X-ray generation by laser hole boring and channelling in dense plasma

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Wilson, R. and Gonzalez Izquierdo, B. and Duff, M.J. and Armstrong, C. and Gray, R.J. and King, M. and Brabetz, C. and Zielbauer, B. and Bagnoud, V. and Neely, D. and McKenna, P.; (2018) X-ray generation by laser hole boring and channelling in dense plasma. In: GSI-FAIR Scientific Report 2017. GSI Helmholtzzentrum fur Schwerionenforschung GmbH, Darmstadt, Germany, p. 225. (https://doi.org/10.15120/GSI-2017-01856)

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Abstract

We report on an experiment which aimed to investigate the sensitivity of X-ray radiation generation to the degree of laser channelling occurring in overdense plasma. Channelling is driven by the processes of relativistic self induced transparency (RSIT) [1] and radiation pressure hole boring (HB) [2] and enables the laser to interact with the target plasma volumetrically. X-rays are produced by electron acceleration in the fields generated, or via Bremsstrahlung due to interaction with the fields of the target atoms, and provide a useful diagnostic due to their penetration through the dense target, enabling the channelling dynamics to be probed. Investigation of laser hole-boring and channelling physics in dense plasma at the upper limits of intensities achievable today (~1021 Wcm-2) benchmarks models used to design future experiments at multi-petawatt lasers, for which radiation pressure driven effects will dominate the physics.

ORCID iDs

Wilson, R., Gonzalez Izquierdo, B., Duff, M.J. ORCID logoORCID: https://orcid.org/0000-0002-0745-0157, Armstrong, C. ORCID logoORCID: https://orcid.org/0000-0003-2083-8487, Gray, R.J. ORCID logoORCID: https://orcid.org/0000-0003-0610-9595, King, M. ORCID logoORCID: https://orcid.org/0000-0003-3370-6141, Brabetz, C., Zielbauer, B., Bagnoud, V., Neely, D. and McKenna, P. ORCID logoORCID: https://orcid.org/0000-0001-8061-7091;
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