Using Poisson-regularized inversion of Bremsstrahlung emission to extract full electron energy distribution functions from x-ray pulse-height detector data

Swanson, C.; Jandovitz, P.; Cohen, S. A.

doi:10.1063/1.5019572

Title: Using Poisson-regularized inversion of Bremsstrahlung emission to extract full electron energy distribution functions from x-ray pulse-height detector data

Abstract

We measured Electron Energy Distribution Functions (EEDFs) from below 200 eV to over 8 keV and spanning five orders-of-magnitude in intensity, produced in a low-power, RF-heated, tandem mirror discharge in the PFRC-II apparatus. The EEDF was obtained from the x-ray energy distribution function (XEDF) using a novel Poisson-regularized spectrum inversion algorithm applied to pulse-height spectra that included both Bremsstrahlung and line emissions. The XEDF was measured using a specially calibrated Amptek Silicon Drift Detector (SDD) pulse-height system with 125 eV FWHM at 5.9 keV. Finally, the algorithm is found to out-perform current leading x-ray inversion algorithms when the error due to counting statistics is high.

Authors:

^[1];

^[1]

Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Publication Date:: Tue Feb 27 00:00:00 EST 2018

Research Org.:: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1430534

Alternate Identifier(s):: OSTI ID: 1422859

Grant/Contract Number:: AC02-76CH03073; AC02-76CHO3073

Resource Type:: Accepted Manuscript

Journal Name:: AIP Advances

Additional Journal Information:: Journal Volume: 8; Journal Issue: 2; Journal ID: ISSN 2158-3226

Publisher:: American Institute of Physics (AIP)

Country of Publication:: United States

Language:: English

Subject:: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats


                    Swanson, C., Jandovitz, P., and Cohen, S. A. Using Poisson-regularized inversion of Bremsstrahlung emission to extract full electron energy distribution functions from x-ray pulse-height detector data.  United States: N. p., 2018. 
Web.  doi:10.1063/1.5019572.

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                    Swanson, C., Jandovitz, P., & Cohen, S. A. Using Poisson-regularized inversion of Bremsstrahlung emission to extract full electron energy distribution functions from x-ray pulse-height detector data.  United States.  https://doi.org/10.1063/1.5019572

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                    Swanson, C., Jandovitz, P., and Cohen, S. A. Tue .  
"Using Poisson-regularized inversion of Bremsstrahlung emission to extract full electron energy distribution functions from x-ray pulse-height detector data".  United States.  https://doi.org/10.1063/1.5019572.  https://www.osti.gov/servlets/purl/1430534.

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@article{osti_1430534,

  title        = {Using Poisson-regularized inversion of Bremsstrahlung emission to extract full electron energy distribution functions from x-ray pulse-height detector data},

  author       = {Swanson, C. and Jandovitz, P. and Cohen, S. A.},

  abstractNote = {We measured Electron Energy Distribution Functions (EEDFs) from below 200 eV to over 8 keV and spanning five orders-of-magnitude in intensity, produced in a low-power, RF-heated, tandem mirror discharge in the PFRC-II apparatus. The EEDF was obtained from the x-ray energy distribution function (XEDF) using a novel Poisson-regularized spectrum inversion algorithm applied to pulse-height spectra that included both Bremsstrahlung and line emissions. The XEDF was measured using a specially calibrated Amptek Silicon Drift Detector (SDD) pulse-height system with 125 eV FWHM at 5.9 keV. Finally, the algorithm is found to out-perform current leading x-ray inversion algorithms when the error due to counting statistics is high.},

  doi          = {10.1063/1.5019572},

  journal      = {AIP Advances},

  number       = 2,

  volume       = 8,

  place        = {United States},

  year         = {Tue Feb 27 00:00:00 EST 2018},

  month        = {Tue Feb 27 00:00:00 EST 2018}

}

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Works referenced in this record:

RHESSI Observations of Particle Acceleration and Energy Release in an Intense Solar Gamma-Ray Line Flare
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Application of deconvolution methods to gamma-radiation spectra of thermonuclear plasma
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Electron Bremsstrahlung Hard X-Ray Spectra, Electron Distributions, and Energetics in the 2002 July 23 Solar Flare
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Evaluation of Algorithms for Reconstructing Electron Spectra from Their Bremsstrahlung Hard X‐Ray Spectra
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Works referencing / citing this record:

Demonstration of fast-electron populations in a low-pressure, low-power, magnetized RF plasma source
journal, March 2018

Jandovitz, P.; Swanson, C.; Matteucci, J.
Physics of Plasmas, Vol. 25, Issue 3
DOI: 10.1063/1.4998735

Spontaneous multi-keV electron generation in a low-RF-power axisymmetric mirror machine
journal, June 2019

Swanson, C.; Cohen, S. A.
Physics of Plasmas, Vol. 26, Issue 6
DOI: 10.1063/1.5093905

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Title: Using Poisson-regularized inversion of Bremsstrahlung emission to extract full electron energy distribution functions from x-ray pulse-height detector data

Abstract

Citation Formats

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