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  Ultrapure gases - From the Production Plant to the Laboratory

Simgen, H., & Zuzel, G. (2006). Ultrapure gases - From the Production Plant to the Laboratory. In P. Loaiza (Ed.), Topical workshop on low radioactivitytechniques: LRT 2006 (pp. 45-50). American Institute of Physics.

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Item Permalink: https://hdl.handle.net/11858/00-001M-0000-0011-7F36-B Version Permalink: https://hdl.handle.net/11858/00-001M-0000-0011-7F37-9
Genre: Conference Paper

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 Creators:
Simgen, H.1, Author           
Zuzel, G.1, Author           
Affiliations:
1Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society, ou_904549              

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 Abstract: Radioactive noble gas isotopes are a potential source of background in low-level physics experiments, since they are present in the atmosphere and also in widely used gases produced from the atmosphere. We have studied the 39Ar, 85Kr and 222Rn contamination of commercially available nitrogen using low background proportional counters and a rare gas mass spectrometer. It was found that air separation plants are very effective in removing traces of radioactive noble gases and that the available purity can be significantly higher than commercial specifications. On the other hand the gas handling processes which are necessary to deliver gases from the production plant to the customer are a possible source of re-contaminations and determine in most cases the achievable purity. By simulating these processes under realistic conditions we have establish together with the Italian company 'SOL group' a well controlled delivery path which can hold the purity. For the short-lived 222Rn the initial contamination is less critical, because it decays away. Instead the emanation rate of the cryogenic tank was found to determine the achievable purity, since it permanently delivers new 222Rn.

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Language(s): eng - English
 Dates: 2006-10-01
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: eDoc: 293437
 Degree: -

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Title: 2nd Topical Workshop in Low Radioactivity Techniques
Place of Event: Aussois, France
Start-/End Date: 2006-10-01 - 2006-10-04

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Title: Topical workshop on low radioactivitytechniques: LRT 2006
Source Genre: Proceedings
 Creator(s):
Loaiza, Pia, Editor
Affiliations:
-
Publ. Info: American Institute of Physics
Pages: 160 S. Volume / Issue: - Sequence Number: - Start / End Page: 45 - 50 Identifier: ISBN: 978-0-7354-0402-1

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Title: AIP Conference Proceedings
Source Genre: Series
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Publ. Info: -
Pages: - Volume / Issue: 897 Sequence Number: - Start / End Page: - Identifier: -