A LED Flasher for TUNKA experiment

physics.ins-det

/ Authors

B. K. Lubsandorzhiev, R. V. Poleshuk, B. A. J. Shaibonov, Y. E. Vyatchin, A. Z. Zablotsky

/ Abstract

A LED flasher has been developed for TUNKA-133 EAS Cherenkov detector. A blue ultra bright InGaN LED is used as a light source in the flasher. The flasher's driver is based on a fast discharge of a small capacitor via a complementary pair of fast RF transistors. The light yield of the flasher is adjusted in the wide range of from 0 to up to 10**9 photons per pulse. The results of studies of the flasher's amplitude and timing parameters and their stability are presented.