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P: Fachverband Plasmaphysik

P 10: Poster Session 2

P 10.30: Poster

Dienstag, 10. März 2020, 16:30–18:30, Empore Lichthof

Analytical models for the Trojan Horse regime of underdense photocathode plasma wakefield acceleration — •Johannes Thomas and Alexander Pukhov — Heinrich Heine Universität Düsseldorf

Broken plasma wake fields in homogeneous plasmas provide a feasible path for high- gradient particle acceleration. Especially efficient is the so-called blow-out regime of particle wake field acceleration[1], where a short, highly dense particle bunch excites a distorted spherical cavity from which all electrons are banished. The blow-out moves with nearly the speed of light through the plasma and generates quasi-mono-energetic electron bunches. In the context of underdense photocathode plasma wakefield acceleration (also known as the Trojan Horse regime) it could be shown that a laser-controlled release of electrons directly into a blow-out allows the generation of electron bunches with ultra-low emittance and ultra-high brightness [2]. In our presented work we show:

(i) why known (semi-)analytical blow-out models have difficulties to correctly describe the acceleration of single electrons in the quasi-static fields of the Trojan Horse regime;

(ii) how a quasi-static model for the special parameter range of the Trojan Horse regime can be formulated;

(iii) that tailored plasma channels can stabilize the injection mechanism.

[1] P. Chen et. al, Phys. Rev. Lett 54, 693 (1985).

[2] B. Hidding et. al, AIP Conference Proceedings 1507, 570 (2012).