1. Investigation of tritium pathways in the Joint European Torus (JET) tokamak
- Author
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J.K. Ehrenberg, R.D. Monk, K.-D. Zastrow, J.T. Hogan, M. von Hellermann, Wayne A Houlberg, D. L. Hillis, M. Groth, L. D. Horton, J.P. Coad, P. D. Morgan, Philip Andrew, M.F. Stamp, and G. F. Matthews
- Subjects
Physics ,Jet (fluid) ,Tokamak ,Hydrogen ,Joint European Torus ,chemistry.chemical_element ,Condensed Matter Physics ,law.invention ,Nuclear physics ,Pedestal ,chemistry ,law ,Tritium ,Plasma diagnostics ,Diffusion (business) ,Atomic physics - Abstract
The neutral tritium concentration in the subdivertor region of JET [P.-H. Rebut, R. J. Bickerton, and B. E. Keen, Nucl. Fusion 25, 1011 (1985)] is measured during deuterium-to-tritium changeover experiments with a novel species-selective Penning gauge coupled to a high-resolution spectrometer. The subdivertor measurements, when compared with edge and strike point values, are a sensitive characterization of the status of the wall saturation. The neutral transport code (EIRENE) [D. Reiter, Forschungszentrum, Juelich: Report Juel-2599 (1992)] and a wall hydrogen trapping and diffusion code (WDIFFUSE) [J. Hogan, R. Maingi, P. Mioduszewski et al., J. Nucl. Mater. 241, 612 (1997)] evaluate the wall tritium recycling coefficients (RT) and compare them with quantitative, testable models for the dynamic exchange between recycling surfaces and the edge/pedestal region. Using the dynamic inventory model, tritium transport following the injection of trace amounts of tritium has been investigated for JET high-confinem...
- Published
- 1999