Impact of nonlocal electron heat transport on the high temperature plasmas of LHD

N. Tamura, Inagaki Shigeru, K. Tanaka, C. Michael, T. Tokuzawa, T. Shimozuma, S. Kubo, R. Sakamoto, K. Ida, K. Itoh, D. Kalinina, S. Sudo, Y. Nagayama, K. Kawahata, A. Komori

Research output: Contribution to journalArticle

53 Citations (Scopus)

Abstract

Edge cooling experiments with a tracer-encapsulated solid pellet in the large helical device (LHD) show a significant rise in core electron temperature (the maximum rise is around 1 keV) as well as in many tokamaks. This experimental result indicates the possible presence of the nonlocality of electron heat transport in plasmas where turbulence as a cause of anomalous transport dominates. The nonlocal electron temperature rise in the LHD takes place in almost the same parametric domain (e.g. in a low density) as in the tokamaks. Meanwhile, the experimental results of LHD show some new aspects of nonlocal electron temperature rise, for example the delay in the nonlocal rise of core electron temperature relative to the pellet penetration time increases with the increase both in the collisionality in the core plasma and the electron temperature gradient scale length in the outer region of the plasma.

Original languageEnglish
Pages (from-to)449-455
Number of pages7
JournalNuclear Fusion
Volume47
Issue number5
DOIs
Publication statusPublished - Dec 1 2007

Fingerprint

high temperature plasmas
electron energy
heat
electrons
pellets
plasma turbulence
tracers
temperature gradients
penetration
cooling
causes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

Cite this

Tamura, N., Shigeru, I., Tanaka, K., Michael, C., Tokuzawa, T., Shimozuma, T., ... Komori, A. (2007). Impact of nonlocal electron heat transport on the high temperature plasmas of LHD. Nuclear Fusion, 47(5), 449-455. https://doi.org/10.1088/0029-5515/47/5/009

Impact of nonlocal electron heat transport on the high temperature plasmas of LHD. / Tamura, N.; Shigeru, Inagaki; Tanaka, K.; Michael, C.; Tokuzawa, T.; Shimozuma, T.; Kubo, S.; Sakamoto, R.; Ida, K.; Itoh, K.; Kalinina, D.; Sudo, S.; Nagayama, Y.; Kawahata, K.; Komori, A.

In: Nuclear Fusion, Vol. 47, No. 5, 01.12.2007, p. 449-455.

Research output: Contribution to journalArticle

Tamura, N, Shigeru, I, Tanaka, K, Michael, C, Tokuzawa, T, Shimozuma, T, Kubo, S, Sakamoto, R, Ida, K, Itoh, K, Kalinina, D, Sudo, S, Nagayama, Y, Kawahata, K & Komori, A 2007, 'Impact of nonlocal electron heat transport on the high temperature plasmas of LHD', Nuclear Fusion, vol. 47, no. 5, pp. 449-455. https://doi.org/10.1088/0029-5515/47/5/009
Tamura, N. ; Shigeru, Inagaki ; Tanaka, K. ; Michael, C. ; Tokuzawa, T. ; Shimozuma, T. ; Kubo, S. ; Sakamoto, R. ; Ida, K. ; Itoh, K. ; Kalinina, D. ; Sudo, S. ; Nagayama, Y. ; Kawahata, K. ; Komori, A. / Impact of nonlocal electron heat transport on the high temperature plasmas of LHD. In: Nuclear Fusion. 2007 ; Vol. 47, No. 5. pp. 449-455.
@article{68b3b9a3bbd94ef6b7647ee85b451e69,
title = "Impact of nonlocal electron heat transport on the high temperature plasmas of LHD",
abstract = "Edge cooling experiments with a tracer-encapsulated solid pellet in the large helical device (LHD) show a significant rise in core electron temperature (the maximum rise is around 1 keV) as well as in many tokamaks. This experimental result indicates the possible presence of the nonlocality of electron heat transport in plasmas where turbulence as a cause of anomalous transport dominates. The nonlocal electron temperature rise in the LHD takes place in almost the same parametric domain (e.g. in a low density) as in the tokamaks. Meanwhile, the experimental results of LHD show some new aspects of nonlocal electron temperature rise, for example the delay in the nonlocal rise of core electron temperature relative to the pellet penetration time increases with the increase both in the collisionality in the core plasma and the electron temperature gradient scale length in the outer region of the plasma.",
author = "N. Tamura and Inagaki Shigeru and K. Tanaka and C. Michael and T. Tokuzawa and T. Shimozuma and S. Kubo and R. Sakamoto and K. Ida and K. Itoh and D. Kalinina and S. Sudo and Y. Nagayama and K. Kawahata and A. Komori",
year = "2007",
month = "12",
day = "1",
doi = "10.1088/0029-5515/47/5/009",
language = "English",
volume = "47",
pages = "449--455",
journal = "Nuclear Fusion",
issn = "0029-5515",
publisher = "IOP Publishing Ltd.",
number = "5",

}

TY - JOUR

T1 - Impact of nonlocal electron heat transport on the high temperature plasmas of LHD

AU - Tamura, N.

AU - Shigeru, Inagaki

AU - Tanaka, K.

AU - Michael, C.

AU - Tokuzawa, T.

AU - Shimozuma, T.

AU - Kubo, S.

AU - Sakamoto, R.

AU - Ida, K.

AU - Itoh, K.

AU - Kalinina, D.

AU - Sudo, S.

AU - Nagayama, Y.

AU - Kawahata, K.

AU - Komori, A.

PY - 2007/12/1

Y1 - 2007/12/1

N2 - Edge cooling experiments with a tracer-encapsulated solid pellet in the large helical device (LHD) show a significant rise in core electron temperature (the maximum rise is around 1 keV) as well as in many tokamaks. This experimental result indicates the possible presence of the nonlocality of electron heat transport in plasmas where turbulence as a cause of anomalous transport dominates. The nonlocal electron temperature rise in the LHD takes place in almost the same parametric domain (e.g. in a low density) as in the tokamaks. Meanwhile, the experimental results of LHD show some new aspects of nonlocal electron temperature rise, for example the delay in the nonlocal rise of core electron temperature relative to the pellet penetration time increases with the increase both in the collisionality in the core plasma and the electron temperature gradient scale length in the outer region of the plasma.

AB - Edge cooling experiments with a tracer-encapsulated solid pellet in the large helical device (LHD) show a significant rise in core electron temperature (the maximum rise is around 1 keV) as well as in many tokamaks. This experimental result indicates the possible presence of the nonlocality of electron heat transport in plasmas where turbulence as a cause of anomalous transport dominates. The nonlocal electron temperature rise in the LHD takes place in almost the same parametric domain (e.g. in a low density) as in the tokamaks. Meanwhile, the experimental results of LHD show some new aspects of nonlocal electron temperature rise, for example the delay in the nonlocal rise of core electron temperature relative to the pellet penetration time increases with the increase both in the collisionality in the core plasma and the electron temperature gradient scale length in the outer region of the plasma.

UR - http://www.scopus.com/inward/record.url?scp=55349090933&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=55349090933&partnerID=8YFLogxK

U2 - 10.1088/0029-5515/47/5/009

DO - 10.1088/0029-5515/47/5/009

M3 - Article

AN - SCOPUS:55349090933

VL - 47

SP - 449

EP - 455

JO - Nuclear Fusion

JF - Nuclear Fusion

SN - 0029-5515

IS - 5

ER -