Gas-dynamic density downramp injection in a beam-driven plasma wakefield accelerator
Gas-dynamic density downramp injection in a beam-driven plasma wakefield accelerator
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DOI：
10.1103/physrevresearch.3.l042005
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发表时间：
2021-10-15
影响因子：
4.2
通讯作者：
Irman, A.
中科院分区：
文献类型：
--
作者：
Cabadag, J. P. Couperus;Pausch, R.;Irman, A.
我们展示了束驱动等离子体加速器中气体动力冲击下的密度下降注入的实验演示。峰值电流超过 10 kA 的超短驱动电子束允许在井喷状态下运行，并能够以温和的密度斜坡（即比等离子体波长更长）注入电子见证束团，这为超低束团发射度带来了前景。通过精确控制注射位置，我们表明这些束可以在接近 120 GV m(-1) 的加速度梯度下进行能量调谐。
We present the experimental demonstration of density downramp injection at a gas-dynamic shock in a beamdriven plasma accelerator. The ultrashort driver electron beam with a peak-current exceeding 10 kA allows operation in the blowout regime and enables injection of electron witness bunches at gentle density ramps, i.e., longer than the plasma wavelength, which nurtures prospects for ultralow bunch emittance. By precision control over the position of injection we show that these bunches can be energy-tuned in acceleration gradients of near 120 GV m(-1).