First tests of a Micromegas TPC in a magnetic field

Journal Article · Fri Dec 10 00:00:00 EST 2004 · Nuclear Instrumentation and Methods A

DOI:https://doi.org/10.1016/S0168-9002(04)01598-0· OSTI ID:965360

Colas, P; Giomataris, I; Lepeltier, V; Ronan, M

Since the summer of 2003, a large Micromegas TPC prototype (1000 channels, 50 cm drift, 50 cm diameter) has been operated in a 2T superconducting magnet at Saclay. A description of this apparatus and first results from cosmic ray tests are presented. Additional measurements using simpler detectors with a laser source, an X-ray gun and radio-active sources are discussed. Drift velocity and gain measurements, electron attachment and aging studies for a Micromegas TPC are presented. In particular, using simulations and measurements, it is shown that an $$Argon-CF_4$$ mixture is optimal for operation at a future Linear Collider.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: Physics Division
• DOE Contract Number: DE-AC02-05CH11231
• OSTI ID: 965360
• Report Number(s): LBNL-54789; TRN: US0903837
• Journal Information: Nuclear Instrumentation and Methods A, Related Information: Journal Publication Date: 12 August 2004
• Country of Publication: United States
• Language: English

Related Subjects

72
AGING
ELECTRON ATTACHMENT
LASERS
LINEAR COLLIDERS
MAGNETIC FIELDS
MIXTURES
SUPERCONDUCTING MAGNETS
VELOCITY
TPC
Micromegas
Gaseous detectors
Linear collider