Author/Authors :
Chechik، نويسنده , , R and Breskin، نويسنده , , A and Garty، نويسنده , , J. Mattout، نويسنده , , J and Sauli، نويسنده , , F and Shefer، نويسنده , , E، نويسنده ,
Abstract :
We report on the properties of the Gaseous Electron Multiplier (GEM) operated at 10–40 Torr isobutane and methane. We found stable operation at gains of a few thousand, fast response and effective photon-feedback reduction. The transmission of single electrons through the GEM apertures was studied. Ion-induced feedback, from a wire chamber following the GEM, was found to limit the total two-stage multiplication at high GEM gains. A stable double-GEM operation with reduced ion-feedback was demonstrated. Some applications are discussed.
