Diagnosis of warm dense conditions in foil targets heated by intense femtosecond laser pulses using Kα imaging spectroscopy

Bae, L. J.; Zastrau, U.; Chung, H. -K.; Bernstein, A. C.; Cho, M. S.; Dyer, G. M.; Galtier, E.; He, Z. -H.; Heimann, P. A.; Kang, G. B.; Kim, M.; Kim, Y. H.; Lee, H. J.; Lee, J. W.; Nagler, B.; Thomas, A. G. R.; Cho, B. I.

doi:10.1364/OE.26.006294

Title: Diagnosis of warm dense conditions in foil targets heated by intense femtosecond laser pulses using Kα imaging spectroscopy

Journal Article · Thu Mar 01 00:00:00 EST 2018 · Optics Express

DOI:https://doi.org/10.1364/OE.26.006294· OSTI ID:1423403

Bae, L. J.; Zastrau, U.; Chung, H. -K.; Bernstein, A. C.; Cho, M. S.; Dyer, G. M.; Galtier, E.; He, Z. -H.; Heimann, P. A.; Kang, G. B.; Kim, M.; Kim, Y. H.; Lee, H. J.; Lee, J. W.; Nagler, B.; Thomas, A. G. R.; Cho, B. I.

Warm dense conditions in titanium foils irradiated with intense femtosecond laser pulses are diagnosed using an x-ray imaging spectroscopy technique. The line shapes of radially resolved titanium Kα spectra are measured with a toroidally bent GaAs crystal and an x-ray charge-coupled device. Measured spectra are compared with the K-shell emissions modeled using an atomic kinetics – spectroscopy simulation code. Kα line shapes are strongly affected by warm (5-40 eV) bulk electron temperatures and imply multiple temperature distributions in the targets. Finally, the spatial distribution of temperature is dependent on the target thickness, and a thin target shows an advantage to generate uniform warm dense conditions in a large area.

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Research Organization:: SLAC National Accelerator Lab., Menlo Park, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: AC02-76SF00515; IBS-R012-D1

OSTI ID:: 1423403

Alternate ID(s):: OSTI ID: 1437353

Journal Information:: Optics Express, Journal Name: Optics Express Vol. 26 Journal Issue: 5; ISSN 1094-4087

Publisher:: Optical Society of America (OSA)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 6 works

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