arXiv subjects

N. V. Okhotnikov

Publications and source records attributed to N. V. Okhotnikov.

2 recordsLinked to original sources

arXiv2024

Acceleration rate enhancement by negative plasma density gradient in multi-bunch driven plasma wakefield accelerator

In a plasma wakefield accelerator driven by a train of short particle bunches, it is possible to locally increase the acceleration rate by introducing a small negative gradient of the plasma density. A regime is possible in which the gradient affects only the relative phasing of the driver bunches and the wave, keeping the wave phase behind the driver stable. With this technique, it is possible to increase the energy gain of the accelerated witness bunch in a plasma section of limited length.

physics.acc-ph↗

arXiv2024

LCODE: Quasistatic code for simulating long-term evolution of three-dimensional plasma wakefields

A recently developed three-dimensional version of the quasistatic code LCODE has a novel feature that enables high-accuracy simulations of the long-term evolution of waves in plasma wakefield accelerators. Equations of plasma particle motion are modified to suppress clustering and numerical heating of macroparticles, which otherwise occur because the Debye length is not resolved by the numerical grid. The previously observed effects of premature wake chaotization and wavebreaking disappear with the modified equations.

physics.acc-ph↗