An Optical Reflector for the CANGAROO-II Telescope

Akiko Kawachi; A. Yuki; G.P. Rowell; H. Kubo; H. Muraishi; J. Jinbo; J. Kushida; J.R. Patterson; K. Nishijima; K. Sakurazawa

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An Optical Reflector for the CANGAROO-II Telescope

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arxiv astro-ph/9906075 v1 submitted 1999-06-04 astro-ph

Akiko Kawachi , J. Kushida , S.A. Dazeley , P.G. Edwards , S. Gunji , S. Hara , T. Hara , J. Jinbo

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T. Kifune H. Kubo Y. Matsubara Y. Mizumoto M. Mori M. Moriya H. Muraishi Y. Muraki T. Naito K. Nishijima J.R. Patterson M.D. Roberts G.P. Rowell T. Sako K. Sakurazawa Y. Sato R. Susukita T. Tamura T. Tanimori S. Yanagita T. Yoshida T. Yoshikoshi A. Yuki

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keywords reflectorcangaroo-iicfrplaminatesmirrorstelescopeadjustedadjustment

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abstract

We have been successful in developing light and durable mirrors made of CFRP (Carbon Fiber Reinforced Plastic) laminates for the reflector of the new CANGAROO-II 7 m telescope. The reflector has a parabolic shape (F/1.1) with a 30 m^2 effective area which consists of 60 small spherical mirrors of CFRP laminates. The orientation of each mirror can be remotely adjusted by stepping motors. After the first adjustment work, the reflector offers a point image of about $0.^\circ 14$ (FWHM) on the optic axis.

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