Quantitative study of sniffer leak rate and pressure drop leak rate of liquid nitrogen panels of SST-1 tokamak

Steady State Super-conducting (SST-1) Tokamak is in commissioning stage at Institute for Plasma Research. Vacuum chamber of SST-1 Tokamak consists of 1) Vacuum vessel, an ultra high vacuum (UHV) chamber, 2) Cryostat, a high vacuum (HV) chamber. Cryostat encloses the liquid helium cooled super-conduc...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 114; no. 1; p. 012067
Main Authors Pathan, F S, Khan, Z, Semwal, P, Raval, D C, Joshi, K S, Thankey, P L, Dhanani, K R
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.05.2008
Subjects
Drop tests
Helium
High vacuum
Impact tests
Liquid helium
Liquid nitrogen
Magnets
Panels
Physics
Pressure drop
Radiation protection
Room temperature
Thermal radiation
Tokamak devices
Vacuum chambers
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Summary:Steady State Super-conducting (SST-1) Tokamak is in commissioning stage at Institute for Plasma Research. Vacuum chamber of SST-1 Tokamak consists of 1) Vacuum vessel, an ultra high vacuum (UHV) chamber, 2) Cryostat, a high vacuum (HV) chamber. Cryostat encloses the liquid helium cooled super-conducting magnets (TF and PF), which require the thermal radiation protection against room temperature. Liquid nitrogen (LN2) cooled panels are used to provide thermal shield around super-conducting magnets. During operation, LN2 panels will be under pressurized condition and its surrounding (cryostat) will be at high vacuum. Hence, LN2 panels must have very low leak rate. This paper describes an experiment to study the behaviour of the leaks in LN2 panels during sniffer test and pressure drop test using helium gas.
ISSN:1742-6596
1742-6588
1742-6596
DOI:10.1088/1742-6596/114/1/012067