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Energy and Particle Balance Studies Under Full Boron and Lithium‐Coated Walls in TJ‐II
Author(s) -
Tabarés F.L.,
Ochando M.,
Tafalla D.,
Medina F.,
McCarthy K.,
Fontdecaba J. M.,
Liniers M.,
Guasp J.,
Ascasíbar E.,
Estrada T.,
Pastor I.
Publication year - 2010
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.200900046
Subject(s) - stellarator , lithium (medication) , boron , plasma , sputtering , ion , materials science , particle (ecology) , atomic physics , flux (metallurgy) , yield (engineering) , energy balance , electron , work (physics) , nuclear physics , physics , thermodynamics , nanotechnology , composite material , thin film , metallurgy , medicine , oceanography , quantum mechanics , geology , endocrinology
The Spanish stellarator TJ‐II has been operated under lithium wall conditions for two years so far. Important changes in plasma parameters and, in particular, on particle recycling have been recorded with respect to the normal, boronized wall conditions previously prevailing. The specific effects that the new recycling scenario could have on the improved plasma parameters, and in particular to the global energy balance of electrons and protons are addressed in the present work. In addition, the possible increase in ion energies impinging on the walls should be mirrored by the incoming flux of sputtered lithium atoms. However, a strong decrease of the corresponding sputtering yield is recorded. This effect is analyzed in terms of possible material mixing effects among others (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)