[3dem] Rapidly deteriorating SIP pump on JEOL 2200-FS with use of cryo-holder

[Qiaohui Yang]

Dear 3DEM members,
we have a JEOL 2200-FS TEM running at 200kv which we very occasionally will use to do some cryo-TEM work (once or twice every few months).After every session, I would routinely do a round of ACD bake out and at the end of every month, I would do a round of column bake-out for 2-3 days to try to maintain the performance of the SIP pump. But recently, after installation of a new SIP pump about a year ago, we found that the SIP pump has started to deteriorate and not recover the next day, even after viewing room temperature samples. I was wondering if anyone has encountered a similar problem and if there would be any tips/advice to get around it.Thanks!
Best regards,Qiaohui 



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