We report recent results from the development and testing of two types of micropattern gas detectors - micro-strip gas chambers and GEM-based devices with two types of pixel read-out. Thirty-two micro-strip gas chambers were tested in a high intensity hadron beam as a milestone for CERN's Compact Muon Solenoid (CMS) experiment. The detectors were operated with voltage settings corresponding to 98% hit detection efficiency at CMS for a total high intensity exposure period of 493 h. All of the requirements expected by the milestone - gain stability, number of lost strips, spark rate, etc. - were met, with wide margins. In a separate investigation, we have coupled PCB pixel read-out planes to GEM foils. In one case, 2mm × 2mm pixels were fanned out to individual discriminators and sealers to provide very fast (2 MHz/pixel) read-out; this system has been used as an imaging device to provide diagnostic information in fusion experiments. The second type of device used smaller pixels (200 μm squares) and a Flash-ADC read-out system to reconstruct individual photoelectron tracks. The angular distribution of the tracks allows the polarisation direction of polarised X-ray sources to be identified, with possible applications for future space experiments studying celestial X-ray emissions. © 2001 Elsevier Science B.V. All rights reserved.
|Pages (from-to)||41 - 54|
|Number of pages||14|
|Journal||Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment|
|Publication status||Published - 2001|
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
Bellazzini, R., Brez, A., Gariano, G., Latronico, L., Lumb, N., Moggi, A., ... Pacella, D. (2001). Micropattern gas detectors: The CMS MSGC project and gaseous pixel detector applications. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 471(1-2), 41 - 54. https://doi.org/10.1016/S0168-9002(01)00914-7