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VERSION:2.0
PRODID:-//Memento EPFL//
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SUMMARY:"Free-boundary simulations of ITER advanced scenarios"
DTSTART:20130516T143000
DTEND:20130516T153000
DTSTAMP:20260501T175437Z
UID:be10a500cdedf20d6f864cf4d46ab8107413297658e2d4901be541be
CATEGORIES:Conferences - Seminars
DESCRIPTION:Karim Besseghir\, CRPP-EPFL\nThe successful operation of ITER 
 advanced scenarios is likely to be a major step forward towards controlled
  fusion. ITER advanced scenarios raise specific challenges that are not en
 countered in presently-operated tokamak. Three such challenges are present
 ed.\nFirstly\, a novel approach to current density profile modification is
  introduced and the results of exploratory studies are exposed. Secondly\,
  it is argued that the design of ITER scenario should be automated. Such s
 cenario design automation is tackled using optimal control techniques and 
 the results are discussed. Real-time optimisation schemes are discussed an
 d it is concluded that the necessary conditions of optimality tracking app
 roach may potentially be appropriate for ITER operation\, thus offering a 
 viable closed-loop optimal control approach. Finally\, the DINA-CH&CRONOS 
 full tokamak simulator is used to simulate the operation of the ITER hybri
 d and steady-state scenarios. It is concluded that the present ITER design
  is appropriate for performing a hybrid scenario pulse lasting more than 1
 000s\, with a flat-top plasma current of 12MA\, and a fusion gain of Q=8. 
 Similarly\, a steady-state scenario without internal transport barrier\, w
 ith a flat-top plasma current of 10MA\, and with a fusion gain of Q=5 can 
 be realised using the present ITER design.
LOCATION:CRPP\, PPB 019
STATUS:CONFIRMED
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