Re: Q: Bringing up x-rays after filament change

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#299

From: Andy Slagle
Date: Wed, 22 Mar 1995 12:58

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In article <3klouh$a2l@riscsm.scripps.edu> matt@perutz.salk.edu (Matthew Bowen Harrington) writes:
>From: matt@perutz.salk.edu (Matthew Bowen Harrington)
>Subject: Q: Bringing up x-rays after filament change
>Date: 21 Mar 1995 05:41:37 GMT

>After replacing the cathode filament, how slowly must the voltage and
>current be brought up?  I guess it's not a good idea to jump to the
>running voltage/current right away.

>Matt Harrington

I go 30 minutes at each 20kV/50mA, 30/100, 30/150, 35/180 to 40/200.
I go 5-10 minutes between each when bringing it up on a normal day.
One very important thing is to watch the vacuum because as you bring
up the power lot's water (mostly, I presume) gets desorbed form the
walls.  If you try to bring up our Rigaku too fast the pressure gets
to high and the thing shuts itself off.

Andy Slagle

Andy Slagle
aslagle@uoknor.edu

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From: aslagle@uoknor.edu (Andy Slagle)
Newsgroups: sci.techniques.xtallography,bionet.xtallography
Subject: Re: Q: Bringing up x-rays after filament change
Date: Wed, 22 Mar 1995 12:58:14
Organization: University of Oklahoma
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