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Abstract

Magnetic measurements, based on passive loops and pick up coils, are extensively used in present day tokamak devices, even in the hostile environment of a compact machine designed to achieve thermonuclear conditions. This study undertakes to outline the approximations usually made in interpreting the rough experimental data and, where possible, to extend the applicability of this technique to the Ignitor machine for the measure of relevant parameters such as the plasma current and position, poloidal beta, internal inductance, resistive power, energy confinement time, MHD activity. The non circular cross section of the vacuum chamber, along which the measuring coils are placed, and its large inverse aspect ratio (<b>/R = .46) require for analysis the development of numerical codes based on well known theories but without simplifying assumptions concerning the shape of the plasma and of the vacuum vessel. In this paper the essential aspects of Ignitor magnetic measurements are described and then the interpreting formulas and the underlying theory discussed.

Additional information

Authors: CIRANT S, ISTITUTO DI FISICA DEL PLASMA DEL CNR, MILANO (ITALY);CENTRO NAZIONALE PER LA PROPULSIONE E L'ENERGETICA DEL CNR, POLITECNICO DI MILANO (ITALY);RUI G, ISTITUTO DI FISICA DEL PLASMA DEL CNR, MILANO (ITALY);CENTRO NAZIONALE PER LA PROPULSIONE E L'ENERGETICA DEL CNR, POLITECNICO DI MILANO (ITALY);JACCHIA A ISTITUTO DI FISICA DEL PLASMA DEL CNR, MILANO (ITALY), ISTITUTO DI FISICA DEL PLASMA DEL CNR, MILANO (ITALY);CENTRO NAZIONALE PER LA PROPULSIONE E L'ENERGETICA DEL CNR, POLITECNICO DI MILANO (ITALY);CENTRO NAZIONALE PER LA PROPULSIONE E L'ENERGETICA DEL CNR, POLITECNICO DI MILANO (ITALY), ISTITUTO DI FISICA DEL PLASMA DEL CNR, MILANO (ITALY);CENTRO NAZIONALE PER LA PROPULSIONE E L'ENERGETICA DEL CNR, POLITECNICO DI MILANO (ITALY)
Bibliographic Reference: WORKSHOP ON DIAGNOSTICS FOR FUSION REACTOR CONDITIONS, VARENNA, COMO (ITALY), SEPT. 6-17, 1982, PP. 315-327 351 P., 1983, ISBN 0-08-031161-X WRITE TO PERGAMON PRESS LTD., HEADINGTON HILL HALL, OXFORD, OX3 0BW (ENGLAND), PRICE: UKL 47, (EUR 8351 EN).
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