[asac][almanews] ALMA Memo 458 Released

[Stacy Oliver]

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

Keywords: Cryostat, Cartridge, Cryocooler, ASTE

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.

View a pdf version of ALMA Memo #458.
http://www.alma.nrao.edu/memos/html-memos/alma458/memo458.pdf

Download a zipped postscript version of ALMA Memo #458.
http://www.alma.nrao.edu/memos/html-memos/alma458/memo458.zip
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