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Title: Double-Null Divertor Design for JT-60SU, A 10-MA Class Long-Pulse Tokamak

Abstract

The design of a double-null divertor for use in JT-60SU is presented. The free-boundary equilibrium code EFIT is used to establish a symmetric highly triangular double-null plasma shape. The baffle shapes are highly contoured to match the equilibrium, with the plasma-facing surfaces intersecting the flux surfaces at steep angles in the regions of high heat flux. These contoured surfaces also provide a tightly baffled design with small-aperture pumping gaps near both the inner and outer divertor strike points. The gaps provide adequate throughput of D{sub 2} gas for active control of impurity entrainment at reasonable pressures. The structural design is shown to be consistent with both forces from disruptions and thermal stress during vacuum vessel bakeout.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2];  [2];  [2]
  1. General Atomics (United States)
  2. Japan Atomic Energy Research Institute (Japan)
Publication Date:
OSTI Identifier:
20845776
Resource Type:
Journal Article
Journal Name:
Fusion Science and Technology
Additional Journal Information:
Journal Volume: 39; Journal Issue: 1; Other Information: Copyright (c) 2006 American Nuclear Society (ANS), United States, All rights reserved. http://epubs.ans.org/; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1536-1055
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; APERTURES; CONTAINERS; CONTROL; DESIGN; DIVERTORS; EQUILIBRIUM; FIRST WALL; HEAT FLUX; JT-60U TOKAMAK; MAGNETIC SURFACES; PLASMA; PLASMA IMPURITIES; PULSES; PUMPING; SURFACES; THERMAL STRESSES

Citation Formats

West, W P, Friend, M E, Baxi, C B, Humphreys, D A, Leuer, J A, Petrie, T W, Reis, E E, Ishida, S, Kurita, G, Neyatani, Y, and Sakasai, A. Double-Null Divertor Design for JT-60SU, A 10-MA Class Long-Pulse Tokamak. United States: N. p., 2001. Web.
West, W P, Friend, M E, Baxi, C B, Humphreys, D A, Leuer, J A, Petrie, T W, Reis, E E, Ishida, S, Kurita, G, Neyatani, Y, & Sakasai, A. Double-Null Divertor Design for JT-60SU, A 10-MA Class Long-Pulse Tokamak. United States.
West, W P, Friend, M E, Baxi, C B, Humphreys, D A, Leuer, J A, Petrie, T W, Reis, E E, Ishida, S, Kurita, G, Neyatani, Y, and Sakasai, A. 2001. "Double-Null Divertor Design for JT-60SU, A 10-MA Class Long-Pulse Tokamak". United States.
@article{osti_20845776,
title = {Double-Null Divertor Design for JT-60SU, A 10-MA Class Long-Pulse Tokamak},
author = {West, W P and Friend, M E and Baxi, C B and Humphreys, D A and Leuer, J A and Petrie, T W and Reis, E E and Ishida, S and Kurita, G and Neyatani, Y and Sakasai, A},
abstractNote = {The design of a double-null divertor for use in JT-60SU is presented. The free-boundary equilibrium code EFIT is used to establish a symmetric highly triangular double-null plasma shape. The baffle shapes are highly contoured to match the equilibrium, with the plasma-facing surfaces intersecting the flux surfaces at steep angles in the regions of high heat flux. These contoured surfaces also provide a tightly baffled design with small-aperture pumping gaps near both the inner and outer divertor strike points. The gaps provide adequate throughput of D{sub 2} gas for active control of impurity entrainment at reasonable pressures. The structural design is shown to be consistent with both forces from disruptions and thermal stress during vacuum vessel bakeout.},
doi = {},
url = {https://www.osti.gov/biblio/20845776}, journal = {Fusion Science and Technology},
issn = {1536-1055},
number = 1,
volume = 39,
place = {United States},
year = {Mon Jan 15 00:00:00 EST 2001},
month = {Mon Jan 15 00:00:00 EST 2001}
}