A Novel Technique for Producing Positron Beams Using Laser-Plasma Accelerators – Physical Sciences Area

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Schematic showing an electron beam (coming from the left, in blue) hits a thick tungsten target, and e+e- pairs are generated via bremsstrahlung. A laser pulse (coming from the top) impinges on the back surface of the target and is reflected by a plasma mirror to the right, where it excites a plasma wave. Positrons exiting the target (in green) are trapped and accelerated in the wake. (Credit: Davide Terzani/Berkeley Lab)

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