Laser diagnostics provides powerful tools for the investigation of dense Z-pinches.In this paper,wire-array Z-pinches are investigated at the 1 MA Zebra generator using laser diagnostics at different wavelengths coupl...Laser diagnostics provides powerful tools for the investigation of dense Z-pinches.In this paper,wire-array Z-pinches are investigated at the 1 MA Zebra generator using laser diagnostics at different wavelengths coupled with x-ray diagnostics.Plasma dynamics during the ablation,implosion,and stagnation stages are observed by multiframe diagnostics.Cascading and nonprecursor implosions are studied in wire arrays.Ultraviolet diagnostics allows deep penetration into the Z-pinch plasma at stagnation.End-on probing reveals the complicated structure of the precursor.Strong magnetohydrodynamic instabilities are found in a dense pinch hidden in the trailing plasma.Small-scale instabilities are seen in the Z-pinch plasma with micrometer resolution.Probing of the pinch from four directions shows asymmetrical trailing plasma in some configurations of wire arrays.Faraday rotation diagnostics reveals the magnetic fields and the current distribution in the plasma of the precursor and Z-pinch.Redistribution of current in the trailing plasma is seen during kink and sausage instabilities in the stagnation stage.The formation of micropinches and hot spots in the Z-pinch is analyzed with coupled laser and x-ray diagnostics.Different laser diagnostics allow the study of Z-pinch plasmas in all stages,including fast dynamics and instabilities.展开更多
A number of laser facilities coming online all over the world promise the capability of high-power laser experiments with shot repetition rates between 1 and 10 Hz. Target availability and technical issues related to ...A number of laser facilities coming online all over the world promise the capability of high-power laser experiments with shot repetition rates between 1 and 10 Hz. Target availability and technical issues related to the interaction environment could become a bottleneck for the exploitation of such facilities. In this paper, we report on target needs for three different classes of experiments: dynamic compression physics, electron transport and isochoric heating, and laser-driven particle and radiation sources. We also review some of the most challenging issues in target fabrication and high repetition rate operation. Finally, we discuss current target supply strategies and future perspectives to establish a sustainable target provision infrastructure for advanced laser facilities.展开更多
文摘Laser diagnostics provides powerful tools for the investigation of dense Z-pinches.In this paper,wire-array Z-pinches are investigated at the 1 MA Zebra generator using laser diagnostics at different wavelengths coupled with x-ray diagnostics.Plasma dynamics during the ablation,implosion,and stagnation stages are observed by multiframe diagnostics.Cascading and nonprecursor implosions are studied in wire arrays.Ultraviolet diagnostics allows deep penetration into the Z-pinch plasma at stagnation.End-on probing reveals the complicated structure of the precursor.Strong magnetohydrodynamic instabilities are found in a dense pinch hidden in the trailing plasma.Small-scale instabilities are seen in the Z-pinch plasma with micrometer resolution.Probing of the pinch from four directions shows asymmetrical trailing plasma in some configurations of wire arrays.Faraday rotation diagnostics reveals the magnetic fields and the current distribution in the plasma of the precursor and Z-pinch.Redistribution of current in the trailing plasma is seen during kink and sausage instabilities in the stagnation stage.The formation of micropinches and hot spots in the Z-pinch is analyzed with coupled laser and x-ray diagnostics.Different laser diagnostics allow the study of Z-pinch plasmas in all stages,including fast dynamics and instabilities.
基金support from the European Cluster of Advanced Laser Light Sources(EUCALL)project which has received funding from the European Union’s Horizon 2020 research and innovation programme under agreement No 654220support of the ELI-NP team and from ELI-NP PhaseⅡ,a project co-financed by the Romanian Government and European Union through the European Regional Development Fund–the Competitiveness Operational Programme(1/07.07.2016,COP,ID 1334)+5 种基金support of the ELI-Beamlines project,mainly sponsored by the project ELI–Extreme Light Infrastructure–Phase 2(CZ.02.1.01/0.0/0.0/15–008/0000162)through the European Regional Development Fundsupport of Planet Dive,a project that has received funding from the European Research Council(ERC)under the European Union’s Horizon 2020 research and innovation programme(grant agreement N.637748)supported by the Helmholtz Association under VHNG-1141support of the European Research Council Consolidator Grant ENSURE(ERC-2014CoG No.647554)Support by the Nanofabrication Facilities Rossendorfthe Institute of Ion Beam Physics and Materials Research,HZDR
文摘A number of laser facilities coming online all over the world promise the capability of high-power laser experiments with shot repetition rates between 1 and 10 Hz. Target availability and technical issues related to the interaction environment could become a bottleneck for the exploitation of such facilities. In this paper, we report on target needs for three different classes of experiments: dynamic compression physics, electron transport and isochoric heating, and laser-driven particle and radiation sources. We also review some of the most challenging issues in target fabrication and high repetition rate operation. Finally, we discuss current target supply strategies and future perspectives to establish a sustainable target provision infrastructure for advanced laser facilities.
