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Plasma–wall interaction in the Spanish stellarator TJ-II. Diagnostics and first results by D Tafalla; E de la Cal; B Brañas; F.L Tabarés is a Materials Science article available to read on EtoBox.

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First plasmas have been produced in the Spanish stellarator TJ-II. They have been generated by 250 kW ECR heating under all metal wall conditions. Two dierent magnetic con®gurations, corresponding to similar iota values but dierent plasma volumes, have been used. Helium glow discharge conditioning has been systematically applied previous to and between discharges. Good plasma start-up performance has been obtained, characterised by a short delay respect to the gyrotron pulse and controlled peak value of the electron density. The present results stress the important role that plasma±wall interaction phenomena are expected to play in the generation and optimisation of TJ-II plasmas in future campaigns.

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Author

D Tafalla; E de la Cal; B Brañas; F.L Tabarés

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0022-3115)

Published

1999

Language

EN

Field

Materials Science (Physical Sciences)