Edge transport barrier formation in compact helical system

S. Okamura, T. Minami, T. Oishi, C. Suzuki, K. Ida, M. Isobe, Y. Yoshimura, K. Nagaoka, K. Toi, akihide fujisawa, T. Akiyama, H. Iguchi, R. Ikeda, S. Kado, K. Matsuoka, H. Matsushita, Kazuo Nakamura, H. Nakano, S. Nishimura, M. NishiuraS. Ohshima, A. Shimizu, S. Takagi, C. Takahashi, M. Takeuchi, M. Yoshinuma

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The edge transport barrier (ETB) for particle transport is formed in the neutral beam (NB) heated hydrogen discharges in compact helical system (CHS). The transition to the ETB formation and the back transition are controlled by the heating power. The existence of the heating power threshold is confirmed and it is roughly proportional to the density. The Hα emission signal shows a clear drop at the transition (the timescale of signal decrease is ∼1 ms for the high heating power case). The ETB formation continues for the full duration of NB injection (100 ms) with a moderate level of radiation power loss. Local density profile measurement shows increase of the edge density and the movement of the density gradient region towards the edge.

Original languageEnglish
JournalPlasma Physics and Controlled Fusion
Volume46
Issue number5 SUPPL. A
DOIs
Publication statusPublished - Jan 1 2004

Fingerprint

Heating
neutral beams
heating
beam injection
power loss
Radiation
Hydrogen
gradients
thresholds
hydrogen
radiation
profiles

All Science Journal Classification (ASJC) codes

  • Nuclear Energy and Engineering
  • Condensed Matter Physics

Cite this

Okamura, S., Minami, T., Oishi, T., Suzuki, C., Ida, K., Isobe, M., ... Yoshinuma, M. (2004). Edge transport barrier formation in compact helical system. Plasma Physics and Controlled Fusion, 46(5 SUPPL. A). https://doi.org/10.1088/0741-3335/46/5A/012

Edge transport barrier formation in compact helical system. / Okamura, S.; Minami, T.; Oishi, T.; Suzuki, C.; Ida, K.; Isobe, M.; Yoshimura, Y.; Nagaoka, K.; Toi, K.; fujisawa, akihide; Akiyama, T.; Iguchi, H.; Ikeda, R.; Kado, S.; Matsuoka, K.; Matsushita, H.; Nakamura, Kazuo; Nakano, H.; Nishimura, S.; Nishiura, M.; Ohshima, S.; Shimizu, A.; Takagi, S.; Takahashi, C.; Takeuchi, M.; Yoshinuma, M.

In: Plasma Physics and Controlled Fusion, Vol. 46, No. 5 SUPPL. A, 01.01.2004.

Research output: Contribution to journalArticle

Okamura, S, Minami, T, Oishi, T, Suzuki, C, Ida, K, Isobe, M, Yoshimura, Y, Nagaoka, K, Toi, K, fujisawa, A, Akiyama, T, Iguchi, H, Ikeda, R, Kado, S, Matsuoka, K, Matsushita, H, Nakamura, K, Nakano, H, Nishimura, S, Nishiura, M, Ohshima, S, Shimizu, A, Takagi, S, Takahashi, C, Takeuchi, M & Yoshinuma, M 2004, 'Edge transport barrier formation in compact helical system', Plasma Physics and Controlled Fusion, vol. 46, no. 5 SUPPL. A. https://doi.org/10.1088/0741-3335/46/5A/012
Okamura S, Minami T, Oishi T, Suzuki C, Ida K, Isobe M et al. Edge transport barrier formation in compact helical system. Plasma Physics and Controlled Fusion. 2004 Jan 1;46(5 SUPPL. A). https://doi.org/10.1088/0741-3335/46/5A/012
Okamura, S. ; Minami, T. ; Oishi, T. ; Suzuki, C. ; Ida, K. ; Isobe, M. ; Yoshimura, Y. ; Nagaoka, K. ; Toi, K. ; fujisawa, akihide ; Akiyama, T. ; Iguchi, H. ; Ikeda, R. ; Kado, S. ; Matsuoka, K. ; Matsushita, H. ; Nakamura, Kazuo ; Nakano, H. ; Nishimura, S. ; Nishiura, M. ; Ohshima, S. ; Shimizu, A. ; Takagi, S. ; Takahashi, C. ; Takeuchi, M. ; Yoshinuma, M. / Edge transport barrier formation in compact helical system. In: Plasma Physics and Controlled Fusion. 2004 ; Vol. 46, No. 5 SUPPL. A.
@article{1af91c0c1a3b4fa6accb09a6b9c1fcb1,
title = "Edge transport barrier formation in compact helical system",
abstract = "The edge transport barrier (ETB) for particle transport is formed in the neutral beam (NB) heated hydrogen discharges in compact helical system (CHS). The transition to the ETB formation and the back transition are controlled by the heating power. The existence of the heating power threshold is confirmed and it is roughly proportional to the density. The Hα emission signal shows a clear drop at the transition (the timescale of signal decrease is ∼1 ms for the high heating power case). The ETB formation continues for the full duration of NB injection (100 ms) with a moderate level of radiation power loss. Local density profile measurement shows increase of the edge density and the movement of the density gradient region towards the edge.",
author = "S. Okamura and T. Minami and T. Oishi and C. Suzuki and K. Ida and M. Isobe and Y. Yoshimura and K. Nagaoka and K. Toi and akihide fujisawa and T. Akiyama and H. Iguchi and R. Ikeda and S. Kado and K. Matsuoka and H. Matsushita and Kazuo Nakamura and H. Nakano and S. Nishimura and M. Nishiura and S. Ohshima and A. Shimizu and S. Takagi and C. Takahashi and M. Takeuchi and M. Yoshinuma",
year = "2004",
month = "1",
day = "1",
doi = "10.1088/0741-3335/46/5A/012",
language = "English",
volume = "46",
journal = "Plasma Physics and Controlled Fusion",
issn = "0741-3335",
publisher = "IOP Publishing Ltd.",
number = "5 SUPPL. A",

}

TY - JOUR

T1 - Edge transport barrier formation in compact helical system

AU - Okamura, S.

AU - Minami, T.

AU - Oishi, T.

AU - Suzuki, C.

AU - Ida, K.

AU - Isobe, M.

AU - Yoshimura, Y.

AU - Nagaoka, K.

AU - Toi, K.

AU - fujisawa, akihide

AU - Akiyama, T.

AU - Iguchi, H.

AU - Ikeda, R.

AU - Kado, S.

AU - Matsuoka, K.

AU - Matsushita, H.

AU - Nakamura, Kazuo

AU - Nakano, H.

AU - Nishimura, S.

AU - Nishiura, M.

AU - Ohshima, S.

AU - Shimizu, A.

AU - Takagi, S.

AU - Takahashi, C.

AU - Takeuchi, M.

AU - Yoshinuma, M.

PY - 2004/1/1

Y1 - 2004/1/1

N2 - The edge transport barrier (ETB) for particle transport is formed in the neutral beam (NB) heated hydrogen discharges in compact helical system (CHS). The transition to the ETB formation and the back transition are controlled by the heating power. The existence of the heating power threshold is confirmed and it is roughly proportional to the density. The Hα emission signal shows a clear drop at the transition (the timescale of signal decrease is ∼1 ms for the high heating power case). The ETB formation continues for the full duration of NB injection (100 ms) with a moderate level of radiation power loss. Local density profile measurement shows increase of the edge density and the movement of the density gradient region towards the edge.

AB - The edge transport barrier (ETB) for particle transport is formed in the neutral beam (NB) heated hydrogen discharges in compact helical system (CHS). The transition to the ETB formation and the back transition are controlled by the heating power. The existence of the heating power threshold is confirmed and it is roughly proportional to the density. The Hα emission signal shows a clear drop at the transition (the timescale of signal decrease is ∼1 ms for the high heating power case). The ETB formation continues for the full duration of NB injection (100 ms) with a moderate level of radiation power loss. Local density profile measurement shows increase of the edge density and the movement of the density gradient region towards the edge.

UR - http://www.scopus.com/inward/record.url?scp=2942616708&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=2942616708&partnerID=8YFLogxK

U2 - 10.1088/0741-3335/46/5A/012

DO - 10.1088/0741-3335/46/5A/012

M3 - Article

AN - SCOPUS:2942616708

VL - 46

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

SN - 0741-3335

IS - 5 SUPPL. A

ER -