Author/Authors :
Deiters، نويسنده , , K. T. Ingram، نويسنده , , Q. and Renker، نويسنده , , D. and Sakhelashvili، نويسنده , , T. and Britvitch، نويسنده , , I. and Kuznetsov، نويسنده , , A. and Musienko، نويسنده , , Y. and Singovsky، نويسنده , , A.، نويسنده ,
Abstract :
Specially developed avalanche photodiodes (APDs) will be used to measure the light from the 61,200 lead tungstate crystals in the barrel part of the CMS electromagnetic calorimeter. To ensure the reliability over the lifetime of the detector, every APD is screened by irradiation and burn-in before it is accepted for CMS. As part of the establishment of the screening procedure and to determine its effectiveness, a large number of APDs were screened twice. The results of these tests suggest that the required reliability will be achieved.
Keywords :
Silicon avalanche photodiodes , Calorimetry , Radiation hard , Screening
