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The aerogel threshold Cherenkov detector for the High Momentum Spectrometer in Hall C at Jefferson Lab | | R.Asaturyan
; R.Ent
; H.Fenker
; D.Gaskell
; G.M.Huber
; M.Jones
; D. Mack
; H.Mkrtchyan
; B.Metzger
; N. Novikoff
; V.Tadevosyan
; W.Vulcan
; S.Wood
; | | Date: |
16 Nov 2004 | | Journal: | Nucl.Instrum.Meth. A548 (2005) 364-374 | | Subject: | Instrumentation and Detectors | physics.ins-det | | Affiliation: | Yerevan Physics Institute, Thomas Jefferson National Accelerator Facility, University of Regina, Houston Baptist University | | Abstract: | We describe a new aerogel threshold Cherenkov detector installed in the HMS spectrometer in Hall C at Jefferson Lab. The Hall C experimental program in 2003 required an improved particle identification system for better identification of pi/K/P, which was achieved by installing an additional threshold Cherenkov counter. Two types of aerogel with n=1.03 and n=1.015 allow one to reach 10^{-3} proton and 10^{-2} kaon rejection in the 1-5 GeV/c momentum range with pion detection efficiency better than 99% (97%). The detector response shows no significant position dependence due to a diffuse light collection technique. The diffusion box was equipped with 16 Photonis XP4572 PMT’s. The mean number of photoelectrons in saturation was ~16 and ~8, respectively. Moderate particle identification is feasible near threshold. | | Source: | arXiv, physics/0411147 | | Services: | Forum | Review | PDF | Favorites | |
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