Simulation and mitigation of the magneto-Rayleigh-Taylor instabilities in Z-pinch gas discharge extreme ultraviolet plasma radiation sources
- Department of Energy Sciences, Tokyo Institute of Technology, 4259 J2-35 Nagatsuta, Midori-ku, Yokohama 226-8502 (Japan)
The development and use of a single-fluid two-temperature approximated 2-D Magneto-Hydrodynamics code is reported. Z-pinch dynamics and the evolution of Magneto-Rayleigh-Taylor (MRT) instabilities in a gas jet type Extreme Ultraviolet (EUV) source are investigated with this code. The implosion and stagnation processes of the Z-pinch dynamics and the influence of initial perturbations (single mode, multi- mode, and random seeds) on MRT instability are discussed in detail. In the case of single mode seeds, the simulation shows that the growth rates for mm-scale wavelengths up to 4 mm are between 0.05 and 0.065 ns{sup −1}. For multi-mode seeds, the mode coupling effect leads to a series of other harmonics, and complicates MRT instability evolution. For perturbation by random seeds, the modes evolve to longer wavelengths and finally converge to a mm-scale wavelength approximately 1 mm. MRT instabilities can also alter the pinch stagnation state and lead to temperature and density fluctuations along the Z axis, which eventually affects the homogeneity of the EUV radiation output. Finally, the simulation results are related to experimental results to discuss the mitigations of MRT instability.
- OSTI ID:
- 22218413
- Journal Information:
- Physics of Plasmas, Vol. 20, Issue 11; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Investigation of magnetic field effects on the mitigation of the magnetohydrodynamic Rayleigh-Taylor instability in fast z-pinch implosions
Computational investigation of single mode vs multimode Rayleigh{endash}Taylor seeding in Z-pinch implosions
Related Subjects
APPROXIMATIONS
DISTURBANCES
ELECTRON TEMPERATURE
EXTREME ULTRAVIOLET RADIATION
HARMONICS
IMPLOSIONS
ION TEMPERATURE
LINEAR Z PINCH DEVICES
MAGNETOHYDRODYNAMICS
PLASMA DENSITY
PLASMA JETS
PLASMA SIMULATION
RADIATION SOURCES
RANDOMNESS
RAYLEIGH-TAYLOR INSTABILITY
WAVELENGTHS