Validation of modelled imaging plates sensitivity to 1-100 keV x-rays and spatial resolution characterisation for diagnostics for the “PETawatt Aquitaine Laser”

Boutoux, G.; Batani, D.; Burgy, F.; Ducret, J. E.; Forestier-Colleoni, P.; Hulin, S.; Rabhi, N.; Duval, Alain; Lecherbourg, L.; Reverdin, C.; Jakubowska, K.; Szabo, Csilla I.; Bastiani-Ceccotti, S.; Consoli, F.; Curcio, A.; Angelis, R. De; Ingenito, F.; Baggio, J.; Raffestin, D.

doi:10.1063/1.4944863

Cited by 43 publications

(29 citation statements)

References 24 publications

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“…The two carbon mirrors stop XUV radiations with energies above 200 eV, enabling to perform XUV measurements unperturbed by second order or higher order diffraction from the grating. TR Image Plates are sensitive in both these spectral ranges because they are not protected [33][34][35]. Two other spectrometers measure the un-attenuated backlighter emission spectra, referred to as the "I 0 " measurement.…”

Section: Experimental Set Up and Data Processingmentioning

confidence: 99%

Simultaneous X-ray and XUV absorption measurements in nickel laser-produced plasma close to LTE

Dozières

Thais

Bastiani-Ceccotti

et al. 2019

High Energy Density Physics

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We present an experiment performed in 2016 at the LULI2000 laser facility in which X-ray and XUV absorption structures of nickel hot plasmas were measured simultaneously. Such experiments may provide stringent tests of the accuracy of plasma atomic-physics codes used to the modeling of plasmas close to local thermodynamic equilibrium. The experimental setup relies on a symmetric heating of the sample foil by two gold hohlraums in order to reduce the spatial gradients. The plasma conditions are characterized by temperatures between 10 and 20 eV and densities of the order of 10 −3 g/cm 3-10 −2 g/cm 3. For the X-ray part, we investigate the 2p-3d and 2p-4d transitions, and for the XUV part, we recorded the Δn = 0 (n = 3) transitions, which present a high sensitivity to plasma temperature. These latter transitions are of particular interest because, in mid-Z plasmas, they dominate the Planck and Rosseland mean opacities. Measured spectra are compared to calculations performed using the hybrid opacity code SCO-RCG and the Flexible Atomic Code (FAC). The influence of a spectator electron on the calculated spectra is analyzed using the latter code.

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Section: Experimental Set Up and Data Processingmentioning

confidence: 99%

Simultaneous X-ray and XUV absorption measurements in nickel laser-produced plasma close to LTE

Dozières

Thais

Bastiani-Ceccotti

et al. 2019

High Energy Density Physics

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“…This was coated with a layer of parylene-N to prevent plasma filling the pinhole and absorbing the X-rays. An image, with a magnification of 10.8, was formed on an image plate (BAS-TR FUJIFILM [37] -characterised in [38,39]) 228.6 mm from the gas cell. The image plate was filtered with two layers of 12.5 µm Ti filters for Sc XRBL targets.…”

Section: Diagnostic Set-upmentioning

confidence: 99%

Counter-propagating radiative shock experiments on the Orion laser and the formation of radiative precursors

Clayson

Suzuki-Vidal

Лебедев

et al. 2017

High Energy Density Physics

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We present results from new experiments to study the dynamics of radiative shocks, reverse shocks and radiative precursors. Laser ablation of a solid piston by the Orion high-power laser at AWE Aldermaston UK was used to drive radiative shocks into a gas cell initially pressurised between 0.1 and 1.0 bar with different noble gases. Shocks propagated at 80 ± 10 km/s and experienced strong radiative cooling resulting in post-shock compressions of ×25 ± 2. A combination of X-ray backlighting, optical self-emission streak imaging and interferometry (multi-frame and streak imaging) were used to simultaneously study both the shock front and the radiative precursor. These experiments present a new configuration to produce counter-propagating radiative shocks, allowing for the study of reverse shocks and providing a unique platform for numerical validation. In addition, the radiative shocks were able to expand freely into a large gas volume without being confined by the walls of the gas cell. This allows for 3-D effects of the shocks to be studied which, in principle, could lead to a more direct comparison to astrophysical phenomena. By maintaining a constant mass density between different gas fills the shocks evolved with similar hydrodynamics but the radiative precursor was found to extend significantly further in higher atomic number gases (∼4 times further in xenon than neon). Finally, 1-D and 2-D radiative-hydrodynamic simulations are presented showing good agreement with the experimental data

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“…Imaging plates were scanned at 25 µm nominal resolution with a calibrated General Electrics Typhoon FLA7000 scanner. The true resolving power is expected somewhat worse than that [226,227]. We found realistic resolutions of 50-100 µm in edge-measurements with straight metallic edges (boundaries defined with better than 30 µm) mounted directly on top of the IP detector.…”

Section: Source Characterizationmentioning

confidence: 73%

Relativistically Intense Laser–Microplasma Interactions

Ostermayr

2019

Springer Theses

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Diese Arbeit behandelt verschiedene Aspekte der Interaktion von relativistisch intensiven Laserpulsen mit Mikroplasmen. Dafür wurde zunächst eine Paul-Falle entwickelt, welche vollständig isolierte und definierte Mikrokugeln als Ziel für Experimente mit fokussierten Peta-Watt Laser-Pulsen bereitstellt. Solche Interaktionen wurden dann in der Theorie, in numerischen Simulationen und in einer Serie von Experimenten untersucht. Die erste wichtige Beobachtung hierbei war die Erzeugung manipulierbarer Protonenstrahlen mit kinetischen Energienüber 10 MeV. Die Modifikation in den spektralen und räumlichen Verteilungen erfolgte durch die Variation des Beschleunigungsmechanismus. Dies beinhaltet das Auftreten von Protonenstrahlen mit begrenzter spektraler Bandbreite, welcheähnliche Lasergetriebene Quellen in kinetischer Energie und/oder Teilchenfluenzübertreffen. Die relative Bandbreite von 20-25% wird durch die (isotrope) Coulomb Explosion oder durch gerichtete Beschleunigungsprozesse erreicht (Abb. 1a, sec. 5.3 und 5.4). Im zweiten Teil der Ar-Abbildung 1 | Zentrale Ergebnisse. a. Ionenquellen mit limitierter spektraler Bandbreite in dieser Arbeit (rot) im Kontext früherer Experimente mit Laser-Ionen-Beschleunigern (Quellen: [1-10]). Markiert ist je das spektrale Maximum, Fehlerbalken markieren die spektrale Breite (volle Breite bei halbem Maximalwert). b. Beispiel eines bimodalen Röntgen-und Protonenbildes (übereinander registriert). Der Skalenbalken entspricht 1 cm. Intensitäten sind in relativen Skalen angegeben und das Protonenbild wird zu 40% transparent dargestellt. beit wurden Mikronadeln mit Peta-Watt Laser-Pulsen beschossen um Röntgen-und Protonenstrahlen mit jeweils nur einigen Mikrometern effektiver Quellgröße zu erzeugen. Im Röntgenspektrum wurde ein Maximum um 6 keV und messbares Signal bisüber 10 keV beobachtet. Das Protonenspektrum zeigte erneut die quasi-monoenergetische Verteilung mit Peak-Energienüber 10 MeV (Abb. 1a, sec. 6.1). Nach der Charakterisierung der Quelle wurde diese für Bildgebung genutzt. Dabei konnte insbesondere die gleichzeitige Aufnahme von Röntgen-und Protonenbildern mit einem einzelnen Laserschuß gezeigt werden (Abb. 1b). Die Besonderheiten der Quelle erlaubten zudem Röntgenaufnahmen mit starkem Phasen-Kontrast Anteil, sowie die Untersuchung von quantitativen Einzelschuß Protonen-Radiographien.

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Validation of modelled imaging plates sensitivity to 1-100 keV x-rays and spatial resolution characterisation for diagnostics for the “PETawatt Aquitaine Laser”

Cited by 43 publications

References 24 publications

Simultaneous X-ray and XUV absorption measurements in nickel laser-produced plasma close to LTE

Simultaneous X-ray and XUV absorption measurements in nickel laser-produced plasma close to LTE

Counter-propagating radiative shock experiments on the Orion laser and the formation of radiative precursors

Relativistically Intense Laser–Microplasma Interactions

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