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Dimensionless collisionality scans for core particle transport in JET

T. Tala ; P. Mantica ; A. Salmi ; C. Bourdelle ; C. Giroud ; J. Hillesheim ; C. Maggi ; L. Meneses ; M. Maslov ; S. Menmuir ; S. Moradi ; S. Mordijck ; V. Naulin ; Hans Nordman (Institutionen för rymd- och geovetenskap, Plasmafysik och fusionsenergi) ; J. J. Rasmussen ; G. Sips ; A. Sirinelli ; M. Tsalas ; H. Weisen
42nd European Physical Society Conference on Plasma Physics, EPS 2015, Lisbon, Portugal, 22-26 June 2015 (2015)
[Konferensbidrag, övrigt]

Density peaking increases in the inner core (r/a=0.3) from 0.3 to 2.7 and in the outer core (r/a=0.8) from 1.6 to 3.5 when ν∗ decreases from 0.47 to 0.09 in JET H-mode plasmas while density peaking does not depend on ν∗ in JET L-mode plasma. For this particular scan, experimental evidence indicates that a dominant part of this peaking originates from NBI fuelling and inward pinch is a subdominant fraction. This is supported by the simple linear runs with GYRO although much more work is needed here to make a conclusion. More discharges are needed to quantify more precisely the fractions of these two contributions and also much more work is required on the modelling front to make exact comparisons.



Denna post skapades 2016-09-28.
CPL Pubid: 242472

 

Institutioner (Chalmers)

Institutionen för rymd- och geovetenskap, Plasmafysik och fusionsenergi

Ämnesområden

Plasmafysik

Chalmers infrastruktur