Behaviour of ion temperature in electron and ion heating regimes observed with ECH, NBI and ICRF discharges of LHD

S. Morita; M. Goto; S. Kubo; S. Murakami; K. Narihara; M. Osakabe; T. Seki; Y. Takeiri; K. Tanaka; H. Yamada; H. Funaba; H. Idei; K. Ida; K. Ikeda; S. Inagaki; O. Kaneko; K. Kawahata; A. Komori; R. Kumazawa; S. Masuzaki; J. Miyazawa; T. Morisaki; O. Motojima; S. Muto; T. Mutoh; Y. Nagayama; Y. Nakamura; K. Nishimura; S. Ohdachi; N. Ohyabu; Y. Oka; T. Ozaki; B. J. Peterson; S. Sakakibara; R. Sakamoto; M. Sasao; K. Sato; T. Shimozuma; M. Shoji; H. Suzuki; K. Toi; T. Tokuzawa; K. Tsumori; K. Y. Watanabe; T. Watari; I. Yamada

doi:10.1088/0029-5515/42/10/301

Behaviour of ion temperature in electron and ion heating regimes observed with ECH, NBI and ICRF discharges of LHD

S. Morita, M. Goto, S. Kubo, S. Murakami, K. Narihara, M. Osakabe, T. Seki, Y. Takeiri, K. Tanaka, H. Yamada, H. Funaba, H. Idei, K. Ida, K. Ikeda, S. Inagaki, O. Kaneko, K. Kawahata, A. Komori, R. Kumazawa, S. MasuzakiJ. Miyazawa, T. Morisaki, O. Motojima, S. Muto, T. Mutoh, Y. Nagayama, Y. Nakamura, K. Nishimura, S. Ohdachi, N. Ohyabu, Y. Oka, T. Ozaki, B. J. Peterson, S. Sakakibara, R. Sakamoto, M. Sasao, K. Sato, T. Shimozuma, M. Shoji, H. Suzuki, K. Toi, T. Tokuzawa, K. Tsumori, K. Y. Watanabe, T. Watari, I. Yamada

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Abstract

Ion temperature at the plasma centre has been measured from Doppler broadening of Ti XXI (2.61 Å) and Ar XVII (3.95 Å) x-ray lines using a newly installed crystal spectrometer with CCD detector in ECH, NBI and ICRF plasmas of Large Helical Device (LHD). The ion temperature obtained in a range of 0.6 and 3.5 kev was analysed with electron density and compared with electron temperature. A new parameter range of T_i > T_e was found in low-density (n_e < 10¹³ cm^-3) H-minority ICRF discharges operated in the ion-heating regime (P_i ≥ P_e), whereas the ion temperature was roughly equal to the electron temperature in NBI discharges operated in the electron-heating regime (P_i < P_e). The ion temperature in the ICRF and ICRF + NBI discharges was correlated with the input power to bulk ions over the ion density (P_i/n_i). As a result, a good correlation was obtained between them and it also indicated a clear rise of the ion temperature for the increasing Pi in a range of P_i/n_i < 5 (MW/10¹³ cm^-3).

Original language	English
Pages (from-to)	1179-1183
Number of pages	5
Journal	Nuclear Fusion
Volume	42
Issue number	10
DOIs	https://doi.org/10.1088/0029-5515/42/10/301
Publication status	Published - Oct 1 2002
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Condensed Matter Physics

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10.1088/0029-5515/42/10/301

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Morita, S., Goto, M., Kubo, S., Murakami, S., Narihara, K., Osakabe, M., Seki, T., Takeiri, Y., Tanaka, K., Yamada, H., Funaba, H., Idei, H., Ida, K., Ikeda, K., Inagaki, S., Kaneko, O., Kawahata, K., Komori, A., Kumazawa, R., ... Yamada, I. (2002). Behaviour of ion temperature in electron and ion heating regimes observed with ECH, NBI and ICRF discharges of LHD. Nuclear Fusion, 42(10), 1179-1183. https://doi.org/10.1088/0029-5515/42/10/301

Morita, S, Goto, M, Kubo, S, Murakami, S, Narihara, K, Osakabe, M, Seki, T, Takeiri, Y, Tanaka, K, Yamada, H, Funaba, H, Idei, H, Ida, K, Ikeda, K, Inagaki, S, Kaneko, O, Kawahata, K, Komori, A, Kumazawa, R, Masuzaki, S, Miyazawa, J, Morisaki, T, Motojima, O, Muto, S, Mutoh, T, Nagayama, Y, Nakamura, Y, Nishimura, K, Ohdachi, S, Ohyabu, N, Oka, Y, Ozaki, T, Peterson, BJ, Sakakibara, S, Sakamoto, R, Sasao, M, Sato, K, Shimozuma, T, Shoji, M, Suzuki, H, Toi, K, Tokuzawa, T, Tsumori, K, Watanabe, KY, Watari, T & Yamada, I 2002, 'Behaviour of ion temperature in electron and ion heating regimes observed with ECH, NBI and ICRF discharges of LHD', Nuclear Fusion, vol. 42, no. 10, pp. 1179-1183. https://doi.org/10.1088/0029-5515/42/10/301

@article{b77f98db6573493ebb2968d2ef18f6f1,

title = "Behaviour of ion temperature in electron and ion heating regimes observed with ECH, NBI and ICRF discharges of LHD",

abstract = "Ion temperature at the plasma centre has been measured from Doppler broadening of Ti XXI (2.61 {\AA}) and Ar XVII (3.95 {\AA}) x-ray lines using a newly installed crystal spectrometer with CCD detector in ECH, NBI and ICRF plasmas of Large Helical Device (LHD). The ion temperature obtained in a range of 0.6 and 3.5 kev was analysed with electron density and compared with electron temperature. A new parameter range of Ti > Te was found in low-density (ne < 1013 cm-3) H-minority ICRF discharges operated in the ion-heating regime (Pi ≥ Pe), whereas the ion temperature was roughly equal to the electron temperature in NBI discharges operated in the electron-heating regime (Pi < Pe). The ion temperature in the ICRF and ICRF + NBI discharges was correlated with the input power to bulk ions over the ion density (Pi/ni). As a result, a good correlation was obtained between them and it also indicated a clear rise of the ion temperature for the increasing Pi in a range of Pi/ni < 5 (MW/1013 cm-3).",

author = "S. Morita and M. Goto and S. Kubo and S. Murakami and K. Narihara and M. Osakabe and T. Seki and Y. Takeiri and K. Tanaka and H. Yamada and H. Funaba and H. Idei and K. Ida and K. Ikeda and S. Inagaki and O. Kaneko and K. Kawahata and A. Komori and R. Kumazawa and S. Masuzaki and J. Miyazawa and T. Morisaki and O. Motojima and S. Muto and T. Mutoh and Y. Nagayama and Y. Nakamura and K. Nishimura and S. Ohdachi and N. Ohyabu and Y. Oka and T. Ozaki and Peterson, {B. J.} and S. Sakakibara and R. Sakamoto and M. Sasao and K. Sato and T. Shimozuma and M. Shoji and H. Suzuki and K. Toi and T. Tokuzawa and K. Tsumori and Watanabe, {K. Y.} and T. Watari and I. Yamada",

year = "2002",

month = oct,

day = "1",

doi = "10.1088/0029-5515/42/10/301",

language = "English",

volume = "42",

pages = "1179--1183",

journal = "Nuclear Fusion",

issn = "0029-5515",

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number = "10",

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TY - JOUR

T1 - Behaviour of ion temperature in electron and ion heating regimes observed with ECH, NBI and ICRF discharges of LHD

AU - Morita, S.

AU - Goto, M.

AU - Kubo, S.

AU - Murakami, S.

AU - Narihara, K.

AU - Osakabe, M.

AU - Seki, T.

AU - Takeiri, Y.

AU - Tanaka, K.

AU - Yamada, H.

AU - Funaba, H.

AU - Idei, H.

AU - Ida, K.

AU - Ikeda, K.

AU - Inagaki, S.

AU - Kaneko, O.

AU - Kawahata, K.

AU - Komori, A.

AU - Kumazawa, R.

AU - Masuzaki, S.

AU - Miyazawa, J.

AU - Morisaki, T.

AU - Motojima, O.

AU - Muto, S.

AU - Mutoh, T.

AU - Nagayama, Y.

AU - Nakamura, Y.

AU - Nishimura, K.

AU - Ohdachi, S.

AU - Ohyabu, N.

AU - Oka, Y.

AU - Ozaki, T.

AU - Peterson, B. J.

AU - Sakakibara, S.

AU - Sakamoto, R.

AU - Sasao, M.

AU - Sato, K.

AU - Shimozuma, T.

AU - Shoji, M.

AU - Suzuki, H.

AU - Toi, K.

AU - Tokuzawa, T.

AU - Tsumori, K.

AU - Watanabe, K. Y.

AU - Watari, T.

AU - Yamada, I.

PY - 2002/10/1

Y1 - 2002/10/1

N2 - Ion temperature at the plasma centre has been measured from Doppler broadening of Ti XXI (2.61 Å) and Ar XVII (3.95 Å) x-ray lines using a newly installed crystal spectrometer with CCD detector in ECH, NBI and ICRF plasmas of Large Helical Device (LHD). The ion temperature obtained in a range of 0.6 and 3.5 kev was analysed with electron density and compared with electron temperature. A new parameter range of Ti > Te was found in low-density (ne < 1013 cm-3) H-minority ICRF discharges operated in the ion-heating regime (Pi ≥ Pe), whereas the ion temperature was roughly equal to the electron temperature in NBI discharges operated in the electron-heating regime (Pi < Pe). The ion temperature in the ICRF and ICRF + NBI discharges was correlated with the input power to bulk ions over the ion density (Pi/ni). As a result, a good correlation was obtained between them and it also indicated a clear rise of the ion temperature for the increasing Pi in a range of Pi/ni < 5 (MW/1013 cm-3).

AB - Ion temperature at the plasma centre has been measured from Doppler broadening of Ti XXI (2.61 Å) and Ar XVII (3.95 Å) x-ray lines using a newly installed crystal spectrometer with CCD detector in ECH, NBI and ICRF plasmas of Large Helical Device (LHD). The ion temperature obtained in a range of 0.6 and 3.5 kev was analysed with electron density and compared with electron temperature. A new parameter range of Ti > Te was found in low-density (ne < 1013 cm-3) H-minority ICRF discharges operated in the ion-heating regime (Pi ≥ Pe), whereas the ion temperature was roughly equal to the electron temperature in NBI discharges operated in the electron-heating regime (Pi < Pe). The ion temperature in the ICRF and ICRF + NBI discharges was correlated with the input power to bulk ions over the ion density (Pi/ni). As a result, a good correlation was obtained between them and it also indicated a clear rise of the ion temperature for the increasing Pi in a range of Pi/ni < 5 (MW/1013 cm-3).

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U2 - 10.1088/0029-5515/42/10/301

DO - 10.1088/0029-5515/42/10/301

M3 - Article

AN - SCOPUS:0036805912

VL - 42

SP - 1179

EP - 1183

JO - Nuclear Fusion

JF - Nuclear Fusion

SN - 0029-5515

IS - 10

ER -

Behaviour of ion temperature in electron and ion heating regimes observed with ECH, NBI and ICRF discharges of LHD

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