Author/Authors :
Khan، نويسنده , , M.H.R. and Murakami، نويسنده , , A. and Sumiyoshi، نويسنده , , T. and Kuniya، نويسنده , , T. and Adachi، نويسنده , , I. and Enomoto، نويسنده , , R. and Hattori، نويسنده , , H. and Iijima، نويسنده , , T. and Kaneda، نويسنده , , K. and Kawabata، نويسنده , , R. and Ooba، نويسنده , , T. and Suda، نويسنده , , R. and Suzuki، نويسنده , , K. and Watanabe، نويسنده , , M.، نويسنده ,
Abstract :
We report on a design and performance of a monitoring system developed for the aerogel Cherenkov counters (ACC) of the BELLE detector. The system consists of blue LEDs, a diffuser box, and optical distributors which distribute the LED light to the ACC modules. The employed LED (NSPB series) has been observed to have high reliability on the long term stability and the temperature dependence. The diffuser box is employed to reduce the intrinsic non-uniformity of the LED light intensity. The overall performance of the present monitoring system on uniformity and intensity of the light output has been found to satisfy all the requirements for the monitoring.
Keywords :
CP violation , B-factory experiment , Aerogel Cherenkov counter , Gain monitoring , Particle identification
