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 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).
| Original language | English |
|---|---|
| Pages (from-to) | 1179-1183 |
| Number of pages | 5 |
| Journal | Nuclear Fusion |
| Volume | 42 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - Oct 1 2002 |
| Externally published | Yes |
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All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
- Condensed Matter Physics
Cite this
Behaviour of ion temperature in electron and ion heating regimes observed with ECH, NBI and ICRF discharges of LHD. / Morita, S.; Goto, M.; Kubo, S.; Murakami, S.; Narihara, K.; Osakabe, M.; Seki, T.; Takeiri, Y.; Tanaka, K.; Yamada, H.; Funaba, H.; Idei, Hiroshi; Ida, K.; Ikeda, K.; Shigeru, Inagaki; 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, B. J.; Sakakibara, S.; Sakamoto, R.; Sasao, M.; Sato, K.; Shimozuma, T.; Shoji, M.; Suzuki, H.; Toi, K.; Tokuzawa, T.; Tsumori, K.; Watanabe, K. Y.; Watari, T.; Yamada, I.
In: Nuclear Fusion, Vol. 42, No. 10, 01.10.2002, p. 1179-1183.Research output: Contribution to journal › Article
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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, Hiroshi
AU - Ida, K.
AU - Ikeda, K.
AU - Shigeru, Inagaki
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 -