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

被引：7
|
作者：
Swanson, C. [1 ]
Jandovitz, P. [1 ]
Cohen, S. A. [1 ]
机构：
[1] Princeton Univ, Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA
来源：
AIP ADVANCES | 2018年 / 8卷 / 02期
关键词：
23; SOLAR-FLARE; SPECTRA; IONS; ALGORITHMS; PLASMA;
D O I：
10.1063/1.5019572
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
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. The algorithm is found to out-perform current leading x-ray inversion algorithms when the error due to counting statistics is high. (c) 2018 Author(s).
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页数：15
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