Power Balance Estimation in Long Duration Discharges on QUEST

K. Hanada, H. Zushi, H. Idei, K. Nakamura, M. Ishiguro, S. Tashima, E. I. Kalinnikova, Y. Nagashima, M. Hasegawa, A. Fujisawa, A. Higashijima, S. Kawasaki, H. Nakashima, O. Mitarai, A. Fukuyama, Y. Takase, X. Gao, H. Liu, J. Qian, M. OnoR. Raman

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Fully non-inductive plasma start-up was successfully achieved by using a well-controlled microwave source on the spherical tokamak, QUEST. Non-inductive plasmas were maintained for approximately 3-5 min, during which time power balance estimates could be achieved by monitoring wall and cooling-water temperatures. Approximately 70%-90% of the injected power could be accounted for by calorimetric measurements and approximately half of the injected power was found to be deposited on the vessel wall, which is slightly dependent on the magnetic configuration. The power distribution to water-cooled limiters, which are expected to be exposed to local heat loads, depends significantly on the magnetic configuration, however some of the deposited power is due to energetic electrons, which have large poloidal orbits and are likely to be deposited on the plasma facing components.

Original languageEnglish
Pages (from-to)1069-1075
Number of pages7
JournalPlasma Science and Technology
Volume18
Issue number11
DOIs
Publication statusPublished - Nov 2016

Fingerprint

water temperature
configurations
vessels
orbits
cooling
microwaves
heat
estimates
water
electrons

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Power Balance Estimation in Long Duration Discharges on QUEST. / Hanada, K.; Zushi, H.; Idei, H.; Nakamura, K.; Ishiguro, M.; Tashima, S.; Kalinnikova, E. I.; Nagashima, Y.; Hasegawa, M.; Fujisawa, A.; Higashijima, A.; Kawasaki, S.; Nakashima, H.; Mitarai, O.; Fukuyama, A.; Takase, Y.; Gao, X.; Liu, H.; Qian, J.; Ono, M.; Raman, R.

In: Plasma Science and Technology, Vol. 18, No. 11, 11.2016, p. 1069-1075.

Research output: Contribution to journalArticle

Hanada, K, Zushi, H, Idei, H, Nakamura, K, Ishiguro, M, Tashima, S, Kalinnikova, EI, Nagashima, Y, Hasegawa, M, Fujisawa, A, Higashijima, A, Kawasaki, S, Nakashima, H, Mitarai, O, Fukuyama, A, Takase, Y, Gao, X, Liu, H, Qian, J, Ono, M & Raman, R 2016, 'Power Balance Estimation in Long Duration Discharges on QUEST', Plasma Science and Technology, vol. 18, no. 11, pp. 1069-1075. https://doi.org/10.1088/1009-0630/18/11/03
Hanada, K. ; Zushi, H. ; Idei, H. ; Nakamura, K. ; Ishiguro, M. ; Tashima, S. ; Kalinnikova, E. I. ; Nagashima, Y. ; Hasegawa, M. ; Fujisawa, A. ; Higashijima, A. ; Kawasaki, S. ; Nakashima, H. ; Mitarai, O. ; Fukuyama, A. ; Takase, Y. ; Gao, X. ; Liu, H. ; Qian, J. ; Ono, M. ; Raman, R. / Power Balance Estimation in Long Duration Discharges on QUEST. In: Plasma Science and Technology. 2016 ; Vol. 18, No. 11. pp. 1069-1075.
@article{9a860d95a6ef4347806fecd41fcf3d6e,
title = "Power Balance Estimation in Long Duration Discharges on QUEST",
abstract = "Fully non-inductive plasma start-up was successfully achieved by using a well-controlled microwave source on the spherical tokamak, QUEST. Non-inductive plasmas were maintained for approximately 3-5 min, during which time power balance estimates could be achieved by monitoring wall and cooling-water temperatures. Approximately 70{\%}-90{\%} of the injected power could be accounted for by calorimetric measurements and approximately half of the injected power was found to be deposited on the vessel wall, which is slightly dependent on the magnetic configuration. The power distribution to water-cooled limiters, which are expected to be exposed to local heat loads, depends significantly on the magnetic configuration, however some of the deposited power is due to energetic electrons, which have large poloidal orbits and are likely to be deposited on the plasma facing components.",
author = "K. Hanada and H. Zushi and H. Idei and K. Nakamura and M. Ishiguro and S. Tashima and Kalinnikova, {E. I.} and Y. Nagashima and M. Hasegawa and A. Fujisawa and A. Higashijima and S. Kawasaki and H. Nakashima and O. Mitarai and A. Fukuyama and Y. Takase and X. Gao and H. Liu and J. Qian and M. Ono and R. Raman",
year = "2016",
month = "11",
doi = "10.1088/1009-0630/18/11/03",
language = "English",
volume = "18",
pages = "1069--1075",
journal = "Plasma Science and Technology",
issn = "1009-0630",
publisher = "IOP Publishing Ltd.",
number = "11",

}

TY - JOUR

T1 - Power Balance Estimation in Long Duration Discharges on QUEST

AU - Hanada, K.

AU - Zushi, H.

AU - Idei, H.

AU - Nakamura, K.

AU - Ishiguro, M.

AU - Tashima, S.

AU - Kalinnikova, E. I.

AU - Nagashima, Y.

AU - Hasegawa, M.

AU - Fujisawa, A.

AU - Higashijima, A.

AU - Kawasaki, S.

AU - Nakashima, H.

AU - Mitarai, O.

AU - Fukuyama, A.

AU - Takase, Y.

AU - Gao, X.

AU - Liu, H.

AU - Qian, J.

AU - Ono, M.

AU - Raman, R.

PY - 2016/11

Y1 - 2016/11

N2 - Fully non-inductive plasma start-up was successfully achieved by using a well-controlled microwave source on the spherical tokamak, QUEST. Non-inductive plasmas were maintained for approximately 3-5 min, during which time power balance estimates could be achieved by monitoring wall and cooling-water temperatures. Approximately 70%-90% of the injected power could be accounted for by calorimetric measurements and approximately half of the injected power was found to be deposited on the vessel wall, which is slightly dependent on the magnetic configuration. The power distribution to water-cooled limiters, which are expected to be exposed to local heat loads, depends significantly on the magnetic configuration, however some of the deposited power is due to energetic electrons, which have large poloidal orbits and are likely to be deposited on the plasma facing components.

AB - Fully non-inductive plasma start-up was successfully achieved by using a well-controlled microwave source on the spherical tokamak, QUEST. Non-inductive plasmas were maintained for approximately 3-5 min, during which time power balance estimates could be achieved by monitoring wall and cooling-water temperatures. Approximately 70%-90% of the injected power could be accounted for by calorimetric measurements and approximately half of the injected power was found to be deposited on the vessel wall, which is slightly dependent on the magnetic configuration. The power distribution to water-cooled limiters, which are expected to be exposed to local heat loads, depends significantly on the magnetic configuration, however some of the deposited power is due to energetic electrons, which have large poloidal orbits and are likely to be deposited on the plasma facing components.

UR - http://www.scopus.com/inward/record.url?scp=84994493575&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84994493575&partnerID=8YFLogxK

U2 - 10.1088/1009-0630/18/11/03

DO - 10.1088/1009-0630/18/11/03

M3 - Article

AN - SCOPUS:84994493575

VL - 18

SP - 1069

EP - 1075

JO - Plasma Science and Technology

JF - Plasma Science and Technology

SN - 1009-0630

IS - 11

ER -