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Article Dans Une Revue Journal of Plasma Physics Année : 2023

Beam current from downramp injection in electron-driven plasma wakefields

Céline Hue
Anton Golovanov
Sheroy Tata
  • Fonction : Auteur
Sébastien Corde
Victor Malka

Résumé

We study the stability of plasma wake wave and the properties of density-downramp injection in an electron-driven plasma accelerator. In this accelerator type, a short high-current electron bunch (generated by a conventional accelerator or a laser-wakefield acceleration stage) drives a strongly nonlinear plasma wake wave (blowout), and accelerated electrons are injected into it using a sharp density transition which leads to the elongation of the wake. The accelerating structure remains highly stable until the moment some electrons of the driver reach almost zero energy, which corresponds to the best interaction length for optimal driver-to-plasma energy transfer efficiency. For a particular driver, this efficiency can be optimised by choosing appropriate plasma density. Studying the dependence of the current of the injected bunch on driver and plasma parameters, we show that it does not depend on the density downramp length as long as the condition for trapping is satisfied. Most importantly, we find that the current of the injected bunch primarily depends on just one parameter which combines both the properties of the driver (its current and duration) and the plasma density.
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Origine : Publication financée par une institution

Dates et versions

hal-04390348 , version 1 (12-01-2024)

Identifiants

Citer

Céline Hue, Anton Golovanov, Sheroy Tata, Sébastien Corde, Victor Malka. Beam current from downramp injection in electron-driven plasma wakefields. Journal of Plasma Physics, 2023, 89 (5), pp.965890502. ⟨10.1017/s0022377823001162⟩. ⟨hal-04390348⟩
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