5-D simulation study of suprathermal electron transport in non-axisymmetric plasmas

S. Murakami, U. Gasparino, Hiroshi Idei, S. Kubo, H. Maassberg, N. Marushchenko, N. Nakajima, M. Romé, M. Okamoto

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

ECRH driven transport of suprathermal electrons is studied in non-axisymmetric plasmas using a new Monte Carlo simulation technique in 5-D phase space. Two different phases of the ECRH driven transport of suprathermal electrons can be seen. The first is a rapid convective phase due to the direct radial motion of trapped electrons and the second is a slower phase due to the collisional transport. The important role of the radial transport of suprathermal electrons in the broadening of the ECRH deposition profile in W7-AS is clarified. The ECRH driven flux is also evaluated and considered in relation to the `electron root' feature recently observed in W7-AS. It is found that, at low collisionalities, the ECRH driven flux due to the suprathermal electrons can play a dominant role in the condition of ambipolarity, and thus the observed electron root feature in W7-AS is thought to be driven by the radial (convective) flux of ECRH generated suprathermal electrons. A possible scenario for this type of electron root is considered for the LHD plasma.

Original languageEnglish
Pages (from-to)693-700
Number of pages8
JournalNuclear Fusion
Volume40
Issue numberSPEC. ISS. 3
DOIs
Publication statusPublished - Jan 1 2000

Fingerprint

electrons
simulation
profiles

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

Cite this

Murakami, S., Gasparino, U., Idei, H., Kubo, S., Maassberg, H., Marushchenko, N., ... Okamoto, M. (2000). 5-D simulation study of suprathermal electron transport in non-axisymmetric plasmas. Nuclear Fusion, 40(SPEC. ISS. 3), 693-700. https://doi.org/10.1088/0029-5515/40/3Y/333

5-D simulation study of suprathermal electron transport in non-axisymmetric plasmas. / Murakami, S.; Gasparino, U.; Idei, Hiroshi; Kubo, S.; Maassberg, H.; Marushchenko, N.; Nakajima, N.; Romé, M.; Okamoto, M.

In: Nuclear Fusion, Vol. 40, No. SPEC. ISS. 3, 01.01.2000, p. 693-700.

Research output: Contribution to journalArticle

Murakami, S, Gasparino, U, Idei, H, Kubo, S, Maassberg, H, Marushchenko, N, Nakajima, N, Romé, M & Okamoto, M 2000, '5-D simulation study of suprathermal electron transport in non-axisymmetric plasmas', Nuclear Fusion, vol. 40, no. SPEC. ISS. 3, pp. 693-700. https://doi.org/10.1088/0029-5515/40/3Y/333
Murakami S, Gasparino U, Idei H, Kubo S, Maassberg H, Marushchenko N et al. 5-D simulation study of suprathermal electron transport in non-axisymmetric plasmas. Nuclear Fusion. 2000 Jan 1;40(SPEC. ISS. 3):693-700. https://doi.org/10.1088/0029-5515/40/3Y/333
Murakami, S. ; Gasparino, U. ; Idei, Hiroshi ; Kubo, S. ; Maassberg, H. ; Marushchenko, N. ; Nakajima, N. ; Romé, M. ; Okamoto, M. / 5-D simulation study of suprathermal electron transport in non-axisymmetric plasmas. In: Nuclear Fusion. 2000 ; Vol. 40, No. SPEC. ISS. 3. pp. 693-700.
@article{e1e2b1d9f75441279e45f693b0f0c212,
title = "5-D simulation study of suprathermal electron transport in non-axisymmetric plasmas",
abstract = "ECRH driven transport of suprathermal electrons is studied in non-axisymmetric plasmas using a new Monte Carlo simulation technique in 5-D phase space. Two different phases of the ECRH driven transport of suprathermal electrons can be seen. The first is a rapid convective phase due to the direct radial motion of trapped electrons and the second is a slower phase due to the collisional transport. The important role of the radial transport of suprathermal electrons in the broadening of the ECRH deposition profile in W7-AS is clarified. The ECRH driven flux is also evaluated and considered in relation to the `electron root' feature recently observed in W7-AS. It is found that, at low collisionalities, the ECRH driven flux due to the suprathermal electrons can play a dominant role in the condition of ambipolarity, and thus the observed electron root feature in W7-AS is thought to be driven by the radial (convective) flux of ECRH generated suprathermal electrons. A possible scenario for this type of electron root is considered for the LHD plasma.",
author = "S. Murakami and U. Gasparino and Hiroshi Idei and S. Kubo and H. Maassberg and N. Marushchenko and N. Nakajima and M. Rom{\'e} and M. Okamoto",
year = "2000",
month = "1",
day = "1",
doi = "10.1088/0029-5515/40/3Y/333",
language = "English",
volume = "40",
pages = "693--700",
journal = "Nuclear Fusion",
issn = "0029-5515",
publisher = "IOP Publishing Ltd.",
number = "SPEC. ISS. 3",

}

TY - JOUR

T1 - 5-D simulation study of suprathermal electron transport in non-axisymmetric plasmas

AU - Murakami, S.

AU - Gasparino, U.

AU - Idei, Hiroshi

AU - Kubo, S.

AU - Maassberg, H.

AU - Marushchenko, N.

AU - Nakajima, N.

AU - Romé, M.

AU - Okamoto, M.

PY - 2000/1/1

Y1 - 2000/1/1

N2 - ECRH driven transport of suprathermal electrons is studied in non-axisymmetric plasmas using a new Monte Carlo simulation technique in 5-D phase space. Two different phases of the ECRH driven transport of suprathermal electrons can be seen. The first is a rapid convective phase due to the direct radial motion of trapped electrons and the second is a slower phase due to the collisional transport. The important role of the radial transport of suprathermal electrons in the broadening of the ECRH deposition profile in W7-AS is clarified. The ECRH driven flux is also evaluated and considered in relation to the `electron root' feature recently observed in W7-AS. It is found that, at low collisionalities, the ECRH driven flux due to the suprathermal electrons can play a dominant role in the condition of ambipolarity, and thus the observed electron root feature in W7-AS is thought to be driven by the radial (convective) flux of ECRH generated suprathermal electrons. A possible scenario for this type of electron root is considered for the LHD plasma.

AB - ECRH driven transport of suprathermal electrons is studied in non-axisymmetric plasmas using a new Monte Carlo simulation technique in 5-D phase space. Two different phases of the ECRH driven transport of suprathermal electrons can be seen. The first is a rapid convective phase due to the direct radial motion of trapped electrons and the second is a slower phase due to the collisional transport. The important role of the radial transport of suprathermal electrons in the broadening of the ECRH deposition profile in W7-AS is clarified. The ECRH driven flux is also evaluated and considered in relation to the `electron root' feature recently observed in W7-AS. It is found that, at low collisionalities, the ECRH driven flux due to the suprathermal electrons can play a dominant role in the condition of ambipolarity, and thus the observed electron root feature in W7-AS is thought to be driven by the radial (convective) flux of ECRH generated suprathermal electrons. A possible scenario for this type of electron root is considered for the LHD plasma.

UR - http://www.scopus.com/inward/record.url?scp=0033901035&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033901035&partnerID=8YFLogxK

U2 - 10.1088/0029-5515/40/3Y/333

DO - 10.1088/0029-5515/40/3Y/333

M3 - Article

VL - 40

SP - 693

EP - 700

JO - Nuclear Fusion

JF - Nuclear Fusion

SN - 0029-5515

IS - SPEC. ISS. 3

ER -