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

Asger Schou Jacobsen, Mirko Salewski, B. Geiger, Søren Bang Korsholm, Frank Leipold, Stefan Kragh Nielsen, Jesper Rasmussen, Morten Stejner Pedersen, M. Weiland

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We demonstrate the combination of fast-ion D-alpha spectroscopy (FIDA) and collective Thomson scattering (CTS) measurements to determine a common best estimate of the fastion velocity distribution function by velocity-space tomography. We further demonstrate a benchmark of FIDA tomography and CTS measurements without using a numerical simulation as common reference. Combined velocity-space tomographies from FIDA and CTS measurements confirm that sawtooth crashes reduce the fast-ion phase-space densities in the plasma center and affect ions with pitches close to one more strongly than those with pitches close to zero.
Original languageEnglish
Article number042002
JournalPlasma Physics and Controlled Fusion
Volume58
Issue number4
Number of pages5
ISSN0741-3335
DOIs
Publication statusPublished - 2016

Keywords

  • Velocity-space tomography
  • Collective Thomson scattering
  • Fast-ion D-alpha spectroscopy
  • Sawtooth crash
  • Tokamak

Cite this

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title = "Benchmark and combined velocity-space tomography of fast-ion D-alpha spectroscopy and collective Thomson scattering measurements",
abstract = "We demonstrate the combination of fast-ion D-alpha spectroscopy (FIDA) and collective Thomson scattering (CTS) measurements to determine a common best estimate of the fastion velocity distribution function by velocity-space tomography. We further demonstrate a benchmark of FIDA tomography and CTS measurements without using a numerical simulation as common reference. Combined velocity-space tomographies from FIDA and CTS measurements confirm that sawtooth crashes reduce the fast-ion phase-space densities in the plasma center and affect ions with pitches close to one more strongly than those with pitches close to zero.",
keywords = "Velocity-space tomography, Collective Thomson scattering, Fast-ion D-alpha spectroscopy, Sawtooth crash, Tokamak",
author = "Jacobsen, {Asger Schou} and Mirko Salewski and B. Geiger and Korsholm, {S{\o}ren Bang} and Frank Leipold and Nielsen, {Stefan Kragh} and Jesper Rasmussen and Pedersen, {Morten Stejner} and M. Weiland",
year = "2016",
doi = "10.1088/0741-3335/58/4/042002",
language = "English",
volume = "58",
journal = "Plasma Physics and Controlled Fusion",
issn = "0741-3335",
publisher = "IOP Publishing",
number = "4",

}

Benchmark and combined velocity-space tomography of fast-ion D-alpha spectroscopy and collective Thomson scattering measurements. / Jacobsen, Asger Schou; Salewski, Mirko; Geiger, B.; Korsholm, Søren Bang; Leipold, Frank; Nielsen, Stefan Kragh; Rasmussen, Jesper; Pedersen, Morten Stejner; Weiland, M.

In: Plasma Physics and Controlled Fusion, Vol. 58, No. 4, 042002, 2016.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Benchmark and combined velocity-space tomography of fast-ion D-alpha spectroscopy and collective Thomson scattering measurements

AU - Jacobsen, Asger Schou

AU - Salewski, Mirko

AU - Geiger, B.

AU - Korsholm, Søren Bang

AU - Leipold, Frank

AU - Nielsen, Stefan Kragh

AU - Rasmussen, Jesper

AU - Pedersen, Morten Stejner

AU - Weiland, M.

PY - 2016

Y1 - 2016

N2 - We demonstrate the combination of fast-ion D-alpha spectroscopy (FIDA) and collective Thomson scattering (CTS) measurements to determine a common best estimate of the fastion velocity distribution function by velocity-space tomography. We further demonstrate a benchmark of FIDA tomography and CTS measurements without using a numerical simulation as common reference. Combined velocity-space tomographies from FIDA and CTS measurements confirm that sawtooth crashes reduce the fast-ion phase-space densities in the plasma center and affect ions with pitches close to one more strongly than those with pitches close to zero.

AB - We demonstrate the combination of fast-ion D-alpha spectroscopy (FIDA) and collective Thomson scattering (CTS) measurements to determine a common best estimate of the fastion velocity distribution function by velocity-space tomography. We further demonstrate a benchmark of FIDA tomography and CTS measurements without using a numerical simulation as common reference. Combined velocity-space tomographies from FIDA and CTS measurements confirm that sawtooth crashes reduce the fast-ion phase-space densities in the plasma center and affect ions with pitches close to one more strongly than those with pitches close to zero.

KW - Velocity-space tomography

KW - Collective Thomson scattering

KW - Fast-ion D-alpha spectroscopy

KW - Sawtooth crash

KW - Tokamak

U2 - 10.1088/0741-3335/58/4/042002

DO - 10.1088/0741-3335/58/4/042002

M3 - Journal article

VL - 58

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

SN - 0741-3335

IS - 4

M1 - 042002

ER -