Fast-ion phase-space tomography with wave-particle interactions in the ion cyclotron frequency range as prior
Artikel i vetenskaplig tidskrift, 2025

The fast-ion distribution function in fusion plasmas can be inferred by inverting Doppler-shifted measurements from fast-ion diagnostics. The full fast-ion distribution function can be parametrised by three constants of motion with the addition of a binary index. However, with a limited number of measurements, cogent prior information must be added to regularise the inverse problem, enabling the reconstruction of the distribution function. In this paper, we demonstrate how to incorporate wave-particle interactions in the ion cyclotron range of frequencies (ICRFs) as prior information with the future ITER tokamak as a test case. We find that the addition of ICRF physics as prior information improves the reconstruction of a test ICRF-heated fast-ion distribution function in ITER using synthetic data based on the planned collective Thomson scattering sightlines and the planned gamma-ray spectroscopy sightlines. The addition of such prior information is beneficial in the case of a limited phase-space coverage of fast-ion diagnostics.

fast ions

tomography

prior information

wave-particle interactions

Författare

M. Rud

Danmarks Tekniske Universitet (DTU)

Hans Eriksson

Chalmers, Industri- och materialvetenskap, Produktionssystem

J. Eriksson

Uppsala universitet

P. C. Hansen

Danmarks Tekniske Universitet (DTU)

O. Hyvarinen

Helsingin Yliopisto

H. Jarleblad

Danmarks Tekniske Universitet (DTU)

Ye. O. Kazakov

Koninklijke Militaire Universiteit

S. B. Korsholm

Danmarks Tekniske Universitet (DTU)

M. Nocente

Universita' degli Studi di Milano-Bicocca

J. Rasmussen

Danmarks Tekniske Universitet (DTU)

B. C. G. Reman

Koninklijke Militaire Universiteit

A. Snicker

Teknologian Tutkimuskeskus (VTT)

A. Valentini

Danmarks Tekniske Universitet (DTU)

Y. Dong

Danmarks Tekniske Universitet (DTU)

D. Moseev

Max-Planck-Gesellschaft

M. Salewski

Danmarks Tekniske Universitet (DTU)

Nuclear Fusion

0029-5515 (ISSN) 1741-4326 (eISSN)

Vol. 65 5 056008

Ämneskategorier (SSIF 2025)

Fusion, plasma och rymdfysik

DOI

10.1088/1741-4326/adc400

Mer information

Senast uppdaterat

2025-04-11