Theoretical analysis of the ECH effect on the energetic particle driven modes stability in Heliotron J

J. Varela; K. Nagasaki; K. Nagaoka; S. Yamamoto; D. Spong; L. Garcia; A. Cappa; K. Y. Watanabe

Theoretical analysis of the ECH effect on the energetic particle driven modes stability in Heliotron J

J. Varela, K. Nagasaki, K. Nagaoka, S. Yamamoto, D. Spong, L. Garcia, A. Cappa, K. Y. Watanabe

Plasma Theory and Modeling

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

Abstract

The aim of the study is to analyze the stability of the Energetic Particle Modes (EPM) and Alfven Eigenmodes (AE) in Heliotron J if the electron cyclotron heating (ECH) is applied. The analysis is performed using the code FAR3d [1]. The simulations indicate that the modes with the largest growth rate in the Heliotron J high bumpiness (HB) and medium bumpiness (MB) magnetic configurations are n/m = 1/2 and 2/4 global AE (GAE). On the other hand, the simulations for the low bumpiness (LB) configurations show the destabilization of 1/2 EPM and 2/4 GAE. The simulations for LB configuration show a dominant stabilizing effect of the continuum damping with respect to the increase of the EP β as T_e increases. On the other hand, the simulations for the HB and MB configurations indicate that the further destabilization of the AE/EPM caused by the increase of the EP β with T_e is larger with respect to the stabilizing effect of the continuum damping.

Original language	English
Title of host publication	47th EPS Conference on Plasma Physics, EPS 2021
Publisher	European Physical Society (EPS)
Pages	836-839
Number of pages	4
ISBN (Electronic)	9781713837046
State	Published - 2021
Event	47th EPS Conference on Plasma Physics, EPS 2021 - Sitges, Spain Duration: Jun 21 2021 → Jun 25 2021

Publication series

Name	47th EPS Conference on Plasma Physics, EPS 2021
Volume	2021-June

Conference

Conference	47th EPS Conference on Plasma Physics, EPS 2021
Country/Territory	Spain
City	Sitges
Period	06/21/21 → 06/25/21

Funding

This work is supported by the projects 2019-T1/AMB-13648 (Comunidad de Madrid), NIFS Collaboratvie Research Program NIFS08KAOR010,NFIS10KUHL030, NIFS07KLPH004 and "PLADyS" JSPS Core-to-Core Program, A. AdvancedResearch Networks and by multiannual agreement with UC3M (“Excelencia para el Profesorado Universitario” - EPUC3M14 ) - Fifth regional research plan 2016-2020 Comunidad de Madrid (Spain).

Funders	Funder number
Comunidad de Madrid	NIFS07KLPH004, NIFS08KAOR010, NFIS10KUHL030
Japan Society for the Promotion of Science	EPUC3M14

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Cite this

Varela, J., Nagasaki, K., Nagaoka, K., Yamamoto, S., Spong, D., Garcia, L., Cappa, A., & Watanabe, K. Y. (2021). Theoretical analysis of the ECH effect on the energetic particle driven modes stability in Heliotron J. In 47th EPS Conference on Plasma Physics, EPS 2021 (pp. 836-839). (47th EPS Conference on Plasma Physics, EPS 2021; Vol. 2021-June). European Physical Society (EPS).

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title = "Theoretical analysis of the ECH effect on the energetic particle driven modes stability in Heliotron J",

abstract = "The aim of the study is to analyze the stability of the Energetic Particle Modes (EPM) and Alfven Eigenmodes (AE) in Heliotron J if the electron cyclotron heating (ECH) is applied. The analysis is performed using the code FAR3d [1]. The simulations indicate that the modes with the largest growth rate in the Heliotron J high bumpiness (HB) and medium bumpiness (MB) magnetic configurations are n/m = 1/2 and 2/4 global AE (GAE). On the other hand, the simulations for the low bumpiness (LB) configurations show the destabilization of 1/2 EPM and 2/4 GAE. The simulations for LB configuration show a dominant stabilizing effect of the continuum damping with respect to the increase of the EP β as Te increases. On the other hand, the simulations for the HB and MB configurations indicate that the further destabilization of the AE/EPM caused by the increase of the EP β with Te is larger with respect to the stabilizing effect of the continuum damping.",

author = "J. Varela and K. Nagasaki and K. Nagaoka and S. Yamamoto and D. Spong and L. Garcia and A. Cappa and Watanabe, {K. Y.}",

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year = "2021",

language = "English",

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Varela, J, Nagasaki, K, Nagaoka, K, Yamamoto, S, Spong, D, Garcia, L, Cappa, A & Watanabe, KY 2021, Theoretical analysis of the ECH effect on the energetic particle driven modes stability in Heliotron J. in 47th EPS Conference on Plasma Physics, EPS 2021. 47th EPS Conference on Plasma Physics, EPS 2021, vol. 2021-June, European Physical Society (EPS), pp. 836-839, 47th EPS Conference on Plasma Physics, EPS 2021, Sitges, Spain, 06/21/21.

Theoretical analysis of the ECH effect on the energetic particle driven modes stability in Heliotron J. / Varela, J.; Nagasaki, K.; Nagaoka, K. et al.
47th EPS Conference on Plasma Physics, EPS 2021. European Physical Society (EPS), 2021. p. 836-839 (47th EPS Conference on Plasma Physics, EPS 2021; Vol. 2021-June).

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

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T1 - Theoretical analysis of the ECH effect on the energetic particle driven modes stability in Heliotron J

AU - Varela, J.

AU - Nagasaki, K.

AU - Nagaoka, K.

AU - Yamamoto, S.

AU - Spong, D.

AU - Garcia, L.

AU - Cappa, A.

AU - Watanabe, K. Y.

PY - 2021

Y1 - 2021

N2 - The aim of the study is to analyze the stability of the Energetic Particle Modes (EPM) and Alfven Eigenmodes (AE) in Heliotron J if the electron cyclotron heating (ECH) is applied. The analysis is performed using the code FAR3d [1]. The simulations indicate that the modes with the largest growth rate in the Heliotron J high bumpiness (HB) and medium bumpiness (MB) magnetic configurations are n/m = 1/2 and 2/4 global AE (GAE). On the other hand, the simulations for the low bumpiness (LB) configurations show the destabilization of 1/2 EPM and 2/4 GAE. The simulations for LB configuration show a dominant stabilizing effect of the continuum damping with respect to the increase of the EP β as Te increases. On the other hand, the simulations for the HB and MB configurations indicate that the further destabilization of the AE/EPM caused by the increase of the EP β with Te is larger with respect to the stabilizing effect of the continuum damping.

AB - The aim of the study is to analyze the stability of the Energetic Particle Modes (EPM) and Alfven Eigenmodes (AE) in Heliotron J if the electron cyclotron heating (ECH) is applied. The analysis is performed using the code FAR3d [1]. The simulations indicate that the modes with the largest growth rate in the Heliotron J high bumpiness (HB) and medium bumpiness (MB) magnetic configurations are n/m = 1/2 and 2/4 global AE (GAE). On the other hand, the simulations for the low bumpiness (LB) configurations show the destabilization of 1/2 EPM and 2/4 GAE. The simulations for LB configuration show a dominant stabilizing effect of the continuum damping with respect to the increase of the EP β as Te increases. On the other hand, the simulations for the HB and MB configurations indicate that the further destabilization of the AE/EPM caused by the increase of the EP β with Te is larger with respect to the stabilizing effect of the continuum damping.

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M3 - Conference contribution

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T3 - 47th EPS Conference on Plasma Physics, EPS 2021

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BT - 47th EPS Conference on Plasma Physics, EPS 2021

PB - European Physical Society (EPS)

T2 - 47th EPS Conference on Plasma Physics, EPS 2021

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ER -

Theoretical analysis of the ECH effect on the energetic particle driven modes stability in Heliotron J

Abstract

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Funding

UN SDGs

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