59. Ultrasonic absorption in superconduc
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L. Mackinnon; A. Myers
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Article
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1958
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Elsevier Science
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A robust bolometer employing a tin element at its superconductive transition will be described. The instrument is designed to respond to infra-red radiation chopped at 10 Hz and the signal is amplified, by a special transformer operating in liquid helium, prior to electronic amplification and record