Impact of a movable limiter on the global wall recycling in TRIAM-1M

M. Sakamoto, M. Ogawa, K. Takaki, H. Zushi, K. Nakashima, N. Maezono, T. Sugata, Y. Nakashima, Y. Higashizono, Y. Kubota, A. Higashijima, H. Nakashima, S. Kawasaki, A. Iyomasa, Makoto Hasegawa, Hiroshi Idei, Kazuaki Hanada, Kazuo Nakamura, K. N. Sato

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In TRIAM-1M, the influence of the local structure of the first wall on the global wall recycling has been studied using the ML with good cooling capability. No wall saturation was observed in the 5 h 16 min discharge with the ML, since particle release was suppressed by less temperature rise of the main chamber. The global wall pumping rate without the ML, ~8.6 x 10 16 atoms m -2 s -1 , is 3.6 times higher than that of the long duration discharge without the ML. The temperature rise in the wall is attributed to the transition of the wall role from the particle sink to the source. The co-deposition of hydrogen with Mo is a key for the wall role of the particle sink. No clear difference of the growth rate of Mo deposits on the viewing window located from the limiter surface between with and without the ML. The growth rate is from ~2 x 10 -4 nm/s to ~8 x 10 -4 nm/s. The toroidal structure of hydrogen recycling changes significantly near at the ML. However, integration of H intensity with and without the ML over the whole toroidal length is about the same within 3% , which is less than the error, i.e. 15%.

Original languageEnglish
Title of host publication32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts
Pages1930-1933
Number of pages4
Publication statusPublished - Dec 1 2005
Event32nd European Physical Society Conference on Plasma Physics and Controlled Fusion combined with the 8th International Workshop on Fast Ignition of Fusion Targets - Tarragona, Spain
Duration: Jun 27 2005Jul 1 2005

Publication series

Name32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts
Volume3

Other

Other32nd European Physical Society Conference on Plasma Physics and Controlled Fusion combined with the 8th International Workshop on Fast Ignition of Fusion Targets
CountrySpain
CityTarragona
Period6/27/057/1/05

Fingerprint

recycling
sinks
hydrogen
pumping
chambers
deposits
saturation
cooling
temperature
atoms

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

Sakamoto, M., Ogawa, M., Takaki, K., Zushi, H., Nakashima, K., Maezono, N., ... Sato, K. N. (2005). Impact of a movable limiter on the global wall recycling in TRIAM-1M. In 32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts (pp. 1930-1933). (32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts; Vol. 3).

Impact of a movable limiter on the global wall recycling in TRIAM-1M. / Sakamoto, M.; Ogawa, M.; Takaki, K.; Zushi, H.; Nakashima, K.; Maezono, N.; Sugata, T.; Nakashima, Y.; Higashizono, Y.; Kubota, Y.; Higashijima, A.; Nakashima, H.; Kawasaki, S.; Iyomasa, A.; Hasegawa, Makoto; Idei, Hiroshi; Hanada, Kazuaki; Nakamura, Kazuo; Sato, K. N.

32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts. 2005. p. 1930-1933 (32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts; Vol. 3).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Sakamoto, M, Ogawa, M, Takaki, K, Zushi, H, Nakashima, K, Maezono, N, Sugata, T, Nakashima, Y, Higashizono, Y, Kubota, Y, Higashijima, A, Nakashima, H, Kawasaki, S, Iyomasa, A, Hasegawa, M, Idei, H, Hanada, K, Nakamura, K & Sato, KN 2005, Impact of a movable limiter on the global wall recycling in TRIAM-1M. in 32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts. 32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts, vol. 3, pp. 1930-1933, 32nd European Physical Society Conference on Plasma Physics and Controlled Fusion combined with the 8th International Workshop on Fast Ignition of Fusion Targets, Tarragona, Spain, 6/27/05.
Sakamoto M, Ogawa M, Takaki K, Zushi H, Nakashima K, Maezono N et al. Impact of a movable limiter on the global wall recycling in TRIAM-1M. In 32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts. 2005. p. 1930-1933. (32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts).
Sakamoto, M. ; Ogawa, M. ; Takaki, K. ; Zushi, H. ; Nakashima, K. ; Maezono, N. ; Sugata, T. ; Nakashima, Y. ; Higashizono, Y. ; Kubota, Y. ; Higashijima, A. ; Nakashima, H. ; Kawasaki, S. ; Iyomasa, A. ; Hasegawa, Makoto ; Idei, Hiroshi ; Hanada, Kazuaki ; Nakamura, Kazuo ; Sato, K. N. / Impact of a movable limiter on the global wall recycling in TRIAM-1M. 32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts. 2005. pp. 1930-1933 (32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts).
@inproceedings{cc2f52c65db4484e8867be7b5cc9e1f0,
title = "Impact of a movable limiter on the global wall recycling in TRIAM-1M",
abstract = "In TRIAM-1M, the influence of the local structure of the first wall on the global wall recycling has been studied using the ML with good cooling capability. No wall saturation was observed in the 5 h 16 min discharge with the ML, since particle release was suppressed by less temperature rise of the main chamber. The global wall pumping rate without the ML, ~8.6 x 10 16 atoms m -2 s -1 , is 3.6 times higher than that of the long duration discharge without the ML. The temperature rise in the wall is attributed to the transition of the wall role from the particle sink to the source. The co-deposition of hydrogen with Mo is a key for the wall role of the particle sink. No clear difference of the growth rate of Mo deposits on the viewing window located from the limiter surface between with and without the ML. The growth rate is from ~2 x 10 -4 nm/s to ~8 x 10 -4 nm/s. The toroidal structure of hydrogen recycling changes significantly near at the ML. However, integration of H intensity with and without the ML over the whole toroidal length is about the same within 3{\%} , which is less than the error, i.e. 15{\%}.",
author = "M. Sakamoto and M. Ogawa and K. Takaki and H. Zushi and K. Nakashima and N. Maezono and T. Sugata and Y. Nakashima and Y. Higashizono and Y. Kubota and A. Higashijima and H. Nakashima and S. Kawasaki and A. Iyomasa and Makoto Hasegawa and Hiroshi Idei and Kazuaki Hanada and Kazuo Nakamura and Sato, {K. N.}",
year = "2005",
month = "12",
day = "1",
language = "English",
isbn = "9781622763320",
series = "32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts",
pages = "1930--1933",
booktitle = "32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts",

}

TY - GEN

T1 - Impact of a movable limiter on the global wall recycling in TRIAM-1M

AU - Sakamoto, M.

AU - Ogawa, M.

AU - Takaki, K.

AU - Zushi, H.

AU - Nakashima, K.

AU - Maezono, N.

AU - Sugata, T.

AU - Nakashima, Y.

AU - Higashizono, Y.

AU - Kubota, Y.

AU - Higashijima, A.

AU - Nakashima, H.

AU - Kawasaki, S.

AU - Iyomasa, A.

AU - Hasegawa, Makoto

AU - Idei, Hiroshi

AU - Hanada, Kazuaki

AU - Nakamura, Kazuo

AU - Sato, K. N.

PY - 2005/12/1

Y1 - 2005/12/1

N2 - In TRIAM-1M, the influence of the local structure of the first wall on the global wall recycling has been studied using the ML with good cooling capability. No wall saturation was observed in the 5 h 16 min discharge with the ML, since particle release was suppressed by less temperature rise of the main chamber. The global wall pumping rate without the ML, ~8.6 x 10 16 atoms m -2 s -1 , is 3.6 times higher than that of the long duration discharge without the ML. The temperature rise in the wall is attributed to the transition of the wall role from the particle sink to the source. The co-deposition of hydrogen with Mo is a key for the wall role of the particle sink. No clear difference of the growth rate of Mo deposits on the viewing window located from the limiter surface between with and without the ML. The growth rate is from ~2 x 10 -4 nm/s to ~8 x 10 -4 nm/s. The toroidal structure of hydrogen recycling changes significantly near at the ML. However, integration of H intensity with and without the ML over the whole toroidal length is about the same within 3% , which is less than the error, i.e. 15%.

AB - In TRIAM-1M, the influence of the local structure of the first wall on the global wall recycling has been studied using the ML with good cooling capability. No wall saturation was observed in the 5 h 16 min discharge with the ML, since particle release was suppressed by less temperature rise of the main chamber. The global wall pumping rate without the ML, ~8.6 x 10 16 atoms m -2 s -1 , is 3.6 times higher than that of the long duration discharge without the ML. The temperature rise in the wall is attributed to the transition of the wall role from the particle sink to the source. The co-deposition of hydrogen with Mo is a key for the wall role of the particle sink. No clear difference of the growth rate of Mo deposits on the viewing window located from the limiter surface between with and without the ML. The growth rate is from ~2 x 10 -4 nm/s to ~8 x 10 -4 nm/s. The toroidal structure of hydrogen recycling changes significantly near at the ML. However, integration of H intensity with and without the ML over the whole toroidal length is about the same within 3% , which is less than the error, i.e. 15%.

UR - http://www.scopus.com/inward/record.url?scp=84873373367&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84873373367&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:84873373367

SN - 9781622763320

T3 - 32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts

SP - 1930

EP - 1933

BT - 32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts

ER -