From itot at snf.stanford.edu  Tue May  8 20:36:23 2012
From: itot at snf.stanford.edu (itot at snf.stanford.edu)
Date: Tue, 8 May 2012 20:36:23 -0700
Subject: Problem sem4160 SNF 2012-05-08 20:36:23: beam image lost
Message-ID: <mailman.658.1356283033.4532.sem4160-pcs@snf.stanford.edu>

I lost the beam image on the display  when I was adjusting SEM image 
using Aperture and Stigma control knobs.



From tberg at snf.stanford.edu  Wed May  9 07:58:19 2012
From: tberg at snf.stanford.edu (tberg at snf.stanford.edu)
Date: Wed, 9 May 2012 07:58:19 -0700
Subject: Problem sem4160 SNF 2012-05-08 20:36:23: beam image lost
Message-ID: <mailman.659.1356283033.4532.sem4160-pcs@snf.stanford.edu>

Adjusted aperatures, had nice beam



From jwc at snf.stanford.edu  Thu May 10 16:04:01 2012
From: jwc at snf.stanford.edu (jwc at snf.stanford.edu)
Date: Thu, 10 May 2012 16:04:01 -0700
Subject: Problem sem4160 SNF 2012-05-10 16:04:01: aperture strip hole lost by previous user before kavehm
Message-ID: <mailman.660.1356283033.4532.sem4160-pcs@snf.stanford.edu>

kaveh reported issues with movable apeture strip.  Found Y hard against stop and off the strip.  Adjusted and attempted to find the center 



From jwc at snf.stanford.edu  Thu May 10 18:23:37 2012
From: jwc at snf.stanford.edu (jwc at snf.stanford.edu)
Date: Thu, 10 May 2012 18:23:37 -0700
Subject: Problem sem4160 SNF 2012-05-10 16:04:01: aperture strip hole lost by previous user before kavehm
Message-ID: <mailman.661.1356283033.4532.sem4160-pcs@snf.stanford.edu>

found Y all the way to stop with aperture strip aligned off far edge.
-12 turns in Y and +~30 turns in x to find 1 mm hole
final adjustments to 5 kv aperture no 4 30 mm
nice bright and stigmated and aperture strip has 4 hole positions avail.
handed off to Ben Chui for testing
jwc



From bchui at snf.stanford.edu  Thu May 10 22:01:50 2012
From: bchui at snf.stanford.edu (bchui at snf.stanford.edu)
Date: Thu, 10 May 2012 22:01:50 -0700
Subject: Comment sem4160 SNF 2012-05-10 22:01:49: Re: prev post by JWC
Message-ID: <mailman.662.1356283033.4532.sem4160-pcs@snf.stanford.edu>

Image looks good! A-OK.



From npapte at snf.stanford.edu  Mon May 14 22:54:55 2012
From: npapte at snf.stanford.edu (npapte at snf.stanford.edu)
Date: Mon, 14 May 2012 22:54:55 -0700
Subject: Comment sem4160 SNF 2012-05-14 22:54:55: beam out of alignment
Message-ID: <mailman.663.1356283033.4532.sem4160-pcs@snf.stanford.edu>

poor image at high mag