High Energy Physics - Phenomenology
[Submitted on 2 May 2016 (v1), last revised 21 Mar 2017 (this version, v2)]
Title:Depletion of intense fields
View PDFAbstract:The interaction of charged particles and photons with intense electromagnetic fields gives rise to multi-photon Compton and Breit-Wheeler processes. These are usually described in the framework of the external field approximation, where the electromagnetic field is assumed to have infinite energy. However, the multi-photon nature of these processes implies the absorption of a significant number of photons, which scales as the external field amplitude cubed. As a result, the interaction of a highly charged electron bunch with an intense laser pulse can lead to significant depletion of the laser pulse energy, thus rendering the external field approximation invalid. We provide relevant estimates for this depletion and find it to become important in the interaction between fields of amplitude $a_0 \sim 10^3$ and electron bunches with charges of the order of 10 nC.
Submission history
From: Daniel Seipt [view email][v1] Mon, 2 May 2016 19:31:27 UTC (570 KB)
[v2] Tue, 21 Mar 2017 14:49:31 UTC (192 KB)
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