Consistency between experimental observation and NC transport analysis
enables detailed prediction of parallel flow in presence of external momentum
20
10
0
CXRS
NC transport
analysis
-10
||
Ctr-NB
-20
20
10
High  config.
(b)
Co-NB
0
Ctr-NB NC transport
analysis
||
v , <u B>/B (km/s)
-10
||
• Observation of reduction in parallel flow
velocity both in co- and counter-NBI plasmas in
the core region of high  configuration.
• Experimentally observed parallel flow is
generally consistent with NC transport analysis
based on Sugama-Nishimura method including
effects of external momentum force by NBI.
• Prediction of spontaneous flow in peripheral
region by thermodynamic force driven by
pressure, temperature and potential gradients.
STD  config.
(a) Co-NB
||
v , <u B>/B (km/s)
• Experimental investigation of effect of magnetic
ripple on parallel flow in a heliotron device,
Heliotron J (R/a=1.2/0.17m).
• High ripple configuration has 2-3 times higher
magnetic ripple strength  (=(B/s)2/B21/2) than
that for standard case in the core region.
S. Kobayashi et al., EX/P4-28
-20
0
CXRS
0.2
0.4
0.6
r/a
0.8
1

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