FiniteLarmorradius stabilization of the m 2 instability in the ISAR T1B highbeta stellarator
Abstract
Current knowledge concerning finiteLarmorradius (FLR) stabilization for rotating theta pinches is summarized, and it is shown how experimental parameters can be changed in order to determine stability limits. Results are reported for experiments conducted over a wide range of plasma parameters in a toroidal highbeta stellarator using deuterium or hydrogen as the filling gas and capacitor bank energy of 0.5 or 1.5 MJ. The experimentally determined stability limit for the m 2 mode is discussed, and a semiempirical formula is derived for predicting the limit of FLR stabilization in future experiments. It is concluded that FLR stabilization can be tested in presentday toroidal highbeta stellarators essentially by increasing the filling pressure above the value employed in the usual hot thetapinch regime.
 Publication:

Nuclear Fusion
 Pub Date:
 February 1977
 Bibcode:
 1977NucFu..17....3N
 Keywords:

 Gyrostabilizers;
 Larmor Precession;
 Magnetohydrodynamic Stability;
 Plasma Control;
 Stellarators;
 Theta Pinch;
 Toroidal Plasmas;
 Boundary Value Problems;
 Ion Cyclotron Radiation;
 Ion Temperature;
 Nuclear Reactors;
 Plasma Lifetime;
 Plasma Radiation;
 Vlasov Equations;
 Plasma Physics