Centre-solenoid-free merging start-up of spherical tokamak plasmas in UTST

M. Inomoto, T. G. Watanabe, K. Gi, K. Yamasaki, S. Kamio, R. Imazawa, T. Yamada, X. Guo, T. Ushiki, H. Ishikawa, H. Nakamata, N. Kawakami, T. Sugawara, K. Matsuyama, K. Noma, A. Kuwahata, H. Tanabe

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

A centre-solenoid-free merging start-up scheme for spherical tokamak plasmas was developed in a University of Tokyo spherical tokamak (UTST) experiment by using outer poloidal field coils. Torus breakdown was initiated at null points and two spherical tokamak plasmas with a total current up to 80kA were generated inductively. Their merging process provided substantial ion and electron heating by magnetic reconnection. The obtained dependence of heating on plasma current suggests that high-temperature and high-current plasma suitable for neutral beam injection is attainable under the realistic conditions in the merging start-up method.

Original languageEnglish
Article number033013
JournalNuclear Fusion
Volume55
Issue number3
DOIs
Publication statusPublished - Mar 1 2015

Fingerprint

solenoids
field coils
heating
beam injection
plasma currents
neutral beams
high current
breakdown
ions
electrons

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

Cite this

Inomoto, M., Watanabe, T. G., Gi, K., Yamasaki, K., Kamio, S., Imazawa, R., ... Tanabe, H. (2015). Centre-solenoid-free merging start-up of spherical tokamak plasmas in UTST. Nuclear Fusion, 55(3), [033013]. https://doi.org/10.1088/0029-5515/55/3/033013

Centre-solenoid-free merging start-up of spherical tokamak plasmas in UTST. / Inomoto, M.; Watanabe, T. G.; Gi, K.; Yamasaki, K.; Kamio, S.; Imazawa, R.; Yamada, T.; Guo, X.; Ushiki, T.; Ishikawa, H.; Nakamata, H.; Kawakami, N.; Sugawara, T.; Matsuyama, K.; Noma, K.; Kuwahata, A.; Tanabe, H.

In: Nuclear Fusion, Vol. 55, No. 3, 033013, 01.03.2015.

Research output: Contribution to journalArticle

Inomoto, M, Watanabe, TG, Gi, K, Yamasaki, K, Kamio, S, Imazawa, R, Yamada, T, Guo, X, Ushiki, T, Ishikawa, H, Nakamata, H, Kawakami, N, Sugawara, T, Matsuyama, K, Noma, K, Kuwahata, A & Tanabe, H 2015, 'Centre-solenoid-free merging start-up of spherical tokamak plasmas in UTST', Nuclear Fusion, vol. 55, no. 3, 033013. https://doi.org/10.1088/0029-5515/55/3/033013
Inomoto M, Watanabe TG, Gi K, Yamasaki K, Kamio S, Imazawa R et al. Centre-solenoid-free merging start-up of spherical tokamak plasmas in UTST. Nuclear Fusion. 2015 Mar 1;55(3). 033013. https://doi.org/10.1088/0029-5515/55/3/033013
Inomoto, M. ; Watanabe, T. G. ; Gi, K. ; Yamasaki, K. ; Kamio, S. ; Imazawa, R. ; Yamada, T. ; Guo, X. ; Ushiki, T. ; Ishikawa, H. ; Nakamata, H. ; Kawakami, N. ; Sugawara, T. ; Matsuyama, K. ; Noma, K. ; Kuwahata, A. ; Tanabe, H. / Centre-solenoid-free merging start-up of spherical tokamak plasmas in UTST. In: Nuclear Fusion. 2015 ; Vol. 55, No. 3.
@article{7fd9a0d7e1814c04a00acef8a1ba60ae,
title = "Centre-solenoid-free merging start-up of spherical tokamak plasmas in UTST",
abstract = "A centre-solenoid-free merging start-up scheme for spherical tokamak plasmas was developed in a University of Tokyo spherical tokamak (UTST) experiment by using outer poloidal field coils. Torus breakdown was initiated at null points and two spherical tokamak plasmas with a total current up to 80kA were generated inductively. Their merging process provided substantial ion and electron heating by magnetic reconnection. The obtained dependence of heating on plasma current suggests that high-temperature and high-current plasma suitable for neutral beam injection is attainable under the realistic conditions in the merging start-up method.",
author = "M. Inomoto and Watanabe, {T. G.} and K. Gi and K. Yamasaki and S. Kamio and R. Imazawa and T. Yamada and X. Guo and T. Ushiki and H. Ishikawa and H. Nakamata and N. Kawakami and T. Sugawara and K. Matsuyama and K. Noma and A. Kuwahata and H. Tanabe",
year = "2015",
month = "3",
day = "1",
doi = "10.1088/0029-5515/55/3/033013",
language = "English",
volume = "55",
journal = "Nuclear Fusion",
issn = "0029-5515",
publisher = "IOP Publishing Ltd.",
number = "3",

}

TY - JOUR

T1 - Centre-solenoid-free merging start-up of spherical tokamak plasmas in UTST

AU - Inomoto, M.

AU - Watanabe, T. G.

AU - Gi, K.

AU - Yamasaki, K.

AU - Kamio, S.

AU - Imazawa, R.

AU - Yamada, T.

AU - Guo, X.

AU - Ushiki, T.

AU - Ishikawa, H.

AU - Nakamata, H.

AU - Kawakami, N.

AU - Sugawara, T.

AU - Matsuyama, K.

AU - Noma, K.

AU - Kuwahata, A.

AU - Tanabe, H.

PY - 2015/3/1

Y1 - 2015/3/1

N2 - A centre-solenoid-free merging start-up scheme for spherical tokamak plasmas was developed in a University of Tokyo spherical tokamak (UTST) experiment by using outer poloidal field coils. Torus breakdown was initiated at null points and two spherical tokamak plasmas with a total current up to 80kA were generated inductively. Their merging process provided substantial ion and electron heating by magnetic reconnection. The obtained dependence of heating on plasma current suggests that high-temperature and high-current plasma suitable for neutral beam injection is attainable under the realistic conditions in the merging start-up method.

AB - A centre-solenoid-free merging start-up scheme for spherical tokamak plasmas was developed in a University of Tokyo spherical tokamak (UTST) experiment by using outer poloidal field coils. Torus breakdown was initiated at null points and two spherical tokamak plasmas with a total current up to 80kA were generated inductively. Their merging process provided substantial ion and electron heating by magnetic reconnection. The obtained dependence of heating on plasma current suggests that high-temperature and high-current plasma suitable for neutral beam injection is attainable under the realistic conditions in the merging start-up method.

UR - http://www.scopus.com/inward/record.url?scp=84924030646&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84924030646&partnerID=8YFLogxK

U2 - 10.1088/0029-5515/55/3/033013

DO - 10.1088/0029-5515/55/3/033013

M3 - Article

AN - SCOPUS:84924030646

VL - 55

JO - Nuclear Fusion

JF - Nuclear Fusion

SN - 0029-5515

IS - 3

M1 - 033013

ER -