Difference between revisions of "Task-List-main"

From PREX Wiki
Jump to navigationJump to search
 
(10 intermediate revisions by 2 users not shown)
Line 1: Line 1:
−
<big> <font color="" size="+2"> Task List, Preparing for 2018 Run </font></big>
+
<big> <font color="" size="+2"> Task List, Preparing for 2019 Run </font></big>
  
  
 
__FORCETOC__
 
__FORCETOC__
  
−
== Simulation ==
+
 
−
'''Base design, v3 Benchmarks.'''  <<Complete by March 16>>
+
== Radiation Benchmarking ==
 +
* ERR recommendation
 +
* Contact Dave Hamlette, Javier Gomez to discuss metrics for benchmark
 +
 
 +
 
 +
 
 +
== Design and Simulation ==
 +
===Base design, v3 Benchmarks.===
 +
<<Complete by March 16>>
 
* Need new benchmarks (accounting for updated geometry (dump, HRS) and SAMS
 
* Need new benchmarks (accounting for updated geometry (dump, HRS) and SAMS
 
** for PREX-I, HAPPEX-II, PREX-2, CREX (and others?)
 
** for PREX-I, HAPPEX-II, PREX-2, CREX (and others?)
Line 34: Line 42:
 
* DVCS?
 
* DVCS?
 
 
−
'''Geometry, Next iteration.''' <<Complete by April 6>>.
+
===Geometry, Next iteration.===
 +
<<Complete by April 6>>.
 
* realistic gaps around dump shield
 
* realistic gaps around dump shield
 
* target chamber
 
* target chamber
Line 41: Line 50:
 
* modified SAM design?
 
* modified SAM design?
  
−
'''O-Ring damage:'''
+
===Magnetic Shielding===
 +
* Evaluate B-field in Q1 beampipe with only one Q1 energized
 +
* Evaluate the Tritium-Magnetic-shield design
 +
* Evaluate mag shield additions for upstream/downstream septum beampipe
 +
 
 +
===O-Ring damage===
 
* Plots:
 
* Plots:
 
** E-weighted, electron only plots from beamline det an o-ring det
 
** E-weighted, electron only plots from beamline det an o-ring det
Line 63: Line 77:
 
** CREX
 
** CREX
  
−
'''SAM redesign:'''
+
===SAM redesign===
 
* calculate rates vs angle
 
* calculate rates vs angle
 
* calculate doses vs angles
 
* calculate doses vs angles
 
* get details on beer can, make default design including welding
 
* get details on beer can, make default design including welding
 
* Attempt final design
 
* Attempt final design
 +
* Propose/Exam alternative SBMs
  
−
'''Activation Estimation'''
+
===Activation Estimation===
 
* Downstream septum beampipe flange, contact dose
 
* Downstream septum beampipe flange, contact dose
 
* Downstream septum beampipe flange, whole body dose
 
* Downstream septum beampipe flange, whole body dose
Line 76: Line 91:
 
* DUST ACTIVATION?
 
* DUST ACTIVATION?
  
−
'''HDPE parameters:'''
+
===HDPE parameters===
 
* Total / peak radiation dose. Damage?
 
* Total / peak radiation dose. Damage?
 
* spec non-flamable HDPE, or devise fireproofing
 
* spec non-flamable HDPE, or devise fireproofing
  
−
'''Thermal Neutrons:'''
+
===Thermal Neutrons:===
 
* count thermal/near thermal (<1eV rate), assume 8MeV / n energy release, compare to E&M power   
 
* count thermal/near thermal (<1eV rate), assume 8MeV / n energy release, compare to E&M power   
 
* plot sources of thermal neutrons in hall, using hall-lid and HRS-platform detectors
 
* plot sources of thermal neutrons in hall, using hall-lid and HRS-platform detectors
Line 86: Line 101:
 
* calculate thermal neutrons at Compton polarimeter
 
* calculate thermal neutrons at Compton polarimeter
  
 +
=== Polarimeter doses ===
 +
* Evaluate dose and neutron rates (both thermal and above) at Moller and Compton locations
 +
** Moller target holder uses o-ring (evaluate dose)
  
 +
=== Spectrometer Optics Design ===
 +
* FOM optimization
 +
* Q1 collimator cut-out
  
 
== Analysis Chain ==
 
== Analysis Chain ==
 +
* First attempt at new analyzer <<June deadline>>
 +
* Test on PREX1 data.
 +
** (Re)Create plots that were used to verify PREX1 data integrity/quality
 +
** Add analysis and drawing macros to analyzer package
 +
* Create fake PREX2/CREX data with updated names and addresses for BCMs, BPMs.
 +
* Use macros to create online monitoring GUIs
 +
** Add warning messages for online monitoring for shift crew
  
  
 
== DAQ / Slow Controls ==
 
== DAQ / Slow Controls ==
 +
* Multicrate running.
 +
* Sync monitor.
 +
* Test fast event transfer to online monitor/feedback at 240 Hz
 +
* ADC maintenance - number of channels, etc
 +
* BCM, digital cavity receivers - verify functioning
 +
* Select which BPMs should be in the data stream. very proper functioning at 240 Hz
 +
* slow controls
  
  
 +
== Beam Modulation System ==
 +
* Testing of installed hardware
 +
* Evaluation of accelerator interface software
 +
* Coordination with other halls, scheduling committee
 +
*Beam modulation software (Hall)
 +
** modulation process
 +
** slow control / monitoring
 +
** DAQ interface
  
−
== Beam Modulation System ==
 
  
  
 
== Detector Stack ==
 
== Detector Stack ==
−
'''GEMs'''
+
===GEMs===
 +
 
 +
===Integrating Detectors===
 +
* Complete Design
 +
* Linearity Studies
 +
* Plan for Blind tubes in spectrometer hut?
 +
 
 +
===Detector Mounting Hardware===
 +
 
 +
== Polarized Source / Injector ==
 +
* RTP / KD*P?
 +
* Test setting limits on spot size
 +
* Outline configuration procedure and run-planning
 +
* spin-flipper studies
 +
 
 +
 
 +
 
 +
== Moller Polarimeter ==
 +
* 1 GeV Optics
 +
* simulation for acceptance evaluation
 +
* target system installation
 +
* Plan to establish high-precision Moller polarimetry (ERR recommendation)
 +
 
 +
 
 +
 
 +
== Compton Polarimeter ==
 +
* Plan to establish high-precision Compton polarimetry (ERR recommendation)
 +
* Laser Maintenance and improvement, summer 2018
 +
* e- detector, final plan
  
−
'''Integrating Detectors'''
 
  
−
'''Detector Mounting Hardware'''
 
  
−
== Polarized Source ==
 
  
 
== Documentation ==
 
== Documentation ==
  
−
'''Formal'''
+
=== Run planning ===
 +
* Plan for beam alignment (collimator, dump) and raster commissioning (ERR recommendation)
 +
* Comprehensive List / Planning for survey and alignment tasks
 +
* Watercell (pointing) runplan
 +
* optics runplan
 +
* detector alignment run plan
 +
 
 +
===Formal===
 +
* Finalize OSPs (ERR recommendation)
 +
 
 +
===Collaboration===
 +
 
  
−
'''Collaboration'''
+
[[Category:Meetings]]
 +
[[Category:Prex Weekly Meeting]]
 +
[[Category:Task List]]

Latest revision as of 15:46, 7 June 2018

Task List, Preparing for 2019 Run



Radiation Benchmarking

  • ERR recommendation
  • Contact Dave Hamlette, Javier Gomez to discuss metrics for benchmark


Design and Simulation

Base design, v3 Benchmarks.

<<Complete by March 16>>

  • Need new benchmarks (accounting for updated geometry (dump, HRS) and SAMS
    • for PREX-I, HAPPEX-II, PREX-2, CREX (and others?)
    • on HRS detectors, under HRS detectors, Hall Lid or Hall Wall total ("whole hall"), and Hall Lid skyshine estimates
  • prex2-v3:
    • prex-2 dump, with shield
    • no SAMS, or alternative SAMs?
  • crex2-v3:
    • (same with 48Ca target and 2.1 GeV)
  • prex1-"??name??"
    • PREX-I collimator
    • PREX-I chamber? (not as important)
    • PREX-I dump (with KW correction)
    • no HDPE, no SkyshineShield
    • Full size HRS det and structure, match prex2
    • FULL PREX-I SAMS
  • HAPPEX-II - ??name??
    • HAPPEX-II collimator (same as PREX-I?)
    • PREX-I dump (with KW correction)
    • 3.2 GeV, 20cm LH2
    • PREX-I chamber (not as important)
    • no HDPE, no SkyshineShield
    • Full size HRS det and strucutre, match prex2 sim
    • FULL PREX-I SAMS
  • PV-DIS?
  • HAPPEX-3?
  • TRITIUM (11 GeV)?
  • DVCS?

Geometry, Next iteration.

<<Complete by April 6>>.

  • realistic gaps around dump shield
  • target chamber
  • collimator chamber to match design
  • HDPE around target to match design
  • modified SAM design?

Magnetic Shielding

  • Evaluate B-field in Q1 beampipe with only one Q1 energized
  • Evaluate the Tritium-Magnetic-shield design
  • Evaluate mag shield additions for upstream/downstream septum beampipe

O-Ring damage

  • Plots:
    • E-weighted, electron only plots from beamline det an o-ring det
    • tables to arrive at integrated grays
    • hall-lid det x0/y0 plot to show enhancement from full SAMS
  • get info on O-ring from engineering. (material, lifetime expectations, also when did this appear?)
  • Full base design (Feb18), but w/o dump shield
    • Use Al around O-ring
      • No SAMS
      • PREX-I SAMS
    • test 1/2 size O-ring (PREX) (PREX-I SAMS)
      • Done, but dumb results. Compare 1/2 size O-ring with 1/2 of full size O-ring.
    • test no material around O-ring (PREX) (PREX-I SAMS)
    • CREX
      • No SAMS
      • PREX-I SAMS
    • check beam-offset run
  • Results for alternative SAM configs
  • Final estimate use full base design (Feb18), including dump shield
    • PREX-2
    • CREX

SAM redesign

  • calculate rates vs angle
  • calculate doses vs angles
  • get details on beer can, make default design including welding
  • Attempt final design
  • Propose/Exam alternative SBMs

Activation Estimation

  • Downstream septum beampipe flange, contact dose
  • Downstream septum beampipe flange, whole body dose
  • CREX activation estimates
  • HDPE activation.
  • DUST ACTIVATION?

HDPE parameters

  • Total / peak radiation dose. Damage?
  • spec non-flamable HDPE, or devise fireproofing

Thermal Neutrons:

  • count thermal/near thermal (<1eV rate), assume 8MeV / n energy release, compare to E&M power
  • plot sources of thermal neutrons in hall, using hall-lid and HRS-platform detectors
  • consider effect of 5% boron
  • calculate thermal neutrons at Compton polarimeter

Polarimeter doses

  • Evaluate dose and neutron rates (both thermal and above) at Moller and Compton locations
    • Moller target holder uses o-ring (evaluate dose)

Spectrometer Optics Design

  • FOM optimization
  • Q1 collimator cut-out

Analysis Chain

  • First attempt at new analyzer <<June deadline>>
  • Test on PREX1 data.
    • (Re)Create plots that were used to verify PREX1 data integrity/quality
    • Add analysis and drawing macros to analyzer package
  • Create fake PREX2/CREX data with updated names and addresses for BCMs, BPMs.
  • Use macros to create online monitoring GUIs
    • Add warning messages for online monitoring for shift crew


DAQ / Slow Controls

  • Multicrate running.
  • Sync monitor.
  • Test fast event transfer to online monitor/feedback at 240 Hz
  • ADC maintenance - number of channels, etc
  • BCM, digital cavity receivers - verify functioning
  • Select which BPMs should be in the data stream. very proper functioning at 240 Hz
  • slow controls


Beam Modulation System

  • Testing of installed hardware
  • Evaluation of accelerator interface software
  • Coordination with other halls, scheduling committee
  • Beam modulation software (Hall)
    • modulation process
    • slow control / monitoring
    • DAQ interface


Detector Stack

GEMs

Integrating Detectors

  • Complete Design
  • Linearity Studies
  • Plan for Blind tubes in spectrometer hut?

Detector Mounting Hardware

Polarized Source / Injector

  • RTP / KD*P?
  • Test setting limits on spot size
  • Outline configuration procedure and run-planning
  • spin-flipper studies


Moller Polarimeter

  • 1 GeV Optics
  • simulation for acceptance evaluation
  • target system installation
  • Plan to establish high-precision Moller polarimetry (ERR recommendation)


Compton Polarimeter

  • Plan to establish high-precision Compton polarimetry (ERR recommendation)
  • Laser Maintenance and improvement, summer 2018
  • e- detector, final plan



Documentation

Run planning

  • Plan for beam alignment (collimator, dump) and raster commissioning (ERR recommendation)
  • Comprehensive List / Planning for survey and alignment tasks
  • Watercell (pointing) runplan
  • optics runplan
  • detector alignment run plan

Formal

  • Finalize OSPs (ERR recommendation)

Collaboration

Retrieved from "https://prex.jlab.org/wiki/index.php?title=Task-List-main&oldid=2997"