Mondal, Angana, Sabui, Ratul, Tata, Sheroy et al. (14 more authors) (2021) Laser structured micro-targets generate MeV electron temperature at 4 x10^16 W/cm^2. Working Paper. arXiv .
Abstract
Relativistic temperature electrons higher than 0.5 MeV are generated typically with laser intensities of about 10^18 W/cm^2. Their generation with high repetition rate lasers that operate at non-relativistic intensities (~10^16W/cm^2) is cardinal for the realization of compact, ultra-short, bench-top electron sources. New strategies, capable of exploiting different aspects of laser-plasma interaction, are necessary for reducing the required intensity. We report here, a novel technique of dynamic target structuring of microdroplets, capable of generating 200 keV and 1 MeV electron temperatures at 1/100th of the intensity required by ponderomotive scaling(10^18 W/cm^2) to generate relativistic electron temperature. Combining the concepts of pre-plasma tailoring, optimized scale length and micro-optics, this method achieves two-plasmon decay boosted electron acceleration with "non-ideal" ultrashort (25 fs) pulses at 4 x10^16 W/cm^2 only. With shot repeatability at kHz, this precise in-situ targetry produces directed, imaging quality beam-like electron emission up to 6 MeV with milli-joule class lasers, that can be transformational for time-resolved, microscopic studies in all fields of science.
Metadata
Item Type: | Monograph |
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Authors/Creators: |
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Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Depositing User: | Pure (York) |
Date Deposited: | 15 Jul 2021 08:40 |
Last Modified: | 28 Nov 2024 00:08 |
Status: | Published |
Series Name: | arXiv |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:176224 |