TY - GEN
T1 - Understanding the gain characteristics of GEMs inside the Hadron Blind Detector in PHENIX
AU - Anderson, W.
AU - Azmoun, B.
AU - Chi, C. Y.
AU - Citron, Z.
AU - Dubey, A.
AU - Durham, J. M.
AU - Fraenkel, Z.
AU - Hemmick, T.
AU - Kamin, J.
AU - Kozlov, A.
AU - Milov, A.
AU - Naglis, M.
AU - Pisani, R.
AU - Ravinovich, I.
AU - Sakaguehi, T.
AU - Sharma, D.
AU - Sickles, A.
AU - Tserruya, I.
AU - Woody, C.
PY - 2007/12/1
Y1 - 2007/12/1
N2 - The Hadron Blind Detector (HBD) is new upgrade detector for the PHENIX experiment at RHIC that consists of a windowless Cherenkov radiator directly coupled to a set of triple Gas Electron Multipliers (GEMs). The individual GEMs measure 22×27 cm2, and the top GEM in the stack is coated with a ∼300 nm layer of CsI that serves as a photocathode. The signal amplitude from the triple GEM stack is used to differentiate between single isolated electrons and overlapping electrons from close pairs. Therefore, the absolute gain of the GEM stack is a crucial parameter in understanding and interpreting the data. We accumulated extensive data on the GEMs during the design and construction of the detector, including gain variation with time, charging effects, saturation, gain uniformity, and source rate dependence. These results, as well as our experience in operating the detector during its first run at RHIC, will be presented at the Workshop.
AB - The Hadron Blind Detector (HBD) is new upgrade detector for the PHENIX experiment at RHIC that consists of a windowless Cherenkov radiator directly coupled to a set of triple Gas Electron Multipliers (GEMs). The individual GEMs measure 22×27 cm2, and the top GEM in the stack is coated with a ∼300 nm layer of CsI that serves as a photocathode. The signal amplitude from the triple GEM stack is used to differentiate between single isolated electrons and overlapping electrons from close pairs. Therefore, the absolute gain of the GEM stack is a crucial parameter in understanding and interpreting the data. We accumulated extensive data on the GEMs during the design and construction of the detector, including gain variation with time, charging effects, saturation, gain uniformity, and source rate dependence. These results, as well as our experience in operating the detector during its first run at RHIC, will be presented at the Workshop.
UR - http://www.scopus.com/inward/record.url?scp=48149109445&partnerID=8YFLogxK
U2 - 10.1109/NSSMIC.2007.4437147
DO - 10.1109/NSSMIC.2007.4437147
M3 - Conference contribution
AN - SCOPUS:48149109445
SN - 1424409233
SN - 9781424409235
T3 - IEEE Nuclear Science Symposium Conference Record
SP - 4662
EP - 4665
BT - 2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC
T2 - 2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC
Y2 - 27 October 2007 through 3 November 2007
ER -