Difference between revisions of "Real Gamma GDH Experiment (REGGE)"

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==Documents==
 
==Documents==
  
[LOI submitted to PAC 47 (LOI12-19-002)] [TAC comments] [PAC47 recommendation]
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*LOI
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*[https://userweb.jlab.org/~deurpam/GDH4HD/GDH_HD_LOI.pdf LOI submitted to PAC 47 (LOI12-19-002)]  
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*[https://userweb.jlab.org/~deurpam/GDH4HD/TAC_LOI_report.pdf  TAC comments]
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*[https://userweb.jlab.org/~deurpam/GDH4HD/TAC_LOI_Reply.pdf Reply to TAC comments]  
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*[https://userweb.jlab.org/~deurpam/GDH4HD/PAC47_LOI_Report.pdf PAC47 recommendation]
  
[Current version of the proposal]
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*Proposal:
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**[https://userweb.jlab.org/~deurpam/GDH4HD/proposal_March19.pdf 03/29/2018 version of the proposal]
  
[https://docs.google.com/document/d/1MU4HFs6mBkG2ypWAH1NqMKvzM_5djzB-qU929HlMYw0/edit?usp=sharing Justin's initial document on what is expected from the simulation]
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*Misc
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*[https://userweb.jlab.org/~deurpam/GDH4HD/Talk_GlueX_Jan18.pdf Talk given at the GlueX collaboration meeting. Jan 2018]
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**[https://docs.google.com/document/d/1MU4HFs6mBkG2ypWAH1NqMKvzM_5djzB-qU929HlMYw0/edit?usp=sharing Justin's initial document on what is expected from the simulation]
  
 
==Misc. Tasks and questions==
 
==Misc. Tasks and questions==

Revision as of 17:19, 28 October 2019

GDH wiki page

Minutes of meeting

09/17/2019

10/09/2019

10/23/2019

Documents

Misc. Tasks and questions

  • Look into the figue of merit of the experiment in the low energy, where the photon beam polarization is low. (To see if constructing an additional tagger is justified). (A. Deur)
  • How do we deal, target-wise, with solenoid ramp-down? (rare but possible. Note: Once the target is polarized, we do not need to run at high field. High field may still be needed if we run with the FDC).
  • Do we want a separate solenoid to polarize the target and perform spin flip?
    • Eugene does not feel conformable going above the current operating value of the solenoid (1.8T at the nominal target position, 2T max) and pushing the field would gain only 10%
    • Target RF equipment needs to have a frequency adapted to the field. 2.5T and 5T are good values (not 2T or 1.8T).
    • It seems a better option to have a secondary magnet for polarization and spin flip.
    • Upgrade of the PS so that we cover the low γ flux? see these minutes
  • How well can we check beam charge asymmetry with BPMs?
  • Effect of a beam position-helicity correlation on the data. (M. Dalton)
  • Update proposal with: (A. Deur)
    • Add to the list of authors
    • Updated theoretical justifications
    • MC Simulation and set-up optimization
    • Discussion about flipping target spin and beam 1/2-wave plate, see these minutes