Application of the intermediate frequency range fast wave to the jipp tii-u plasma

T. Seki, R. Kumazawa, T. Watari, A. Ando, Y. Oka, O. Kaneko, K. Adati, R. Akiyama, R. Ando, T. Aoki, Y. Hamada, S. Hidekuma, S. Hirokura, K. Ida, K. Itoh, Sanae Itoh, E. Kako, A. Karita, K. Kawahata, T. Kawamoto & 21 others Y. Kawasumi, S. Kitagawa, Y. Kitoh, M. Kojima, T. Kuroda, K. Masai, S. Morita, K. Narihara, Y. Ogawa, K. Ohkubo, T. Ozaki, M. Sakamoto, M. Sasao, K. Sato, K. N. Sato, F. Shimbo, H. Takahashi, S. Tanahashi, Y. Taniguchi, K. Toi, T. Tsuzuki

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

A series of experiments has been conducted on the JIPP TII-U tokamak since 1989, using the newly constructed 130 MHz radiofrequency system. It has been predicted theoretically that the fast wave in this frequency range interacts weakly with particles. Two mechanisms of wave absorption have been identified in the experiment: Electron Landau damping/transit time damping and 3rd harmonic ion cyclotron heating. The former mechanism is intimately connected with fast wave current drive and the latter can provide a new regime of plasma heating or a possible method of controlling the transport of alpha particles. It is found that the efficiency of the 3rd harmonic ion cyclotron heating is improved by using it in combination with neutral beam injection and ion cyclotron range of frequency heating. The heating efficiency obtained is as high as that of conventional heating. The experimental results are also analysed on the basis of a global wave theory which takes into account wave-particle interactions. These mechanisms of interaction are competing with each other; this will also be the case under more realistic reactor conditions.

Original languageEnglish
Pages (from-to)1369-1381
Number of pages13
JournalNuclear Fusion
Volume31
Issue number7
DOIs
Publication statusPublished - Jan 1 1991

Fingerprint

intermediate frequencies
frequency ranges
heating
cyclotrons
harmonics
wave-particle interactions
ions
plasma heating
Landau damping
beam injection
neutral beams
transit time
alpha particles
damping
reactors
electrons
interactions

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

Cite this

Seki, T., Kumazawa, R., Watari, T., Ando, A., Oka, Y., Kaneko, O., ... Tsuzuki, T. (1991). Application of the intermediate frequency range fast wave to the jipp tii-u plasma. Nuclear Fusion, 31(7), 1369-1381. https://doi.org/10.1088/0029-5515/31/7/012

Application of the intermediate frequency range fast wave to the jipp tii-u plasma. / Seki, T.; Kumazawa, R.; Watari, T.; Ando, A.; Oka, Y.; Kaneko, O.; Adati, K.; Akiyama, R.; Ando, R.; Aoki, T.; Hamada, Y.; Hidekuma, S.; Hirokura, S.; Ida, K.; Itoh, K.; Itoh, Sanae; Kako, E.; Karita, A.; Kawahata, K.; Kawamoto, T.; Kawasumi, Y.; Kitagawa, S.; Kitoh, Y.; Kojima, M.; Kuroda, T.; Masai, K.; Morita, S.; Narihara, K.; Ogawa, Y.; Ohkubo, K.; Ozaki, T.; Sakamoto, M.; Sasao, M.; Sato, K.; Sato, K. N.; Shimbo, F.; Takahashi, H.; Tanahashi, S.; Taniguchi, Y.; Toi, K.; Tsuzuki, T.

In: Nuclear Fusion, Vol. 31, No. 7, 01.01.1991, p. 1369-1381.

Research output: Contribution to journalArticle

Seki, T, Kumazawa, R, Watari, T, Ando, A, Oka, Y, Kaneko, O, Adati, K, Akiyama, R, Ando, R, Aoki, T, Hamada, Y, Hidekuma, S, Hirokura, S, Ida, K, Itoh, K, Itoh, S, Kako, E, Karita, A, Kawahata, K, Kawamoto, T, Kawasumi, Y, Kitagawa, S, Kitoh, Y, Kojima, M, Kuroda, T, Masai, K, Morita, S, Narihara, K, Ogawa, Y, Ohkubo, K, Ozaki, T, Sakamoto, M, Sasao, M, Sato, K, Sato, KN, Shimbo, F, Takahashi, H, Tanahashi, S, Taniguchi, Y, Toi, K & Tsuzuki, T 1991, 'Application of the intermediate frequency range fast wave to the jipp tii-u plasma', Nuclear Fusion, vol. 31, no. 7, pp. 1369-1381. https://doi.org/10.1088/0029-5515/31/7/012
Seki T, Kumazawa R, Watari T, Ando A, Oka Y, Kaneko O et al. Application of the intermediate frequency range fast wave to the jipp tii-u plasma. Nuclear Fusion. 1991 Jan 1;31(7):1369-1381. https://doi.org/10.1088/0029-5515/31/7/012
Seki, T. ; Kumazawa, R. ; Watari, T. ; Ando, A. ; Oka, Y. ; Kaneko, O. ; Adati, K. ; Akiyama, R. ; Ando, R. ; Aoki, T. ; Hamada, Y. ; Hidekuma, S. ; Hirokura, S. ; Ida, K. ; Itoh, K. ; Itoh, Sanae ; Kako, E. ; Karita, A. ; Kawahata, K. ; Kawamoto, T. ; Kawasumi, Y. ; Kitagawa, S. ; Kitoh, Y. ; Kojima, M. ; Kuroda, T. ; Masai, K. ; Morita, S. ; Narihara, K. ; Ogawa, Y. ; Ohkubo, K. ; Ozaki, T. ; Sakamoto, M. ; Sasao, M. ; Sato, K. ; Sato, K. N. ; Shimbo, F. ; Takahashi, H. ; Tanahashi, S. ; Taniguchi, Y. ; Toi, K. ; Tsuzuki, T. / Application of the intermediate frequency range fast wave to the jipp tii-u plasma. In: Nuclear Fusion. 1991 ; Vol. 31, No. 7. pp. 1369-1381.
@article{52eeaa46621e48e1b6db2d0eee66b4bc,
title = "Application of the intermediate frequency range fast wave to the jipp tii-u plasma",
abstract = "A series of experiments has been conducted on the JIPP TII-U tokamak since 1989, using the newly constructed 130 MHz radiofrequency system. It has been predicted theoretically that the fast wave in this frequency range interacts weakly with particles. Two mechanisms of wave absorption have been identified in the experiment: Electron Landau damping/transit time damping and 3rd harmonic ion cyclotron heating. The former mechanism is intimately connected with fast wave current drive and the latter can provide a new regime of plasma heating or a possible method of controlling the transport of alpha particles. It is found that the efficiency of the 3rd harmonic ion cyclotron heating is improved by using it in combination with neutral beam injection and ion cyclotron range of frequency heating. The heating efficiency obtained is as high as that of conventional heating. The experimental results are also analysed on the basis of a global wave theory which takes into account wave-particle interactions. These mechanisms of interaction are competing with each other; this will also be the case under more realistic reactor conditions.",
author = "T. Seki and R. Kumazawa and T. Watari and A. Ando and Y. Oka and O. Kaneko and K. Adati and R. Akiyama and R. Ando and T. Aoki and Y. Hamada and S. Hidekuma and S. Hirokura and K. Ida and K. Itoh and Sanae Itoh and E. Kako and A. Karita and K. Kawahata and T. Kawamoto and Y. Kawasumi and S. Kitagawa and Y. Kitoh and M. Kojima and T. Kuroda and K. Masai and S. Morita and K. Narihara and Y. Ogawa and K. Ohkubo and T. Ozaki and M. Sakamoto and M. Sasao and K. Sato and Sato, {K. N.} and F. Shimbo and H. Takahashi and S. Tanahashi and Y. Taniguchi and K. Toi and T. Tsuzuki",
year = "1991",
month = "1",
day = "1",
doi = "10.1088/0029-5515/31/7/012",
language = "English",
volume = "31",
pages = "1369--1381",
journal = "Nuclear Fusion",
issn = "0029-5515",
publisher = "IOP Publishing Ltd.",
number = "7",

}

TY - JOUR

T1 - Application of the intermediate frequency range fast wave to the jipp tii-u plasma

AU - Seki, T.

AU - Kumazawa, R.

AU - Watari, T.

AU - Ando, A.

AU - Oka, Y.

AU - Kaneko, O.

AU - Adati, K.

AU - Akiyama, R.

AU - Ando, R.

AU - Aoki, T.

AU - Hamada, Y.

AU - Hidekuma, S.

AU - Hirokura, S.

AU - Ida, K.

AU - Itoh, K.

AU - Itoh, Sanae

AU - Kako, E.

AU - Karita, A.

AU - Kawahata, K.

AU - Kawamoto, T.

AU - Kawasumi, Y.

AU - Kitagawa, S.

AU - Kitoh, Y.

AU - Kojima, M.

AU - Kuroda, T.

AU - Masai, K.

AU - Morita, S.

AU - Narihara, K.

AU - Ogawa, Y.

AU - Ohkubo, K.

AU - Ozaki, T.

AU - Sakamoto, M.

AU - Sasao, M.

AU - Sato, K.

AU - Sato, K. N.

AU - Shimbo, F.

AU - Takahashi, H.

AU - Tanahashi, S.

AU - Taniguchi, Y.

AU - Toi, K.

AU - Tsuzuki, T.

PY - 1991/1/1

Y1 - 1991/1/1

N2 - A series of experiments has been conducted on the JIPP TII-U tokamak since 1989, using the newly constructed 130 MHz radiofrequency system. It has been predicted theoretically that the fast wave in this frequency range interacts weakly with particles. Two mechanisms of wave absorption have been identified in the experiment: Electron Landau damping/transit time damping and 3rd harmonic ion cyclotron heating. The former mechanism is intimately connected with fast wave current drive and the latter can provide a new regime of plasma heating or a possible method of controlling the transport of alpha particles. It is found that the efficiency of the 3rd harmonic ion cyclotron heating is improved by using it in combination with neutral beam injection and ion cyclotron range of frequency heating. The heating efficiency obtained is as high as that of conventional heating. The experimental results are also analysed on the basis of a global wave theory which takes into account wave-particle interactions. These mechanisms of interaction are competing with each other; this will also be the case under more realistic reactor conditions.

AB - A series of experiments has been conducted on the JIPP TII-U tokamak since 1989, using the newly constructed 130 MHz radiofrequency system. It has been predicted theoretically that the fast wave in this frequency range interacts weakly with particles. Two mechanisms of wave absorption have been identified in the experiment: Electron Landau damping/transit time damping and 3rd harmonic ion cyclotron heating. The former mechanism is intimately connected with fast wave current drive and the latter can provide a new regime of plasma heating or a possible method of controlling the transport of alpha particles. It is found that the efficiency of the 3rd harmonic ion cyclotron heating is improved by using it in combination with neutral beam injection and ion cyclotron range of frequency heating. The heating efficiency obtained is as high as that of conventional heating. The experimental results are also analysed on the basis of a global wave theory which takes into account wave-particle interactions. These mechanisms of interaction are competing with each other; this will also be the case under more realistic reactor conditions.

UR - http://www.scopus.com/inward/record.url?scp=0026185923&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026185923&partnerID=8YFLogxK

U2 - 10.1088/0029-5515/31/7/012

DO - 10.1088/0029-5515/31/7/012

M3 - Article

VL - 31

SP - 1369

EP - 1381

JO - Nuclear Fusion

JF - Nuclear Fusion

SN - 0029-5515

IS - 7

ER -