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Design of a spaceworthy adiabatic demagnetization refrigerator.

Author(s) : SERLEMITSOS A. T., SANSEBASTIAN M., KUNES E.

Type of article: Article

Summary

The new X-ray spectrometer to be flown aboard the Advanced X-ray Astrophysics Facility, uses an array of 32 microcalorimeters, capable of detecting X-rays in the energy range of 0.3-10 kiloelectronvolts with a resolution of 12 electronvolts. The detectors must be operated at a temperature of 0.065 K. An adiabatic demagnetization refrigerator (ADR) must be used to cool the detectors to that temperature. A baseline model heat switch has been tested extensively with an on/off ratio of about 10 000 and a parasitic heat leak of 10 microwatts. Various salt pills have been built employing different methods of thermal contact and of crystal growth. The new ADR design will be reported in detail.

Details

  • Original title: Design of a spaceworthy adiabatic demagnetization refrigerator.
  • Record ID : 1993-1804
  • Languages: English
  • Source: Cryogenics - vol. 32 - n. 2
  • Publication date: 1992

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