Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
1998-03-27
Nucl.Instrum.Meth. A413 (1998) 201-212
Physics
High Energy Physics
High Energy Physics - Experiment
24 pages, LaTeX, 13 eps figures, to be published in Nucl. Instrum. and Meth. A. Postscript file (4.5 MB) is available at htt
Scientific paper
10.1016/S0168-9002(99)00561-6
We report on a design and performances 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 temprature dependence. The diffuser box is employed to reduce the intrinsic non-uniformity of the LED light intensity. The overall performances of the present monitoring system on uniformity and intensity of the light output have been found to satisfy all the requirements for the monitoring.
Adachi Ichiro
Enomoto Ryoji
Hattori H.
Iijima Toru
Kaneda Kazuhisa
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