학술논문
A Rich Detector with Two Stage Gas Amplification at Atmospheric Pressure
Document Type
Journal Article
Author
Source
Nuclear Instruments and Methods A; 343; 1; Other Information: PBD: 1 Apr 1994
Subject
Language
English
Abstract
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