Résumé du preprint DAPNIA-01-09

Electron drift velocity measurements at high electric fields
P. Colas, A. Delbart, J. Derre, I. Giomataris, F.Jeanneau, V. Lepeltier, I. Papadopoulos, P. Rebourgeard
A method to measure the electron drift velocity is presented. A pulsed UV Ni-
trogen laser is used to excite both the drift and cathode Nickel micromeshes of a
Micromegas detector. The signals induced on the anode are then readout by a fast
current amplifier. Several results have been obtained for various gas mixtures and
electric fields from 10 V/cm to 14 kV/cm. Relevant applications with low (TPCs
mode) and high (pre-amplification mode) electric fields will be discussed.


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