Author/Authors :
Hoedlmoser، نويسنده , , H. and Braem، نويسنده , , A. and De Cataldo، نويسنده , , G. and Davenport، نويسنده , , M. and Di Mauro، نويسنده , , A. and Franco، نويسنده , , Jason A. C. Gallas، نويسنده , , A. and Martinengo، نويسنده , , P. and Nappi، نويسنده , , E. and Piuz، نويسنده , , F. and Schyns، نويسنده , , E.، نويسنده ,
Abstract :
The performance of CsI photocathodes for the ALICE/HMPID detector with regard to long term stability and ageing effects has been investigated and monitored during the production phase and in dedicated ageing tests. During normal storage and test beam operations none of the monitored PCs has showed a decrease in quality within a time-frame of two years. In accelerated ageing tests with ion-bombardment in the detector caused by ionizing particles, pronounced ageing effects could be observed for charge doses ⩾ 1 mC / cm 2 , whereas irradiations with ⩽ 0.2 mC / cm 2 showed no effect.
Keywords :
ageing , CsI photocathode , HMPID , ALICE , stability , rich
