英国物理学会
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作者:B.A. Grierson , S.R. Haskey ...
来源:[J].Nuclear Fusion(IF 2.734), 2020, Vol.60 (3)IOP
摘要:Determining the toroidal rotation for future tokamaks like ITER is a challenging and important problem. By combining empirical scalings for the intrinsic rotation at the top of the pedestal with the expected neutral beam torque and modeling of momentum transport, the toroida...
作者:... A. Marinoni , J. McClenaghan , B.A. Grierson
来源:[J].Nuclear Fusion(IF 2.734), 2020, Vol.60 (3)IOP
摘要:Analysis of recent super H-mode experiments on DIII-D shows that high rotation, not high pedestal, plays the essential role in achieving very high confinement . Very high confinement is reached early on in the H-mode phase of these discharges, when the pedestal is still very low,...
作者:B.A. Grierson , O. Izacard ...
来源:[J].Nuclear Fusion(IF 2.734), 2020, Vol.60 (4)IOP
摘要:Experiments in DIII-D show that a particle source location inside the top of the H-mode pedestal (pellets maintains a higher pedestal pressure than an edge source (gas fueling through a widening of the electron temperature pedestal with reduction of the temperature gradient....
作者:B.A. Grierson , T.Y. Xia
来源:[J].Nuclear Fusion(IF 2.734), 2018, Vol.58 (2)IOP
摘要:A six-field two-fluid model has been used to simulate density fluctuations. The equilibrium is generated by experimental measurements for both Deuterium (D) and Hydrogen (H) plasmas at the lowest densities of DIII-D low to high confinement (L-H) transition experiments. In li...
作者:B.A. Grierson , W.F. Guo ...
来源:[J].Nuclear Fusion(IF 2.734), 2017, Vol.57 (5)IOP
摘要:Recent EAST/DIII-D joint experiments on the high poloidal beta regime in DIII-D have extended operation with internal transport barriers (ITBs) and excellent energy confinement ( H 98 y 2 ~ 1.6) to higher plasma current, for lower q 95 ⩽ 7.0, and more b...
作者:B.A. Grierson , R.J. Groebner ...
来源:[J].Nuclear Fusion(IF 2.734), 2019, Vol.59 (8)IOP
摘要:The ‘Super H-Mode’ regime is predicted to enable pedestal height and fusion performance substantially higher than standard H-Mode operation. This regime exists due to a bifurcation of the pedestal pressure, as a function of density, that is predicted by the EPED model to occ...
作者:B.A. Grierson , C.T. Holcomb ...
来源:[J].Nuclear Fusion(IF 2.734), 2017, Vol.57 (11)IOP
摘要:The hybrid regime with beta, collisionality, safety factor and plasma shape relevant to the ITER steady-state mission has been successfully integrated with ELM suppression by applying an odd parity n = 3 resonant magnetic perturbation (RMP). Fully non-inductive hybrids in th...
作者:B.A. Grierson , M. Nakata ...
来源:[J].Nuclear Fusion(IF 2.734), 2017, Vol.57 (5)IOP
摘要:Negative magnetic shear has been demonstrated in DIII-D and JT-60U to mitigate the confinement degradation typically observed with increasing the electron to ion temperature ratio ( T e/ T i). In recent experiments in DIII-D negative central magnetic shear (...
作者:C. Holland , N.T. Howard , B.A. Grierson
来源:[J].Nuclear Fusion(IF 2.734), 2017, Vol.57 (6)IOP
摘要:New multiscale gyrokinetic simulations predict that electron energy transport in a DIII-D ITER baseline discharge with dominant electron heating and low input torque is multiscale in nature, with roughly equal amounts of the electron energy flux Q e coming from lo...
作者:B.A. Grierson , W.W. Heidbrink ...
来源:[J].Nuclear Fusion(IF 2.734), 2017, Vol.57 (1)IOP
摘要:A first-ever demonstration of controlling power and torque injection through time evolution of neutral beam energy has been achieved in recent experiments at the DIII-D tokamak (Luxon 2002 Nucl. Fusion 42 614). Pre-programmed waveforms for the neutral beam energy produce pow...

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