Publications (4)13.11 Total impact

Article: A multidimensional theory for electron trapping by a plasma wake generated in the bubble regime
[Show abstract] [Hide abstract]
ABSTRACT: We present a theory for electron selfinjection in nonlinear, multidimensional plasma waves excited by a short laser pulse in the bubble regime or by a short electron beam in the blowout regime. In these regimes, which are typical for electron acceleration in the last impressive experiments, the laser radiation pressure or the electron beam charge pushes out plasma electrons from some region, forming a plasma cavity or a bubble with a huge ion charge. The plasma electrons can be trapped in the bubble and accelerated by the plasma wakefields up to a very high energy. We derive the condition of the electron trapping in the bubble. The developed theory predicts the trapping cross section in terms of the bubble radius and the bubble velocity. It is found that the dynamic bubble deformations observed in the threedimensional (3D) particleincell (PIC) simulations influence the trapping process significantly. The bubble elongation reduces the gammafactor of the bubble, thereby strongly enhancing selfinjection. The obtained analytical results are in good agreement with the 3D PIC simulations.  [Show abstract] [Hide abstract]
ABSTRACT: We present a simple model (piecewise model) for electron selfinjection in nonlinear, multidimensional plasma waves excited by short laser pulse in the bubble regime. In this model fields are assumed to be constant in quarters that yields an extra integral of the electron motion and allows us to obtain analytical expressions for the electron trajectories. In the framework of this model we derive the condition of the electron trapping in the bubble. The developed theory predicts the trapping cross section in terms of the bubble radius and the bubble velocity and reveals key features of electron trapping in threedimensional regime.  [Show abstract] [Hide abstract]
ABSTRACT: We present an analytical model for electron selfinjection in a nonlinear, multidimensional plasma wave excited by a short laser pulse in the bubble regime or by a short electron beam in the blowout regime. In these regimes, which are typical for electron acceleration, the laser radiation pressure or the electron beam charge pushes out background plasma electrons forming a plasma cavitybubblewith a huge ion charge. The plasma electrons can be trapped in the bubble and accelerated by the plasma wakefields up to very high energies. The model predicts the condition for electron trapping and the trapping cross section in terms of the bubble radius and the bubble velocity. The obtained results are in a good agreement with results of 3D particleincell simulations.  [Show abstract] [Hide abstract]
ABSTRACT: Using ParticleinCell simulations as well as analytical theory we study electron acceleration in underdense plasmas both in the Bubble regime and in the weakly relativistic periodic wake fields. In the Bubble regime, electron trapping is taken as a function of the propagated distance. The number of trapped electrons depends on the effective phase velocity of the Xpoint at the rear of the Bubble. For the weakly relativistic periodic wakes, we show that the phase synchronism between the wake and the relativistic electrons can be maintained over very long distances when the plasma density is tapered properly. Moreover, one can use layered plasmas to control and improve the accelerated beam quality. To cite this article: A. Pukhov et al., C. R. Physique 10 (2009).
Publication Stats
64  Citations  
13.11  Total Impact Points  
Top Journals
Institutions

20092010

HeinrichHeineUniversität Düsseldorf
 Institute for Theoretical Physics I.
Düsseldorf, North RhineWestphalia, Germany
