Date: Wed, 28 Sep 1994 11:12:34 EDT
Subject: Test for clean EDS window
From: tivol@tethys.ph.albany.edu

Dear Roy,
Two indications that our EDS detector needs to be warmed up and cleaned
are the FWHM of a standard peak (Mn K-alpha in our case) and differences in
energy calibration when things get really bad. It's not too difficult to run a
standard or to look at the FWHM's of a few peaks in the specimen. Comparison
with standards taken when the system is known to be clean should tell you when
you need to do something. I have to issue the caviat that I don't have light-
element capability, and I am working with 1 MV electrons, so your experience
may vary. Good luck.
Yours,
Bill Tivol