A Rich Detector with Two Stage Gas Amplification at Atmospheric Pressure
Journal Article
·
· Nuclear Instruments and Methods A
OSTI ID:828526
A prototype of a Ring Imaging Cherenkov detector (RICH) with two-stage gas amplification has been developed. The detector consists of a time projection chamber (TPC) with a sensitive volume of 19 x 20 x 6 cm3 followed by a parallel plate avalanche counter (sensitive volume 20 x 5 x 0.4 cm3) and a multiwire proportional chamber (MWPC) with 96 wires 2 mm apart. The gas used was an argon/methane/isobutane mixture (ratio 60/20/20) at atmospheric pressure. TMAE at 15 C served as the photosensitive component. The measurements were done with a calibrated VUV photon source. The following results were obtained: spatial resolution of the MWPC 1.2 mm, spatial resolution of the TPC 800 mm, attachment length (13.0 {+-} 1.6) cm and photon detection efficiency 4.2% corresponding to N0 = 25 cm-1
- Research Organization:
- Thomas Jefferson National Accelerator Facility, Newport News, VA (US)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 828526
- Report Number(s):
- CEBAF-PR-94-21; DOE/ER/40150-2860
- Journal Information:
- Nuclear Instruments and Methods A, Journal Name: Nuclear Instruments and Methods A Journal Issue: 1 Vol. 343
- Country of Publication:
- United States
- Language:
- English
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