THREE AND FOUR PERIOD FLEXIBLE HELIAeS
نویسندگان
چکیده
IDEAL STABILITY STUDIES FOR THREE AND FOUR PERIOD FLEXIBLE HELIACS. The stability properties of two realizations of the flexible Heliac concept presently under construction HI in Australia and TJ-ll in Spain are described. HI and TJ-ll equilibria, calculated by using the VMEC code, are analysed for their stability with respect to Mercier modes and, in the TJ-ll case, to low-n modes. In the helically symmetric limit, heliacs have been found to have very favorable properties as fusion machines. It is shown in the paper that, thanks to the built-in flexibility of the machines, a thorough and. complementary programme can be pursued that will allow a· full characterization of the stability of Heli'ac plasmas.
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