Page 11 - Jet Outflow and Open Field Line Measurements on C-2U Device
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Stability of Tilt Mode
• Tilt mode growth rate is reduced by kinetic effects
• • •
3D Hybrid PIC simulations with FPIC code Fully kinetic ions, fluid electrons
Ohm’s law, no displacement current
• Density evolution
γ/γMHD 0.8
0.6 0.4 0.2
• Growth rate agrees with analytic theory (Steinhauer 2011)
E = 3.27
E = 4.52 exp(-3 E/S*)
time
•
0.06μs 65.5μs 87.8μs
91.4μs 104.1μs
127.2μs
0 0.1 0.2 0.3 0.4 0.5 0.6
E/S*
Nonlinear saturation of tilt leading to new FRC equilibrium (c.f. Belova 2004, HYM simulations)
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