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

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Title
Diagnosis of warm dense conditions in foil targets heated by intense femtosecond laser pulses using K alpha imaging spectroscopy
Author(s)
Bae, LJ; Zastrau, U; Chung, HK; Bernstein, AC; M. S. Cho; Dyer, GM; Galtier, E; He, ZH; Heimann, PA; G. B. KANG; Kim, M; Kim, YH; Lee, HJ; Lee, JW; Nagler, B; Thomas, AGR; B. I. CHO
Publication Date
2018-03
Journal
OPTICS EXPRESS, v.26, no.5, pp.6294 - 6301
Publisher
OPTICAL SOC AMER
Abstract
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 K alpha 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. K alpha line shapes are strongly affected by warm (5-40 eV) bulk electron temperatures and imply multiple temperature distributions in the targets. 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. © 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
URI
https://pr.ibs.re.kr/handle/8788114/5004
ISSN
1094-4087
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > Journal Papers (저널논문)
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