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

Mirko Salewski; M. Nocente; Asger Schou Jacobsen; F. Binda; C. Cazzaniga; G. Ericsson; J. Eriksson; G. Gorini; C. Hellesen; A. Hjalmarsson; V.G. Kiptily; T. Koskela; Søren Bang Korsholm; T. Kurki-Suonio; Frank Leipold; Jens Madsen; Dmitry Moseev; Stefan Kragh Nielsen; Jesper Rasmussen; M. Schneider; S.E. Sharapov; Morten Stejner Pedersen; M. Tardocchi

doi:10.1088/1741-4326/aa60e9

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

Mirko Salewski, M. Nocente, Asger Schou Jacobsen, F. Binda, C. Cazzaniga, G. Ericsson, J. Eriksson, G. Gorini, C. Hellesen, A. Hjalmarsson, V.G. Kiptily, T. Koskela, Søren Bang Korsholm, T. Kurki-Suonio, Frank Leipold, Jens Madsen, Dmitry Moseev, Stefan Kragh Nielsen, Jesper Rasmussen, M. SchneiderS.E. Sharapov, Morten Stejner Pedersen, M. Tardocchi

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Abstract

We demonstrate the measurement of a 2D MeV-range ion velocity distribution function by velocity-space tomography at JET. Deuterium ions were accelerated into the MeV-range by third harmonic ion cyclotron resonance heating. We made measurements with three neutron emission spectrometers and a high-resolution γ-ray spectrometer detecting the γ-rays released in two reactions. The tomographic inversion based on these five spectra is in excellent agreement with numerical simulations with the ASCOT–RFOF and the SPOT–RFOF codes. The length of the measured fast-ion tail corroborates the prediction that very few particles are accelerated above 2 MeV due to the weak wave-particle interaction at higher energies.

Original language	English
Article number	056001
Journal	Nuclear Fusion
Volume	57
Issue number	5
Number of pages	10
ISSN	0029-5515
DOIs	https://doi.org/10.1088/1741-4326/aa60e9
Publication status	Published - 2017

Keywords

γ-ray spectrometry
Neutron emission spectrometry
Velocity-space tomography
Fast ions
Tokamak

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Salewski, M., Nocente, M., Jacobsen, A. S., Binda, F., Cazzaniga, C., Ericsson, G., Eriksson, J., Gorini, G., Hellesen, C., Hjalmarsson, A., Kiptily, V. G., Koskela, T., Korsholm, S. B., Kurki-Suonio, T., Leipold, F., Madsen, J., Moseev, D., Nielsen, S. K., Rasmussen, J., ... Tardocchi, M. (2017). MeV-range velocity-space tomography from gamma-ray and neutron emission spectrometry measurements at JET. Nuclear Fusion, 57(5), Article 056001 . https://doi.org/10.1088/1741-4326/aa60e9

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

abstract = " We demonstrate the measurement of a 2D MeV-range ion velocity distribution function by velocity-space tomography at JET. Deuterium ions were accelerated into the MeV-range by third harmonic ion cyclotron resonance heating. We made measurements with three neutron emission spectrometers and a high-resolution γ-ray spectrometer detecting the γ-rays released in two reactions. The tomographic inversion based on these five spectra is in excellent agreement with numerical simulations with the ASCOT–RFOF and the SPOT–RFOF codes. The length of the measured fast-ion tail corroborates the prediction that very few particles are accelerated above 2 MeV due to the weak wave-particle interaction at higher energies. ",

keywords = "γ-ray spectrometry, Neutron emission spectrometry, Velocity-space tomography, Fast ions, Tokamak",

author = "Mirko Salewski and M. Nocente and Jacobsen, {Asger Schou} and F. Binda and C. Cazzaniga and G. Ericsson and J. Eriksson and G. Gorini and C. Hellesen and A. Hjalmarsson and V.G. Kiptily and T. Koskela and Korsholm, {S{\o}ren Bang} and T. Kurki-Suonio and Frank Leipold and Jens Madsen and Dmitry Moseev and Nielsen, {Stefan Kragh} and Jesper Rasmussen and M. Schneider and S.E. Sharapov and Pedersen, {Morten Stejner} and M. Tardocchi",

year = "2017",

doi = "10.1088/1741-4326/aa60e9",

language = "English",

volume = "57",

journal = "Nuclear Fusion",

issn = "0029-5515",

publisher = "IOP Publishing",

number = "5",

}

Salewski, M, Nocente, M, Jacobsen, AS, Binda, F, Cazzaniga, C, Ericsson, G, Eriksson, J, Gorini, G, Hellesen, C, Hjalmarsson, A, Kiptily, VG, Koskela, T, Korsholm, SB, Kurki-Suonio, T, Leipold, F, Madsen, J, Moseev, D, Nielsen, SK , Rasmussen, J, Schneider, M, Sharapov, SE, Pedersen, MS & Tardocchi, M 2017, 'MeV-range velocity-space tomography from gamma-ray and neutron emission spectrometry measurements at JET', Nuclear Fusion, vol. 57, no. 5, 056001 . https://doi.org/10.1088/1741-4326/aa60e9

TY - JOUR

T1 - MeV-range velocity-space tomography from gamma-ray and neutron emission spectrometry measurements at JET

AU - Salewski, Mirko

AU - Nocente, M.

AU - Jacobsen, Asger Schou

AU - Binda, F.

AU - Cazzaniga, C.

AU - Ericsson, G.

AU - Eriksson, J.

AU - Gorini, G.

AU - Hellesen, C.

AU - Hjalmarsson, A.

AU - Kiptily, V.G.

AU - Koskela, T.

AU - Korsholm, Søren Bang

AU - Kurki-Suonio, T.

AU - Leipold, Frank

AU - Madsen, Jens

AU - Moseev, Dmitry

AU - Nielsen, Stefan Kragh

AU - Rasmussen, Jesper

AU - Schneider, M.

AU - Sharapov, S.E.

AU - Pedersen, Morten Stejner

AU - Tardocchi, M.

PY - 2017

Y1 - 2017

N2 - We demonstrate the measurement of a 2D MeV-range ion velocity distribution function by velocity-space tomography at JET. Deuterium ions were accelerated into the MeV-range by third harmonic ion cyclotron resonance heating. We made measurements with three neutron emission spectrometers and a high-resolution γ-ray spectrometer detecting the γ-rays released in two reactions. The tomographic inversion based on these five spectra is in excellent agreement with numerical simulations with the ASCOT–RFOF and the SPOT–RFOF codes. The length of the measured fast-ion tail corroborates the prediction that very few particles are accelerated above 2 MeV due to the weak wave-particle interaction at higher energies.

AB - We demonstrate the measurement of a 2D MeV-range ion velocity distribution function by velocity-space tomography at JET. Deuterium ions were accelerated into the MeV-range by third harmonic ion cyclotron resonance heating. We made measurements with three neutron emission spectrometers and a high-resolution γ-ray spectrometer detecting the γ-rays released in two reactions. The tomographic inversion based on these five spectra is in excellent agreement with numerical simulations with the ASCOT–RFOF and the SPOT–RFOF codes. The length of the measured fast-ion tail corroborates the prediction that very few particles are accelerated above 2 MeV due to the weak wave-particle interaction at higher energies.

KW - γ-ray spectrometry

KW - Neutron emission spectrometry

KW - Velocity-space tomography

KW - Fast ions

KW - Tokamak

U2 - 10.1088/1741-4326/aa60e9

DO - 10.1088/1741-4326/aa60e9

M3 - Journal article

SN - 0029-5515

VL - 57

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 5

M1 - 056001

ER -

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

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