MiniGRAIL progress report 2001: the first cooldown

Details MiniGRAIL progress report 2001: the first cooldown MiniGRAIL progress report 2001: the first cooldown

Apr 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002cqgra..19.1935d&link_type=abstract

Classical and Quantum Gravity, Volume 19, Issue 7, pp. 1935-1941 (2002).

Physics

14

Scientific paper

The results of the first cooldown of MiniGRAIL are presented. MiniGRAIL is a 65 cm diameter spherical gravitational wave detector made of CuAl6%, having a mass of 1150 kg. The sphere is suspended from a seven-stage vibration isolation system with a total weight of about 950 kg. The sphere should be cooled to below 20 mK. During the first run the sphere was cooled down to 1.8 K. A forced helium flow was used to cool the sphere down to 4 K, which took only two days. Further cooling to 1.8 K was done using a 1 K pot. We measured the temperature dependence of the mechanical quality factor and made an evaluation of the heat leaks (for more details see www.minigrail.nl).

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