Fokker-Planck calculations of hot-electron formation by electron cyclotron resonance heating in the TMX-Upgrade tandem mirror

摘要: The paper studies cold plasma trapping and heating of hot electrons in mirror geometry using a time-dependent, bounce-averaged Fokker-Planck code with quasi-linear diffusion due to RF at fundamental second harmonic frequencies. With the restriction k|| = 0, models beam-controlled (spatially restricted electric fields) that will be used create thermal barriers TMX-Upgrade tandem-mirror experiment. By spatially localizing microwave beams, which are strongly absorbed single pass, mean hot-electron energy may controlled. Heating is away from midplane control anisotropy (P⊥/P|| ). For given magnetic field cold-plasma source temperature Ts, parameters scale quantity χ ≡ 2/nsω, where field, ns density, ω frequency.