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Persistent URL http://purl.org/net/epubs/work/44158
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Record Id 44158
Title Tritium gas flow dynamics through the source and transport system of the KATRIN experiment.
Abstract The source and transport system of the Karlsruhe Tritium Neutrino experiment (KATRIN) must provide a significant reduction of tritium flow and gas density. It comprises a 10 m long windowless source tube, where the tritium gas is injected, followed by a differential pumping system and a cryogenic pumping system. The primary challenge of the analysis is given by the fact that the gas flow changes from viscous flow regime inside the source tube to transitional flow regime at the first pumping stages, and to molecular flow regime at the remaining stages of the differential pumping system and further downstream. A strong molecular beaming effect must be considered. This paper presents the results of calculations of gas density and flow for the complete source and differential pumping system. It is shown that a total flow rate reduction factor of 1.4·10-8 can be attained, which is one of the prerequisites to achieve XHV conditions in the spectrometers used in the downstream end of the experiment.
Organisation ASTeC , ASTeC-VS , CI , STFC
Keywords Physics , Transitional and Molecular flow regime; Monte Carlo simulation; , Monte Carlo simulation , differential pumping , sticking probability , capture coefficient , turbo-molecular pump , Neutrino mass
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Language English (EN)
Type Details URI(s) Local file(s) Year
Journal Article J Vac Sci Technol A 27, no. 1 (2009): 73-81. 10.1116/1.3039679 JVST-A27-1-2008-p…ugh WGTS and DPS.pdf 2009
Report CI Preprints Cockcroft-07-58. 2007. Cockcroft-07-58.pdf 2007