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

Journal Article · Tue Feb 27 00:00:00 EST 2018 · AIP Advances

DOI:https://doi.org/10.1063/1.5019572· OSTI ID:1430534

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

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.

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

Sponsoring Organization:: USDOE

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

OSTI ID:: 1430534

Alternate ID(s):: OSTI ID: 1422859

Journal Information:: AIP Advances, Vol. 8, Issue 2; ISSN 2158-3226

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

Country of Publication:: United States

Language:: English

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Cited by: 5 works

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References (14)

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Cited By (2)

Demonstration of fast-electron populations in a low-pressure, low-power, magnetized RF plasma source Jandovitz, P.; Swanson, C.; Matteucci, J. Physics of Plasmas, Vol. 25, Issue 3 https://doi.org/10.1063/1.4998735	journal	March 2018
Spontaneous multi-keV electron generation in a low-RF-power axisymmetric mirror machine Swanson, C.; Cohen, S. A. Physics of Plasmas, Vol. 26, Issue 6 https://doi.org/10.1063/1.5093905	journal	June 2019

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