Alpha-particle velocity-space diagnostic in ITER

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Standard

Alpha-particle velocity-space diagnostic in ITER. / Salewski, M.; Nocente, M.; Madsen, B.; Abramovic, Ivana; Fitzgerald, M.; Gorini, G.; Hansen, P. C.; Heidbrink, W. W.; Jacobsen, A. S.; Jensen, T.; Kiptily, V. G.; Klinkby, E. B.; Korsholm, S. B.; Kurki-Suonio, T.; Larsen, A. W.; Leipold, F.; Moseev, D.; Nielsen, S. K.; Pinches, S. D.; Rasmussen, J.; Rebai, M.; Schneider, M.; Shevelev, A.; Sipila, S.; Stejner, M.; Tardocchi, M.

julkaisussa: Nuclear Fusion, Vuosikerta 58, Nro 9, 096019, 09.2018.

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Harvard

Salewski, M, Nocente, M, Madsen, B, Abramovic, I, Fitzgerald, M, Gorini, G, Hansen, PC, Heidbrink, WW, Jacobsen, AS, Jensen, T, Kiptily, VG, Klinkby, EB, Korsholm, SB, Kurki-Suonio, T, Larsen, AW, Leipold, F, Moseev, D, Nielsen, SK, Pinches, SD, Rasmussen, J, Rebai, M, Schneider, M, Shevelev, A, Sipila, S, Stejner, M & Tardocchi, M 2018, 'Alpha-particle velocity-space diagnostic in ITER', Nuclear Fusion, Vuosikerta. 58, Nro 9, 096019. https://doi.org/10.1088/1741-4326/aace05

APA

Salewski, M., Nocente, M., Madsen, B., Abramovic, I., Fitzgerald, M., Gorini, G., ... Tardocchi, M. (2018). Alpha-particle velocity-space diagnostic in ITER. Nuclear Fusion, 58(9), [096019]. https://doi.org/10.1088/1741-4326/aace05

Vancouver

Salewski M, Nocente M, Madsen B, Abramovic I, Fitzgerald M, Gorini G et al. Alpha-particle velocity-space diagnostic in ITER. Nuclear Fusion. 2018 syys;58(9). 096019. https://doi.org/10.1088/1741-4326/aace05

Author

Salewski, M. ; Nocente, M. ; Madsen, B. ; Abramovic, Ivana ; Fitzgerald, M. ; Gorini, G. ; Hansen, P. C. ; Heidbrink, W. W. ; Jacobsen, A. S. ; Jensen, T. ; Kiptily, V. G. ; Klinkby, E. B. ; Korsholm, S. B. ; Kurki-Suonio, T. ; Larsen, A. W. ; Leipold, F. ; Moseev, D. ; Nielsen, S. K. ; Pinches, S. D. ; Rasmussen, J. ; Rebai, M. ; Schneider, M. ; Shevelev, A. ; Sipila, S. ; Stejner, M. ; Tardocchi, M. / Alpha-particle velocity-space diagnostic in ITER. Julkaisussa: Nuclear Fusion. 2018 ; Vuosikerta 58, Nro 9.

Bibtex - Lataa

@article{5d8228c852cd4afda8fb555dff7c48e2,
title = "Alpha-particle velocity-space diagnostic in ITER",
abstract = "We discuss alpha-particle velocity-space diagnostic in ITER based oil the planned collective Thomson scattering (CTS) and gamma-ray spectrometry (GRS) systems as well as ASCOT simulations of the alpha-particle distribution function. GRS is sensitive to alpha-particles with energies E greater than or similar to 1.7 MeV at all pitches p, and CTS for E greater than or similar to 0.3 MeV and |p| less than or similar to 0.9. The remaining velocity space is not observed. GRS and CTS view the plasma (almost) perpendicularly to the magnetic field. Hence we cannot determine the sign of the pitch of the alpha-particles and cannot distinguish co- and counter-going alpha-particles with the currently planned alpha-particle diagnostics. Therefore we can only infer the sign-insensitive 2D distribution function f{E,|p|) by velocity-space tomography for E greater than or similar to 1.7 MeV. This is a serious limitation, since co- and counter-going alpha-particle populations are expected to have different birth rates and neoclassical transport as well as different anomalous transport due to interaction with modes such as Alfven eigenmodes. We propose the installation of an oblique GRS system on ITER to allow us to diagnostically track such anisotropy effects and to infer the full, sign-sensitive f(E,p) for E greater than or similar to 1.7 MeV. alpha-particles with E less than or similar to 1.7 MeV are diagnosed by CTS only, which does not allow velocity-space tomography on its own. Nevertheless, we show that measurements of the alpha-particle energy spectrum, which is an ITER measurement requirement, are now feasible for E greater than or similar to 0.3 MeV using a velocity-space tomography formalism assuming isotropy in velocity space.",
keywords = "ITER, gamma-ray spectrometry, collective Thomson scattering, velocity-space tomography, alpha-particle diagnostic, GAMMA-RAY DIAGNOSTICS, ENERGETIC IONS, KINETIC-EQUATION, FUSION PLASMAS, CHAPTER 5, JET, PHYSICS, SPECTROSCOPY, SCINTILLATORS, HE-4",
author = "M. Salewski and M. Nocente and B. Madsen and Ivana Abramovic and M. Fitzgerald and G. Gorini and Hansen, {P. C.} and Heidbrink, {W. W.} and Jacobsen, {A. S.} and T. Jensen and Kiptily, {V. G.} and Klinkby, {E. B.} and Korsholm, {S. B.} and T. Kurki-Suonio and Larsen, {A. W.} and F. Leipold and D. Moseev and Nielsen, {S. K.} and Pinches, {S. D.} and J. Rasmussen and M. Rebai and M. Schneider and A. Shevelev and S. Sipila and M. Stejner and M. Tardocchi",
year = "2018",
month = "9",
doi = "10.1088/1741-4326/aace05",
language = "English",
volume = "58",
journal = "Nuclear Fusion",
issn = "0029-5515",
publisher = "IOP Publishing Ltd.",
number = "9",

}

RIS - Lataa

TY - JOUR

T1 - Alpha-particle velocity-space diagnostic in ITER

AU - Salewski, M.

AU - Nocente, M.

AU - Madsen, B.

AU - Abramovic, Ivana

AU - Fitzgerald, M.

AU - Gorini, G.

AU - Hansen, P. C.

AU - Heidbrink, W. W.

AU - Jacobsen, A. S.

AU - Jensen, T.

AU - Kiptily, V. G.

AU - Klinkby, E. B.

AU - Korsholm, S. B.

AU - Kurki-Suonio, T.

AU - Larsen, A. W.

AU - Leipold, F.

AU - Moseev, D.

AU - Nielsen, S. K.

AU - Pinches, S. D.

AU - Rasmussen, J.

AU - Rebai, M.

AU - Schneider, M.

AU - Shevelev, A.

AU - Sipila, S.

AU - Stejner, M.

AU - Tardocchi, M.

PY - 2018/9

Y1 - 2018/9

N2 - We discuss alpha-particle velocity-space diagnostic in ITER based oil the planned collective Thomson scattering (CTS) and gamma-ray spectrometry (GRS) systems as well as ASCOT simulations of the alpha-particle distribution function. GRS is sensitive to alpha-particles with energies E greater than or similar to 1.7 MeV at all pitches p, and CTS for E greater than or similar to 0.3 MeV and |p| less than or similar to 0.9. The remaining velocity space is not observed. GRS and CTS view the plasma (almost) perpendicularly to the magnetic field. Hence we cannot determine the sign of the pitch of the alpha-particles and cannot distinguish co- and counter-going alpha-particles with the currently planned alpha-particle diagnostics. Therefore we can only infer the sign-insensitive 2D distribution function f{E,|p|) by velocity-space tomography for E greater than or similar to 1.7 MeV. This is a serious limitation, since co- and counter-going alpha-particle populations are expected to have different birth rates and neoclassical transport as well as different anomalous transport due to interaction with modes such as Alfven eigenmodes. We propose the installation of an oblique GRS system on ITER to allow us to diagnostically track such anisotropy effects and to infer the full, sign-sensitive f(E,p) for E greater than or similar to 1.7 MeV. alpha-particles with E less than or similar to 1.7 MeV are diagnosed by CTS only, which does not allow velocity-space tomography on its own. Nevertheless, we show that measurements of the alpha-particle energy spectrum, which is an ITER measurement requirement, are now feasible for E greater than or similar to 0.3 MeV using a velocity-space tomography formalism assuming isotropy in velocity space.

AB - We discuss alpha-particle velocity-space diagnostic in ITER based oil the planned collective Thomson scattering (CTS) and gamma-ray spectrometry (GRS) systems as well as ASCOT simulations of the alpha-particle distribution function. GRS is sensitive to alpha-particles with energies E greater than or similar to 1.7 MeV at all pitches p, and CTS for E greater than or similar to 0.3 MeV and |p| less than or similar to 0.9. The remaining velocity space is not observed. GRS and CTS view the plasma (almost) perpendicularly to the magnetic field. Hence we cannot determine the sign of the pitch of the alpha-particles and cannot distinguish co- and counter-going alpha-particles with the currently planned alpha-particle diagnostics. Therefore we can only infer the sign-insensitive 2D distribution function f{E,|p|) by velocity-space tomography for E greater than or similar to 1.7 MeV. This is a serious limitation, since co- and counter-going alpha-particle populations are expected to have different birth rates and neoclassical transport as well as different anomalous transport due to interaction with modes such as Alfven eigenmodes. We propose the installation of an oblique GRS system on ITER to allow us to diagnostically track such anisotropy effects and to infer the full, sign-sensitive f(E,p) for E greater than or similar to 1.7 MeV. alpha-particles with E less than or similar to 1.7 MeV are diagnosed by CTS only, which does not allow velocity-space tomography on its own. Nevertheless, we show that measurements of the alpha-particle energy spectrum, which is an ITER measurement requirement, are now feasible for E greater than or similar to 0.3 MeV using a velocity-space tomography formalism assuming isotropy in velocity space.

KW - ITER

KW - gamma-ray spectrometry

KW - collective Thomson scattering

KW - velocity-space tomography

KW - alpha-particle diagnostic

KW - GAMMA-RAY DIAGNOSTICS

KW - ENERGETIC IONS

KW - KINETIC-EQUATION

KW - FUSION PLASMAS

KW - CHAPTER 5

KW - JET

KW - PHYSICS

KW - SPECTROSCOPY

KW - SCINTILLATORS

KW - HE-4

U2 - 10.1088/1741-4326/aace05

DO - 10.1088/1741-4326/aace05

M3 - Article

VL - 58

JO - Nuclear Fusion

JF - Nuclear Fusion

SN - 0029-5515

IS - 9

M1 - 096019

ER -

ID: 27113457