Re: RADSAFE digest 2615

[Mike McKinnon <mmckinno.ndep-lv@ndep.carson-city.nv.us>]

======== Original Message ========
A FIDLER (Field Instrument for Detection of Low Energy Radiation) is a meter
developed around 1965 or so by DOE or DOD for detecting activity in the
environment from Broken Arrow incidents.  I believe it was manufactured by
Eberline for the agency and had a thin NaI xtal mounted to the window of a
6" PM tube.  A single channel analyzer mounted in a portable hand carried
meter was the readout. The meter operated in count mode.  It was designed to
detect an x-ray of about 100 kev emitted from Pu which was present at these
sites.   I once had a collection of material on this meter but unfortunatley
it went away many moves ago.  Does this jog someone's memory of  this really
neat survey meter.
Ralph Shuping


>------------------------------
>
>Date: Wed, 01 Sep 1999 23:38:10 +0200
>From: Franz Schoenhofer <schoenho@via.at>
>To: radsafe@romulus.ehs.uiuc.edu
>Subject: Re: FIDLERs and Hot Particles
>Message-ID: <3.0.5.32.19990901233810.008628d0@pop3.via.at>
>
>At 16:33 01.09.1999 -0500, you wrote:
>>My name is Craig Marianno and I am in the middle of my literature review
>>for my Ph.D. in RHP at Oregon State University.  My research mainly
>>revolves around FIDLERs and transuranic "hot particle" detection in the
>>environment.  Unfortunately, articles on these two topics are difficult to
>>locate and I believe much of the research in this area was completed
>>around the 60s.  I was wondering if anyone may know of any
>>articles/ grey papers out there on these subjects.  Any help would be
>>welcome.
>>
>
>I actually do not know what a FIDLER is, but we have worked during our
>sampling and measurement campaign on the Mururoa atoll with detection of
>hot particles (Am-241 associated with plutonium).
>
>If this is what you are interested in, please contact me at my private
>e-mail address and I can give you the source, where you can find details.
>
>Best regards,
>
>Franz
>
>
>Franz Schoenhofer
>Habicherg. 31/7
>A-1160 Vienna
>Austria
>Tel.: +43-1-495 53 08
>Fax.: same number
>mobile phone: +43-664-338 0 333
>e-mail: schoenho@via.at
>
>Office:
>Hofrat Dr. Franz Schönhofer
>Federal Institute for Food Control and Research
>Department of Radiochemistry
>Kinderspitalg. 15
>A-1095 Vienna
>Austria
>Tel.: +43-1-40 490 27820
>e-mail: schoenhofer@baluf.via.at
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>------------------------------
>
>End of RADSAFE Digest 2615
>**************************


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======== Fwd by: Mike McKinnon ========
The FIDLER actually detects the 60 keV gamma emitted by Am-241 which is a
component of weapons-grade plutonium (WGP).  This gamma is the most easily
detected one at sites containing WGP.

Mike McKinnon
mmckinno.ndep-lv@ndep.carson-city.nv.us
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