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Title: Implementation of vertically asymmetric toroidal-field ripple for beam heating of tokamak reactor plasmas

Abstract

The neutral-beam energy required for adequate penetration of tokamak plasmas of high opacity can be reduced by a large factor if the beam is injected vertically into a region of large TF (toroidal-field) ripple. Energetic ions are trapped in local magnetic wells and drift vertically toward the midplane (z = 0). If the ripple is made very small on the opposite side of the midplane, drifting ions are detrapped and thermalized in the central plasma region. This paper discusses design considerations for establishing the required vertically asymmetric ripple. Examples are given of special TF-coil configurations, and of the use of auxiliary coil windings to create the prescribed ripple profiles.

Authors:
; ; ;
Publication Date:
Research Org.:
Princeton Univ., N.J. (USA). Plasma Physics Lab.
OSTI Identifier:
7346491
Report Number(s):
PPPL-1292; CONF-760935-8
TRN: 77-000985
DOE Contract Number:  
E(11-1)-3073
Resource Type:
Conference
Resource Relation:
Conference: 2. topical meeting on the technology of controlled nuclear fusion, Richland, WA, USA, 21 Sep 1976
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; TOKAMAK TYPE REACTORS; MAGNETIC FIELD CONFIGURATIONS; NEUTRAL ATOM BEAM INJECTION; BEAM INJECTION HEATING; DESIGN; MAGNET COILS; BEAM INJECTION; ELECTRIC COILS; ELECTRICAL EQUIPMENT; EQUIPMENT; HEATING; PLASMA HEATING; THERMONUCLEAR REACTORS; 700202* - Fusion Power Plant Technology- Magnet Coils & Fields; 700101 - Fusion Energy- Plasma Research- Confinement, Heating, & Production

Citation Formats

Jassby, D. L., Sheffield, G. V., Towner, H. H., and Weissenburger, D. W. Implementation of vertically asymmetric toroidal-field ripple for beam heating of tokamak reactor plasmas. United States: N. p., 1976. Web.
Jassby, D. L., Sheffield, G. V., Towner, H. H., & Weissenburger, D. W. Implementation of vertically asymmetric toroidal-field ripple for beam heating of tokamak reactor plasmas. United States.
Jassby, D. L., Sheffield, G. V., Towner, H. H., and Weissenburger, D. W. 1976. "Implementation of vertically asymmetric toroidal-field ripple for beam heating of tokamak reactor plasmas". United States. https://www.osti.gov/servlets/purl/7346491.
@article{osti_7346491,
title = {Implementation of vertically asymmetric toroidal-field ripple for beam heating of tokamak reactor plasmas},
author = {Jassby, D. L. and Sheffield, G. V. and Towner, H. H. and Weissenburger, D. W.},
abstractNote = {The neutral-beam energy required for adequate penetration of tokamak plasmas of high opacity can be reduced by a large factor if the beam is injected vertically into a region of large TF (toroidal-field) ripple. Energetic ions are trapped in local magnetic wells and drift vertically toward the midplane (z = 0). If the ripple is made very small on the opposite side of the midplane, drifting ions are detrapped and thermalized in the central plasma region. This paper discusses design considerations for establishing the required vertically asymmetric ripple. Examples are given of special TF-coil configurations, and of the use of auxiliary coil windings to create the prescribed ripple profiles.},
doi = {},
url = {https://www.osti.gov/biblio/7346491}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Oct 01 00:00:00 EDT 1976},
month = {Fri Oct 01 00:00:00 EDT 1976}
}

Conference:
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