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- Title
Testing of the method for water microleakage detection from OH hydroxyl spectral lines at the L-2M stellarator.
- Authors
Voronov, G.; Berezhetskii, M.; Bondar', Yu.; Vafin, I.; Vasil'kov, D.; Voronova, E.; Grebenshchikov, S.; Grishina, I.; Larionova, N.; Letunov, A.; Logvinenko, V.; Meshcheryakov, A.; Pleshkov, E.; Khol'nov, Yu.; Fedyanin, O.; Tsygankov, V.; Shchepetov, S.; Kurnaev, V.; Vizgalov, I.; Urusov, V.
- Abstract
Results are presented from L-2M stellarator experiments on testing a possible method for detection of water microleakages in the cooling system of the first wall and vacuum chamber of ITER. The method consists in the spectroscopic detection of spectral lines of the OH hydroxyl, which forms via the dissociation of water molecules in plasma. Emission in the spectral band of 305-310 nm can be detected even at water leakage rates less than 10 Pa m/s. Chemical reactions between water and boron compounds on the vacuum chamber wall delay the detection of leakages up to ∼2000 s. A similar phenomenon can be expected when a leakage will occur in ITER, where the materials suggested for the first wall (Be, Li) can also chemically react with water.
- Subjects
WATER leakage; HYDROXIDES; STELLARATORS; SPECTRAL lines; PHYSICS experiments; NUCLEAR reactor cooling; VACUUM chambers
- Publication
Plasma Physics Reports, 2013, Vol 39, Issue 4, p277
- ISSN
1063-780X
- Publication type
Article
- DOI
10.1134/S1063780X13040090