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DISTORTION OF TEMPERATURE SIGNALS IN HELIUM II DUE TO PROBE GEOMETRY, AND A NEW IMPROVED PROBE.

Author(s) : SCHWERDTNER M. V., POPPE W., SCHMIDT D. W.

Type of article: Article

Summary

THE INFLUENCE OF THE GEOMETRY OF THE BOLOMETER ON THE RECORDED SHAPE OF A SECOND-SOUND SIGNAL IN A ONE-DIMENSIONAL CHANNEL WAS INVESTIGATED. IT APPEARS THAT, DEPENDING ON THE GEOMETRY OF THE BOLOMETER, THE INCOMING SIMPLE POSITIVE PULSE CAN GENERATE SECONDARY EFFECTS LEADING TO THE APPEARANCE OF A TEMPERATURE UNDERSHOOT. THE GEOMETRICAL EFFECTS CAN BE OF THE SAME ORDER OF MAGNITUDE AS THE TRUE SIGNAL. A NEW TYPE OF SECOND-SOUND PROBE IS PRESENTED WHICH AVOIDS THIS UNWANTED TRANSFORMATION OF THE INCOMING SIGNAL.

Details

  • Original title: DISTORTION OF TEMPERATURE SIGNALS IN HELIUM II DUE TO PROBE GEOMETRY, AND A NEW IMPROVED PROBE.
  • Record ID : 1990-0010
  • Languages: English
  • Source: Cryogenics - vol. 29 - n. 2
  • Publication date: 1989

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