Transient transport analysis of improved confinement plasmas in LHD

K. Ida; S. Inagaki; R. Sakamoto; N. Tamura; K. Tanaka; H. Funaba; S. Morita; Y. Takeiri; K. Ikeda; T. Shimozuma; S. Kubo; C. Michel; T. Tokuzawa; O. Kaneko; A. Komori; O. Motojima

Transient transport analysis of improved confinement plasmas in LHD

K. Ida, S. Inagaki, R. Sakamoto, N. Tamura, K. Tanaka, H. Funaba, S. Morita, Y. Takeiri, K. Ikeda, T. Shimozuma, S. Kubo, C. Michel, T. Tokuzawa, O. Kaneko, A. Komori, O. Motojima

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The transient transport analysis applied to the improved modes in LHD clearly show a bifurcation characteristics both in the inner and outer region of the plasma. The transient bifurcation of transport appears in the inner region of the plasma (r < a/2) after the TESPEL injection as a drop of heat flux associated with the spontaneous rise of electron temperature. in the with ITB and also outer region of the plasma in the pellet enhanced mode. The region where the bifurcation appears is consistent with the region where the ITB appears. The other bifurcation between gyro-Bhom transport and a weak temperature dependent transport is observed after the repetitive pellet injection in the outer region of the plasma [r > (2/3)a]. The time trace of heat flux and temperature gradient shows a negative transient thermal diffusivity, which is a clear evidence of bifurcation of transport.

Original language	English
Title of host publication	32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts
Pages	45-48
Number of pages	4
Publication status	Published - Dec 1 2005
Externally published	Yes
Event	32nd European Physical Society Conference on Plasma Physics and Controlled Fusion combined with the 8th International Workshop on Fast Ignition of Fusion Targets - Tarragona, Spain Duration: Jun 27 2005 → Jul 1 2005

Publication series

Name	32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts
Volume	1

Other

Other	32nd European Physical Society Conference on Plasma Physics and Controlled Fusion combined with the 8th International Workshop on Fast Ignition of Fusion Targets
Country/Territory	Spain
City	Tarragona
Period	6/27/05 → 7/1/05

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

Cite this

Ida, K., Inagaki, S., Sakamoto, R., Tamura, N., Tanaka, K., Funaba, H., Morita, S., Takeiri, Y., Ikeda, K., Shimozuma, T., Kubo, S., Michel, C., Tokuzawa, T., Kaneko, O., Komori, A., & Motojima, O. (2005). Transient transport analysis of improved confinement plasmas in LHD. In 32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts (pp. 45-48). (32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts; Vol. 1).

Transient transport analysis of improved confinement plasmas in LHD. / Ida, K.; Inagaki, S.; Sakamoto, R. et al.

32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts. 2005. p. 45-48 (32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts; Vol. 1).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Ida, K, Inagaki, S, Sakamoto, R, Tamura, N, Tanaka, K, Funaba, H, Morita, S, Takeiri, Y, Ikeda, K, Shimozuma, T, Kubo, S, Michel, C, Tokuzawa, T, Kaneko, O, Komori, A & Motojima, O 2005, Transient transport analysis of improved confinement plasmas in LHD. in 32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts. 32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts, vol. 1, pp. 45-48, 32nd European Physical Society Conference on Plasma Physics and Controlled Fusion combined with the 8th International Workshop on Fast Ignition of Fusion Targets, Tarragona, Spain, 6/27/05.

Ida K, Inagaki S, Sakamoto R, Tamura N, Tanaka K, Funaba H et al. Transient transport analysis of improved confinement plasmas in LHD. In 32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts. 2005. p. 45-48. (32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts).

Ida, K. ; Inagaki, S. ; Sakamoto, R. et al. / Transient transport analysis of improved confinement plasmas in LHD. 32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts. 2005. pp. 45-48 (32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts).

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abstract = "The transient transport analysis applied to the improved modes in LHD clearly show a bifurcation characteristics both in the inner and outer region of the plasma. The transient bifurcation of transport appears in the inner region of the plasma (r < a/2) after the TESPEL injection as a drop of heat flux associated with the spontaneous rise of electron temperature. in the with ITB and also outer region of the plasma in the pellet enhanced mode. The region where the bifurcation appears is consistent with the region where the ITB appears. The other bifurcation between gyro-Bhom transport and a weak temperature dependent transport is observed after the repetitive pellet injection in the outer region of the plasma [r > (2/3)a]. The time trace of heat flux and temperature gradient shows a negative transient thermal diffusivity, which is a clear evidence of bifurcation of transport.",

author = "K. Ida and S. Inagaki and R. Sakamoto and N. Tamura and K. Tanaka and H. Funaba and S. Morita and Y. Takeiri and K. Ikeda and T. Shimozuma and S. Kubo and C. Michel and T. Tokuzawa and O. Kaneko and A. Komori and O. Motojima",

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T1 - Transient transport analysis of improved confinement plasmas in LHD

AU - Ida, K.

AU - Inagaki, S.

AU - Sakamoto, R.

AU - Tamura, N.

AU - Tanaka, K.

AU - Funaba, H.

AU - Morita, S.

AU - Takeiri, Y.

AU - Ikeda, K.

AU - Shimozuma, T.

AU - Kubo, S.

AU - Michel, C.

AU - Tokuzawa, T.

AU - Kaneko, O.

AU - Komori, A.

AU - Motojima, O.

PY - 2005/12/1

Y1 - 2005/12/1

N2 - The transient transport analysis applied to the improved modes in LHD clearly show a bifurcation characteristics both in the inner and outer region of the plasma. The transient bifurcation of transport appears in the inner region of the plasma (r < a/2) after the TESPEL injection as a drop of heat flux associated with the spontaneous rise of electron temperature. in the with ITB and also outer region of the plasma in the pellet enhanced mode. The region where the bifurcation appears is consistent with the region where the ITB appears. The other bifurcation between gyro-Bhom transport and a weak temperature dependent transport is observed after the repetitive pellet injection in the outer region of the plasma [r > (2/3)a]. The time trace of heat flux and temperature gradient shows a negative transient thermal diffusivity, which is a clear evidence of bifurcation of transport.

AB - The transient transport analysis applied to the improved modes in LHD clearly show a bifurcation characteristics both in the inner and outer region of the plasma. The transient bifurcation of transport appears in the inner region of the plasma (r < a/2) after the TESPEL injection as a drop of heat flux associated with the spontaneous rise of electron temperature. in the with ITB and also outer region of the plasma in the pellet enhanced mode. The region where the bifurcation appears is consistent with the region where the ITB appears. The other bifurcation between gyro-Bhom transport and a weak temperature dependent transport is observed after the repetitive pellet injection in the outer region of the plasma [r > (2/3)a]. The time trace of heat flux and temperature gradient shows a negative transient thermal diffusivity, which is a clear evidence of bifurcation of transport.

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BT - 32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts

T2 - 32nd European Physical Society Conference on Plasma Physics and Controlled Fusion combined with the 8th International Workshop on Fast Ignition of Fusion Targets

Y2 - 27 June 2005 through 1 July 2005

ER -

Transient transport analysis of improved confinement plasmas in LHD

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