Accidents and Information, Instructing Us to Improve the Vacuum Systems of JEMs

  • Nagamitsu Yoshimura
Part of the SpringerBriefs in Applied Sciences and Technology book series (BRIEFSAPPLSCIENCES)


Some accidents sometimes occurred on the vacuum systems of JEMs. We must resolve them as soon as possible. A backstreaming accident occurred on a customer’s EM was, indeed, a most severe one for us, the vacuum engineers of JEOL. In that case the lead-glass window of the viewing chamber got gloomy after EM-film magazine was exchanged.

Accidents and information on the vacuum systems of the JEMs always instructed us how to improve the vacuum systems of JEMs.


Diffusion Pump Rotary Pump Test Dome Outgassing Rate Pirani Gauge 
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Copyright information

© The Author(s) 2014

Authors and Affiliations

  • Nagamitsu Yoshimura
    • 1
  1. 1.Kokubunji TokyoJapan

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