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TRANSP activity at JET (2004)

TRANSP activity at JET (2004). 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).

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TRANSP activity at JET (2004)

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  1. TRANSP activity at JET (2004)

  2. 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 forclearance, 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

  3. 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)

  4. 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/a=0.5 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

  5. 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

  6. 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

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