Detector Seminar

Development of MicroMegas and recent experimental results

Name: Development of MicroMegas and recent experimental results
Start: 1999-12-06T11:00:00+01:00
End: 1999-12-06T14:00:00+01:00
Location: CERN

by I. Giomataris (DAPNIA-SACLAY)

Monday 6 Dec 1999, 11:00 → 14:00 Europe/Zurich

13-2- (CERN)

13-2-

CERN

Description

MicroMegas is a novel two-stage parallel plate avalanche chamber with narrow amplification gap (50-100 mm) defined by the anode plane and a cathode plane made by a thin metal microgrid. It combines high accuracy, high rate capability and robustness. The principle of the operation and basic properties of the detector will be overviewed: the signal development, the gain, the positive ion build-up, the energy resolution, the homogeneity of large area detectors, the efficiency, rate capability and radiation resistance. Special emphasis will be devoted to recent results obtained in high-energy pion beam where a space resolution of 12 mm has been measured and the high rate capabilities of the detector were explored. Finally a novel photodetector operating in the MICROMEGAS mode is presented. Using a solid photocathode (CsI) deposited on the microgrid excellent performances have been observed: high single-electron detection efficiency and a time resolution of 680 ps has been measured. The detector is suitable for many applications in physics or for high rate imaging devices.

Organiser(s): Rui Ribeiro /EP Division