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(WFRF:(Eriksson Jacob Dr 1985 )) pers:(Hellesen C) pers:(Conroy Sean)
 

Search: (WFRF:(Eriksson Jacob Dr 1985 )) pers:(Hellesen C) pers:(Conroy Sean) > First principles of...

  • Wilkie, George,1983Chalmers Univ Technol, Dept Phys, SE-41296 Gothenburg, Sweden.,Chalmers tekniska högskola,Chalmers University of Technology (author)

First principles of modelling the stabilization of microturbulence by fast ions

  • Article/chapterEnglish2018

Publisher, publication year, extent ...

  • 2018-06-29
  • IOP PUBLISHING LTD,2018
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:kth-270424
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-270424URI
  • https://doi.org/10.1088/1741-4326/aab727DOI
  • https://research.chalmers.se/publication/504305URI
  • https://research.chalmers.se/publication/254301URI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-398268URI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

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

Notes

  • QC 20200416
  • For complete list of authors see http://dx.doi.org/10.1088/1741-4326/aab727
  • The observation that fast ions stabilize ion-temperature-gradient-driven microturbulence has profound implications for future fusion reactors. It is also important in optimizing the performance of present-day devices. In this work, we examine in detail the phenomenology of fast ion stabilization and present a reduced model which describes this effect. This model is derived from the high-energy limit of the gyrokinetic equation and extends the existing 'dilution' model to account for nontrivial fast ion kinetics. Our model provides a physically-transparent explanation for the observed stabilization and makes several key qualitative predictions. Firstly, that different classes of fast ions, depending on their radial density or temperature variation, have different stabilizing properties. Secondly, that zonal flows are an important ingredient in this effect precisely because the fast ion zonal response is negligible. Finally, that in the limit of highly-energetic fast ions, their response approaches that of the 'dilution' model; in particular, alpha particles are expected to have little, if any, stabilizing effect on plasma turbulence. We support these conclusions through detailed linear and nonlinear gyrokinetic simulations.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Bergsåker, HenricKTH,Fusionsplasmafysik(Swepub:kth)u1ebt1m5 (author)
  • Bykov, IgorKTH,Fusionsplasmafysik(Swepub:kth)u10mpxru (author)
  • Frassinetti, LorenzoKTH,Fusionsplasmafysik(Swepub:kth)u1sfgalb (author)
  • Garcia-Carrasco, AlvaroKTH,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, Elisabeth,1944-KTH,Fysik(Swepub:kth)u12i3o9i (author)
  • Ratynskaia, SvetlanaKTH,Rymd- och plasmafysik(Swepub:kth)u1p4172h (author)
  • Rubel, MarekKTH,Fusionsplasmafysik(Swepub:kth)u1vrej8y (author)
  • Stefanikova, 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, YushunKTH,Fusionsplasmafysik(Swepub:kth)u1ryyfau (author)
  • Zychor, I.Natl Ctr Nucl Res, PL-05400 Otwock, Poland. (author)
  • Iantchenko, Aylwin,1993Ecole Polytechnique Federale de Lausanne (EPFL),Swiss Federal Institute of Technology in Lausanne (EPFL),Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)aylwin (author)
  • Abel, Ian,1985Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)ianab (author)
  • Hood Highcock, Edmund,1985Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)highcock (author)
  • Pusztai, Istvan,1983Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)pusztai (author)
  • Andersson Sundén, ErikUppsala universitet,Tillämpad kärnfysik(Swepub:uu)erasu959 (author)
  • Binda, F. (author)
  • Cecconello, MarcoUppsala universitet,Tillämpad kärnfysik(Swepub:uu)marce924 (author)
  • Conroy, SeanUppsala universitet,Tillämpad kärnfysik(Swepub:uu)sco17122 (author)
  • Dzysiuk, N. (author)
  • Ericsson, GöranUppsala universitet,Tillämpad kärnfysik(Swepub:uu)ger17122 (author)
  • Eriksson, Jacob,Dr,1985-Uppsala universitet,Tillämpad kärnfysik(Swepub:uu)jacer352 (author)
  • Hellesen, C. (author)
  • Hjalmarsson, AndersUppsala universitet,Tillämpad kärnfysik(Swepub:uu)ahj25356 (author)
  • Possnert, Göran,1951-Uppsala universitet,Högenergifysik,Tillämpad kärnfysik(Swepub:uu)gpo27116 (author)
  • Sjöstrand, Henrik,1978-Uppsala universitet,Tillämpad kärnfysik(Swepub:uu)hesjo677 (author)
  • Skiba, M. (author)
  • Weiszflog, MatthiasUppsala universitet,Tillämpad kärnfysik(Swepub:uu)mwe25666 (author)
  • Chalmers Univ Technol, Dept Phys, SE-41296 Gothenburg, Sweden.Chalmers tekniska högskola (creator_code:org_t)

Related titles

  • In:Nuclear Fusion: IOP PUBLISHING LTD58:80029-55151741-4326

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