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Study of cryocooler-based HTS SQUID cooling system involving an infrared temperature controller.

[In Japanese. / En japonais.]

Author(s) : IWAO S., HATSUKADE Y., TANAKA S.

Type of article: Article

Summary

A high-Tc superconducting quantum interference device (HTS SQUID) cooling system was developed based on a pulse-tube cryocooler (PTC) and a novel temperature controller. In this system, the temperature controller uses infrared irradiation instead of the commonly employed electric heater to provide accurate and low-noise performances. The infrared light was irradiated via a fibre-optic cable onto a SQUID-mount stage, where a HTS SQUID was cooled to approximately 77 K by the PTC. The output of the irradiation source was controlled with a feedback scheme while monitoring the temperature of the SQUID-mount stage. The temperature of the stage was stabilized at 77 K, and kept within plus or minus 0.03 K deviation, for more than 2 hours by the temperature controller. The measured magnetic flux noise of the HTS SQUID magnetometer in the cooling system with the temperature controller showed little magnetic influence due to infrared irradiation.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 2006-0093
  • Languages: Japanese
  • Source: Journal of the Cryogenic Society of Japan - vol. 40 - n. 7
  • Publication date: 2005

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