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In modelling plasma it is important to take into account the plasma deformability that can sensibly increase the growth rate. In this report, the plasma is simulated by a set of toroidal circuits whose current distribution reproduces the magnetic flux surfaces of the plasma. In IGNITOR the vertical instability growth rate is higher for deformable than for rigid plasma, and proportional and derivative control feedback can stabilise vertical modes in a wide range of gain parameters. The dependence of the growth rate and of the safety factor, q, on plasma finite displacement is also given.

Additional information

Authors: RITA C, ENEA, Centro Ricerche Energia Frascati, Roma (IT);ROCCELLA M, ENEA, Centro Ricerche Energia Frascati, Roma (IT);GRAZIADEI S, ENEA, Centro Ricerche Energia Frascati, Roma (IT);NASSI M, ENEA, Settore Fusione, Torino (IT)
Bibliographic Reference: Paper presented: 18th Symposium on Fusion Technology, Karlsruhe (DE), August 22-26, 1994
Availability: Available from (1) as Paper EN 38629 ORA
Record Number: 199411313 / Last updated on: 1994-12-06
Original language: en
Available languages: en