%PDF-1.6
%
1 0 obj
<<
/Author(Wilkie, G., Iantchenko, A., Abel, I. et al)
/CreationDate(D:20180627174007+05'30')
/Creator(IOPP)
/CrossMarkDomains#5B1#5D(iop.org)
/CrossMarkMajorVersionDate(2018-6-29)
/CrossmarkDomainExclusive(true)
/ModDate(D:20240319035122+00'00')
/Producer(PDFsharp 1.50.5147 \(www.pdfsharp.com\) \(Original: Adobe PDF Library 15.0; modified using iText 5.5.10 2000-2015 iText Group NV \(AGPL-version\)\))
/Subject(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.)
/Title(First principles of modelling the stabilization of microturbulence by fast ions)
/Trapped/False
/doi(10.1088/1741-4326/aab727)
/robots(noindex)
/Keywords(microturbulence, simulation, stabilization, fast ions, turbulence, gyrokinetics, )
>>
endobj
2 0 obj
<<
/Length 6356
/Subtype/XML
/Type/Metadata
>>
stream
application/pdf
doi:10.1088/1741-4326/aab727
First principles of modelling the stabilization of microturbulence by fast ions
G.J. Wilkie
A. Iantchenko
I.G. Abel
E. Highcock
I. Pusztai
JET Contributors
IOP Publishing
Nuclear Fusion, 58 (© EURATOM 2018) aab727. doi: 10.1088/1741-4326/aab727
journal
Nuclear Fusion
© EURATOM 2018
0029-5515
1
15
aab727
10.1088/1741-4326/aab727
https://doi.org/10.1088/1741-4326/aab727
2018-6-29
true
10.1088/1741-4326/aab727
iop.org
10.1088/1741-4326/aab727
noindex
2018-6-29
true
iop.org
IOPP
2018-09-19T09:16:10+02:00
2018-09-19T09:16:10+02:00
True
VoR
http://iopscience.iop.org/page/copyright
Adobe PDF Library 15.0; modified using iText® 5.5.10 ©2000-2015 iText Group NV (AGPL-version)
uuid:4f584d2e-1e9b-41b7-8be4-f92b2ac31b4e
uuid:d7126485-0fab-4e34-b569-89eb8bd6318d
Vetenskapsrådet
endstream
endobj
3 0 obj
<<
/Annots 4 0 R
/ArtBox[0 0 595.276 841.89]
/BleedBox[0 0 595.276 841.89]
/Contents 5 0 R
/CropBox[0 0 595.276 841.89]
/MediaBox[0 0 595.276 841.89]
/Parent 2289 0 R
/Resources
<<
/ExtGState
<<
/GS0 6 0 R
/GS1 7 0 R
/GS2 8 0 R
>>
/Font
<<
/T1_0 9 0 R
/T1_1 10 0 R
/T1_10 11 0 R
/T1_11 12 0 R
/T1_12 13 0 R
/T1_13 14 0 R
/T1_14 15 0 R
/T1_15 16 0 R
/T1_16 17 0 R
/T1_17 18 0 R
/T1_18 19 0 R
/T1_19 20 0 R
/T1_2 21 0 R
/T1_20 22 0 R
/T1_21 23 0 R
/T1_22 24 0 R
/T1_23 25 0 R
/T1_24 26 0 R
/T1_25 27 0 R
/T1_26 28 0 R
/T1_27 29 0 R
/T1_28 30 0 R
/T1_29 31 0 R
/T1_3 32 0 R
/T1_4 33 0 R
/T1_5 34 0 R
/T1_6 35 0 R
/T1_7 36 0 R
/T1_8 37 0 R
/T1_9 38 0 R
>>
/ProcSet[/PDF/Text]
/Properties
<<
/MC0 39 0 R
/MC1 40 0 R
/MC2 41 0 R
/MC3 42 0 R
/MC4 43 0 R
>>
/XObject
<<
/Fm0 44 0 R
>>
>>
/Rotate 0
/Thumb 45 0 R
/TrimBox[0 0 595.276 841.89]
/Type/Page
/Group
<<
/CS/DeviceRGB
/S/Transparency
>>
>>
endobj
4 0 obj
[
46 0 R 47 0 R 48 0 R 49 0 R 50 0 R 51 0 R 52 0 R 53 0 R 54 0 R 55 0 R 56 0 R 57 0 R 58 0 R 59 0 R 60 0 R 61 0 R 62 0 R 63 0 R 64 0 R 65 0 R 66 0 R 67 0 R 68 0 R 69 0 R 70 0 R 71 0 R 72 0 R
]
endobj
5 0 obj
<<
/Filter/FlateDecode
/Length 6195
>>
stream
HWnH}W#h^tv 9qٙ0vhmcE{ye,b쮮:uzbWMa2\o!GUk"Xo:hn0u>'wi?:}JLn?Iߘx+&Gw^tma;+vO`?xO~k}
6-HnGN@hm_[m,#Z'X=7\nu_
XWQgqmՕU^_sCS慒Gv;l&ZI>zbؾ8t#^ "[?jwSz|GU*!3*DP <y(l۔RקϮXŹ9 :*LDۇ622&Ubr_>d"#Z*q=?|ɷT:SE')Yb%`j[6\5ȹ)rd8Xzå*Ʌ\(eVyY{AXƹw6g2Lf ng5clWaWwJrR /
#'A71z@@V5EXTשCR")7ۏnq7iRJ*{bzpP«@ysù{_HXA@Z֯.
.Wl*Ů TH8;(B7
}D
jDU
X?4K*8LM(ju$*r!۰m.,uU[%ƍHO悩3/;G]^s{qrswTJJ,y@R'wοMsujĞJV*|#b)N#bgRιyO@S˥
M6NS!
@hA٨x*I&鋩9Q [m2<;GL,R;