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Determination of Electron Beam Energy in Measuring the Electron-Impact Ionization Cross Section of He-like Fe24

by Takacs, Endre , Gall, Amy , Foster, Adam , Yang, Yang , Hosier, Adam , Dipti , O’Neil, Galen , Tan, Joseph N. , Smith, Randall , Brickhouse, Nancy , Schultz, David R. , Szypryt, Paul , Naing, Aung , Ralchenko, Yuri

in beam energy / EBIT / Electrodes / Electron beams / Electron impact / Electrons / Energy / Ionization cross sections / ionization cross-section / neutralization / space-charge correction / X ray spectra

2023

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Determination of Electron Beam Energy in Measuring the Electron-Impact Ionization Cross Section of He-like Fe24

2023

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Determination of Electron Beam Energy in Measuring the Electron-Impact Ionization Cross Section of He-like Fe24

2023

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Journal Article

Determination of Electron Beam Energy in Measuring the Electron-Impact Ionization Cross Section of He-like Fe24

Takacs, Endre,

Gall, Amy,

Foster, Adam,

Yang, Yang,

Hosier, Adam,

Dipti,

O’Neil, Galen,

Tan, Joseph N.,

Smith, Randall,

Brickhouse, Nancy,

Schultz, David R.,

Szypryt, Paul,

Naing, Aung,

Ralchenko, Yuri

2023

Overview

In an effort to measure electron-impact ionization (EII) cross-sections of He-like Fe24+ at the electron beam ion trap (EBIT) facility of the National Institute of Standards and Technology (NIST), we have experimentally determined the corrections to the nominal beam energy determined by the voltages applied to the EBIT. High-resolution X-ray spectra were recorded at nominal electron beam energies between 6660 eV and 6750 eV using X-ray microcalorimetry based upon an array of 192 transition-edge sensors (TES). A large-scale collisional-radiative simulation of the non-Maxwellian EBIT plasma using relevant atomic data calculated with Flexible Atomic Code allowed us to determine the space-charge correction due to the electron beam including the neutralization factor by the ion cloud of the EBIT.

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Publisher

MDPI AG

Subject

/ EBIT

/ Energy