Statistical analysis of non-Maxwellian electron distribution functions measured with angularly resolved Thomson scattering

Milder, A. L.; Katz, J.; Boni, R.; Palastro, J. P.; Sherlock, M.; Rozmus, W.; Froula, D. H.

doi:10.1063/5.0041504

Title: Statistical analysis of non-Maxwellian electron distribution functions measured with angularly resolved Thomson scattering

Journal Article · 01 August 2021 · Physics of Plasmas

DOI: https://doi.org/10.1063/5.0041504 · OSTI ID:1820547

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Lab. for Laser Energetics, Rochester, NY (United States); Univ. of Rochester, NY (United States)
Lab. for Laser Energetics, Rochester, NY (United States)
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Univ. of Alberta, Edmonton, AB (Canada)

Angularly resolved Thomson scattering is a novel extension of Thomson scattering, enabling the measurement of the electron velocity distribution function over many orders of magnitude. Here, details of the theoretical basis of the technique and the instrument designed for this measurement are described. Angularly resolved Thomson-scattering data from several experiments are shown with descriptions of the corresponding distribution functions. A reduced model describing the distribution function is given and used to perform a Monte Carlo analysis of the uncertainty in the measurements. The electron density and temperature were determined to a precision of 12% and 21%, respectively, on average, while all other parameters defining the distribution function were generally determined to better than 20%. It was found that these uncertainties were primarily due to limited signal to noise and instrumental effects. Furthermore, measurements with this level of precision were sufficient to distinguish between Maxwellian and non-Maxwellian distribution functions.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Univ. of Rochester, NY (United States). Lab. for Laser Energetics

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: AC52-07NA27344; NA0003856

OSTI ID:: 1820547

Report Number(s):: LLNL-JRNL--826649; 1040875

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 8 Vol. 28; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Statistical analysis of non-Maxwellian electron distribution functions measured with angularly resolved Thomson scattering

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