ALMA MEMO #458

Preliminary tests of Cartridge-Type Receiver System at Atacama Site

M. Sugimoto (The University of Tokyo/NAO-J),
Y. Sekimoto (NAO-J),
S. Yokogawa (The Graduate University for Advanced Studies/NAO-J),
T. Okuda (The University of Tokyo/NAO-J),
K. Tatematsu (NAO-J),
K. Kohno (The University of Tokyo),
H. Ogawa (Osaka Prefecture University),
K. Kimura (Osaka Prefecture University),
K. Suzuki (Instrument Development Center of School of Science, Nagoya University),
T. Minamidani (Nagoya University)

2003-05-14

We have developed a cartridge-type receiver system composed of three cartridge-type receivers and a cryostat, which is designed to test on the Atacama Submillimeter Telescope Experiment (ASTE). It was preliminary evaluated at Pampa la Bola (alt. 4800 m) in the northern Chile since November 2002. The cryostat, which can house 3 cartridge-type receivers, has been developed with following technologies; a central pipe and bellows structure to reduce mechanical vibration; simple and efficient thermal links for plug-in cartridges; 3-stage Gifford McMahon cryocooler and an outdoor compressor. Engineering models of band 3 (100 GHz), band 8 (500 GHz), and band 10 (800 GHz) cartridge-type receivers were independently developed with cartridge-test cryostats. They were integrated into the cryostat at NAOJ, then the system was shipped to the site. We confirmed that the system including three receivers operates as designed and the concept of cartridge-type receiver system is very promising for the ALMA.

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