Volume 51, Number 4, July-August 2020
|Page(s)||14 - 17|
|Published online||30 September 2020|
Luxe: combining high energy and intensity to spark the vacuum
DESY and Albert-Ludwigs-Universita¨t Freiburg
2 University of Plymouth, UK
The vacuum of quantum electrodynamics (QED) can be viewed as a medium akin to a dielectric which can be polarised by external fields. If these are sufficiently strong, the response of the vacuum becomes nonlinear and involves phenomena such as lightby- light scattering (‘nonlinear optics’) and, in extremis, ‘dielectric breakdown’, i.e. real pair production, if a critical field strength is exceeded. The LUXE experiment aims to realise near-critical fields through collisions of photons stemming from an ultra-intense optical laser with high energy electrons or photons provided by the European XFEL linear accelerator. This set-up provides a golden opportunity to enter the uncharted territory of strong-field quantum electrodynamics in the non-perturbative regime.
© European Physical Society, EDP Sciences, 2020
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