Re: X-ray diffraction area monitors

[David W Lee <lee_david_w@lanl.gov>]

Steve:  Health Physics Instruments (HPI) makes a Model
2030 low-energy x-ray area monitor that was originally designed for
XRDs.  Contact John Handloser, Jr.  HPI is an affiliate member
of the HPS, the listed e-mail is jsh@fwt.com; Suite D, 330 S. Kellogg
Avenue, Goleta, CA  93117; (805) 964-3615.  Best regards 
David



At 07:03 AM 4/12/1999 -0500, you wrote:
>Wade:
>
>    I use the NaI when inspecting to look for scatter
or leakage from these 
>units -
>I like the response in the 10-40 keV range, a little better than the
end 
>window GM.
>If you go to the RADSAFE search
http://romulus.ehs.uiuc.edu/SFgate/
 and  
>type in
>low energy x-ray 8 kev you will find some responses to surveying XRDs
with
>instruments as well.
>
>    Hope this was helpful.
>
>Steve Hand
>Radiation Safety
>University of Maryland
>
>"Wade Sewell (302) 695-6627" wrote:
>
>> Hello Radsafers!
>>
>> I have a few questions regarding monitoring areas where
analytical x-ray
>> diffraction units are used.  Currently, we are using a
Ludlum model 177 alarm
>> ratemeter with an end-window GM probe placed approximately
6" from the 
>beam port
>> to monitor scatter.  Because of the low efficiency for
x-rays, we would 
>like to
>> switch the probe to possibly a Ludlum model 44-17 (which is an
end-window 
>2" x
>> 2mm NaI detector recommended for use between 10 and 60
keV).
>>
>> What would you recommend for this application?
>>
>> Do you monitor the area where x-ray diffraction units are
used?
>>
>> What do you set the alarm at?
>>
>> A few details:  these units are not "cabinet"
systems and they are 
>operated at
>> 50 kVp at 100mA.
>>
>> Thank you!
>> Wade Sewell
>> wade.a.sewell@dupontpharma.com
>>
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DAVID W. LEE
Los Alamos National Laboratory
Radiation Protection Services, ESH-12
X-Ray/Source Control Team Leader
PO Box 1663, MS K483
Los Alamos, NM  87545
PH:   (505) 667-8085
FAX:  (505) 667-9726
lee_david_w@lanl.gov