Open AccessTHE EFFECT OF FINITE ION LARMOR RADIUS ON THE EIGENMODES OF DRIFT WAVE
Author(s) -
Zhang Cheng-Fu
Publication year - 1980
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.29.778
Subject(s) - gyroradius , physics , eigenvalues and eigenvectors , mode (computer interface) , radius , wavelength , ion , instability , stability (learning theory) , wave equation , quantum electrodynamics , classical mechanics , quantum mechanics , computer security , machine learning , computer science , operating system
In this paper, it is shown that in the practical case of Ti≠ 0, for short wavelength modes (i.e. Sy≡ky2ρi2≥1), the usually adopted eigen-equation of drift wave is theoretically inconsistent, consequently, the inference that "The universal mode in fact, is stable" is also inappropriate. Under the condition of low magnetic field shear (Ls/rn >>[2Timi/Teme]1/2), a consistent eigen-equation of drift wave is deduced, which is valid for Sy≥1 as well as for Syi2), it can be shown that there is no unstable mode (i.e. there is no solution with γ>0). But if the correction term is taken into account, no definite conclusion about its stability can be obtained as yet.