ALMA MEMO #455

Cartridge Test Cryostats for ALMA Front End

Y. Sekimoto, T. Kamba, S. Yokogawa, M. Sugimoto,
T. Okuda, R. Kandori, K. Tatematsu, K. Muraoka,
A. Ueda, T. Nishino, N. Okada, T. Fukuda,
K. Kaneko, H. Ogawa, K. Kimura,
K. Noda, K. Narasaki, and K. Suzuki

April 2003

We have developed four cartridge test cryostats for ALMA FE cartridge-type receiver with taking account of reliability and easy operation. It uses a simple, compact and efficient thermal link between a cartridge-type receiver and a plate connected to a 3 stage Gifford-Mcmahon (GM) cryocooler. The cooling time of the cartridge-type receiver is less than 10 hours. With a cartridge loader, a cartridge-type receiver is easily inserted and extracted in a condition that the cryostat is closed.

View a pdf version of ALMA Memo #455.