ANALYSIS OF MHD EQUILIBRIA BY TOROIDAL MULTIPOLAR EXPANSIONS
The use of fully toroidal coordinates permits the 2- dimensional problem of the axisymmetric plasma toroidal equilibrium to be reduced to the 1-dimensional problem of determining a limited number of its toroidal multipolar moments. This has allowed the creation of a fast semi- analytic predictive equilibrium code that can be used for any plasma shape in both free and fixed boundary conditions. The concept of toroidal multipoles is also particularly suitable for the analysis of experimental data from magnetic probe measurements and clarifies the conditions under which the plasma thermal and electrical self inductances beta-p and l-i can be separately estimated. Finally, the interpretation of the magnetic equilibrium measurements in terms of toroidal multipoles is natural as it can directly provide the boundary conditions for a fast equilibrium reconstruction code. Examples of the application of such a code to the JET magnetic measurements are reported.
Bibliographic Reference: WRITE TO SERVIZIO STUDI E DOCUMENTAZIONE - ENEA, CENTRO RICERCHE ENERGIA FRASCATI, C.P. 65 - 00044 FRASCATI, ROMA (ITALY), MENTIONING REPORT RT/FUS/85/7, 1985
Record Number: 1989125030900 / Last updated on: 1987-03-01
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