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X-ray photons produced from a plasma-cathode electron beam for radiation biology applications

Abstract : A compact low-energy and high-intensity x-ray source for radiation biology applications is presented. A laser-induced plasma moves inside a 30 kV diode and produces a beam of 1014 electrons at the anode location. An aluminum foil converts a part of the energy of these electrons into x-ray photons, which are characterized using filtered imaging plates. The dose that would be deposited by these x-ray photons in C. elegans larvae is calculated from Geant4 simulations. It can be set to a value ranging between 10 μGy and 10 mGy per laser shot by simply changing the aluminum foil thickness and the diode voltage. Therefore, this versatile and compact x-ray source opens a new path to explore the radiation effects induced by dose rates varying over several orders of magnitude.
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https://hal.archives-ouvertes.fr/hal-03124745
Contributor : Franck Gobet <>
Submitted on : Friday, January 29, 2021 - 5:59:33 AM
Last modification on : Monday, February 15, 2021 - 8:52:02 AM

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F. Gobet, P. Barberet, L. Courtois, G. Deves, J. Gardelle, et al.. X-ray photons produced from a plasma-cathode electron beam for radiation biology applications. Applied Physics Letters, American Institute of Physics, 2021, 118 (4), pp.044102. ⟨10.1063/5.0036284⟩. ⟨hal-03124745⟩

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