skip to main content

SciTech ConnectSciTech Connect

Title: Simulation and mitigation of the magneto-Rayleigh-Taylor instabilities in Z-pinch gas discharge extreme ultraviolet plasma radiation sources

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.
Authors:
; ; ; ; ; ; ; ; ;  [1]
  1. Department of Energy Sciences, Tokyo Institute of Technology, 4259 J2-35 Nagatsuta, Midori-ku, Yokohama 226-8502 (Japan)
Publication Date:
OSTI Identifier:
22218413
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 20; Journal Issue: 11; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 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