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Full Record Details
Persistent URL
http://purl.org/net/epubs/work/49265
Record Status
Checked
Record Id
49265
Title
Tritium migration along the cryopumping section
Contributors
OB Malyshev (STFC Daresbury Lab.)
Abstract
The transport section of the Karlsruhe Tritium Neutrino experiment (KATRIN) must provide the dramatic reduction of tritium flow and gas density from the end of a 10-m-long windowless gaseous tritium source throughout several stages of a differential pumping system. The final stage of this section, the cryogenic pumping section (CPS) based on pumping of tritium on argon frost at 4.5 K, should provide the flow ratio between inlet and outlet in the range of 10^7. Cryosorbed tritium maydecay, emitting a few keV electrons. These electrons in their turn cause the electron-stimulated desorption of cryosorbed argon and tritium, which is redistributed along the CPS (migration process). This effect was modeled with the use of the method of angular coefficients. The main result is that the tritium migration process does not affect the CPS performance at KATRIN for a given inlet flow. Meanwhile, if the flow chosen is larger, the migration effect could be dominant.
Organisation
CCLRC
,
ASTeC
,
ASTeC-VS
,
CI
Keywords
Physics
,
Ultra high vacuum
,
cryo-pumping
,
cryo-sorbing
,
tritium decay
Funding Information
Related Research Object(s):
Licence Information:
Language
English (EN)
Type
Details
URI(s)
Local file(s)
Year
Journal Article
J Vac Sci Technol A
26, no. 1 (2007): 68-77.
10.1116/1.2816945
JVST-A26-1-2008-p…opumping section.pdf
2007
Report
CI Preprints
06-85. 2006.
2006
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