학술논문
Operation of sealed Microstrip Gas Chambers at the ILL
Document Type
Conference
Author
Source
2000 IEEE Nuclear Science Symposium. Conference Record (Cat. No.00CH37149) Nuclear science symposium Nuclear Science Symposium Conference Record, 2000 IEEE. 1:5/44-5/49 vol.1 2000
Subject
Language
ISSN
1082-3654
Abstract
Microstrip Gas Chambers (MSGCs) were introduced at the ILL as a response to the problem of fabricating the large area neutron detector of the D20 neutron powder diffractometer. This banana-like detector consists of 48 MSGCs, each comprising 32 counting cells. It was in operation during 18 months before being stopped due to the progressive deterioration of the anode strips. In order to increase its lifetime, significant modifications were introduced in the recently assembled new version. Another instrument, D4C, was recently equipped with a modular detector made of 9 MSGCs, each of them in an individual gas vessel. Besides the uni-dimensional individual readout MSGC of D20 and D4C, the ILL has developed bi-dimensional MSGCs with a charge division readout. All these detectors employ sealed vessels containing a gas mixture at a pressure which can be as high as 15 bars, necessitating very clean conditions. This paper describes the experience acquired at the ILL in the fabrication and operation of these detectors.