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arXiv 2203.13752physics.plasm-phphysics.acc-ph
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等离子体中相对论质子束团自调制的受控生长

Controlled Growth of the Self-Modulation of a Relativistic Proton Bunch in Plasma

L. Verra

摘要:

在等离子体中传输的细长相对论带电粒子束团具有自调制不稳定性。我们表明,质子束团的SM可以通过由前一个电子束团驱动的尾场来播种。SM定时再现性和控制处于调制周期的一小部分的水平。通过这种播种方法,我们独立地控制种子尾场的幅度与电子束团的电荷和SM的增长率与质子束团的电荷。播种导致较大的增长的尾流场比在不稳定的情况下。

英文摘要:

A long, narrow, relativistic charged particle bunch propagating in plasma is subject to the self-modulation (SM) instability. We show that SM of a proton bunch can be seeded by the wakefields driven by a preceding electron bunch. SM timing reproducibility and control are at the level of a small fraction of the modulation period. With this seeding method, we independently control the amplitude of the seed wakefields with the charge of the electron bunch and the growth rate of SM with the charge of the proton bunch. Seeding leads to larger growth of the wakefields than in the instability case.

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