TY - JOUR
T1 - TSC simulation of transient CHI in new electrode configuration on QUEST
AU - Kuroda, Kengoh
AU - Raman, Roger
AU - Jardin, Stephen C.
AU - Ono, Masayuki
AU - Hanada, Kazuaki
N1 - Funding Information:
This work is supported by Japan / U. S. Cooperation in Fusion Research and Development, NIFS Collaboration Research Program (NIFS17KUTR130), the Collaborative Research Program of RIAM, Kyushu University (international collaboration frame work No.8 in 2017) and a Grant-in-Aid for JSPS Fellows (KAKENHI Grant Number 16H02441, 24656559). This work is supported by US DOE under the Contracts DE-FG02-99ER54519 and DE-AC02-09CH11466.
Funding Information:
This work is supported by Japan / U. S. Cooperation in Fusion Research and Development, NIFS Collaboration Research Program (NIFS17KUTR130), the Collaborative Research Program of RIAM, Kyushu University (international collaboration frame work No.8 in 2017) and a Grant-in-Aid for JSPS Fellows (KAKENHI Grant Number 16H02441, 24656559). This work is supported by US DOE under the Contracts DE-FG02-99ER54519 and DEAC02-09CH11466
Publisher Copyright:
© 2019 The Japan Society of Plasma.
PY - 2018
Y1 - 2018
N2 - In QUEST, transient Coaxial Helicity Injection (CHI) has now been implemented using a new electrode configuration in which the CHI insulator is not part of the vacuum boundary. In this paper, for the first time, suitable conditions for generation of the CHI-produced toroidal current in the QUEST vessel configuration were investigated using the Tokamak Simulation Code (TSC). The simulation results show that the configuration in which the biased electrode is located farther away from the injector flux coil requires higher currents in the injector coil to generate the required injector flux. Additionally, energizing a lower inboard poloidal field coil and possibly lowering the electrode plate closer to the injector flux coil may be necessary to improve injector flux shaping to permit a configuration that is more favorable for inducing flux closure.
AB - In QUEST, transient Coaxial Helicity Injection (CHI) has now been implemented using a new electrode configuration in which the CHI insulator is not part of the vacuum boundary. In this paper, for the first time, suitable conditions for generation of the CHI-produced toroidal current in the QUEST vessel configuration were investigated using the Tokamak Simulation Code (TSC). The simulation results show that the configuration in which the biased electrode is located farther away from the injector flux coil requires higher currents in the injector coil to generate the required injector flux. Additionally, energizing a lower inboard poloidal field coil and possibly lowering the electrode plate closer to the injector flux coil may be necessary to improve injector flux shaping to permit a configuration that is more favorable for inducing flux closure.
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U2 - 10.1585/PFR.13.3402059
DO - 10.1585/PFR.13.3402059
M3 - Article
AN - SCOPUS:85069969864
SN - 1880-6821
VL - 13
JO - Plasma and Fusion Research
JF - Plasma and Fusion Research
M1 - 3402059
ER -