Upgrade of the proximity focusing RICH at Jlab
The Hall A RICH at Jefferson Lab is undergoing an upgrade to adapt to the higher momentum kinematics of the neutron spin structure Transversity experiments planned to run in 2008. The JLab RICH is a proximity focusing detector using liquid C6F14 as Cherenkov radiator, a thin layer of CsI as photon converter, evaporated on segmented pad panels of a proportional chamber. The original RICH had a superior hadron identification up to 2 GeV/c with pion/kaon rejection at the level of 1:1000 at ~ similar90% intrinsic efficiency. The upgrade will extend this performance above 2.4 GeV/c by means of a larger photon detector (a multiwire-multipad proportional chamber) and a longer proximity gap which will improve the photon detection geometrical efficiency and the angular resolution, respectively.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC05-060R23177
- OSTI ID:
- 956156
- Report Number(s):
- JLAB-PHY-08-886; DOE/OR/23177-0586; JLAB-E-06-010; TRN: US1004899
- Journal Information:
- Nucl.Instrum.Meth.A, Vol. 595; Conference: RICH 2007, Trieste, Italy, Oct. 15-20, 2007
- Country of Publication:
- United States
- Language:
- English
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