Gas System for Aleph {TPC}
Oct, 1989
19 pages
Published in:
- Nucl.Instrum.Meth.A 289 (1990) 176-184
Report number:
- CERN-EF-89-18,
- ALEPH-89-159,
- TPCGEN-89-016
Experiments:
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Abstract: (Elsevier)
Operation of the time projection chamber of the ALEPH experiment at LEP requires a high-purity argon/methane gas mixture supplied to the detector under stable conditions to ensure minimum signal attenuation throughout the 43 m 3 detector volume (max. 2.2 m drift length) and maintain near-constant electron drift velocity in the gas over extended periods of time. Design considerations for a gas system to fulfil these conditions are presented and details given of the construction, operational aspects and of the achieved performance.- proportional chamber: time projection
- gas: admixture
- argon
- organic compounds
- ALEPH
- CERN LEP Stor
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