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首页> 外文期刊>journal of applied physics >A freehyphen;floating superconducting bolometermdash;A sensitive heathyphen;pulse detector
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A freehyphen;floating superconducting bolometermdash;A sensitive heathyphen;pulse detector

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摘要

A freehyphen;floating (no substrate) granular aluminum superconducting bolometer has been made and tested. Sensitivity and timehyphen;constant measurements were compared with those of similar bolometers fabricated on glass and Al2O3substrates. The responses were first studied with the bolometer isolated in a vacuum chamber which was immersed in a superfluid liquidhyphen;helium bath and cooled by conduction through the contact leads, and again after incremental increases of helium gas were introduced into the sample chamber. The measurements show that for low gas pressures (lsim;10minus;4cm Hg) the floating bolometer was between one and two orders of magnitude more sensitive than identical bolometers on substrates. With increasing gas pressure, the formation of a superfluid helium film of an approximate thickness of three atomic layers caused a reduction of the floating bolometer sensitivity by nearly two orders of magnitude. The effect of bolometers on substrates was, on the other hand, only 30percnt;. The results provide strong evidence that the Kapitza conductance into helium occurs in the first two or three atomic layers.

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    《journal of applied physics》 |1977年第7期|2723-2728|共页
  • 作者

    M. A. Chin;

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  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 英语
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