Subject: Problem raith SNF 2004-08-10 21:26:15: beam distorsion
From: gigi@snf.stanford.edu
Date: Tue, 10 Aug 2004 21:26:15 -0700

spot looks good at high mag, but at low mag (<1000) the spot is deformed and becomes
30x100nm. 
I noticed it becomes worse and worse starting at ~5000 and going down to 600. Since
I'm using 600X, I decided not to write.
Everything else seems fine.