Abstract <p>This paper describes the process of nondestructive testing of a Dewar vessel in a cryogenic setup for studying the physical characteristics of PPMS-9 materials using a mass spectrometric method. The methodology enabled the detection and localization of a leak, as well as an estimation of its size, which was approximated to be that of a circular hole with a diameter of approximately 0.6&#xa0;microns. Following the application of Stycast epoxy adhesive to repair the defect, the evaporation rate of liquid helium was normalized.</p>

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Nondestructive Testing of the PPMS-9 Dewar Vessel Using a Mass Spectrometric Method

  • D. S. Uvin,
  • A. V. Kutergin,
  • M. A. Cherosov,
  • K. E. Spirin,
  • O. N. Vasilenko,
  • R. G. Batulin

摘要

Abstract

This paper describes the process of nondestructive testing of a Dewar vessel in a cryogenic setup for studying the physical characteristics of PPMS-9 materials using a mass spectrometric method. The methodology enabled the detection and localization of a leak, as well as an estimation of its size, which was approximated to be that of a circular hole with a diameter of approximately 0.6 microns. Following the application of Stycast epoxy adhesive to repair the defect, the evaporation rate of liquid helium was normalized.