Conclusions
distribution has T|| >> Te
Validated by X-ray spect
Programmable Models for Real-Time, Reconfigurable I/O (RIO) Plasma Control
References
[1] L. Zheng, W. Horton, H. Miura, T. H. Shi and H. Q. Wang, Nonneutralized charge effects on tokamak edge
magnetohydrodynamic stability, Phys. Letts A 380, 2654-2657 (2016).
[2] ] W. Horton, M. Goniche, Y. Peysson, J. Decker, A. Ekedahl, and X. Litaudon,
Phys. Plasmas 20, 112508 (2013) and J. Decker, Y. Peysson et al. PoP 21, 092504 (2014)
[3] I. Keramidas Charidakos, F. Waelbroeck, and P. J. Morrison, “Hamiltonian Five-Field Gyrofluid Model”, Phys. Plasmas 22,
112113 (2015)
[4] T. Kroetz, M. Roberto, I. L. Caldas, R. L. Viana, P. J. Morrison, “Integrable Maps with Non-Trivial Topology: Application to
Divertor Configurations”, Nuclear Fusion 50, 034003 (14pp(2010)
and.
W. Horton , L. Zheng, A. Arefiev, C. Michoski, P. J. Morrison and F. L. Waelbroeck
1institute For Fusion Studies, University Of Texas At Austin, Austin, Texas, USA
Email: [email protected]
j
fe(x, p||, p^ ,t)
Non-neutralized electrons confined in closed field line repel each other giving a linked spring model of stabilizing The repulsion between electrons leads to an hoop forces -- similar to the thermal pressure electric potential. The effective pressure gradient in model Shrinks the Unstable domain in the MHD Balloong mode stability equation Ref. 1
Steady State Turbulent ITER-like Plasmas with RF Drivers
LHCD shown as an effective method to maintain stable control tokamak current profiles is in a stable steady-state. Ref.2 With properties:
- Efficient and Synergistic steady-state heating and current control
current penetration aided by ETG plasma density fluctuations
- ETG turbulence modified by the RF driven three-component electron phase
space density function f3T (p|| p, r, t; PRF ) from RF power PRF(t).
(i ) Radial gradients of the moments j|| (r ), Te || (r ), Te (r ) and q|| (r) change the
complex stability problem for the low frequency electromagnetic turbulence and
the associated transport.
(ii) Turbulent pitch-angle scattering from magnetic turbulence weakens the
current drive efficiency but provides stability against the runaway currents of
induction driven toroidal currents.
TH/P3-30
IAEA Kyoto
TH/P3-30
Acknowledgments:
The work is supported by the Institute for Fusion Studies thru the Dept of Energy Grant DE-FG02-04ER54742.
The simulations were performed at TACC, NERSC Computer Center and the Cadaradce-IRFM Computers.
Collaborations with Aix-Marseille University, France and Sao Paulo University, Brazil.
I -Mode physics with increase stability and low noise inside Separatrix
Non-neutralized electron
effects • Non-neutralized electrons confined in closed field line
repulse each other and behave as if a linked spring system (Fig.2a).
• The repulsion between electrons leads to an outward hoop force. This is similar to the thermal pressure (Fig.2b).
• This repulsive force differs from surface to surface, that affects the system magnetic well (Fig.3).
Fig.2a Fig.2b Fig.3
May 10, 2016
Westlake, Hangzhou
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