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Spectral tomographic analysis of Bremsstrahlung X-rays generated in a laser-produced plasma

  • Y.J. Rhee (a1) (a2), S.M. Nam (a1), J. Peebles (a3), H. Sawada (a3), M. Wei (a4), X. Vaisseau (a5), T. Sasaki (a5), L. Giuffrida (a5) (a6), S. Hulin (a5), B. Vauzour (a5), J.J. Santos (a5), D. Batani (a5), H.S. McLean (a7), P.K. Patel (a7), Y.T. Li (a8), D.W. Yuan (a9), K. Zhang (a9), J.Y. Zhong (a9), C.B. Fu (a10), N. Hua (a11), K. Li (a11), Y. Zhang (a11), J.Q. Zhu (a11), I.J. Kim (a2) (a12) (a13), J.H. Jeon (a2), T.M. Jeong (a2) (a12), I.W. Choi (a2) (a12), H.W. Lee (a2), J.H. Sung (a2) (a12), S.K. Lee (a2) (a12) and C.H. Nam (a2) (a14)...
Abstract

A new approach is proposed to analyze Bremsstrahlung X-rays that are emitted from laser-produced plasmas (LPP) and are measured by a stack type spectrometer. This new method is based on a spectral tomographic reconstruction concept with the variational principle for optimization, without referring to the electron energy distribution of a plasma. This approach is applied to the analysis of some experimental data obtained at a few major laser facilities to demonstrate the applicability of the method. Slope temperatures of X-rays from LPP are determined with a two-temperature model, showing different spectral characteristics of X-rays depending on laser properties used in the experiments.

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Corresponding author
Address correspondence and reprint requests to: Y.J. Rhee, Korea Atomic Energy Research Institute, Daejeon 34057, Korea and Center for Relativistic Laser Science, Institute for Basic Science (IBS), Gwangju 61005, Korea. E-mail: yjrhee@ibs.re.kr
References
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