From charley at snf.stanford.edu  Wed Jan 21 11:02:05 2004
From: charley at snf.stanford.edu (Charley)
Date: Wed, 21 Jan 2004 11:02:05 -0800
Subject: Problem, 1/21/2004
Message-ID: <400ECCAD.9020800@snf.stanford.edu>



    4160 fans,
    We have a problem that is rendering the machine unusable. There is a 
large shift in the image when
you adjust the stigmator. This means someone had fooled with the 
adjustments, or the shields I put
on over Christmas are magnetized and have moved the beam away from the 
center of the column!
I'll figure this one out and let you know as soon as I know what's up.
    Until then, you may try using it, but I don't think you'll get far. 
If you had trouble with it recently
it's not you!
    chw3



From charley at snf.stanford.edu  Wed Jan 21 14:55:22 2004
From: charley at snf.stanford.edu (Charley)
Date: Wed, 21 Jan 2004 14:55:22 -0800
Subject: 4160 status, 1/21/2004
Message-ID: <400F035A.8050308@snf.stanford.edu>



    OK, it works fine. I wrote this up on Coral but in case you're not 
looking there, the 4160 is now
looking great, 5KV, 250,000X. I think someone adjusted the stigmator 
alignment instead of the
stigmator. Bad Idea. I have it corrected and have left a couple of 
100,000X photos on the PCTV
gallery.
    Up for use, call me if you have a problem with it.
    chw3