Electron temperature and electron number density measurements in laser ablation Z-pinch experiments of Al2O3

Dutra, E. C.; Koch, J. A.; Presura, R.; Wiewior, P.; Covington, A. M.

doi:10.1063/1.5081152

Title: Electron temperature and electron number density measurements in laser ablation Z-pinch experiments of Al2O3

Journal Article · 09 August 2019 · Physics of Plasmas

DOI: https://doi.org/10.1063/1.5081152 · OSTI ID:1549542

Dutra, E. C.; Koch, J. A.;

;

; Covington, A. M.

Aluminum oxide (Al2O3) plasma was generated using the Ti:Sapphire/Nd:glass laser and Z-pinch pulse-power generator at the University of Nevada, Reno, Nevada Terawatt Facility. To determine the electron temperature, we use the Boltzmann plot method for the transitions (Al III 4d 2D3/2 → 4p 2P1/2) at 451.2564 nm, (Al III 4d 2D5/2 → 4p 2P3/2) at 452.9194 nm, (Al III 4p 2P3/2 → 4s 2S1/2) at 569.6603, and (Al III 4p 2P1/2 → 4s 2S1/2) at 572.2728 nm. Simultaneously, Mach–Zehnder laser interferometry was used to measure the electron number density. We compared simulated spectra obtained from PrismSPECT with electron number density and temperature measurements, and the electron temperature was found to range from 1.8 to 2.8 eV, while the electron number density was found to range from 2.3 × 1017 to 6.9 × 1017 cm−3 early in the pinched plasma formation.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: NA0003624

OSTI ID:: 1549542

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Vol. 26 Journal Issue: 8; ISSN 1070-664X

Publisher:: American Institute of PhysicsCopyright Statement

Country of Publication:: United States

Language:: English

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