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Diagnosis of ultrafast surface dynamics of thin foil targets irradiated by intense laser pulses

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Title
Diagnosis of ultrafast surface dynamics of thin foil targets irradiated by intense laser pulses
Author(s)
Bae, Lee Jin; G. B. KANG; Kim, Minju; G. S. LEE; J. H. SOHN; C. H. NAM; B. I. CHO
Publication Date
2023-02
Journal
Optics Express, v.31, no.4, pp.5767 - 5776
Publisher
Optica Publishing Group (formerly OSA)
Abstract
The temporal modulation of an electron bunch train accelerated from a foil target irradiated by an intense laser pulse is studied by measuring the coherent transition radiation (CTR) from the rear surface of a target. We experimentally obtained CTR spectra from a 1 μm thick foil target irradiated at a maximum intensity of 6.5 × 1019 W/cm2. Spectral redshifts of the emitted radiation corresponding to increases in laser intensity were observed. These measurements were compared with the theoretical calculation of CTR spectra considering ultrafast surface dynamics, such as plasma surface oscillation and relativistically induced transparency. Plasma surface oscillations induce a spectral redshift, while relativistic transparency causes a spectral blueshift. Both effects are required to find reasonable agreement with the experiment over the entire range of laser intensities. © 2023 Optica Publishing Group.
URI
https://pr.ibs.re.kr/handle/8788114/13106
DOI
10.1364/OE.474759
ISSN
1094-4087
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > 1. Journal Papers (저널논문)
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