Author/Authors :
Veloso، نويسنده , , J.F.C.A. and Amaro، نويسنده , , F.D. and Maia، نويسنده , , J.M. and Lyashenko، نويسنده , , A.V. and Breskin، نويسنده , , A. and Chechik، نويسنده , , R. and dos Santos، نويسنده , , J.M.F. and Bouianov، نويسنده , , O. and Bouianov، نويسنده , , M.، نويسنده ,
Abstract :
We present recent results on the operation of gas-avalanche detectors comprising a cascade of gas electron multipliers (GEMs) and Mico-Hole & Strip Plate (MHSP) multiplier operated in reversed-bias (R-MHSP) mode. The operation mechanism of the R-MHSP is explained and its potential contribution to ion-backflow (IBF) reduction is demonstrated. IBF values of 4×10−3 were obtained in cascaded R-MHSP and GEM multipliers at gains of about 104, though at the expense of reduced effective gain in the first R–MHSP multiplier in the cascade.
Keywords :
Gaseous photomultipliers , Gas avalanche electron multipliers , TPC , Ion back-flow , GEM , MHSP
