Advances in plasma-based beam dump modelling

Abstract

This work presents a short review on the advances of plasma beam dump modelling since they have been first proposed. Analytical models have been derived to estimate the beam energy loss for both passive and active beam dump schemes. For the passive case in particular, tailored plasma density profiles can improve beam-energy extraction by mitigating particle re-acceleration. A semi-analytical model, consisting of the dynamics of test-particles experiencing the previously derived analytical wakefields, is under development to investigate deceleration beyond the saturation point, in the linear to the quasi-linear regime.

Multi-layer structure formation of relativistic electron beams in plasmas

“…With continuous progress in high power laser technology, multi-GeV energy gain of electrons is achievable over a short distance in the experiments [9]. Meanwhile, a safety design of the beam dump [13][14][15][16] is urgently acquired to decelerate particles into a safe energy region without radiation. Thus, based on the collective electromagnetic field of short particle bunches in the plasma, plasma-based beam dump has recently received tremendous interest to develop safer and greener facilities.…”

“…Many simulations and analytical works [13][14][15][16][17][18] have been carried out to investigate plasma-based beam dump. The strong collective stopping of few-fs electron beams inside mm-scale underdense plasma was firstly demonstrated in two independent experiments [19].…”

“…The strong collective stopping of few-fs electron beams inside mm-scale underdense plasma was firstly demonstrated in two independent experiments [19]. It is shown that the plasma beam dump can be the most straightforward application for absorbing the kinetic energy of the EuPRAXIA beam over short distance [13][14][15][16]. Generally, two types of plasma beam dump (passive beam dump and active beam dump) are considered.…”