The optical re ector system for the CANGAROO-II imaging atmospheric Cherenkov telescope
نویسندگان
چکیده
A new imaging atmospheric Cherenkov telescope with a light-weight re ector has been constructed. Light, robust, and durable mirror facets of containing CFRP (Carbon Fiber Reinforced Plastic) laminates were developed for the telescope. The re ector has a parabolic shape (f/1.1) with a 30 m surface area which consists of sixty spherical mirror facets. The image size of each mirror facet is 0 .08 (FWHM) on average. The attitude of each facet can be adjusted by stepping motors. After Preprint submitted to Elsevier Preprint 26 May 2000 the rst in situ adjustment, a point image of about 0 .14 (FWHM) over 3 degree eld-of-view was obtained. The e ect of gravitational load on the optical system was con rmed to be negligible at the focal plane. The telescope has been in operation with an energy threshold for gamma-rays of < 300 GeV since May 1999.
منابع مشابه
An Optical Re ector System for the CANGAROO-II Telescope
We have developed light and durable mirrors made of CFRP (Carbon Fiber Reinforced Plastics) laminates for the re ector of the new CANGAROO-II 7 m telescope. The re ector has a parabolic shape (F/1.1) with a 30 m 2 e ective area which consists of 60 small spherical mirrors. The attitude of each mirror can be remotely adjusted by stepping motors. After the rst adjustment work, the re ector o ers ...
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