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December 2009

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Subject:
Re: Have you seen this weird drift on a 733?
From:
Chris Salter <[log in to unmask]>
Reply To:
JEOL-Focused Probe Users List <[log in to unmask]>
Date:
Tue, 15 Dec 2009 20:11:50 +0000
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*

Hi, Not on a 733 but a 8800.

We had a similar problem a few years ago. It developed shortly after a column clean and had an initial period of 4 to 6 hours so no one believed that there was a problem. However this got progressively worse until it  had a period of a few minutes. I suspected that a small piece of dirt had managed to survive the clean and moved near to the beam path and was charging and discharging. 

The problem went away when we did a second column clean.

Chris Salter, BegbrokeNano,
Department of Materials, Oxford

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