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Abstract

A passive, electrical fast-switch-off/on system for protecting electrodes subject to fortuitous high voltage vacuum breakdown has been developed. This system is based on the principle of oscillatory discharges in an RLC network, coupled with the use of a diode. When a breakdown occurs, the current is automatically and rapidly switched off, preventing the damaging of electrodes and power supply by the electrical arc. The interruption lasts as long as required to stop the short-circuit metal vapour arc. A couple of milliseconds are generally sufficient. Then the current is automatically restored, allowing a rapid recovery of the normal electrical operating conditions. Besides the economical advantages of this circuit, its operating characteristics are very useful for electrode conditioning. The aim of this study of the circuit is to protect some elements of the neutral beam injectors in the Tore Supra tokamak experiment.

Additional information

Authors: FUMELLI M, CEA, DEPARTEMENT DE RECHERCHES SUR LA FUSION CONTROLEE, SAINT-PAUL-LEZ-DURANCE (FR);JEQUIER F, CEA, DEPARTEMENT DE RECHERCHES SUR LA FUSION CONTROLEE, SAINT-PAUL-LEZ-DURANCE (FR);PAMELA J CEA, DEPARTEMENT DE RECHERCHES SUR LA FUSION CONTROLEE, SAINT-PAUL-LEZ-DURANCE (FR), CEA, DEPARTEMENT DE RECHERCHES SUR LA FUSION CONTROLEE, SAINT-PAUL-LEZ-DURANCE (FR)
Bibliographic Reference: ARTICLE: NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH A285 (1989) PP. 527-531
Record Number: 1989128071700 / Last updated on: 1990-11-09
Category: PUBLICATION
Available languages: en