A Novel Alternative to UV-Lasers Used in Flat-Fielding VHE g-Ray Telescopes

Details A Novel Alternative to UV-Lasers Used in Flat-Fielding VHE g-Ray Telescopes A Novel Alternative to UV-Lasers Used in Flat-Fielding VHE g-Ray Telescopes

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....5.2975a&link_type=abstract

Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I

Physics

Scientific paper

Preliminary tests of an alternative calibration system for the H.E.S.S. telescope array show that it is possible to replace the currently operating UV-Laser device with an optical LED apparatus. Together with complementary optics, it is able to simulate the Cherenkov flashes, while at the same time illuminating the whole of the telescope's camera uniformly. The device in question is capable of driving a fixed number of specifically chosen LEDs to produce frequent flashes of very short duration similar to the Cherenkov emission generated by electromagnetic cascades. The design of the system continues to be refined. We describe the components and the operation of the device as developed so far.

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