Energetic Particle Physics

Prof. Salewski works on developing fusion energy into a future energy source. He works with measurements of energetic particles in fusion plasmas by tomography, in particular in velocity-space and phase-space, which is the combined position- and velocity space. (see dr.techn. thesis). A measured 2D fast-ion velocity distribution function at the tokamak JET looks like this:


The coordinate axes are the velocities parallel and perpendicular to the local magnetic field. New developments include neural network and physics-informed prior information such as orbit tomography and slowing-down physics regularization tomography. The measurements are made on the tokamaks JET, ASDEX Upgrade, DIII-D, EAST, MAST and TCV and the stellarators Wendelstein 7-X and LHD by fast-ion D-alpha spectroscopy, collective Thomson scattering, neutron emission spectrometry, gamma-ray spectroscopy, neutral particle analyzers, fast-ion loss detectors, ion cyclotron emission diagnostics, and MeV protons. Eventually the velocity-space tomography method is developed to study energetic alpha particles from fusion reactions in the next-step fusion device ITER. Prof. Salewski is an ITER Scientist Fellow and serves as Chair for the ITPA Topical Group on Energetic Particle Physics that organizes a wordwide research programme to support the ITER tokamak. Prof. Salewski enjoys teaching BSc-, MSc- and PhD-level courses and teaches at the moment Electromagnetism for Physicists, Plasma Physics, and the Physics of Sports. Weblinks: ResearcherID, my GoogleScholar.

Publications on energetic particle physics and velocity-space tomography



Dr. techn. thesis (DTU)

M Salewski (2020)

Fast-ion diagnostic in fusion plasmas by velocity-space tomography



Journal publications on energetic particle physics (selective)


81. M Rud et al. (2024) Nucl. Fusion 64 036007

Diagnostic weight functions in constants-of-motion phase-space


80. H Jarleblad et al. (2024) Nucl. Fusion 64 026015

Fast-ion orbit origin of neutron emission spectroscopy measurements in the JET DT campaign


79. H Jarleblad et al. (2024) Comp. Phys. Comm. 294, 108930

A framework of synthetic diagnostics using energetic-particle orbits in tokamaks


78. L Liu et al (2024) Plasma Phys. Control. Fusion 66 015007

Interpretation of ion cyclotron emission from sub-Alfvenic beam-injected ions heated plasmas soon after L-H mode transition in EAST


77. R. Ochoukov et al 2023 Nucl. Fusion 63 046001

Analysis of high-frequency Alfven eigenmodes observed in ASDEX Upgrade in the presence of RF-accelerated NBI ions


76. A Dal Molin et al 2024 Meas. Sci. Technol. 34 085501

A new hard x-ray spectrometer of runaway electron measurements in tokamaks


75. S. Benjamin et al (2023) Comp. Phys. Comm. 292, 108893

Distribution transforms for guiding-center coordinates in axisymmetric tokamak plasmas


74. S.E. Sharapov et al 2023 Nucl. Fusion 63 112007

Experiments on excitation of Alfven eigenmodes by alpha-particles with bump-on-tail distributions in JET DTE2 plasmas


73. M. Maslov et al (2023) Nucl. Fusion 63 112002

JET D-T scenario with optimized non-thermal fusion


72. BS Schmidt et al. (2023) Phys. Plasmas 30, 092109

Velocity-space sensitivity and inversion of synthetic ion cyclotron emission


71. BS Schmidt et al (2023) Nucl. Fusion 63 076016

4D and 5D phase-space tomography using slowing-down physics regularization


70. M Nocente et al. (2022) Rev. Sci. Instrum. 93 093520

Fusion product measurements by nuclear diagnostics in the Joint European Torus deuterium-tritium 2 campaign (invited)


69. JE Mencke et al. (2022) Rev. Sci. Instrum. 93 123503

Characterization of correlations of fast-ion H-alpha measurement volumes in Wendelstein 7-X by particle tracking


67. H Jarleblad et al. (2022) Nucl. Fusion 62 112005

Fast-ion orbit sensitivity of neutron and gamma-ray diagnostics for one-step fusion reactions


66. F Nabais et al. (2022) Nucl. Fusion 62 104001

Bump-on-tail distributions caused by Alfvenic redistribution of energetic ions


65. BCG Reman et al. (2022) Plasma Phys. Control. Fusion 64 085008

First observation and interpretation of spontaneous collective radiation from fusion-born ions in a stellarator plasma


64. VG Kiptily et al. (2022) Plasma Phys. Control. Fusion 64 064001

Excitation of Alfven eigenmodes by fusion-born alpha-particles in D-He-3 plasmas on JET


63. SB Korsholm et al. (2022) Rev. Sci. Instum. 93 103539

ITER collective Thomson scattering - Preparing to diagnose fusion-born alpha particles (invited)


62. L Stagner et al. (2022) Nuclear Fusion 62 026033

Orbit tomography of energetic particle distribution functions


61. A Bierwage et al. (2022) Computer Physics Communications 275 108305

Representation and modeling of charged particle distributions intokamaks


60. M Dreval et al. (2022) Nucl. Fusion 62 056001

Alfven cascade eigenmodes above the TAE-frequency and localizationof Alfven modes in D-3He plasmas on JET


59. E Panontin et al. (2021) J. Instrum. 16 C12005

Comparison of unfolding methods for the inference of runaway electron energy distribution from gamma-ray spectroscopic measurements


58. J Su et al. (2021) Plasma Sci. Technol. 23(9) 095103

Reconstructions of velocity distributions from fast-ion D-alpha (FIDA) measurements on EAST


57. M Nocente et al. (2021) Rev. Sci. Instrum. 92 043537

A new tangential gamma-ray spectrometer for fast ion measurements in deuterium and deuterium-tritium plasmas of the Joint European Torus


56. BS Schmidt et al. (2021) Rev. Sci. Instrum. 92 053528

Determining 1D fast-ion velocity distribution functions from ion cyclotron emission data using deep neural networks


55. D Moseev et al. (2021) Rev. Sci. Instrum. 92 033546

Development of the ion cyclotron emission diagnostic for the W7-X stellarator


54. H Jarleblad et al. (2021) Rev..Sci. Instrum. 92 043526

Fast-ion orbit sensitivity of neutron emission spectroscopy diagnostics


53. E Panontin et al. (2021) Rev. Sci. Instrum. 92 053529

First spatially resolved measurements of the D?3He alpha-particle source with the upgraded JET gamma-ray camera


52. WW Heidbrink et al (2021) Plasma Phys. Control. Fusion 63

Phase-space sensitivity (weight functions) of 3 MeV proton diagnostic


51. Ye O Kazakov et al 2021 Phys. Plasmas 28 020501

Physics and applications of three-ion ICRF scenarios for fusion research


50. Lunan Liu et al 2021 Nucl. Fusion 61 026004

Explanation of core ion cyclotron emission from beam-ion heated plasmas in ASDEX Upgrade by the magnetoacoustic cyclotron instability


49. B Madsen et al 2020 Plasma Phys. Control. Fusion 62 115019

Fast-ion velocity-space tomography using slowing-down regularization in EAST plasmas with co- and counter-current neutral beam injection


48. M. Nocente et al 2020 Nucl. Fusion 60 124006

Generation and observation of fast deuterium ions and fusion-born alpha particles in JET $\mathrm{D-^3He}$ plasmas with the 3-ion radio-frequency heating scenario


47. R. Ochoukov et al 2020 Nucl. Fusion 60 126043

High frequency Alfvén eigenmodes detected with ion-cyclotron-emission diagnostics during NBI and ICRF heated plasmas on the ASDEX Upgrade tokamak


46. J. Huang et al 2020 Nucl. Fusion 60 016002

Improved high-performance fully non-inductive discharge by optimizing the fast-ion confinement on EAST


45. Ye.O. Kazakov et al 2020 Nucl. Fusion 60 112013

Plasma heating and generation of energetic D ions with the 3-ion ICRF + NBI scenario in mixed H-D plasmas at JET-ILW


44. B. Madsen et al 2020 Nucl. Fusion 60 066024

Tomography of the positive-pitc fast-ion velocity distribution in DIII-D plasmas with Alfvén eigenmodes and neoclassical tearing modes

43. M Nocente et al. 2020 Plasma Phys. Control. Fusion 62 014015

MeV range particle physics studies in tokamak plasmas using gamma-ray spectroscopy


42. R. Ochoukov et al 2019 Nucl. Fusion 59 086032

Interpretation of core ion cyclotron emission driven by sub-Alfvénic beam-injected ions via magnetoacoustic cyclotron instability


41. J.R. Harrison et al 2019 Nucl. Fusion 59 112011

Overview of new MAST physics in anticipation of first results from MAST Upgrade

(Velocity-space tomography figure selected as highlight of results from MAST overview from the IAEA Fusion Energy Conference)


40. H Meyer et al. (2019) Nucl. Fusion 59 112014

Overview of physics studies on ASDEX Upgrade

(Velocity-space tomography figure selected as highlight of results from ASDEX Upgrade overview from the IAEA Fusion Energy Conference)


39. J Eriksson et al (2019) Plasma Phys. Control. Fusion 61 014027

Measuring fast ions in fusion plasmas with neutron diagnostics at JET


38. M Salewski et al. (2019) Journal of Instrumentation 14 C05019

Diagnostic of fast-ion energy spectra and densities in magnetized plasmas


37. D Moseev & M Salewski (2019).  Physics of Plasmas 26  020901

Bi-Maxwellian, slowing-down, and ring velocity distributions of fast ions in magnetized plasmas


36. J Galdon-Quiroga et al (2019) Nucl. Fusion 59 066016

Observation of accelerated beam ion population during edge localized modes in the ASDEX Upgrade tokamak


35.M Salewski et al. (2018) Nuclear Fusion 58 096019

Alpha-particle velocity-space diagnostic in ITER


34. M Salewski et al. (2018) Fusion Science and Technology 74(1-2) 23-36

Bayesian Integrated Data Analysis of Fast-Ion Measurements by Velocity-Space Tomography


33. M Salewski et al. (2018) Nuclear Fusion 58 036017

Deuterium temperature, drift velocity, and density measurements in non-Maxwellian plasmas at ASDEX Upgrade

32. D Moseev, M Salewski, M Garcia-Muñoz,B Geiger, M Nocente (2018) Rev. Mod. Plasma Phys. 2, 7

Recent progress in fast-ion diagnostics for magnetically confined plasmas


31. B Madsen et al. (2018) Review of Scientific Instruments 89 10D125

Velocity-space tomography using prior information at MAST


30. J Galdon-Quiroga et al. (2018)  Plasma Physics and Controlled Fusion 60 105005

Velocity-space sensitivity and tomography of scintillator-based fast-ion loss detectors


29. M Nocente et al. (2018) Review of Scientific Instruments 89 10I124

High resolution gamma-ray spectrometer with MHz capabilities for runaway electron studies at ASDEX Upgrade


28. J Galdon-Quiroga et al. (2018) Physical Review Letters 121 025002

Beam-Ion Acceleration during Edge Localized Modes in the ASDEX Upgrade Tokamak


27. M Nocente et al (2017) Nucl. Fusion 57 076016

Conceptual design of the radial gamma ray spectrometers system for α particle and runaway electron measurements at ITER


26. M Weiland et al. (2017) Nuclear Fusion 57 116058

Phase-space resolved measurement of 2nd harmonic ion cyclotron heating using FIDA tomography at the ASDEX Upgrade tokamak

25. B Geiger et al. (2017) Plasma Physics and Controlled Fusion 59 115002

Fast-ion transport in low density L-mode plasmas at TCV using FIDA spectroscopy and the TRANSP code

24. AS Jacobsen et al. (2017) Review of Scientific Instruments 88 073506.

Velocity-space sensitivities of neutron emission spectrometers at the tokamaks JET and ASDEX Upgrade in deuterium plasmas

23. M Salewski et al. (2017) Nuclear Fusion 57 056001

MeV-range velocity-space tomography from gamma-ray and neutron emission spectrometry measurements at JET


22. M Schneider et al. (2016) Nuclear Fusion 56 112022

Modelling third harmonic ion cyclotron acceleration of deuterium beams for JET fusion product studies experiments

21. J Rasmussen et al. (2016) Nuclear Fusion 56 112014

Collective Thomson scattering measurements of fast-ion transport due to sawtooth crashes in ASDEX Upgrade

20. F Jaulmes et al. (2016) Nuclear Fusion 56 112012.

Numerical and experimental study of the redistribution of energetic and impurity ions by sawteeth in ASDEX Upgrade

19. M Salewski et al. (2016) Nuclear Fusion 56 106024 

High-definition velocity-space tomography of fast-ion dynamics


18. AS Jacobsen et al. (2016) Plasma Physics and Controlled Fusion 58045016

Inversion methods for fast-ion velocity-space tomography in fusion plasmas


17. AS Jacobsen et al. (2016) Plasma Physics and Controlled Fusion 58042002

Benchmark and combined velocity-space tomography of fast-ion D-Alpha spectroscopy and collective Thomson scattering measurements


16. M Weiland et al. (2016) Plasma Physics and Controlled Fusion 58025012

Enhancement of the FIDA diagnostic at ASDEX Upgrade for velocity-space tomography


15. M Salewski et al. (2016) Nuclear Fusion 56 046009

Fast-ion energy resolution by one-step reaction gamma-ray spectrometry


14. M Salewski et al. (2015) Nuclear Fusion 55 093029

Velocity-space observation regions of high-resolution two-step reaction gamma-ray spectroscopy


13. AS Jacobsen et al. (2015) Nuclear Fusion 55 053013

Velocity-space sensitivity of neutron spectrometry measurements 


12. J Eriksson et al. (2015) Nuclear Fusion 55 123026

Dual sightline Measurements of MeV range deuterons with neutron and gamma-ray spectroscopy at JET


11. B Geiger et al. (2015) Nuclear Fusion 55 083001

Fast-ion transport and neutral beam current drive at ASDEX Upgrade


10. M Salewski et al.  (2015) Plasma Physics and Controlled Fusion 57014021

Doppler tomography in fusion plasmas and astrophysics


9. AS Jacobsen et al. (2014) Review of Scientific Instruments 85 11E103

Velocity-space sensitivity of the time-of-flight neutron spectrometer at JET


8. M Salewskiet al.(2014) Plasma Physics and Controlled Fusion 56 105005

On velocity-space sensitivity of fast-ion D-alpha spectroscopy


7. M Salewskiet al.(2014) Nuclear Fusion 54 023005

Measurement of a 2D fast-ion velocity distribution function by tomographic inversion of fast-ion D-alpha spectra


6. M Salewski et al. (2013) Nuclear Fusion 53 063019

Combination of fast-ion diagnostics in velocity-space tomographies


5. M Salewski et al. (2012) Nuclear Fusion 52 103008

Tomography of fast-ion velocity-space distributions from synthetic CTS and FIDA measurements


4. M Salewskiet al. (2011) Nuclear Fusion 51 083014

On velocity space interrogation regions of fast-ion collective Thomson scattering at ITER

3. M. Salewski et al (2010) Nucl. Fusion 50 035012

Comparison of fast ion collective Thomson scattering measurements at ASDEX Upgrade with numerical simulations


2. M Salewski et al (2009) Plasma Phys. Control. Fusion 51 035006

Plasma Physics and Controlled Fusion Comparison of collective Thomson scattering signals due to fast ions in ITER scenarios with fusion and auxiliary heating


1. M. Salewski et al (2009) Nucl. Fusion 49 025006

Impact of ICRH on the measurement of fusion alphas by collective Thomson scattering in ITER


26 FEBRUARY 2024