Weak collisionless shocks in laser-plasmas
Plasma Physics and Controlled Fusion IOP Publishing 57:4 (2015) 044008
Observation of finite-wavelength screening in high-energy-density matter.
Nature communications 6 (2015) 6839
Abstract:
A key component for the description of charged particle systems is the screening of the Coulomb interaction between charge carriers. First investigated in the 1920s by Debye and Hückel for electrolytes, charge screening is important for determining the structural and transport properties of matter as diverse as astrophysical and laboratory plasmas, nuclear matter such as quark-gluon plasmas, electrons in solids, planetary cores and charged macromolecules. For systems with negligible dynamics, screening is still mostly described using a Debye-Hückel-type approach. Here, we report the novel observation of a significant departure from the Debye-Hückel-type model in high-energy-density matter by probing laser-driven, shock-compressed plastic with high-energy X-rays. We use spectrally resolved X-ray scattering in a geometry that enables direct investigation of the screening cloud, and demonstrate that the observed elastic scattering amplitude is only well described within a more general approach.Ultrabright X-ray laser scattering for dynamic warm dense matter physics
Nature Photonics Springer Nature 9:4 (2015) 274-279
Simulation of density measurements in plasma wakefields using photon acceleration
Physical Review Accelerators and Beams American Physical Society (APS) 18:3 (2015) 032801