Shaped liquid drops generate MeV temperature electron beams with millijoule class laser

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Mondal, Angana and Sabui, Ratul and Tata, Sheroy and Trines, R. M. G. M. and Rahul, S. V. and Li, Feiyu and Sarkar, Soubhik and Trickey, William and Kumar, Rakesh Y. and Rajak, Debobrata and Pasley, John and Sheng, Zhengming and Jha, Jagannath and Anand, M. and Gopal, Ram and Robinson, A. P. L. and Krishnamurthy, M. (2024) Shaped liquid drops generate MeV temperature electron beams with millijoule class laser. Communications Physics, 7 (1). 85. ISSN 2399-3650 (https://doi.org/10.1038/s42005-024-01550-8)

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Abstract

MeV temperature electrons are typically generated at laser intensities of 1018 W cm−2. Their generation at non-relativistic intensities (~1016 W cm−2) with high repetition rate lasers is cardinal for the realization of compact, ultra-fast electron sources. Here we report a technique of dynamic target structuring of micro-droplets using a 1 kHz, 25 fs, millijoule class laser, that uses two collinear laser pulses; the first to create a concave surface in the liquid drop and the second, to dynamically-drive electrostatic plasma waves that accelerate electrons to MeV energies. The acceleration mechanism, identified as two plasmon decay instability, is shown to generate two beams of electrons with hot electron temperature components of 200 keV and 1 MeV, respectively, at an intensity of 4 × 1016 Wcm−2, only. The electron beams are demonstrated to be ideal for single shot high resolution (tens of μm) electron radiography.

ORCID iDs

Mondal, Angana, Sabui, Ratul, Tata, Sheroy, Trines, R. M. G. M., Rahul, S. V., Li, Feiyu, Sarkar, Soubhik, Trickey, William, Kumar, Rakesh Y., Rajak, Debobrata, Pasley, John, Sheng, Zhengming ORCID logoORCID: https://orcid.org/0000-0002-8823-9993, Jha, Jagannath, Anand, M., Gopal, Ram, Robinson, A. P. L. and Krishnamurthy, M.;
  • Item type:Article
    ID code:89053
    Dates:
    Date
    Event
    7 March 2024
    Published
    6 February 2024
    Accepted
    26 October 2022
    Submitted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:30 Apr 2024 14:51
    Last modified:11 Nov 2024 14:17
    URI:https://strathprints.strath.ac.uk/id/eprint/89053
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