Simulations of the stationary Q = 10 and the exit phase from the flat-top of an ITER 15MA baseline scenario: predictive JINTRAC simulation with a consistent treatment of D and T in the whole plasma
Journal article, 2024
Designing a robust termination scenario for a burning ITER plasma is a challenge that requires extensive core plasma and divertor modelling. The presented work consists of coupled core/edge/SOL/divertor simulations, performed with the JINTRAC code, to study the Q = 10 flat-top phase and exit phase of the ITER 15 MA/5.3 T DT scenario. The modelling utilizes the recently implemented option to treat deuterium and tritium separately in the SOL/divertor, enabling a consistent treatment of deuterium and tritium in the whole plasma volume, which is a unique capability of JINTRAC. In addition, these are the first JINTRAC simulations of this scenario that use a first-principles transport model to self-consistently model the ECRH power deposition and to include tungsten while keeping track of tungsten sputtering and accumulation. The flat-top simulations demonstrate the possibility of sustaining a steady state fusion Q of 10 using pure deuterium gas puffs together with DT mixed pellets, which is an option to make a more effective use of tritium. Simulations of the exit phase are set up sequentially, with each phase providing initial conditions for the next, starting with a density decay at full current and auxiliary power, and demonstrate the possibility of reducing the density robustly within a few seconds. Following the density decay, a subsequent auxiliary power ramp-down in H-mode is performed with a late H-L transition at low auxiliary power, which may provide an option for the optimization of the plasma termination. The final ramp-down phase consists of a current ramp-down in L-mode to 3.75 MA.
JINTRAC
scenario development
ITER
integrated modelling
Author
F. Eriksson
United Kingdom Atomic Energy Authority
E. Tholerus
United Kingdom Atomic Energy Authority
G. Corrigan
United Kingdom Atomic Energy Authority
Y.F. Baranov
United Kingdom Atomic Energy Authority
X. Bonnin
ITER Organization
D. Farina
National Research Council of Italy (CNR)
L. Figini
National Research Council of Italy (CNR)
Luca Garzotti
United Kingdom Atomic Energy Authority
S.H. Kim
ITER Organization
F. Koechl
ITER Organization
United Kingdom Atomic Energy Authority
A Loarte
ITER Organization
E. Militello Asp
United Kingdom Atomic Energy Authority
C. Olde
United Kingdom Atomic Energy Authority
V.V. Parail
United Kingdom Atomic Energy Authority
S. D. Pinches
ITER Organization
A. R. Polevoi
ITER Organization
Pär Strand
Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics
Nuclear Fusion
00295515 (ISSN) 17414326 (eISSN)
Vol. 64 12 126033Subject Categories (SSIF 2011)
Fusion, Plasma and Space Physics
DOI
10.1088/1741-4326/ad7c63