Author/Authors :
Mِrmann، نويسنده , , D. and Balcerzyk، نويسنده , , M. and Breskin، نويسنده , , A. and Chechik، نويسنده , , R. and Singh، نويسنده , , B.K. and Buzulutskov، نويسنده , , A.، نويسنده ,
Abstract :
We present the current status of our research on GEM-based gaseous photomultipliers. Detectors combining multi-GEM electron multipliers with semi-transparent and reflective photocathodes are discussed. We present recent progress in extending the sensitivity of these detectors into the visible range. We demonstrate the long-term stability of an argon-sealed bi-alkali photo-diode and provide preliminary results of a gas-sealed Kapton-GEM detector with a bi-alkali photocathode. The problem of ion-induced secondary electron emission is addressed.
Keywords :
Bi-alkali photocathodes , GEM , Sealed gaseous photomultiplier , CsI photocathodes , Single electron detection
