Highly efficient conversion of laser energy to hard X-rays in high intensity laser-solid simulations

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dc.contributor.authorMorris, Stuart
dc.date.accessioned2024-05-04T16:04:45Z
dc.date.available2024-05-04T16:04:45Z
dc.date.issued2022-01-13T11:21:10Z
dc.description.abstractWe present simulations which predict significantly higher laser to X-ray efficiencies than those previously found in high intensity (1020-1022 Wcm-2) laser-solid simulations. The bremsstrahlung emission is shown to last for 10-100 ps, which is difficult to model with conventional particle-in-cell (PIC) codes. The importance of collective effects is also demonstrated, showing the limitations of Monte Carlo modelling in these systems. A new, open-source hybrid-PIC code with bremsstrahlung routines has been developed to model this X-ray production. Special boundary conditions are used to emulate complex electron refluxing behaviour, which has been characterised in 2D-PIC simulations. The peak X-ray efficiency was recorded in thick gold targets, with 7.4% conversion of laser energy into X-rays of energy 1 MeV or higher. The target size is shown to play a role in the conversion efficiency and angular distribution of emitted X-rays, and a simple analytic model is presented for estimating these efficiencies.
dc.description.sponsorshipAWE
dc.identifier.citationMorris, Stuart (2022). Highly efficient conversion of laser energy to hard X-rays in high intensity laser-solid simulations. Cranfield Online Research Data (CORD). Poster. https://doi.org/10.17862/cranfield.rd.18319181.v1
dc.identifier.doi10.17862/cranfield.rd.18319181.v1
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/21375
dc.publisherCranfield University
dc.rightsCC BY 4.0
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectDSDS21'
dc.subject'DSDS21 Poster'
dc.subject'X-ray'
dc.subject'Bremsstrahlung'
dc.subject'Petawatt'
dc.subject'Lasers and Quantum Electronics'
dc.titleHighly efficient conversion of laser energy to hard X-rays in high intensity laser-solid simulations
dc.typePoster

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