Author/Authors :
Weilhammer، نويسنده , , Peter and Chesi، نويسنده , , E. and Dabrowski، نويسنده , , W. and Dulinski، نويسنده , , W. and Jobez، نويسنده , , J.P. and Kaplon، نويسنده , , J. and Martinengo، نويسنده , , P. and Nygهrd، نويسنده , , E. and Riedler، نويسنده , , Steven P. and Roe، نويسنده , , S. and Séguinot، نويسنده , , J. and Ypsilantis، نويسنده , , T.، نويسنده ,
Abstract :
Si pad sensors with 256 cells have been used to detect single photoelectrons from a CsI photocathode. These sensors are part of a Hybrid Photon Detector (HPD) to be used in a RICH detector in the LHC-B experiment. The I-V and C-V measurements are presented. The pad sensors are read out with the low-noise VA2 chip. Results from tests with these detectors with a 90Sr source are reported. Measurements of photoelectrons created by 160 nm wavelength photons in a CsI cathode in a test set-up are also reported. Finally, the prospects of using such sensors with fast LHC readout electronics are discussed.
