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ICRF operation with improved antennas in ASDEX Upgrade with W wall

V Bobkov, M Balden, R Bilato, F Braun, R Dux, A Herrmann, H Faugel, H Fünfgelder, L Giannone, A Kallenbach, et al. (2013) NUCLEAR FUSION. 53(9).
abstract
Experiments with boron-coated side limiters of two antennas operated together in 2012 showed that the side limiters are responsible for more than half of the increased W content in the plasma. Together with the contribution from the other limiter tiles, not replaced in 2012, the limiters account for at least two thirds of the W content. A modified test two-strap ion cyclotron range of frequency (ICRF) antennas in ASDEX Upgrade with broad limiters and narrow straps has shown an improved operation with full W wall in 2011/2012 campaigns with up to a 40% lower rise of W concentration allowing more stable operation at low deuterium gas injection rate. Limiter spectroscopy measurements indicate up to a 40% reduction of the rise of the W sputtering yield during ICRF power, measured under the assumption of negligible influence of geometry variations and reflections on the measurements. The boron limiters on two antennas together with the improved broad-limiter antenna allowed a successful ICRF operation in 2012. As a part of long-term strategy of antenna design development, two three-strap antennas with phase and power balance control for reduction of E-parallel to| are planned for installation in the future.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
DESIGN
journal title
NUCLEAR FUSION
volume
53
issue
9
article number
093018
pages
9 pages
Web of Science type
Article
Web of Science id
000324160400020
JCR category
PHYSICS, FLUIDS & PLASMAS
JCR impact factor
3.243 (2013)
JCR rank
3/31 (2013)
JCR quartile
1 (2013)
ISSN
0029-5515
DOI
10.1088/0029-5515/53/9/093018
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
4240893
handle
http://hdl.handle.net/1854/LU-4240893
date created
2014-01-21 14:45:15
date last changed
2016-12-21 15:42:09
@article{4240893,
  abstract     = {Experiments with boron-coated side limiters of two antennas operated together in 2012 showed that the side limiters are responsible for more than half of the increased W content in the plasma. Together with the contribution from the other limiter tiles, not replaced in 2012, the limiters account for at least two thirds of the W content. A modified test two-strap ion cyclotron range of frequency (ICRF) antennas in ASDEX Upgrade with broad limiters and narrow straps has shown an improved operation with full W wall in 2011/2012 campaigns with up to a 40\% lower rise of W concentration allowing more stable operation at low deuterium gas injection rate. Limiter spectroscopy measurements indicate up to a 40\% reduction of the rise of the W sputtering yield during ICRF power, measured under the assumption of negligible influence of geometry variations and reflections on the measurements. The boron limiters on two antennas together with the improved broad-limiter antenna allowed a successful ICRF operation in 2012. As a part of long-term strategy of antenna design development, two three-strap antennas with phase and power balance control for reduction of E-parallel to| are planned for installation in the future.},
  articleno    = {093018},
  author       = {Bobkov, V and Balden, M and Bilato, R and Braun, F and Dux, R and Herrmann, A and Faugel, H and F{\"u}nfgelder, H and Giannone, L and Kallenbach, A and Maier, H and M{\"u}ller, HW and Neu, R and Noterdaeme, Jean-Marie and Rohde, T and Tsujii, N and Zeus, F and Zohm, H},
  issn         = {0029-5515},
  journal      = {NUCLEAR FUSION},
  keyword      = {DESIGN},
  language     = {eng},
  number       = {9},
  pages        = {9},
  title        = {ICRF operation with improved antennas in ASDEX Upgrade with W wall},
  url          = {http://dx.doi.org/10.1088/0029-5515/53/9/093018},
  volume       = {53},
  year         = {2013},
}

Chicago
Bobkov, V, M Balden, R Bilato, F Braun, R Dux, A Herrmann, H Faugel, et al. 2013. “ICRF Operation with Improved Antennas in ASDEX Upgrade with W Wall.” Nuclear Fusion 53 (9).
APA
Bobkov, V, Balden, M., Bilato, R., Braun, F., Dux, R., Herrmann, A., Faugel, H., et al. (2013). ICRF operation with improved antennas in ASDEX Upgrade with W wall. NUCLEAR FUSION, 53(9).
Vancouver
1.
Bobkov V, Balden M, Bilato R, Braun F, Dux R, Herrmann A, et al. ICRF operation with improved antennas in ASDEX Upgrade with W wall. NUCLEAR FUSION. 2013;53(9).
MLA
Bobkov, V, M Balden, R Bilato, et al. “ICRF Operation with Improved Antennas in ASDEX Upgrade with W Wall.” NUCLEAR FUSION 53.9 (2013): n. pag. Print.