Application of the Acoustic Emission Technique as a Monitoring System for an FRP Cryostat

  • T. Okada
  • S. Nishijima
  • H. Iwasaki
  • K. Fujioka
  • Y. Kuraoka
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 31)

Abstract

The acoustic emission (AE) from FRP cryostats has been studied in order to establish a monitoring system for an FRP cryostat. The Kaiser effect has been found in FRP cryostats and hence using the AE method we can in principle estimate the stress history of any FRP cryostat. The condition of the coolant was also detected by AE techniques. Sudden decreases of internal pressure which lead to the rapid evaporation of coolant can be detected as sudden increases of AE activity. It is also found that the vacuum leak area caused by gaseous pressure could be located by the processing of AE sources.

Keywords

Attenuation Helium Boiling 

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Copyright information

© Plenum Press, New York 1986

Authors and Affiliations

  • T. Okada
    • 1
  • S. Nishijima
    • 1
  • H. Iwasaki
    • 1
  • K. Fujioka
    • 2
  • Y. Kuraoka
    • 2
  1. 1.ISIR Osaka UniversityIbaraki, OsakaJapan
  2. 2.Cryogenic Technology Development CenterHoxan Corp.Tsukuba, IbaragiJapan

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