Difference between revisions of "BMOD 06142019"

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   Toll-Free Number (U.S.&  Canada):  888-240-2560
 
   Toll-Free Number (U.S.&  Canada):  888-240-2560
 
   International toll number:        408-740-7256
 
   International toll number:        408-740-7256
   Bluejeans CODE:                  628 981 532
+
   Bluejeans CODE:                  348 778 076
   Bluejeans link: https://bluejeans.com/628981532
+
   Bluejeans link: https://bluejeans.com/348778076
 
   Offline room:  CEBAF Center F324-325
 
   Offline room:  CEBAF Center F324-325
 
== Agenda ==
 
== Agenda ==
Line 29: Line 29:
 
== Minutes ==
 
== Minutes ==
  
Attending: Juliette, Paul, Victoria, Ye, Tao, Sakib
+
[[File:Bmod status.PNG|thumb|600px|right|Figure 1 - Summary and status of BMOD prep filled in during meeting.  Red is needed; green is good to go.]]
 +
 
 +
 
 +
* Introductions
 +
* Overview - Victoria
 +
** detector response to changes in beam
 +
** sequentially move in set of directions (beam modulation)
 +
** detector yield vs. <beam position> => slopes
 +
** partial derivative of bpm (or detector) vs. driving coil => sensitivities
 +
*** correlation plot or fit -> matrix, allows to calculate the slope
 +
** regression on natural beam motion also
 +
* Status - Ye and Victoria
 +
** coils work, know which direction
 +
** don't know whether positive current means a certain direction
 +
** modulation controls - sends current to coils, pause FFB
 +
** know which BPMs, and which work (tested during APEX)
 +
*** x motion the noise of the beam seemed larger
 +
*** probably because of energy lock not being on
 +
*** BPM12X at a location - should have large correlation with energy
 +
** don't know for a given coils - position and angle of beam (at target)
 +
** 5 BPMS 4AX, 4EX, 12X,
 +
** 3 x coils, 3 y coils - which is best to do analysis (Ye)
 +
** coil 1 and 3 for x may be different for PREX tune
 +
** Need a [[PREX2RunPlan2019#Establish Production Conditions | plan]] - Victoria will write it and circulate it
 +
** modulated data in main rootfile with a lot of branches
 +
** can make a special rootfile for only modulated data
 +
** "stuff" in the data stream indicating FFB paused, coils modulating, etc. - flags
 +
* Software - Tao
 +
** Generic tools for analysis - multiple runs
 +
** calculating the slopes from cycles vs. runs from incomplete supercycles
 +
** more robust if data-taking is not ideal
 +
* Aggregator - Sakib
 +
** Tao's scripts in aggregator
 +
* Documentation needed
 +
** [[Beam_Modulation | From Expert Tools]]
 +
** [[Beam_Mod_Portal | From Documentation Portal]]
 +
* meeting times
 +
 
 +
Attending: Juliette, Paul, Victoria, Ye, Tao, Sakib, Quinn, Dave Armstrong, Zeke

Latest revision as of 14:33, 14 June 2019

In the process of editing and updating this page. Please contact Juliette Mammei crowder@jlab.org with questions or suggestions.


previous meeting << >> following meeting

PREX Main << Expert Tools << Beam Modulation << Meetings

Logistic information

 BlueJeans calling instructions:
 Toll-Free Number (U.S.&  Canada):  888-240-2560
 International toll number:         408-740-7256
 Bluejeans CODE:                  348 778 076
 Bluejeans link: https://bluejeans.com/348778076
 Offline room:   CEBAF Center F324-325

Agenda


Minutes

Figure 1 - Summary and status of BMOD prep filled in during meeting. Red is needed; green is good to go.


  • Introductions
  • Overview - Victoria
    • detector response to changes in beam
    • sequentially move in set of directions (beam modulation)
    • detector yield vs. <beam position> => slopes
    • partial derivative of bpm (or detector) vs. driving coil => sensitivities
      • correlation plot or fit -> matrix, allows to calculate the slope
    • regression on natural beam motion also
  • Status - Ye and Victoria
    • coils work, know which direction
    • don't know whether positive current means a certain direction
    • modulation controls - sends current to coils, pause FFB
    • know which BPMs, and which work (tested during APEX)
      • x motion the noise of the beam seemed larger
      • probably because of energy lock not being on
      • BPM12X at a location - should have large correlation with energy
    • don't know for a given coils - position and angle of beam (at target)
    • 5 BPMS 4AX, 4EX, 12X,
    • 3 x coils, 3 y coils - which is best to do analysis (Ye)
    • coil 1 and 3 for x may be different for PREX tune
    • Need a plan - Victoria will write it and circulate it
    • modulated data in main rootfile with a lot of branches
    • can make a special rootfile for only modulated data
    • "stuff" in the data stream indicating FFB paused, coils modulating, etc. - flags
  • Software - Tao
    • Generic tools for analysis - multiple runs
    • calculating the slopes from cycles vs. runs from incomplete supercycles
    • more robust if data-taking is not ideal
  • Aggregator - Sakib
    • Tao's scripts in aggregator
  • Documentation needed
  • meeting times

Attending: Juliette, Paul, Victoria, Ye, Tao, Sakib, Quinn, Dave Armstrong, Zeke