Measurement of high-dynamic range x-ray Thomson scattering spectra for the characterization of nano-plasmas at LCLS
| Autor: | R. P. Drake, C. P. O’Grady, Timur Osipov, Dominik Kraus, Ken R. Ferguson, Abraham Levitan, Thomas Fennel, Sebastian Carron, Siegfried Glenzer, Ryan Coffee, B. Bachmann, M. Swiggers, Stefan P. Hau-Riege, Christian Peltz, Karl-Heinz Meiwes-Broer, S. Skruszewicz, Christoph Bostedt, Tais Gorkhover, Tilo Döppner, Luke Fletcher, E. J. Gamboa, Michael MacDonald, T. Pardini, Maximilian Bucher, Sebastian Göde, Jacek Krzywinski |
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| Rok vydání: | 2016 |
| Předmět: |
Physics
Scattering Thomson scattering business.industry Physics::Optics Laser pumping Laser 01 natural sciences 010305 fluids & plasmas law.invention Optics Orders of magnitude (time) law Ionization 0103 physical sciences Femtosecond Atomic physics 010306 general physics business Instrumentation Ultrashort pulse |
| Zdroj: | The Review of scientific instruments. 87(11) |
| ISSN: | 1089-7623 |
| Popis: | Atomic clusters can serve as ideal model systems for exploring ultrafast (∼100 fs) laser-driven ionization dynamics of dense matter on the nanometer scale. Resonant absorption of optical laser pulses enables heating to temperatures on the order of 1 keV at near solid density conditions. To date, direct probing of transient states of such nano-plasmas was limited to coherent x-ray imaging. Here we present the first measurement of spectrally resolved incoherent x-ray scattering from clusters, enabling measurements of transient temperature, densities, and ionization. Single shot x-ray Thomson scattering signals were recorded at 120 Hz using a crystal spectrometer in combination with a single-photon counting and energy-dispersive pnCCD. A precise pump laser collimation scheme enabled recording near background-free scattering spectra from Ar clusters with an unprecedented dynamic range of more than 3 orders of magnitude. Such measurements are important for understanding collective effects in laser-matter interactions on femtosecond time scales, opening new routes for the development of schemes for their ultrafast control. |
| Databáze: | OpenAIRE |
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