Ultrafast Imaging of Laser Driven Shock Waves using Betatron X-rays from a Laser Wakefield Accelerator
| Autor: | J. S. J. Bryant, Alexander Thomas, Nicola Booth, S. H. Glenzer, Peta Foster, K. Krushelnick, J. C. Wood, K. Behm, Z. Zhao, William Schumaker, E.G. Hill, Zulfikar Najmudin, Mark Sherlock, Stuart Mangles, Michael E. Rutherford, Felicie Albert, B. B. Pollock, S. J. Rose, David J. Chapman, Thomas G. White, Kristjan Poder, Robbie Scott, Nelson Lopes, Daniel E. Eakins |
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| Přispěvatelé: | AWE Plc |
| Rok vydání: | 2018 |
| Předmět: |
Shock wave
REGIME FOS: Physical sciences lcsh:Medicine ELECTRON-BEAMS 01 natural sciences Article 010305 fluids & plasmas law.invention Optics law physics.plasm-ph 0103 physical sciences SILICON lcsh:Science 010306 general physics Physics Science & Technology Multidisciplinary PLASMA business.industry lcsh:R Velocimetry Laser Plasma acceleration Betatron Physics - Plasma Physics Synchrotron Plasma Physics (physics.plasm-ph) Multidisciplinary Sciences Temporal resolution PHASE-TRANSITION Science & Technology - Other Topics Physics::Accelerator Physics lcsh:Q business Ultrashort pulse |
| Zdroj: | Scientific Reports Scientific Reports, Vol 8, Iss 1, Pp 1-10 (2018) |
| ISSN: | 2045-2322 |
| Popis: | Betatron radiation from laser wakefield accelerators is an ultrashort pulsed source of hard, synchrotron-like x-ray radiation. It emanates from a centimetre scale plasma accelerator producing GeV level electron beams. In recent years betatron radiation has been developed as a unique source capable of producing high resolution x-ray images in compact geometries. However, until now, the short pulse nature of this radiation has not been exploited. This report details the first experiment to utilise betatron radiation to image a rapidly evolving phenomenon by using it to radiograph a laser driven shock wave in a silicon target. The spatial resolution of the image is comparable to what has been achieved in similar experiments at conventional synchrotron light sources. The intrinsic temporal resolution of betatron radiation is below 100 fs, indicating that significantly faster processes could be probed in future without compromising spatial resolution. Quantitative measurements of the shock velocity and material density were made from the radiographs recorded during shock compression and were consistent with the established shock response of silicon, as determined with traditional velocimetry approaches. This suggests that future compact betatron imaging beamlines could be useful in the imaging and diagnosis of high-energy-density physics experiments. 11 pages, 7 figures |
| Databáze: | OpenAIRE |
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