Ponderomotive Barrier as a Maxwell Demon

Dodin, I.Y. ; Fisch, N.J. ; Rax, J.M.

Princeton University. Plasma Physics Laboratory.

关键词: Acceleration;    Heating;    Magnetic Fields;    70 Plasma Physics And Fusion Technology;    Ponderomotive Force;   

DOI  :  10.2172/827931
RP-ID  :  PPPL-3949Rev
RP-ID  :  AC02-76CH03073
RP-ID  :  827931

美国|英语

来源: UNT Digital Library

【 摘 要 】

The possibility of efficient ponderomotive current drive in a magnetized plasma was reported recently in [Phys. Rev. Lett. 91, 205004 (2003)]. Precise limitations on the efficiency are now given through a comprehensive analytical and numerical study of single-particle dynamics under the action of a cyclotron-resonant rf drive in various field configurations. Expressions for the particle energy gain and acceleration along the dc magnetic field are obtained. The fundamental correlation between the two effects is described. A second fundamental quantity, namely the ratio of the potential barrier to the energy gain, can be changed by altering the field configuration. The asymmetric ponderomotive current drive effect can be optimized by minimizing the transverse heating.