Detection of alpha heating in JET-ILW DT plasmas by a study of the electron temperature response to ICRH modulation

P. Mantica; F. Auriemma; I. Casiraghi; D. Gallart; K. Kirov; E. Lerche; Antti Salmi; A. Dal Molin; E. Delabie; J. Eriksson; JET Contributors

doi:10.1088/1741-4326/ad52aa

Detection of alpha heating in JET-ILW DT plasmas by a study of the electron temperature response to ICRH modulation

P. Mantica^*, F. Auriemma, I. Casiraghi, D. Gallart, K. Kirov, E. Lerche, Antti Salmi, A. Dal Molin, E. Delabie, J. Eriksson, JET Contributors

^*Corresponding author for this work

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

4 Citations (Scopus)

Abstract

In the JET DTE2 campaign a new method was successfully tested to detect the heating of bulk electrons by α-particles, using the dynamic response of the electron temperature T_e to the modulation of ion cyclotron resonance heating (ICRH). A fundamental deuterium (D) ICRH scheme was applied to a tritium-rich hybrid plasma with D-neutral beam injection (NBI). The modulation of the ion temperature T_i and of the ICRH accelerated deuterons leads to modulated α-heating with a large delay with respect to other modulated electron heating terms. A significant phase delay of ∼40° is measured between central T_e and T_i, which can only be explained by α-particle heating. Integrated modelling using different models for ICRH absorption and ICRH/NBI interaction reproduces the effect qualitatively. Best agreement with experiment is obtained with the European Transport Solver/Heating and Current Drive workflow.

Original language	English
Article number	086001
Journal	Nuclear Fusion
Volume	64
Issue number	8
DOIs	https://doi.org/10.1088/1741-4326/ad52aa
Publication status	Published - Aug 2024
MoE publication type	A1 Journal article-refereed

Funding

This work was carried out within the framework of the EUROfusion Consortium, funded by the European Union via the Euratom Research and Training Programme (Grant Agreement No. 101052200\u2014EUROfusion).

Keywords

alpha heating
DT plasmas
ICRH modulation
tokamak

UN SDGs

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

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10.1088/1741-4326/ad52aaLicence: CC BY

Cite this

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title = "Detection of alpha heating in JET-ILW DT plasmas by a study of the electron temperature response to ICRH modulation",

abstract = "In the JET DTE2 campaign a new method was successfully tested to detect the heating of bulk electrons by α-particles, using the dynamic response of the electron temperature Te to the modulation of ion cyclotron resonance heating (ICRH). A fundamental deuterium (D) ICRH scheme was applied to a tritium-rich hybrid plasma with D-neutral beam injection (NBI). The modulation of the ion temperature Ti and of the ICRH accelerated deuterons leads to modulated α-heating with a large delay with respect to other modulated electron heating terms. A significant phase delay of ∼40° is measured between central Te and Ti, which can only be explained by α-particle heating. Integrated modelling using different models for ICRH absorption and ICRH/NBI interaction reproduces the effect qualitatively. Best agreement with experiment is obtained with the European Transport Solver/Heating and Current Drive workflow.",

keywords = "alpha heating, DT plasmas, ICRH modulation, tokamak",

author = "P. Mantica and F. Auriemma and I. Casiraghi and D. Gallart and K. Kirov and E. Lerche and Antti Salmi and {Dal Molin}, A. and E. Delabie and J. Eriksson and J. Garcia and P. Huynh and P. Jacquet and T. Jonsson and V. Kiptily and E. Litherland-Smith and Maggi, {C. F.} and M. Mantsinen and G. Marcer and M. Maslov and S. Menmuir and M. Nocente and E. Peluso and G. Pucella and D. Rigamonti and Z. Stancar and H. Sun and G. Szepesi and M. Tardocchi and {Van Eester}, D. and {JET Contributors}",

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doi = "10.1088/1741-4326/ad52aa",

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AU - Mantica, P.

AU - Auriemma, F.

AU - Casiraghi, I.

AU - Gallart, D.

AU - Kirov, K.

AU - Lerche, E.

AU - Salmi, Antti

AU - Dal Molin, A.

AU - Delabie, E.

AU - Eriksson, J.

AU - Garcia, J.

AU - Huynh, P.

AU - Jacquet, P.

AU - Jonsson, T.

AU - Kiptily, V.

AU - Litherland-Smith, E.

AU - Maggi, C. F.

AU - Mantsinen, M.

AU - Marcer, G.

AU - Maslov, M.

AU - Menmuir, S.

AU - Nocente, M.

AU - Peluso, E.

AU - Pucella, G.

AU - Rigamonti, D.

AU - Stancar, Z.

AU - Sun, H.

AU - Szepesi, G.

AU - Tardocchi, M.

AU - Van Eester, D.

AU - JET Contributors

PY - 2024/8

Y1 - 2024/8

N2 - In the JET DTE2 campaign a new method was successfully tested to detect the heating of bulk electrons by α-particles, using the dynamic response of the electron temperature Te to the modulation of ion cyclotron resonance heating (ICRH). A fundamental deuterium (D) ICRH scheme was applied to a tritium-rich hybrid plasma with D-neutral beam injection (NBI). The modulation of the ion temperature Ti and of the ICRH accelerated deuterons leads to modulated α-heating with a large delay with respect to other modulated electron heating terms. A significant phase delay of ∼40° is measured between central Te and Ti, which can only be explained by α-particle heating. Integrated modelling using different models for ICRH absorption and ICRH/NBI interaction reproduces the effect qualitatively. Best agreement with experiment is obtained with the European Transport Solver/Heating and Current Drive workflow.

AB - In the JET DTE2 campaign a new method was successfully tested to detect the heating of bulk electrons by α-particles, using the dynamic response of the electron temperature Te to the modulation of ion cyclotron resonance heating (ICRH). A fundamental deuterium (D) ICRH scheme was applied to a tritium-rich hybrid plasma with D-neutral beam injection (NBI). The modulation of the ion temperature Ti and of the ICRH accelerated deuterons leads to modulated α-heating with a large delay with respect to other modulated electron heating terms. A significant phase delay of ∼40° is measured between central Te and Ti, which can only be explained by α-particle heating. Integrated modelling using different models for ICRH absorption and ICRH/NBI interaction reproduces the effect qualitatively. Best agreement with experiment is obtained with the European Transport Solver/Heating and Current Drive workflow.

KW - alpha heating

KW - DT plasmas

KW - ICRH modulation

KW - tokamak

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U2 - 10.1088/1741-4326/ad52aa

DO - 10.1088/1741-4326/ad52aa

M3 - Article

AN - SCOPUS:85197339061

SN - 0029-5515

VL - 64

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 8

M1 - 086001

ER -

Detection of alpha heating in JET-ILW DT plasmas by a study of the electron temperature response to ICRH modulation

Abstract

Funding

Keywords

UN SDGs

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