Development of the Evacuation Systems for JEMs

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


The evacuation systems and their pumping devices for JEMs were improved year by year, in order to achieve very clean vacuum. We examined the DP cascade system thoroughly in respect of DP oil-vapor backstreaming, and refined the DP-stack and the system year by year according to experimental results. And finally, we established the refined cascade DP system for JEMs.


Safety System Clean Vacuum Evacuation System Bypass Valve Specimen Chamber 
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Copyright information

© The Author(s) 2014

Authors and Affiliations

  • Nagamitsu Yoshimura
    • 1
  1. 1.Kokubunji TokyoJapan

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