Author/Authors :
Masayuki Hirabayashi، نويسنده , , Katsuhiro Narasaki، نويسنده , , Shoji Tsunematsu، نويسنده , , Yoshiyuki Kimura، نويسنده , , Seiji Yoshida، نويسنده , , Hiroshi Murakami، نويسنده , , Takao Nakagawa، نويسنده , , Akira Ohnishi، نويسنده , , Toshio Matsumoto، نويسنده , , Hidehiro Kaneda، نويسنده , , Keigo Enya، نويسنده , , Masahide Murakami، نويسنده ,
Abstract :
The AKARI satellite (formerly known as ASTRO-F) is Japan’s first infrared astronomical satellite. AKARI is equipped with the infrared camera (IRC) and the far-infrared surveyor (FIS), which are cooled below 7 K. The AKARI’s 68.5 cm telescope, which is made of SiC, is also cooled below 7 K. A unique feature of the AKARI cryostat is that it uses both cryogen and mechanical coolers. Using mechanical coolers, the helium lifetime can be greater than one year with 170 L of liquid helium. AKARI was launched on February 21, 2006 (UT), from the Uchinoura Space Center (USC). It has been performing successfully in orbit.
Keywords :
E. Stirling , F. Cryostat , B. Superfluid helium , F. Space cryogenics
