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  • Salewski, M.Tech Univ Denmark, Lyngby, Denmark.;Tech Univ Denmark, Dept Phys, Bldg 309, DK-2800 Lyngby, Denmark. (author)

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

  • Article/chapterEnglish2019

Publisher, publication year, extent ...

  • Institute of Physics Publishing (IOPP),2019
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:kth-270846
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-270846URI
  • https://doi.org/10.1088/1748-0221/14/05/C05019DOI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-387606URI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • QC 20200317
  • The measurement of the energy spectra and densities of alpha-particles and other fast ions are part of the ITER measurement requirements, highlighting the importance of energy-resolved energetic-particle measurements for the mission of ITER. However, it has been found in recent years that the velocity-space interrogation regions of the foreseen energetic-particle diagnostics do not allow these measurements directly. We will demonstrate this for gamma-ray spectroscopy (GRS), collective Thomson scattering (CTS), neutron emission spectroscopy and fast-ion D-alpha spectroscopy by invoking energy and momentum conservation in each case, highlighting analogies and differences between the different diagnostic velocity-space sensitivities. Nevertheless, energy spectra and densities can be inferred by velocity-space tomography which we demonstrate using measurements at JET and ASDEX Upgrade. The measured energy spectra agree well with corresponding simulations. At ITER, alpha-particle energy spectra and densities can be inferred for energies larger than 1.7 MeV by velocity-space tomography based on GRS and CTS. Further, assuming isotropy of the alpha-particles in velocity space, their energy spectra and densities can be inferred by 1D inversion of spectral single-detector measurements down to about 300 keV by CTS. The alpha-particle density can also be found by fitting a model to the CTS measurements assuming the alpha-particle distribution to be an isotropic slowing-down distribution.

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  • Bergsåker, HenrikKTH,Fusionsplasmafysik(Swepub:kth)u1ebt1m5 (author)
  • Bykov, IgorKTH,Fusionsplasmafysik(Swepub:kth)u10mpxru (author)
  • Frassinetti, LorenzoKTH,Fusionsplasmafysik,Tech Univ Denmark, Lyngby, Denmark(Swepub:kth)u1sfgalb (author)
  • Garcia Carrasco, Alvaro,1989-KTH,Fusionsplasmafysik(Swepub:kth)u19t9s7i (author)
  • Hellsten, TorbjörnKTH,Fusionsplasmafysik(Swepub:kth)u16w7v9f (author)
  • Johnson, ThomasKTH,Fusionsplasmafysik(Swepub:kth)u1xypjyh (author)
  • Menmuir, SheenaKTH,Fusionsplasmafysik(Swepub:kth)u12gjaah (author)
  • Petersson, PerKTH,Fusionsplasmafysik(Swepub:kth)u1mnanst (author)
  • Rachlew, ElisabethKTH,Partikel- och astropartikelfysik(Swepub:kth)u12i3o9i (author)
  • Ratynskaia, SvetlanaKTH,Rymd- och plasmafysik(Swepub:kth)u1p4172h (author)
  • Rubel, MarekKTH,Fusionsplasmafysik(Swepub:kth)u1vrej8y (author)
  • Stefániková, EsteraKTH,Fusionsplasmafysik(Swepub:kth)u1lkwyqq (author)
  • Ström, PetterKTH,Fusionsplasmafysik(Swepub:kth)u1uqpnn8 (author)
  • Tholerus, EmmiKTH,Fusionsplasmafysik(Swepub:kth)u15bspw9 (author)
  • Tolias, PanagiotisKTH,Rymd- och plasmafysik(Swepub:kth)u1p3186s (author)
  • Olivares, Pablo VallejosKTH,Fusionsplasmafysik(Swepub:kth)u1mmxwkt (author)
  • Weckmann, ArminKTH,Fusionsplasmafysik(Swepub:kth)u1z0ow6d (author)
  • Zhou, YushanKTH,Fusionsplasmafysik(Swepub:kth)u1ryyfau (author)
  • Zychor, I.Natl Ctr Nucl Res, PL-05400 Otwock, Poland. (author)
  • Nocente, M.Univ Milano Bicocca, Dept Phys, Milan, Italy;CNR, Ist Fis Plasma, Milan, Italy (author)
  • Madsen, B.Tech Univ Denmark, Lyngby, Denmark (author)
  • Abramovic, I.Max Planck Inst Plasma Phys, Greifswald, Germany (author)
  • Gorini, G.Univ Milano Bicocca, Dept Phys, Milan, Italy;CNR, Ist Fis Plasma, Milan, Italy,Culham Sci Ctr, CCFE, Abingdon, Oxon, England (author)
  • Jacobsen, A. S.Culham Sci Ctr, CCFE, Abingdon, Oxon, England (author)
  • Korsholm, S. B.Tech Univ Denmark, Lyngby, Denmark (author)
  • Moseev, D.Max Planck Inst Plasma Phys, Greifswald, Germany (author)
  • Nielsen, S. K.Tech Univ Denmark, Lyngby, Denmark (author)
  • Rasmussen, J.Tech Univ Denmark, Lyngby, Denmark (author)
  • Tardocchi, M.CNR, Ist Fis Plasma, Milan, Italy (author)
  • Geiger, B.Max Planck Inst Plasma Phys, Garching, Germany (author)
  • Eriksson, Jacob,Dr,1985-Uppsala universitet,Tillämpad kärnfysik(Swepub:uu)jacer352 (author)
  • Tech Univ Denmark, Lyngby, Denmark.;Tech Univ Denmark, Dept Phys, Bldg 309, DK-2800 Lyngby, Denmark.Fusionsplasmafysik (creator_code:org_t)

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  • In:Journal of Instrumentation: Institute of Physics Publishing (IOPP)141748-02211748-0221

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