Argon Storage Dewar Initial Fill

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Description

The argon storage dewar at the D0 Assembly Hall was filled with approximately 3100 gallons of high purity liquid argon for the first time on December 3,1990. The oxygen analyzer and high voltage test cell both indicated an oxygen impurity level between 0.4 and 0.5 ppm which is acceptable. The condenser and insulated piping sizing appears to be correct for a fill rate of a couple of hours. Insulation is required around the inlet to this piping in order to reduce the amount of filling time significantly. The graph of the level indication vs. volume of the dewar should be ... continued below

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9 pages

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Dixon, K. March 21, 1991.

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Description

The argon storage dewar at the D0 Assembly Hall was filled with approximately 3100 gallons of high purity liquid argon for the first time on December 3,1990. The oxygen analyzer and high voltage test cell both indicated an oxygen impurity level between 0.4 and 0.5 ppm which is acceptable. The condenser and insulated piping sizing appears to be correct for a fill rate of a couple of hours. Insulation is required around the inlet to this piping in order to reduce the amount of filling time significantly. The graph of the level indication vs. volume of the dewar should be changed to reflect the apparent 5.2-5.4 in. offset. Another data point may be required to narrow this number down further. A majority of the time spent to fill the vessel was associated with the testing of the liquid-this time will shorten as we gain experience. Subsequent deliveries should be ordered to initiate as early in the morning as possible, this appears to be nearly an all day effort. The argon checked prior to delivery by us indicated that it was acceptable. The analysis of the argon purity that Linde provides us is merely a check that the liquid meets our agreement with them per contract, the actual purity could be much lower than what is written in their analysis results.

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9 pages

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  • Report No.: FERMILAB-D0-EN-275
  • Grant Number: AC02-07CH11359
  • DOI: 10.2172/1031820 | External Link
  • Office of Scientific & Technical Information Report Number: 1031820
  • Archival Resource Key: ark:/67531/metadc840849

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • March 21, 1991

Added to The UNT Digital Library

  • May 19, 2016, 3:16 p.m.

Description Last Updated

  • Aug. 30, 2016, 3:49 p.m.

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Dixon, K. Argon Storage Dewar Initial Fill, report, March 21, 1991; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc840849/: accessed September 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.