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.
N1 - Funding Information:
This work was supported by Grant-in-Aid for JSPS Fellows (KAKENHI Grant Number 16H02441, 24656559) and performed with the support and under the auspices of the NIFS Collaboration Research Program (NIFS05KUTRO14, NIFS11KUTR061, NIFS13KUTR085, NIFS14KUTR103). This work was supported in part by the Collaborative Research Program of the Research Institute for Applied Mechanics, Kyushu University. This work was partly supported by the JSPS-NRF-NSFC A3 Foresight Program in the Field of Plasma Physics (No. 11261140328).
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.
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U2 - 10.1088/1009-0630/18/11/03
DO - 10.1088/1009-0630/18/11/03
M3 - Article
AN - SCOPUS:84994493575
SN - 1009-0630
VL - 18
SP - 1069
EP - 1075
JO - Plasma Science and Technology
JF - Plasma Science and Technology
IS - 11
ER -