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                    -Shell Spectra from CH-Tamped Aluminum Layers Irradiated with Intense Femtosecond Laser Pulses

Xiong, Gang; Zhao, Yang; Shang, Wanli; Hu, Zhimin; Zhu, T; Wei, Minxi; Gao, Yang; Zhang, Jiyan; Yang, Jiamin

doi:10.1088/0256-307x/27/9/095202

Chinese Phys. Lett.

2010

DOI: 10.1088/0256-307x/27/9/095202

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K -Shell Spectra from CH-Tamped Aluminum Layers Irradiated with Intense Femtosecond Laser Pulses

Gang Xiong¹,

Yang Zhao²,

Wanli Shang³

et al.

Abstract: X-ray spectra of H-like and He-like aluminum ions from aluminum buried in CH layers irradiated with 30 fs, 200 TW laser are measured. The electron temperature and density are derived from line ratios of the He-𝛼 resonance line to its satellite lines. Typical temperatures of 490-646 eV and electron densities up to 7 × 10 20 cm −3 are obtained. The results show that the electron density increases and temperature decreases with the increasing CH thickness.

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Cited by 2 publications

References 29 publications

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Electron temperature and density characterization using L-shell spectroscopy of laser irradiated buried iron layer targets

et al. 2014

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Uniform high density plasmas of different materials with properties relevant to the interior of stars and to inertial fusion can be created by laser irradiation of targets containing a buried layer of the material. Buried layer targets also enable the diagnosis of hot and thermal electron, x-ray and ion heating of targets. In this paper, L-emission spectroscopy from an iron layer (thickness 77 nm) encased in an otherwise plastic target (of thickness 240 nm–1.36 μm on the laser side) is irradiated by 0.53 μm wavelength, 2 ps duration laser pulses at irradiances of 1017–1018 Wcm−2. The relative iron L-emission from Li-like Fe XXIV to Ne-like Fe XVII is used to diagnose the plasma conditions of temperature and density in the iron layer. As the upper quantum states of the L-emission lines are in local thermodynamic equilibrium, line intensity ratios depend on both electron temperature and density, which—we show—enables the simultaneous measurement of both electron temperature and density by considering several line intensity ratios. We also show that hot electron target heating and the value of thermal flux limited heat conduction can be evaluated from the relative intensity of iron lines.

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Electron temperature and density characterization using L-shell spectroscopy of laser irradiated buried iron layer targets

et al. 2014

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K-Shell Spectra from CH Foam Tamped Ti Layers Irradiated with Nanosecond Laser Pulses

Zhao¹,

Zhu²,

Wei³

et al. 2012

Chinese Phys. Lett.

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Hot dense titanium plasma was produced by irradiating a CH foam coated titanium layer with nanosecond laser pulses. The time-integrated emission spectra of He-like titanium were measured by using an absolutely calibrated flat crystal spectrometer. The synthetic spectra obtained by the steady collisional-radiative (CR) equilibrium model associated with the hydrodynamic simulations were compared with the experimental spectra. The results show that the electron density increases up to 5 × 1021 cm−3 with CH foam of density 40 mg/cc. This work indicates that an overlay of CH foam on a solid target is beneficial to create an optimum condition for K-shell emissions from a high density plasma region.

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K -Shell Spectra from CH-Tamped Aluminum Layers Irradiated with Intense Femtosecond Laser Pulses

Cited by 2 publications

References 29 publications

Electron temperature and density characterization using L-shell spectroscopy of laser irradiated buried iron layer targets

Electron temperature and density characterization using L-shell spectroscopy of laser irradiated buried iron layer targets

K-Shell Spectra from CH Foam Tamped Ti Layers Irradiated with Nanosecond Laser Pulses

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