Highly efficient, easily spectrally tunable X-ray backlighting for the study of extreme matter states

Loupias, B.; Pérez, F.; Benuzzi‐Mounaix, A.; Ozaki, Norimasa; Rabec, M.; Gloahec, L.E.; Pikuz, T. A.; Faenov, A. Ya.; Aglitskiy, Y.; Kœnig, M.

doi:10.1017/s0263034609990322

Cited by 16 publications

(10 citation statements)

References 44 publications

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“…These X-rays have several applications in various fields of science. These X-ray sources can be used as a probe for the study of high density phenomenon by using them as a back-lighter in extreme matter physics [1] which allows us to determine the opacity of materials [2]. Opacity plays a key role in radiation diffusion modeling of stars [3] and in inertial confinement fusion (ICF) for accurate modeling of radiative hydrodynamics.…”

Section: Introductionmentioning

confidence: 99%

K-shell X-ray spectroscopy of laser produced aluminum plasma

Kaur

Chaurasia

Poswal

et al. 2017

Journal of Quantitative Spectroscopy and Radiative Transfer

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Optimization of a laser produced plasma (LPP) X-ray source has been performed by analyzing K-shell emission spectra of Al plasma at a laser intensity of 10 13-10 14 W/cm 2. The effect of varying the laser intensity on the emissivity of the K-shell resonance lines is studied and found to follow a power law, E α I α with α=2.2, 2.3, 2.4 for He β , He γ , He δ respectively. The emission of these resonance lines has been found to be heavily anisotropic. A Python language based code has been developed to generate an intensity profile of K-shell spectral lines from the raw data. In theoretical calculations, the temperature is estimated by taking the ratio of the Li-like satellite (1s 2 2p-1s2p3p) and the He β (1s 2-1s3p) resonance line and the ratio of the He-like satellite (1s2p-2p 2) and the Ly α (1s-2p) resonance line. To determine the plasma density, stark broadening of the Ly β spectral line is used. Simulation was carried out using the FLYCHK code to generate a synthetic emission spectrum. The results obtained by FLYCHK are T e =160 eV, T h =1 keV, f=0.008, n e =5 x 10 20 cm-3 and the analytical model resulted T e =260-419 eV and n e =3x10 20 cm-3 .

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Section: Introductionmentioning

confidence: 99%

K-shell X-ray spectroscopy of laser produced aluminum plasma

Kaur

Chaurasia

Poswal

et al. 2017

Journal of Quantitative Spectroscopy and Radiative Transfer

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“…The production of small, compact, easily accessible and short pulse length X-ray sources from laser plasma interactions has significantly facilitated research in advanced science such as radiobiology, X-ray microscopy, micro-lithography, astrophysical and fusion applications, measurement of the opacity of materials, X-ray driven shock studies for Equation-of-State (EOS) measurements of materials under extreme conditions and time resolved x-ray diffraction of materials (Loupias et al, 2009;Rossall et al, 2010;Daido et al, 2002;Keiter et al, 2008;Lewis et al, 1984;Chaker et al,1988;Förstera et al, 1989;O'Neill et al, 1989;Lindl et al, 1995; . Rischel et al, 1997;Borisenko et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

X-ray and ion emission studies from subnanosecond laser-irradiated SiO₂ aerogel foam targets

et al. 2017

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Low density foam of high Z to low Z materials are increasingly being used as target materials in laser produced bright X-ray sources and in laser shock physics experiments 2 respectively. In this experiment, a comparative study of ion and X-ray emission from both a SiO 2 foam and a quartz target is performed. The experiment is performed using Nd: Glass laser system operated at laser energy upto 15 J with a pulse duration of 500 ps with focussable intensity of 10 13 -10 14 W/cm 2 on target is used for these studies. X-ray fluxes in different spectral ranges (soft and hard) are measured by using X-ray diodes covered with Al filters of thickness 5 μm (0.9 -1.56 keV) and 20 μm (3.4 -16 keV). A 2.5 times enhancement in soft X-ray flux (0.9 -1.56 keV) and a decrease of 1.8 times in hard X-rays (3.4 -16 keV) for 50 mg/cc SiO 2 foam is observed compared to the solid quartz. A decrease in the flux of the K-shell line emission spectrum of soft X-rays is noticed in the case of the foam targets. The high resolution K-shell spectra (He-like) of Si ions in both the cases are analyzed for the determination of plasma parameters by comparing with FLYCHK simulations. The estimated plasma temperature and density are T c = 180 eV, n e = 7 x 10 20 cm -3 and T c = 190 eV, n e = 4 x 10 20 cm -3 for quartz and SiO 2 foam respectively. To measure the evolution of the plasma moving away from the targets, four identical ion collectors are placed at different angles (22.5°, 30°, 45° and 67.5°) from target normal. The angular distribution of the thermal ions are scaled as cos n θ with respect to target normal, where n = 3.8 and 4.8 for the foam and quartz respectively. The experimental plasma volume measured from the ion collectors and shadowgraphy images are verified by a 2D Eulerian radiativehydrodynamic simulation (POLLUX code).

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“…11 It was, however, clearly pointed out by Labate et al 12 that a nearly monochromatic beam with a bandwidth of several mÅ, propagating in the meridional direction, can only be obtained if the source is placed on the Rowland circle. While in some applications, 11 the X-ray source needs to be inside the Rowland circle to collect more photons, with the cost of smaller imaged area on the object.…”

Section: Introductionmentioning

confidence: 99%

Transverse coupling property of beam from ECR ion sources

Yang

Yuan

Sun

et al. 2014

Review of Scientific Instruments

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Experimental evidence of the property of transverse coupling of beam from Electron Cyclotron Resonance (ECR) ion source is presented. It is especially of interest for an ECR ion source, where the cross section of extracted beam is not round along transport path due to the magnetic confinement configuration. When the ions are extracted and accelerated through the descending axial magnetic field at the extraction region, the horizontal and vertical phase space strongly coupled. In this study, the coupling configuration between the transverse phase spaces of the beam from ECR ion source is achieved by beam back-tracking simulation based on the measurements. The reasonability of this coupling configuration has been proven by a series of subsequent simulations.

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Highly efficient, easily spectrally tunable X-ray backlighting for the study of extreme matter states

Cited by 16 publications

References 44 publications

K-shell X-ray spectroscopy of laser produced aluminum plasma

K-shell X-ray spectroscopy of laser produced aluminum plasma

X-ray and ion emission studies from subnanosecond laser-irradiated SiO₂ aerogel foam targets

Transverse coupling property of beam from ECR ion sources

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Highly efficient, easily spectrally tunable X-ray backlighting for the study of extreme matter states

Cited by 16 publications

References 44 publications

K-shell X-ray spectroscopy of laser produced aluminum plasma

K-shell X-ray spectroscopy of laser produced aluminum plasma

X-ray and ion emission studies from subnanosecond laser-irradiated SiO2 aerogel foam targets

Transverse coupling property of beam from ECR ion sources

Contact Info

Product

Resources

About

X-ray and ion emission studies from subnanosecond laser-irradiated SiO₂ aerogel foam targets