Performance of a Quintuple-GEM Based RICHDetector Prototype

Journal Article · Thu Dec 17 00:00:00 EST 2015 · IEEE Transactions on Nuclear Science

DOI:https://doi.org/10.1109/TNS.2015.2487999· OSTI ID:1340418

Blatnik, Marie ^[1]; Dehmelt, Klaus ^[1]; Deshpande, Abhay ^[1]; Dixit, Dhruv ^[1]; Feege, Nils ^[1]; Hemmick, Thomas K. ^[1]; Lewis, Benki ^[1]; Purschke, Martin L. ^[2]; Roh, Willilam ^[1]; Torales-Acosta, Fernando ^[1]; Videbaek, Thomas ^[1]; Zajac, Stephanie ^[1]

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1. Stony Brook Univ., NY (United States)
2. Brookhaven National Lab. (BNL), Upton, NY (United States)

Cerenkov technology is often the optimal choice for particle identification in high energy particle collision applications. Typically, the most challenging regime is at high pseudorapidity (forward) where particle identification must perform well at high laboratory momenta. For the upcoming electron ion collider (EIC), the physics goals require hadron (π, K, p) identification up to ~50 GeV/c. In this region Cerenkov ring-imaging (RICH) is the most viable solution. The speed of light in a radiator medium is inversely proportional to the refractive index. Hence, for particle identification (PID) reaching out to high momenta a small index of refraction is required. Unfortunately, the lowest indices of refraction also result in the lowest light yield ([(dNγ)/dx] ∝ sin2(θC)) driving up the radiator length and thereby the overall detector cost. In this paper we report on a successful test of a compact RICH detector (1 meter radiator) capable of delivering in excess of 10 photoelectrons per ring with a low index radiator gas (CF4). The detector concept is a natural extension of the PHENIX hadron-blind detector (HBD) achieved by adding focusing capability at low wavelength and adequate gain for high efficiency detection of single-electron induced avalanches. Our results indicate that this technology is indeed a viable choice in the forward direction of the EIC. The setup and results are described within.

• Research Organization: Brookhaven National Lab. (BNL), Upton, NY (United States). Relativistic Heavy Ion Collider (RHIC)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• Grant/Contract Number: SC00112704
• OSTI ID: 1340418
• Report Number(s): BNL-113305-2016-JA
• Journal Information: IEEE Transactions on Nuclear Science, Vol. 62, Issue 6; ISSN 0018-9499
• Publisher: Institute of Electrical and Electronics Engineers (IEEE)
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
rich detectors
Cerenkov detectors
gem detectors
micropattern gas chambers
nuclear physics instrumentation
particle detectors
particle measurements
Relativistic Heavy Ion Collider