Measurement of ablation cloud parameters and plasma potential with on/off-axis pellet injection in the JIPP T-IIU tokamak

H. Sakakita; K. N. Sato; I. Nomura; Y. Hamada; A. Nishizawa; Y. Kawasumi; K. Ida; J. Xu; K. Narihara; K. Toi; A. Ejiri; T. Seki; K. Adachi; H. Iguchi; A. Fujisawa; R. Liang; M. Sakamoto; Y. Kano; S. Hirokura; S. Hidekuma; M. Kojima

doi:10.1016/S0920-3796(96)00655-2

Measurement of ablation cloud parameters and plasma potential with on/off-axis pellet injection in the JIPP T-IIU tokamak

H. Sakakita, K. N. Sato, I. Nomura, Y. Hamada, A. Nishizawa, Y. Kawasumi, K. Ida, J. Xu, K. Narihara, K. Toi, A. Ejiri, T. Seki, K. Adachi, H. Iguchi, A. Fujisawa, R. Liang, M. Sakamoto, Y. Kano, S. Hirokura, S. HidekumaM. Kojima

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

3 Citations (Scopus)

Abstract

A pellet injection system with controllability of the injection angle has been developed and installed in the JIPP T-IIU tokamak. A long helical ablation cloud ('tail') has been observed when an ice pellet is injected into the tokamak plasma using the controllable injection angle system. The 'tail' does not flow along the direction of the total magnetic field lines of the torus. In order to understand the details of the ice pellet ablation structure in the 'tail mode', the local parameters of electron density and temperature within the ablation cloud are obtained by a spectroscopic method. The electron density determined from Stark broadening of the Balmer β line is in the range 1.0 × 10¹⁶ - 1.0 × 10¹⁷ cm^-3, while the temperature obtained from the line-to-continuum intensity ratios is in the range 1-4 eV. It has also been observed by a heavy ion beam probe (HIBP) measurement that the potential at the plasma centre becomes more negative and the potential profile becomes deeper negatively after pellet injection

Original language	English
Pages (from-to)	329-332
Number of pages	4
Journal	Fusion Engineering and Design
Volume	34-35
DOIs	https://doi.org/10.1016/S0920-3796(96)00655-2
Publication status	Published - Mar 1997
Externally published	Yes

All Science Journal Classification (ASJC) codes

Civil and Structural Engineering
Nuclear Energy and Engineering
Materials Science(all)
Mechanical Engineering

Access to Document

10.1016/S0920-3796(96)00655-2

Cite this

Sakakita, H., Sato, K. N., Nomura, I., Hamada, Y., Nishizawa, A., Kawasumi, Y., Ida, K., Xu, J., Narihara, K., Toi, K., Ejiri, A., Seki, T., Adachi, K., Iguchi, H., Fujisawa, A., Liang, R., Sakamoto, M., Kano, Y., Hirokura, S., ... Kojima, M. (1997). Measurement of ablation cloud parameters and plasma potential with on/off-axis pellet injection in the JIPP T-IIU tokamak. Fusion Engineering and Design, 34-35, 329-332. https://doi.org/10.1016/S0920-3796(96)00655-2

Sakakita, H, Sato, KN, Nomura, I, Hamada, Y, Nishizawa, A, Kawasumi, Y, Ida, K, Xu, J, Narihara, K, Toi, K, Ejiri, A, Seki, T, Adachi, K, Iguchi, H, Fujisawa, A, Liang, R, Sakamoto, M, Kano, Y, Hirokura, S, Hidekuma, S & Kojima, M 1997, 'Measurement of ablation cloud parameters and plasma potential with on/off-axis pellet injection in the JIPP T-IIU tokamak', Fusion Engineering and Design, vol. 34-35, pp. 329-332. https://doi.org/10.1016/S0920-3796(96)00655-2

@article{199f7740934f4f1f80a06ca005f4eb5c,

title = "Measurement of ablation cloud parameters and plasma potential with on/off-axis pellet injection in the JIPP T-IIU tokamak",

abstract = "A pellet injection system with controllability of the injection angle has been developed and installed in the JIPP T-IIU tokamak. A long helical ablation cloud ('tail') has been observed when an ice pellet is injected into the tokamak plasma using the controllable injection angle system. The 'tail' does not flow along the direction of the total magnetic field lines of the torus. In order to understand the details of the ice pellet ablation structure in the 'tail mode', the local parameters of electron density and temperature within the ablation cloud are obtained by a spectroscopic method. The electron density determined from Stark broadening of the Balmer β line is in the range 1.0 × 1016 - 1.0 × 1017 cm-3, while the temperature obtained from the line-to-continuum intensity ratios is in the range 1-4 eV. It has also been observed by a heavy ion beam probe (HIBP) measurement that the potential at the plasma centre becomes more negative and the potential profile becomes deeper negatively after pellet injection",

author = "H. Sakakita and Sato, {K. N.} and I. Nomura and Y. Hamada and A. Nishizawa and Y. Kawasumi and K. Ida and J. Xu and K. Narihara and K. Toi and A. Ejiri and T. Seki and K. Adachi and H. Iguchi and A. Fujisawa and R. Liang and M. Sakamoto and Y. Kano and S. Hirokura and S. Hidekuma and M. Kojima",

year = "1997",

month = mar,

doi = "10.1016/S0920-3796(96)00655-2",

language = "English",

volume = "34-35",

pages = "329--332",

journal = "Fusion Engineering and Design",

issn = "0920-3796",

publisher = "Elsevier BV",

}

TY - JOUR

T1 - Measurement of ablation cloud parameters and plasma potential with on/off-axis pellet injection in the JIPP T-IIU tokamak

AU - Sakakita, H.

AU - Sato, K. N.

AU - Nomura, I.

AU - Hamada, Y.

AU - Nishizawa, A.

AU - Kawasumi, Y.

AU - Ida, K.

AU - Xu, J.

AU - Narihara, K.

AU - Toi, K.

AU - Ejiri, A.

AU - Seki, T.

AU - Adachi, K.

AU - Iguchi, H.

AU - Fujisawa, A.

AU - Liang, R.

AU - Sakamoto, M.

AU - Kano, Y.

AU - Hirokura, S.

AU - Hidekuma, S.

AU - Kojima, M.

PY - 1997/3

Y1 - 1997/3

N2 - A pellet injection system with controllability of the injection angle has been developed and installed in the JIPP T-IIU tokamak. A long helical ablation cloud ('tail') has been observed when an ice pellet is injected into the tokamak plasma using the controllable injection angle system. The 'tail' does not flow along the direction of the total magnetic field lines of the torus. In order to understand the details of the ice pellet ablation structure in the 'tail mode', the local parameters of electron density and temperature within the ablation cloud are obtained by a spectroscopic method. The electron density determined from Stark broadening of the Balmer β line is in the range 1.0 × 1016 - 1.0 × 1017 cm-3, while the temperature obtained from the line-to-continuum intensity ratios is in the range 1-4 eV. It has also been observed by a heavy ion beam probe (HIBP) measurement that the potential at the plasma centre becomes more negative and the potential profile becomes deeper negatively after pellet injection

AB - A pellet injection system with controllability of the injection angle has been developed and installed in the JIPP T-IIU tokamak. A long helical ablation cloud ('tail') has been observed when an ice pellet is injected into the tokamak plasma using the controllable injection angle system. The 'tail' does not flow along the direction of the total magnetic field lines of the torus. In order to understand the details of the ice pellet ablation structure in the 'tail mode', the local parameters of electron density and temperature within the ablation cloud are obtained by a spectroscopic method. The electron density determined from Stark broadening of the Balmer β line is in the range 1.0 × 1016 - 1.0 × 1017 cm-3, while the temperature obtained from the line-to-continuum intensity ratios is in the range 1-4 eV. It has also been observed by a heavy ion beam probe (HIBP) measurement that the potential at the plasma centre becomes more negative and the potential profile becomes deeper negatively after pellet injection

UR - http://www.scopus.com/inward/record.url?scp=18844472345&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=18844472345&partnerID=8YFLogxK

U2 - 10.1016/S0920-3796(96)00655-2

DO - 10.1016/S0920-3796(96)00655-2

M3 - Article

AN - SCOPUS:18844472345

SN - 0920-3796

VL - 34-35

SP - 329

EP - 332

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

ER -

Measurement of ablation cloud parameters and plasma potential with on/off-axis pellet injection in the JIPP T-IIU tokamak

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this