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Analysis of stochastic particle behavior in a magnetic island due to electrostatic drift waves

Technical Report:

Abstract

Stochastic particle motion in the magnetic island in the presence of electrostatic perturbations has been studied both numerically and analytically. By evaluating the K-S entropy, it was shown that particle orbits can be stochastic by the simultaneous effects of magnetostatic perturbation and electrostatic ones with amplitude which are not large enough to induce the orbit stochasticity alone. The generation of orbit stochasticity is due to the overlapping of sub-island formed by the E B drift driven by electrostatic perturbations and is consistent with Chirikov criterion. For the given perturbed energy, the wide region in the particle orbit can be stochastic by the electrostatic perturbations with adjacent resonance surfaces and successive mode numbers, rather than the single perturbation with large amplitude. The particle diffusion process was also analysed by evaluating the cummulants of particle displacement in time and it was shown that the process is basically the Gauss one and the higher order cummurants that the second one are appeared due to the spatial inhomogeneity of the local diffusion coefficient. (author).
Authors:
Nishimura, Yasutaro; Azumi, Masafumi; Yagi, Masatoshi; Hamamatsu, Kiyotaka; Tani, Keiji; [1]  Okada, Shigefumi; Goto, Seiichi
  1. Japan Atomic Energy Research Inst., Naka, Ibaraki (Japan). Naka Fusion Research Establishment
Publication Date:
Jul 01, 1993
Product Type:
Technical Report
Report Number:
JAERI-M-93-140
Reference Number:
SCA: 700340; PA: JPN-93:011140; EDB-94:016617; ERA-19:006006; NTS-94:014118; SN: 93001119356
Resource Relation:
Other Information: PBD: Jul 1993
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; TOKAMAK DEVICES; CHARGED-PARTICLE TRANSPORT; STOCHASTIC PROCESSES; PLASMA; ROTATIONAL TRANSFORM; MAGNETIC FIELDS; MAGNETIC SURFACES; MAGNETIC ISLANDS; FLUCTUATIONS; DRIFT INSTABILITY; PLASMA DRIFT; TRAJECTORIES; EQUATIONS OF MOTION; 700340; PLASMA WAVES, OSCILLATIONS, AND INSTABILITIES
OSTI ID:
10110105
Research Organizations:
Japan Atomic Energy Research Inst., Tokyo (Japan)
Country of Origin:
Japan
Language:
Japanese
Other Identifying Numbers:
Other: ON: DE94727553; TRN: JP9311140
Availability:
OSTI; NTIS; INIS
Submitting Site:
JPN
Size:
59 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Nishimura, Yasutaro, Azumi, Masafumi, Yagi, Masatoshi, Hamamatsu, Kiyotaka, Tani, Keiji, Okada, Shigefumi, and Goto, Seiichi. Analysis of stochastic particle behavior in a magnetic island due to electrostatic drift waves. Japan: N. p., 1993. Web.
Nishimura, Yasutaro, Azumi, Masafumi, Yagi, Masatoshi, Hamamatsu, Kiyotaka, Tani, Keiji, Okada, Shigefumi, & Goto, Seiichi. Analysis of stochastic particle behavior in a magnetic island due to electrostatic drift waves. Japan.
Nishimura, Yasutaro, Azumi, Masafumi, Yagi, Masatoshi, Hamamatsu, Kiyotaka, Tani, Keiji, Okada, Shigefumi, and Goto, Seiichi. 1993. "Analysis of stochastic particle behavior in a magnetic island due to electrostatic drift waves." Japan.
@misc{etde_10110105,
title = {Analysis of stochastic particle behavior in a magnetic island due to electrostatic drift waves}
author = {Nishimura, Yasutaro, Azumi, Masafumi, Yagi, Masatoshi, Hamamatsu, Kiyotaka, Tani, Keiji, Okada, Shigefumi, and Goto, Seiichi}
abstractNote = {Stochastic particle motion in the magnetic island in the presence of electrostatic perturbations has been studied both numerically and analytically. By evaluating the K-S entropy, it was shown that particle orbits can be stochastic by the simultaneous effects of magnetostatic perturbation and electrostatic ones with amplitude which are not large enough to induce the orbit stochasticity alone. The generation of orbit stochasticity is due to the overlapping of sub-island formed by the E B drift driven by electrostatic perturbations and is consistent with Chirikov criterion. For the given perturbed energy, the wide region in the particle orbit can be stochastic by the electrostatic perturbations with adjacent resonance surfaces and successive mode numbers, rather than the single perturbation with large amplitude. The particle diffusion process was also analysed by evaluating the cummulants of particle displacement in time and it was shown that the process is basically the Gauss one and the higher order cummurants that the second one are appeared due to the spatial inhomogeneity of the local diffusion coefficient. (author).}
place = {Japan}
year = {1993}
month = {Jul}
}