Difference between revisions of "PREX/CREX Aug 29, 2018 10:00am"

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Back to [[Main_Page|Main Page]] >> [[PREX/CREX_Teleconferences]]  
 
Back to [[Main_Page|Main Page]] >> [[PREX/CREX_Teleconferences]]  
  
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[[PREX/CREX_Aug_22,_2018_10:00am|previous meeting]] <<  >> [[PREX/CREX_Sep_6,_2018_10:00am|following meeting]]
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[[PREX/CREX_Aug_22,_2018_10:00am|previous meeting]] <<  >> [[PREX/CREX_Sep_4,_2018_10:00am|following meeting]]
  
 
== Logistic information ==
 
== Logistic information ==
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== Agenda ==
 
== Agenda ==
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# topic
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# New PREX weekly meeting time: '''Tuesdays 10am (ET)'''
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* Dustin [https://prex.jlab.org/DocDB/0002/000228/001/PREX_II_quartzThicknessStudy.pdf Quartz thickness Study]
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# Dustin: [https://prex.jlab.org/DocDB/0002/000230/001/gemUpdate_2018August24.pdf GEM/Main det. setup at Jlab this Dec.]
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#* comment
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#* Need infrastructure / space request to give to Thia
 +
#* Space / equipment needs start in December, through APEX and at least to the start of PREX, best if all the way through PREX
 +
#* Next step on list: circulate with Chandan/Tao/KK , then back through Bob
 +
# Dustin: [https://prex.jlab.org/DocDB/0002/000229/001/PREX_II_quartzThicknessStudy.pdf Quartz thickness Study]
 +
#* Thin detectors being studied for PREX.  6mm planned, 5mm and 4mm under consideration.
 +
#* Weird result (in tandem simulations, downstream detector registers less PE than upstream detector) suggests there may be a strong angle dependence
 +
#** Intrinsic angle spread in spectrometer will be larger than expected MULS width in tandem detector test, so this needs investigation
 +
#** Simulation of angle dependence of thin detectors has not been done with high precision near the 90 degree incidence. (Maybe 6mm, but not 5mm or 4mm).
 +
#** Investigation could also repeat simulation without one of the tandem detectors to look for bugs, or output angular distribution of incident rays on second detector to consider along with an angular sensitivity plot from another simulation.
 +
#** Simulation recently updated to select rays (position,angle) from realistic acceptance in spectrometer.
 +
# Adam: [https://ace.phys.virginia.edu:80/HAPPEX/3536 New Sieve Collimator Design]
 +
#* Used CAD models to consider the size of sieve collimator needed to cover the PREX acceptance.
 +
#* Also used PREX-I hole pattern to suggest a hole pattern for the PREX-2 collimators
 +
#* This will need to be discussed with Nilanaga. Adam and Kent will follow up on that.
  
 
== Present ==
 
== Present ==
 +
Adam, Amali, Cameron, David A. Devi, Dustin, Eric, Kent, KK, Paul S., Paul K. Rich, Ryan, Seamus, Tyler, Victoria, Ye, Silviu, Guido
  
 
===Excused===
 
===Excused===
−
Ciprian G,
+
Ciprian, Bob
  
 
[[Category:Meetings]]
 
[[Category:Meetings]]
 
[[Category:Prex Weekly Meeting]]
 
[[Category:Prex Weekly Meeting]]

Latest revision as of 14:17, 30 August 2018

Back to Main Page >> PREX/CREX_Teleconferences

previous meeting << >> following meeting

Logistic information

 BlueJeans calling instructions:
 Toll-Free Number (U.S.&  Canada):  888-240-2560
 International toll number:         408-740-7256
 Bluejeans CODE:                  627 455 790
 Bluejeans link: https://bluejeans.com/627455790
 Offline room:   CEBAF Center L210A

Agenda

  1. New PREX weekly meeting time: Tuesdays 10am (ET)
  2. Dustin: GEM/Main det. setup at Jlab this Dec.
    • Need infrastructure / space request to give to Thia
    • Space / equipment needs start in December, through APEX and at least to the start of PREX, best if all the way through PREX
    • Next step on list: circulate with Chandan/Tao/KK , then back through Bob
  3. Dustin: Quartz thickness Study
    • Thin detectors being studied for PREX. 6mm planned, 5mm and 4mm under consideration.
    • Weird result (in tandem simulations, downstream detector registers less PE than upstream detector) suggests there may be a strong angle dependence
      • Intrinsic angle spread in spectrometer will be larger than expected MULS width in tandem detector test, so this needs investigation
      • Simulation of angle dependence of thin detectors has not been done with high precision near the 90 degree incidence. (Maybe 6mm, but not 5mm or 4mm).
      • Investigation could also repeat simulation without one of the tandem detectors to look for bugs, or output angular distribution of incident rays on second detector to consider along with an angular sensitivity plot from another simulation.
      • Simulation recently updated to select rays (position,angle) from realistic acceptance in spectrometer.
  4. Adam: New Sieve Collimator Design
    • Used CAD models to consider the size of sieve collimator needed to cover the PREX acceptance.
    • Also used PREX-I hole pattern to suggest a hole pattern for the PREX-2 collimators
    • This will need to be discussed with Nilanaga. Adam and Kent will follow up on that.

Present

Adam, Amali, Cameron, David A. Devi, Dustin, Eric, Kent, KK, Paul S., Paul K. Rich, Ryan, Seamus, Tyler, Victoria, Ye, Silviu, Guido

Excused

Ciprian, Bob

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