Month: June 2012

The CCD camera for CM-20 TEM installed on June 5 (after last repair) was down this afternoon (June 22). The camera has the same problem as that occurred in April. I have informed Gatan engineer. I am waiting for his response.

On Jun 10, 2012, at 9:10 PM, “Jian-Guo Zheng” <jzheng@calit2.uci.edu> wrote to FEI engineer:

Hi, John:
Magellan SEM had problems during my vacation. Last Sunday, I noticed that no electron beam was observed at 1-2kV and SEM images were poor under other kVs. There was no way to do basic alignment. Last week, some progresses were made, but users were still experiencing difficulties. I checked the SEM yesterday (Saturday) and today. Here is the summary:

The SEM works well under following conditions: 10kV-30kV for field free lens It has problems under: 10kV-30kV for immersion lens (image focus drifting), 3-5kV for field free lens and immersion lens (bad lens alignment). 1-2kV for poor images.

I would appreciate it if you could help solve the problems as soon as possible. It is fine if you have to use the reserved slots this week.
Please let me know if I may help.
Thanks,

Jian-Guo