Measurement of toroidal Alfvén eigenmode-driven fast-ion flows using an imaging neutral particle analyzer at ASDEX Upgrade

J. Rueda-Rueda; M. Garcia-Munoz; E. Viezzer; P.A. Schneider; J. Galdon-Quiroga; J. Garcia-Dominguez; P. Oyola; L. Velarde; J. Hidalgo-Salaverri; X. Du; M.A. Van Zeeland; M. Videla-Trevin; J. Gonzalez-Martin; Ph. Lauber; T. Lunt; A. Herrmann; J. Ayllon-Guerola; the ASDEX Upgrade Team

doi:10.1088/1741-4326/ad43fe

Nuclear Fusion (Jan 2024)

Measurement of toroidal Alfvén eigenmode-driven fast-ion flows using an imaging neutral particle analyzer at ASDEX Upgrade

J. Rueda-Rueda,
M. Garcia-Munoz,
E. Viezzer,
P.A. Schneider,
J. Galdon-Quiroga,
J. Garcia-Dominguez,
P. Oyola,
L. Velarde,
J. Hidalgo-Salaverri,
X. Du,
M.A. Van Zeeland,
M. Videla-Trevin,
J. Gonzalez-Martin,
Ph. Lauber,
T. Lunt,
A. Herrmann,
J. Ayllon-Guerola,
the ASDEX Upgrade Team

Affiliations

J. Rueda-Rueda: ORCiD; Department of Atomic, Molecular and Nuclear Physics, University of Seville , Seville, Spain
M. Garcia-Munoz: ORCiD; Department of Atomic, Molecular and Nuclear Physics, University of Seville , Seville, Spain
E. Viezzer: ORCiD; Department of Atomic, Molecular and Nuclear Physics, University of Seville , Seville, Spain
P.A. Schneider: ORCiD; Max Planck Institute for Plasma Physics , Boltzmannstr. 2, 85748 Garching, Germany
J. Galdon-Quiroga: ORCiD; Department of Atomic, Molecular and Nuclear Physics, University of Seville , Seville, Spain
J. Garcia-Dominguez: ORCiD; Department of Atomic, Molecular and Nuclear Physics, University of Seville , Seville, Spain
P. Oyola: ORCiD; Department of Atomic, Molecular and Nuclear Physics, University of Seville , Seville, Spain
L. Velarde: ORCiD; Department of Mechanic and Manufacturing Engineering, University of Seville , Seville, Spain
J. Hidalgo-Salaverri: ORCiD; Department of Mechanic and Manufacturing Engineering, University of Seville , Seville, Spain
X. Du: ORCiD; General Atomics , PO Box 85608, San Diego, CA 92186-5608, United States of America
M.A. Van Zeeland: ORCiD; General Atomics , PO Box 85608, San Diego, CA 92186-5608, United States of America
M. Videla-Trevin: ORCiD; Department of Materials and Transport Science and Engineering, University of Seville , Seville, Spain
J. Gonzalez-Martin: ORCiD; Department of Mechanic and Manufacturing Engineering, University of Seville , Seville, Spain
Ph. Lauber: Max Planck Institute for Plasma Physics , Boltzmannstr. 2, 85748 Garching, Germany
T. Lunt: ORCiD; Max Planck Institute for Plasma Physics , Boltzmannstr. 2, 85748 Garching, Germany
A. Herrmann: Max Planck Institute for Plasma Physics , Boltzmannstr. 2, 85748 Garching, Germany
J. Ayllon-Guerola: ORCiD; Department of Mechanic and Manufacturing Engineering, University of Seville , Seville, Spain
the ASDEX Upgrade Team

DOI: https://doi.org/10.1088/1741-4326/ad43fe
Journal volume & issue: Vol. 64, no. 6
p. 066032

Abstract

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Alfvén Eigenmodes-driven fast-ion flows have been measured for the first time at the ASDEX Upgrade tokamak using an imaging neutral particle analyzer. The flow is such that particles are expelled from the mode location, losing energy as they move outwards. This flow aligns well with the projection of the lines of constant magnetic moment and constant E ′ ( $E^{^{\prime}} = E - \omega P_\phi/n$ , with E being the particle energy, $\omega, n$ the mode frequency and toroidal number and P _φ the toroidal canonical angular momentum). The observed redistributions are consistent with full-orbit simulations performed with the ASCOT5 code, using the mode structure predicted by the linear gyro-kinetic code LIGKA.

Published in Nuclear Fusion

ISSN: 0029-5515 (Print); 1741-4326 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Science: Physics: Nuclear and particle physics. Atomic energy. Radioactivity
Website: https://iopscience.iop.org/journal/0029-5515

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