Energetic particle physics in JT-60U and JFT-2M

K. Shinohara; M. Takechi; M. Ishikawa; Y. Kusama; K. Tsuzuki; K. Urata; H. Kawashima; K. Tobita; A. Fukuyama; C. Z. Cheng; D. S. Darrow; G. J. Kramer; N. N. Gorelenkov; R. Nazikian; Y. Todo; Y. Miura; T. Ozeki

doi:10.1088/0741-3335/46/7/S03

Energetic particle physics in JT-60U and JFT-2M

K. Shinohara
, M. Takechi
, M. Ishikawa
, Y. Kusama
, K. Tsuzuki
, K. Urata
, H. Kawashima
, K. Tobita
, A. Fukuyama
, C. Z. Cheng
, D. S. Darrow
, G. J. Kramer
, N. N. Gorelenkov
, R. Nazikian
, Y. Todo
, Y. Miura
, T. Ozeki

Research output: Contribution to journal › Article › peer-review

47 Scopus citations

Abstract

Recent energetic particle physics research in JT-60U and JFT-2M is reported. Alfvén eigenmodes (AEs) are investigated in reversed-shear (RS) plasmas in JT-60U where frequency sweeping (FS) modes are observed to follow the q-profile evolution. The RS-induced AE model can explain the FS of the modes within the context of an evolving q-profile. Enhanced energetic ion transport is also investigated with the appearance of modes in the toroidicityinduced AE range of frequency in JT-60U using a multi-channel neutron profile monitor and in JFT-2M using a lost ion probe. Additionally, the ripple loss in the complex toroidal field ripple due to ferritic steel inserts in JFT-2M is shown and compared with model analysis. The simulation code developed to predict ripple loss in JFT-2M will be of use in estimating the heat flux in the complex ripple field of a future device such as ITER.

Original language	English (US)
Pages (from-to)	S31-S45
Journal	Plasma Physics and Controlled Fusion
Volume	46
Issue number	7
DOIs	https://doi.org/10.1088/0741-3335/46/7/S03
State	Published - Jul 2004

All Science Journal Classification (ASJC) codes

Nuclear Energy and Engineering
Condensed Matter Physics

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10.1088/0741-3335/46/7/S03

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Shinohara, K., Takechi, M., Ishikawa, M., Kusama, Y., Tsuzuki, K., Urata, K., Kawashima, H., Tobita, K., Fukuyama, A., Cheng, C. Z., Darrow, D. S., Kramer, G. J., Gorelenkov, N. N., Nazikian, R., Todo, Y., Miura, Y., & Ozeki, T. (2004). Energetic particle physics in JT-60U and JFT-2M. Plasma Physics and Controlled Fusion, 46(7), S31-S45. https://doi.org/10.1088/0741-3335/46/7/S03

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title = "Energetic particle physics in JT-60U and JFT-2M",

abstract = "Recent energetic particle physics research in JT-60U and JFT-2M is reported. Alfv{\'e}n eigenmodes (AEs) are investigated in reversed-shear (RS) plasmas in JT-60U where frequency sweeping (FS) modes are observed to follow the q-profile evolution. The RS-induced AE model can explain the FS of the modes within the context of an evolving q-profile. Enhanced energetic ion transport is also investigated with the appearance of modes in the toroidicityinduced AE range of frequency in JT-60U using a multi-channel neutron profile monitor and in JFT-2M using a lost ion probe. Additionally, the ripple loss in the complex toroidal field ripple due to ferritic steel inserts in JFT-2M is shown and compared with model analysis. The simulation code developed to predict ripple loss in JFT-2M will be of use in estimating the heat flux in the complex ripple field of a future device such as ITER.",

author = "K. Shinohara and M. Takechi and M. Ishikawa and Y. Kusama and K. Tsuzuki and K. Urata and H. Kawashima and K. Tobita and A. Fukuyama and Cheng, \{C. Z.\} and Darrow, \{D. S.\} and Kramer, \{G. J.\} and Gorelenkov, \{N. N.\} and R. Nazikian and Y. Todo and Y. Miura and T. Ozeki",

year = "2004",

month = jul,

doi = "10.1088/0741-3335/46/7/S03",

language = "English (US)",

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AU - Takechi, M.

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AU - Kusama, Y.

AU - Tsuzuki, K.

AU - Urata, K.

AU - Kawashima, H.

AU - Tobita, K.

AU - Fukuyama, A.

AU - Cheng, C. Z.

AU - Darrow, D. S.

AU - Kramer, G. J.

AU - Gorelenkov, N. N.

AU - Nazikian, R.

AU - Todo, Y.

AU - Miura, Y.

AU - Ozeki, T.

PY - 2004/7

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N2 - Recent energetic particle physics research in JT-60U and JFT-2M is reported. Alfvén eigenmodes (AEs) are investigated in reversed-shear (RS) plasmas in JT-60U where frequency sweeping (FS) modes are observed to follow the q-profile evolution. The RS-induced AE model can explain the FS of the modes within the context of an evolving q-profile. Enhanced energetic ion transport is also investigated with the appearance of modes in the toroidicityinduced AE range of frequency in JT-60U using a multi-channel neutron profile monitor and in JFT-2M using a lost ion probe. Additionally, the ripple loss in the complex toroidal field ripple due to ferritic steel inserts in JFT-2M is shown and compared with model analysis. The simulation code developed to predict ripple loss in JFT-2M will be of use in estimating the heat flux in the complex ripple field of a future device such as ITER.

AB - Recent energetic particle physics research in JT-60U and JFT-2M is reported. Alfvén eigenmodes (AEs) are investigated in reversed-shear (RS) plasmas in JT-60U where frequency sweeping (FS) modes are observed to follow the q-profile evolution. The RS-induced AE model can explain the FS of the modes within the context of an evolving q-profile. Enhanced energetic ion transport is also investigated with the appearance of modes in the toroidicityinduced AE range of frequency in JT-60U using a multi-channel neutron profile monitor and in JFT-2M using a lost ion probe. Additionally, the ripple loss in the complex toroidal field ripple due to ferritic steel inserts in JFT-2M is shown and compared with model analysis. The simulation code developed to predict ripple loss in JFT-2M will be of use in estimating the heat flux in the complex ripple field of a future device such as ITER.

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JO - Plasma Physics and Controlled Fusion

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Energetic particle physics in JT-60U and JFT-2M

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