View source for FY2022 beam test high rate summary

=High rate at 18 deg=
==Goals==
*SPD PID study (need photon samples)
*ECal PID study (charged electron and pion samples)
*We need to study LASPD timing

==Run Information==
*The 18 deg run was carried out from Feb. 20 to March 20, 2023.
*Mike's run list:
**run list [https://docs.google.com/spreadsheets/d/1HJXnRIbr646CiAdeprF8JcMBowMJ0t8A/edit?pli=1#gid=1422715418 google spreadsheet]
**runs divided into conditions: [https://docs.google.com/presentation/d/1R9CSADssyumREaxqnIwN-hKy_BsLrKc1/edit#slide=id.p1 google slides]
*Detector layout:
**Schematic layout with detector sizes: [https://solid.jlab.org/wiki/images/7/7a/Detector_layout_highrate.pdf pdf] [https://solid.jlab.org/wiki/images/5/55/Detector_layout_highrate.ppt ppt]
**Jimmy's record: [https://solid.jlab.org/wiki/index.php/File:Solid_beam_test_table_measurements_18_degree.pdf beam_test_table_measurements_18_degree.pdf]
**Shower prototype PMT information (gain vs. HV): [https://redmine.jlab.org/attachments/2064 HV_JLab_prototype.xlsx] from Ye Tian (China)
*Jixie's online run list on redmine: [https://redmine.jlab.org/projects/solid-ecal/wiki/Hallc_beamtest_runlist online run list June 2022 - Jan 6, 2023]; [https://redmine.jlab.org/projects/solid-ecal/wiki/Hallc_beamtest_runlist_highrate Jan 11 - Feb 19, 2023]; [https://redmine.jlab.org/projects/solid-ecal/wiki/Hallc_beamtest_runlist_18deg Feb 20 - March 18, 2023]
*Jixie's [https://redmine.jlab.org/projects/solid-ecal/wiki/Cable_map_(signal_&_HV) cable and HV map] on redmine
*[https://solid.jlab.org/wiki/images/1/1c/Survey_C2067.pdf Survey (alignment) report dated 04/06/2023]
*[https://redmine.jlab.org/projects/solid-ecal/wiki/Dosimetry Dosimeter reading report] on redmine
*[https://redmine.jlab.org/projects/solid-ecal/wiki/2022_JLab_Hall_C_Beam_test 2022 Beam Test Redmine page]

==List of Suggested Technical Notes==
*(Mike/Jimmy) alignment and layout
*(Mike) radiation dosimeter reading
*(Mike) Runlist (4 plots static for 18 deg linking to dynamic plots, also including 82 and 7 deg), including rates
*(Darren+someone) Cherenkov analysis
*(Mike/Zhiwen) summary of rates from preCDR work for each detector (to compare with our beam test)
*(Jixie) data cooking, pulse finding, integration and deconvolution
*(Ye) clean sample events – what types of runs to use and how to define them
*(Carter) LASPD timing extraction, including "edge-finding" algorithm in decoder

=High rate at 7 deg=
==Goals==
*Rates here were too high for proper PID analysis. We focused on carbon foil (and other thin) targets, and asked 5uA dedicated beam time for 20 minutes a week to check out the system. HVs were kept off during high luminosity running.
*main goal will be to make sure detectors all work properly
*Data may be useful to characterize limit of the detectors (under what situation would the detector signal "saturate"?)
==Test Conditions==
*The 7 deg run was carried out from January to February 2023, during XEM2 experiments
==Run Information==
*Jimmy's record of detector layout:
**[https://solid.jlab.org/wiki/index.php/File:Solid_beam_test_table_measurements_7_degree.pdf beam_test_table_measurements_7_degree.pdf]
*Dosimeter reading report

=Target Information=
The target ladder was unchanged from 7 to 18 deg (XEM2) and then to deuteron disintegration. The complete list can be found at https://wiki.jlab.org/xem2wiki/index.php/Data_Analysis_-_Target_Information
Specifically:
*Target information:
**from Dave Gaskell:
***3He: T=5.6 K, P=55 PSI, density=0.041 g/cm3 -- 3He started out around 100 PSI before the leak 
***4He: T=5.6K P=110 PSI, density=0.129 g/cm3
***Both targets 10 cm long (nominal)
**From Nadia Fomin:
***carbon target: 0.574 g/cm^2 +/- 0.002 (edited) 
**Xiaochao comment: So 3He is slightly thinner than carbon, and 4He is about twice as thick