Construction and Expected Performance of the Hadron Blind Detector for the PHENIX Experiment at RHIC

Conference · Mon Jan 01 04:00:00 EST 2007

OSTI ID:931202

Milov, A. ^[1]; Awes, Terry C ^[2]; Batsouli, Sotiria ^[3]; Cianciolo, Vince ^[2]; Efremenko, Yuri ^[3]; Read, Jr, Kenneth F ^[2]; Silvermyr, David O ^[2]; Sorensen, Soren P ^[4]; Stankus, Paul W ^[2]; Young, Glenn R ^[2]; Zhang, Chun ^[3]

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1. Brookhaven National Laboratory (BNL)
2. ORNL
3. University of Tennessee, Knoxville (UTK) & Oak Ridge National Laboratory (ORNL)
4. University of Tennessee, Knoxville (UTK)

A new hadron blind detector (HBD) for electron identification in high density hadron environment has been installed in the PHENIX experiment at RHIC in the fall of 2006. The HBD will identify low momentum electron-positron pairs to reduce the combinatorial background in the e{sup +}e{sup -} mass spectrum, mainly in the region below 1 GeV/c2. The HBD is a windowless proximity-focusing Cherenkov detector with a radiator length of 50 cm, a CsI photocathode and three layers of gas electron multipliers (GEM). Pure CF4 is used as a radiator and a detector gas. This proceeding describes the construction details and the expected performance of the HBD.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 931202
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CHERENKOV COUNTERS
COLLISIONS
CONSTRUCTION
ELECTRON MULTIPLIERS
ELECTRONS
HADRONS
PERFORMANCE
PHOTOCATHODES
QUARK MATTER
RADIATORS