current commissioning 0.25 shift Yves. Ye Tian. Caryn.
    • commission low current cavities relative to stripline calibration. Commission cavity bpm lock.
    • Note: position scan and lock setup are separate pieces, can happen at different times.
    • Either/ both can happen later (during optics running). Needed before sieve-out Q2 studies.
    1. Cavity lock
      • [Yves is required for step]
      1. setup cavity stripchart. Establish 2uA CW.
      2. setup cavity slow lock. Verify that in operation this lock holds the position in the cavity epics readback.
      3. lower current to 100 nA. Verify that the lock still holds the cavity epics readback.
    2. Cavity Position scan.
      1. setup cavity stripchart. Establish 1uA CW.
      2. Find corrector positions for +/-2mm in X, Y.
      3. Reduce current to 50nA.
      4. set to each corrector position, verify position measurements with epics readback
        1. Turn on both parity DAQ and counting DAQs. For the counting DAQ, the trigger is set to T1=1, and make sure that S0 HV is on.
          1. For changing the trigger prescale factor: for the LHRS, please go to adaq@adaq3, type prescaleL, and you will see a gui, and set T1=1 and press the save button and exit it.
          2. For the RHRS, please go to the adaq@adaq2, typle prescaleR, and you will see the same gui, just set T1=1 too and press the save button and exit it.
        2. Start/and stop the parity DAQ and counting DAQs at same time for the each position point.
        3. Look at the strip chart of IPM1H04BX, IPM1H04CX, IPM1H04DX and IPM1H04BY, IPM1H04CY, (current signal) IPM1H04DY, IPM1H04B, IPM1H04C, IPM1H04D, if the signal is saturate or too small to present. Then we need to change the gain of the cavity BPMs
          1. Change the gain, please call Ye Tian (803-553-3570)

Beam Monitor calibration

  1. Establish 50 uA in hall
  2. Run current scan, local around 50uA, using Unser to calibrate beam charge monitor readout in parity DAQ.
    1. Run the Compton DAQ concurrently, for calibration
    2. Go to FixedGain when at 50 uA on bpms (list of crates???) and repeat local current scan to set bpm pedestals.

Spectrometer Commissioning

Detailed Optics Plan Name and time assignments needs to be worked out by optics crew

  1. Tracking checkout 1 shift: Bob M, Ryan R, Chandan G
    1. Sieve In, raster off. Tune B. 45 deg C target. 1 uA.
    2. Septum 377 A
    3. Check rates with scalars.
    4. Set prescales for S0 triggers.
    5. VDC checkout; look at tracks, VDC spectra
    6. Some short run for GEM: noise, pulse-heights, tracks, etc. After this GEMS out of DAQ to improve efficiency.
  2. Sieve reconstruction verification 0.25 shift:Seamus or Bob, Ryan
    1. Sieve In, raster off. Tune B. 45 deg C target. 1 uA.
    2. Septum 377 A
    3. 500k events
  3. Tune septum to central ray 1 shift: Seamus, Ryan
    1. Sieve In, raster off. Tune B. 45 deg C target. 1 uA.
    2. Beam centered on axis
    3. Start septum at 377 A
    4. 500k events per run
    5. Adjust Q1 fields by 10% low (one run) and high (one run)
      1. Identify the invariant position in the phitarg-thetaTarg space and adjust septum to move the central ray to expected location
    6. Repeat 10% low (one run) and high (one run) to verify central hole in correct location
    7. Verify for Q2 and Q3 that central hole does not move under field changes (1 run each, 10% low). (optional)
      • Expected: the hole will be invariant under all quad changes. This location is about 2mm toward beam from central hole.
    8. Last step: CYCLE QUADS to get back to precise Tune B optics
  4. Inner Edge Identification 0.5 shift: Seamus, Ryan
    1. Sieve In, raster off. Tune B. 45 deg C target. 1 uA.
    2. Beam centered on axis
    3. Start septum at central tune
    4. 500 k events per run
    5. Take 9 points over septum current from +10% to -10%
      1. The expected inner edge of the acceptance should match simulation
      2. If there is a small-angle obstruction for currents at or above the central tune current, identify the lower septum current where there is no inner obstruction for both arms. Use this as new production septum current.
    6. Last step: Cycle Septum
  5. Q1 acceptance scan 0.25 shift:Ye T
    1. Sieve In, raster off. Tune B. 45 deg C target. 1 uA.
    2. Beam centered on axis
    3. Optics at central tune
    4. 500 k events per run
    5. Take a run for Q1 filed +/-10% over 5 points (cycle, then scan top to bottom)
      • Expected: later analysis should show out of place acceptance compares to simulation.
  6. Quartz spot width minimization 0.5 shift: Ryan, Seamus? Bob?
    1. Sieve IN (If this is last step of optics configuration, take an access to pull sieve OUT)
    2. raster ON (4x6 raster)
    3. Start with central tune
    4. 45 deg C target. 1 uA.
    5. Beam centered on axis
    6. Optics at central tune
    7. 500 k events per run
    8. Take a run along eigenvector quads +/-10% for Q1 filed +/-10% over 5 points (cycle, then scan top to bottom)
      • Expected: width should be minimized
      • Tune that minimizes width at detectors is new central tune.
  7. Quartz detector checkout 1 shift: Dustin M, Devi A., VDC expert
    1. Sieve OUT
    2. raster ON (4x6 raster)
    3. Start with central tune
    4. thin C target. 0.5uA - 1 uA (want quartz scaler rates below 1MHz but need beam position monitoring)
    5. Beam centered on axis
    6. Optics at (new) central tune
    7. verify small spot at quartz (thin C, low current, sieve out, raster on?)
    8. thin C, low current, raster on, Sieve OUT: positions Plan
    9. PMT spectra: Examine pulse height distributions to get RMS/mean and PEyields
    10. rates: These will come from scalers. We can't do a rate "check" without going to integrate mode. This will be done during Width study
  8. Optics calibration data 0.5 shift Nilanga, Siyu
    1. Sieve In, raster off. Tune B. 1 uA.
    2. 45deg Tungsten target
    3. Beam centered on axis
    4. Optics at central tune
    5. 500 k events per run
    6. spectrometer momentum scan (details in run plan still)
  9. Water cell pointing 1 shift Nilanga, Siyu
    1. Sieve IN: pointing measurement
    2. Sieve OUT: pointing measurement
    3. (details in run plan still)
  10. Y target reconstruction on warm and cold ladders
    1. Raster off.
    2. 45 deg carbon
    3. 90 deg carbon
  11. Q2 measurement 0.5 shift:
    1. Production target
  12. Quartz detector rate estimate 0.5 shift KK, Dustin, Devi, Tao
    1. controlled access to change UpStream quartz detector (in each arm) to integrating mode
    2. draft plan
  13. Position At detectors : Dustin, Ryan

High current checkout

detailed plan

  1. Basic setup 0.5 shift Yves R, Ciprian G:
    • No target.
    • 50uA beam current, through Compton (backgrounds on fingers and Compton photon detector).
  2. High current with target 0.5 shift Ciprian G, Dustin M:
    1. Establish 4x4 raster. Insert lead target.
    2. Detector and SAM voltages (Dustin M)
  3. Beamline instrumentation calibration 0.5 shift Caryn P,
    1. Current ramp for BPM/BCM calibrations and detector pedestals detailed plan
  4. Initial production condition test 0.25 shift Caryn P, detailed plan
    1. detector and SAM widths
    2. regression sensitivities
    3. beam noise and asymmetry check
    4. collimator water and thermocouple temperatures,
    5. radiation monitors and ion chamber stability
  5. Width studies 0.5 shift KK,
    1. detector and SAM widths, targets, shutters, etc
    2. deinstall shutters at conclusion of test

Establish Production Conditions

  1. Beam modulation 0.5 shiftVictoria O., Ye T,: (Detectors needed for BeamMod commissioning)
    1. turn on
      1. In integrating mode
      2. check HV of Main Detector
      3. Lumis on
    2. set Amplitudes
      1. start with .100 A set amplitude. Run (at least) 2 supercycles. Check online gui plots for response.
      2. increase amplitudes by .50 A, to see response (if needed).
    3. test orthogonality
      1. after minimum 2 good supercycles (more is better) ready to examine sensitivities
      2. if orthogonality is bad, need additional time to discuss with experts about retuning beam.
    4. turn off
      1. restore conditions for Moller commissioning
  2. Detector checkout 1 shift Dustin M:
    1. quartz detector position: verify no inelastic event acceptance (plan needed)
    2. width study (plan needed)
    3. raster sync (plan needed)
  3. Spin Dance 1 shift: Simona Malace, Sanghwa Park
    1. Moller polarimeter commissioning (establish beam) (plan needed)
    2. Short spin dance (run plan needed, established optimal spin angle for this Wien state) (plan needed)
  4. Hall PQB 1 shift Caryn P,:
    1. Check asymmetries in the hall
    2. Adiabatic dampening / Matching (plan needed)
      1. Use helicity magnets to tune phase trombone
    3. Establish feedback (if Hall C is not on schedule their feedback for later)
  5. Production: 0.5-3 shift? All
  6. AT measurement: 1.5 shift? All (plan needed)
    1. Do we need to verify zero longitudinal using Moller polarimeter?
    2. Carbon
    3. Lead
    4. Calcium
  7. Initial Moller commissioning 1 shift Simona M, Sanghwa P,
    1. minimal set for first absolute measurements
  8. Initial Compton commissioning 1 shift Dave G, Juan Carlos C,
    1. minimal set for measurement conditions

Start Production

Important Activities After First Few Days

  1. Linearity Studies --
  2. Background Studies --
    1. Scans of Septum Magnet and HRS Dipole
    2. Thin Lead Target to check for inelastics at high-resolution
    3. Thin C12 to measure diamond background
  3. Possible scan of Q1 to optimize acceptance and verify that collimator defines acceptance. (old idea, still relevant?)
  4. We will start with the Wein in Spin-Right. Once we switch to Spin-Left we need to do another spin-dance.

Polarimetry Studies

  1. Compton Commissioning --   Gaskell, et.al.
    1. Beam Tune, Background reduction -- Bteam,
    2. Compton Cavity Checkout --
    3. Photon Detector Checkout -- CMU group
  2. Moller Commissioning -- Simona Malace, Don Jones, et.al.
    1. Magnet Alignment -- 1 shift (swing)
    2. Raster size and pulse-mode -- 1 shift (day)
    3. Target commissioning - 3 shifts
    4. Pulse-mode target commissioning - 2 shifts
    5. DAQ checkout -- 1 shift


Important Activities During run

  1. Linearity Studies --
  2. Background Studies --
  3. Repeat Q2 and pointing measurements
  4. Arc Energy Measurement