摘要:

It is well known that the average favorable magnetic curvature of a tokamak is stabilizing with respect to pressure‐driven magnetohydrodynamic instabilities at low beta and that self‐stabilization occurs at finite beta in the so‐called second stability regime. Here it is self‐consistently investigated how these two effects, viz., the mean magnetic well and the self‐stabilization, influence the energy confinement time in a tokamak, with the use of the ballooning mode transport model proposed by Connor, Taylor, and Turner [Nucl. Fusion24, 642 (1984)].

ISSN:0031-9171    

DOI:10.1063/1.866570

出版商:AIP    

年代:1988

数据来源: AIP

摘要:

If a toroidal plasma has arbitrary nested magnetic flux surfaces and a moving plasma–vacuum interface, then any helicity injected by modulating the magnetic fields is simply consumed by an increase in helicity dissipation due to the modulated fields.

ISSN:0031-9171    

DOI:10.1063/1.866571

出版商:AIP    

年代:1988

数据来源: AIP

摘要:

Shoucri and Storey [Phys. Fluids29, 262 (1986)] have used a Vlasov code to follow the motion of a bunch of fast electrons through an isotropic plasma. The bunch sheds a train of oscillations. It is shown that the observed wavelength of this train follows from a calculation of the frequency of the fastest growing bump‐on‐tail instability mode in the bunch region.

ISSN:0031-9171    

DOI:10.1063/1.866572

出版商:AIP    

年代:1988

数据来源: AIP