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Title: Confinement of Nonneutral Plasmas in the Prototype Ring Trap Device

Abstract

Recently, an internal-ring device named Proto-RT (Prototype Ring Trap) was constructed at University of Tokyo, and experiments on the device have been intensively conducted. The main goal of Proto-RT is to explore an innovative method to attain a plasma equilibrium with extremely high-{beta} ({beta} > 1) in a toroidal geometry using non-neutral condition. At the first series of the experiments, pure electron plasmas (n{sub e} {similar_to} 10{sup 13} m{sup {minus}3}) have been successfully confined inside a separatrix. No disruption is so far observed. The confinement time of the electron plasmas is of order 0.1 ms for an X point configuration. The non-neutrality of {triangle}n{sub e} {similar_to} 10{sup 13} m{sup -3} is already beyond the critical value which is required to produce enough self-electric field E in non-neutral plasmas with n{sub 0} {similar_to} 10{sup 19} m{sup -3}, causing a strong E x B flow thoroughly over the plasmas where the hydrodynamic pressure of the flow is predicted to balance with the thermal pressure of the plasmas.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
University of Tokyo, Department of Advanced Energy, Graduate School of Frontier Sciences, Tokyo (JP)
Sponsoring Org.:
none (US)
OSTI Identifier:
783955
Report Number(s):
ISBN 1-56396-913-0; ISSN 0094-243X; CODEN APCPCS
ISBN 1-56396-913-0; ISSN 0094-243X; CODEN APCPCS; TRN: US0104159
Resource Type:
Conference
Resource Relation:
Conference: 1999 Workshop on Non-Neutral Plasmas, Princeton, NJ (US), 08/02/1999--08/05/1999; Other Information: PBD: 31 Dec 1999
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; PLASMA CONFINEMENT; CONFINEMENT TIME; ELECTRONS; HYDRODYNAMICS; INTERNAL RING DEVICES; PLASMA WAVES; TOROIDAL CONFIGURATION; TRAPS

Citation Formats

Himura, Haruhiko, Yoshida, Zensho, Nakashima, Chihiro, Hidekazu Kakuno, Junji Morikawa, Tahara, Shigeru, and Shibayama, Norihisa. Confinement of Nonneutral Plasmas in the Prototype Ring Trap Device. United States: N. p., 1999. Web.
Himura, Haruhiko, Yoshida, Zensho, Nakashima, Chihiro, Hidekazu Kakuno, Junji Morikawa, Tahara, Shigeru, & Shibayama, Norihisa. Confinement of Nonneutral Plasmas in the Prototype Ring Trap Device. United States.
Himura, Haruhiko, Yoshida, Zensho, Nakashima, Chihiro, Hidekazu Kakuno, Junji Morikawa, Tahara, Shigeru, and Shibayama, Norihisa. 1999. "Confinement of Nonneutral Plasmas in the Prototype Ring Trap Device". United States.
@article{osti_783955,
title = {Confinement of Nonneutral Plasmas in the Prototype Ring Trap Device},
author = {Himura, Haruhiko and Yoshida, Zensho and Nakashima, Chihiro and Hidekazu Kakuno, Junji Morikawa and Tahara, Shigeru and Shibayama, Norihisa},
abstractNote = {Recently, an internal-ring device named Proto-RT (Prototype Ring Trap) was constructed at University of Tokyo, and experiments on the device have been intensively conducted. The main goal of Proto-RT is to explore an innovative method to attain a plasma equilibrium with extremely high-{beta} ({beta} > 1) in a toroidal geometry using non-neutral condition. At the first series of the experiments, pure electron plasmas (n{sub e} {similar_to} 10{sup 13} m{sup {minus}3}) have been successfully confined inside a separatrix. No disruption is so far observed. The confinement time of the electron plasmas is of order 0.1 ms for an X point configuration. The non-neutrality of {triangle}n{sub e} {similar_to} 10{sup 13} m{sup -3} is already beyond the critical value which is required to produce enough self-electric field E in non-neutral plasmas with n{sub 0} {similar_to} 10{sup 19} m{sup -3}, causing a strong E x B flow thoroughly over the plasmas where the hydrodynamic pressure of the flow is predicted to balance with the thermal pressure of the plasmas.},
doi = {},
url = {https://www.osti.gov/biblio/783955}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Dec 31 00:00:00 EST 1999},
month = {Fri Dec 31 00:00:00 EST 1999}
}

Conference:
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