From:
Erik B. Pietrowicz <Erik.B.Pietrowicz**At_Symbol_Here**DARTMOUTH.EDU>
Subject:
Re: [DCHAS-L] Soft energy x-ray surveying
Date:
Aug 12, 2024 04:30 UTC
Reply-To:
ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Message-ID:
<MN2PR03MB51034D80AAD88ABFE2D906C7AD852**At_Symbol_Here**MN2PR03MB5103.namprd03.prod.outlook.com>
In-Reply-To:
<e0f74847c5bf4f0c939a7de53be0be96**At_Symbol_Here**toast.net>
If you haven’t, I would check with your EHS/radiation safety program first. They may have appropriate meters to use, and you may have state regulations to comply with. I believe
this varies by state, but for us, NH defines what is acceptable when performing leak surveys. For example, while Ernest’s method is clever, it wouldn’t fly in NH because we have to maintain quantitative monitoring capability for X-ray machines. If you don’t
have access to a meter, or can’t rent one, I would use radiation badges from suppliers such as Landauer. We use these as area monitors for all our units.
-Erik
Dartmouth College EHS
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
On Behalf Of Ernest Lippert
Sent: Tuesday, August 6, 2024 5:07 PM
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Subject: Re: [DCHAS-L] Soft energy x-ray surveying
I have an idea for a "quick & dirty" survey. Procure some black paper envelopes. Inside of these place a piece of x-ray film with a paper clip attached. Position these strategically around the
instrument. One control should be kept in a different room, preferably in a meal box or wrapped in metal foil. A second control is intentionally exposed to the x-ray beam. This might provide some useful information. Even if it doesn't, in will certainly come
in below $18K. It might give you useful information if the suspected leakage is diffuse rather than a collimated beam.
From: "Melinda Box" <melinda.box**At_Symbol_Here**GMAIL.COM>
Sent: Tuesday, August 6, 2024 5:31 PM
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Subject: [DCHAS-L] Soft energy x-ray surveying
Hello, all,
I am looking for information about surveying services that provide testing for soft energy x-rays (i.e. 1-3 keV). We have a recently setup XPS system that we would like to survey to verify that
it has no leakage. Unfortunately, the sole source that I was able to find for a suitable survey meter quotes a price of ~$18,000, so that option is a bit financially remote.
Anyway, any ideas or possibilities you might suggest much appreciated,
Melinda Box, MEd, CCHO
Elon University
Chemistry Dept Lab Manager
(336) 278-6225
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