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Title: Consideration of neutral beam prompt loss in the design of a tokamak helicon antenna

Abstract

Neutral beam prompt losses (injected neutrals that ionize such that their first poloidal transit intersects with the wall) can put appreciable power on the outer wall of tokamaks, and this power may damage the wall or other internal components. These prompt losses are simulated including a protruding helicon antenna installation in the DIII-D tokamak and it is determined that 160 kW of power will impact the antenna during the injection of a particular neutral beam. Protective graphite tiles are designed in response to this modeling and the wall shape of the installed antenna is precisely measured to improve the accuracy of these calculations. Initial experiments con rm that the antenna component temperature increases according to the amount of neutral beam energy injected into the plasma. Incorporating neutral beam prompt loss considerations into the design of this in-vessel component serves to ensure that adequate protection or cooling is provided.

Authors:
 [1];  [1];  [1];  [1]
  1. General Atomics, San Diego, CA (United States)
Publication Date:
Research Org.:
General Atomics, San Diego, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24); European Consortium for the Development of Fusion Energy (EUROfusion)
OSTI Identifier:
1422505
Alternate Identifier(s):
OSTI ID: 1371877; OSTI ID: 1399145
Report Number(s):
DOE-GA-54698
Journal ID: ISSN 0920-3796; PII: S0920379616305269
Grant/Contract Number:
FC02-04ER54698
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Fusion Engineering and Design
Additional Journal Information:
Journal Volume: 112; Journal Issue: C; Related Information: D.C. Pace, M.A. Van Zeeland, B. Fishler, and C. Murphy, "Consideration of neutral beam prompt loss in the design of a tokamak helicon antenna," Fus Eng Des 112, 14-20 (2016); Journal ID: ISSN 0920-3796
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; neutral beam; prompt loss; helicon antenna; thermal design

Citation Formats

Pace, D. C., Van Zeeland, M. A., Fishler, B., and Murphy, C.. Consideration of neutral beam prompt loss in the design of a tokamak helicon antenna. United States: N. p., 2016. Web. doi:10.1016/j.fusengdes.2016.07.018.
Pace, D. C., Van Zeeland, M. A., Fishler, B., & Murphy, C.. Consideration of neutral beam prompt loss in the design of a tokamak helicon antenna. United States. doi:10.1016/j.fusengdes.2016.07.018.
Pace, D. C., Van Zeeland, M. A., Fishler, B., and Murphy, C.. Tue . "Consideration of neutral beam prompt loss in the design of a tokamak helicon antenna". United States. doi:10.1016/j.fusengdes.2016.07.018. https://www.osti.gov/servlets/purl/1422505.
@article{osti_1422505,
title = {Consideration of neutral beam prompt loss in the design of a tokamak helicon antenna},
author = {Pace, D. C. and Van Zeeland, M. A. and Fishler, B. and Murphy, C.},
abstractNote = {Neutral beam prompt losses (injected neutrals that ionize such that their first poloidal transit intersects with the wall) can put appreciable power on the outer wall of tokamaks, and this power may damage the wall or other internal components. These prompt losses are simulated including a protruding helicon antenna installation in the DIII-D tokamak and it is determined that 160 kW of power will impact the antenna during the injection of a particular neutral beam. Protective graphite tiles are designed in response to this modeling and the wall shape of the installed antenna is precisely measured to improve the accuracy of these calculations. Initial experiments con rm that the antenna component temperature increases according to the amount of neutral beam energy injected into the plasma. Incorporating neutral beam prompt loss considerations into the design of this in-vessel component serves to ensure that adequate protection or cooling is provided.},
doi = {10.1016/j.fusengdes.2016.07.018},
journal = {Fusion Engineering and Design},
number = C,
volume = 112,
place = {United States},
year = {Tue Aug 02 00:00:00 EDT 2016},
month = {Tue Aug 02 00:00:00 EDT 2016}
}

Journal Article:
Free Publicly Available Full Text
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