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Simulating ITER plasma startup and rampdown scenarios in the DIII-D tokamak

G.L. Jackson1,4, T.A. Casper2, T.C. Luce1, D.A. Humphreys1, J.R. Ferron1, A.W. Hyatt1, J.A. Leuer1, T.W. Petrie1, F. Turco3 and W.P. West1

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DIII-D experiments have investigated ITER startup scenarios, including an initial phase where the plasma was limited on low field side poloidal bumper limiters. In addition, li feedback control has been tested with the goal of producing discharges in ITER within the capabilities of the poloidal field coil set and favourable to the intended mode of operations in the subsequent constant current (flattop) phase. These discharges have been modelled using the Corsica free boundary equilibrium code. High performance hybrid scenario discharges (βN = 2.8, H98,y2 = 1.4) and ITER H-mode baseline discharges (βN > 1.6, H98,y2 = 1–1.2) have been obtained experimentally in an ITER similar shape after the ITER-relevant startup. Studies have been initiated to develop a reliable scenario for exiting the burn phase and ramping down the plasma current in ITER without disruptions.


PACS

52.55.Fa Tokamaks, spherical tokamaks

52.80.-s Electric discharges

28.52.Av Theory, design, and computerized simulation

Subjects

Nuclear physics

Plasma physics

Dates

Issue 11 (November 2009)

Received 30 March 2009, accepted for publication 16 September 2009

Published 21 October 2009



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