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Title: Energy confinement studies in the tandem mirror experiment (TMX): Power balance

Abstract

The power balance in the Tandem Mirror Experiment (TMX) is studied for several days of operation. Between them, these days typified the operating range of TMX. Examining the power balance on axis, it is found that 60% to 100% of the power is carried to the end walls by escaping central-cell ions. Globally, these calculations account for 70% to 100% of the input power on each of the days studied. Based upon the power balance, the energy confinement times of the particle species are calculated. The end-cell ion energy confinement time is similar to that achieved in the 2XIIB single-cell magnetic mirror experiment, whereas the electron energy confinement in TMX was 10 to 100 times better. The central-cell ion energy confinement in the central flux tube was determined by axial particle loss. At the central-cell plasma-edge radial particle transport and charge exchange with the fueling gas are important processes.

Authors:
; ;
Publication Date:
Research Org.:
Lawrence Livermore National Laboratory, University of California, Livermore, California 94550
OSTI Identifier:
5890556
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Journal Article
Journal Name:
Phys. Fluids; (United States)
Additional Journal Information:
Journal Volume: 26:7
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; TMX DEVICES; ENERGY BALANCE; OPERATION; ELECTRON TEMPERATURE; ION TEMPERATURE; PLASMA CONFINEMENT; PLASMA DENSITY; PLASMA DIAGNOSTICS; POWER; CONFINEMENT; MAGNETIC MIRRORS; OPEN PLASMA DEVICES; THERMONUCLEAR DEVICES; 700101* - Fusion Energy- Plasma Research- Confinement, Heating, & Production; 700102 - Fusion Energy- Plasma Research- Diagnostics

Citation Formats

Grubb, D.P., Allen, S.L., and Casper, T.A. Energy confinement studies in the tandem mirror experiment (TMX): Power balance. United States: N. p., 1983. Web. doi:10.1063/1.864347.
Grubb, D.P., Allen, S.L., & Casper, T.A. Energy confinement studies in the tandem mirror experiment (TMX): Power balance. United States. doi:10.1063/1.864347.
Grubb, D.P., Allen, S.L., and Casper, T.A. Fri . "Energy confinement studies in the tandem mirror experiment (TMX): Power balance". United States. doi:10.1063/1.864347.
@article{osti_5890556,
title = {Energy confinement studies in the tandem mirror experiment (TMX): Power balance},
author = {Grubb, D.P. and Allen, S.L. and Casper, T.A.},
abstractNote = {The power balance in the Tandem Mirror Experiment (TMX) is studied for several days of operation. Between them, these days typified the operating range of TMX. Examining the power balance on axis, it is found that 60% to 100% of the power is carried to the end walls by escaping central-cell ions. Globally, these calculations account for 70% to 100% of the input power on each of the days studied. Based upon the power balance, the energy confinement times of the particle species are calculated. The end-cell ion energy confinement time is similar to that achieved in the 2XIIB single-cell magnetic mirror experiment, whereas the electron energy confinement in TMX was 10 to 100 times better. The central-cell ion energy confinement in the central flux tube was determined by axial particle loss. At the central-cell plasma-edge radial particle transport and charge exchange with the fueling gas are important processes.},
doi = {10.1063/1.864347},
journal = {Phys. Fluids; (United States)},
number = ,
volume = 26:7,
place = {United States},
year = {1983},
month = {7}
}