Difference between revisions of "Detectors on Left HRS"

Revision as of 13:25, 20 July 2021

Page under construction (July 2021)

Goals and Purpose for L-HRS during the SBS era.

Used for the HCAL calibration. Want to measure the HCAL detector efficiency by using pi+ production in gamma p -> pi+ n, as well as ep-> e' p. The pion on L-HRS is a tag for a neutron. It is a single arm trigger. It needs to be clean to 0.5% level or know the contamination on similar level. We need to remove the proton and positron backgrounds. The L-HRS is also needed for the next hypernuclear experiments (E12-15-008, E12-20-013) in hall A.

Scintillators

Installed are the S0c, S0h, and S2m. S0c = S0 near cerenkov. S0h = S0 from HAPPEX (it is removable and likely will be removed during beam), and S2m = segmented scintillator with 16 paddles and PMTs on both sides.

S0c cabling .... https://logbooks.jlab.org/entry/3884500

VDCs

Gas Cerenkov

Pion Rejector

https://logbooks.jlab.org/files/2021/07/3884134/LHRS%20PiR%20Labeling%20%20July%207.pdf

A1 Aerogel information

Performance in 2018 .... https://logbooks.jlab.org/files/2018/10/3605975/HRS_AerogelPerformance_20181008_gogami.pdf

Also this article ... https://arxiv.org/pdf/0810.4630.pdf

A1 analysis examples in 2018 .... https://logbooks.jlab.org/entry/3624086 .... https://logbooks.jlab.org/entry/3605642 .... https://logbooks.jlab.org/files/2018/10/3611832/right_online_latest.pdf

back to main page: https://hallaweb.jlab.org/wiki/index.php/L-HRS_for_SBS