TRANSP activity at JET

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TRANSP activity at JET (2004)
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1. Analysis of trace Tritium experimental
campaign (I)
1. Thermal Tritium transport
14 MeV neutrons measured along 19 chords (left)
are reproduced in TRANSP by using a proper
adjustment of Tritium transport coefficients
(right, 6 bottom chords are shown)
2 techniques have been used (1) Dt and Vt are
adjusted in TRANSP (2) novel use -combined
TRANSP/SANCO analysis -plasma reactivity is
extracted from TRANSP using 20 runs and
transmitted to SANCO for automatic estimation of
Dt and Vt by minimising ?2-value
Publications K.-D. Zastrow and JET team (EPS
2004, PPCF, 2004 in press), I. Voitsekhovitch, et
al., Trace Tritium transport in H-mode JET plasma
with different density, JET pinboard, waiting for
clearance, to be submitted to Phys. Plasmas and
also in EPS 2004 J. Mailloux et al, EPS 2004 P.
Belo et al., EPS 2004 D. Stork and JET team,
IAEA 2004 D. Stork and JET team, APS 2004
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1. Analysis of trace Tritium experimental
campaign - list of other topics (II)
2. Tritium and fast Deuterium transport induced
by the sawtooth crashes 3. Simulations of
Tritium beam blips, confinement of energetic
particles (G. Gorini et al., EPS 2004 S.
Sharapov et al., IAEA 2004) 4. Particle and
energy transport in ?, ? and ? scans in JET
ELMy H-mode (G. Cordey et al., EPS 2004 D.
McDonald et al, IAEA 2004) 5. NTM effect on
trace Tritium transport (T. Hender et al, EPS
2004)
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2. Transport and confinement in discharges with
Ar seeding
Example experiments with feedback control of Ar
blue - shot w/o Ar, red - with Ar


?i at r/a0.5
D2
Ar
Plasma density
- reduction of thermal transport - different
ELM behaviour (not shown here)
- same NBI and ICRH power and D2 source -
improved particle confinement, density rise
I. Voitsekhovitch, J. Ongena, presented at
S1-Cadarache, 2004 TF-T meeting, JET, 2004
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Other topics/publications 1. M. Valovic, et al.,
Density peaking in low collisionality ELMy H-mode
in JET, PPCF, 2004 2. P. Mantica et al., Progress
in understanding heat transport at JET (EPS 2004,
IAEA 2004) 3. Yu. Baranov et al., Effect of
hysteresis in JET ITB plasma, submitted to
PPCF 4. I. Voitsekhovitch, TRANSP analysis of
hybrid scenarios 5. Data validation with TRANSP -
regular presentations on JET/DVCM meetings
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Requests/proposals for TRANSP development 1.
Synergetic treatment of NBI/ICRH fast particles
(important in view of upgrading the ICRH antenna,
planning of active use of ICRH with relatively
high power during next campaign) 2. TRANSP
documentation physics and assumptions of
different models, not only input 3. Predictive
capability of TRANSP (modelling of particle
transport, flexible use of different modules) 4.
Further development of NCLASS 5. Further
development of sawtooth model - including the
incomplete reconnection