Investigation of high current electron beam dynamics in linear induction accelerator for creation of a high-power THz radiation source

Abstract

The work addresses the use of electron beam produced by the linear induction accelerator to generate terahertz radiation pulses of 100 MW power level based on a free electron laser scheme. The beam parameters required for efficient generation are given. The features of transverse beam dynamics when transporting the beam through the linac are investigated. Emphasis is put on the electron injector which geometry and operation parameters mainly determine the beam characteristics at the linac exit. Most of the possible factors contributing to the beam emittance gain in the accelerator are considered. The obtained analytical estimates are compared to the numerical simulation results. The experimental results on compressing and transporting the beam having the electron energy of 5 MeV and the current of 1 kA in the transport system of free electron laser are presented.

Высокоселективные Пространственно-Развитые Брэгговские Резонаторы, Реализующие Трехмерную Распределенную Обратную Связь, Для Мощных Лазеров На Свободных Электронах

“…Данные резонаторы имеют большой потенциал использования в качестве электродинамических систем лазеров на свободных электронах и способны обеспечить устойчивую одномодовую генерацию в условиях существенной сверхразмерности в sub-THz/THz-диапазонах. Разработка лазеров на свободных электронах в указанных диапазонах с sub-GW/GW-уровнем мощности и энегросодержанием в импульсе ∼ 10−100 J, превосходящим таковой для известных мировых аналогов, активно ведется в настоящее время на основе линейного индукционного ускорителя [6] в ИЯФ СО РАН (Новосибирск) в сотрудничестве с ИПФ РАН (Нижний Новгород).…”

High-selective spatially-extended Bragg resonators implementing three-dimensional distributed feedback for powerful free electron lasers

“…pulse energy content of ∼ 10−100 J, which exceeds the one typical of known world-class laser systems of this kind, are currently being constructed based on a linear induction accelerator [6] at the BINP RAS (Novosibirsk) in collaboration with the IAP RAS (Nizhny Novgorod).…”

Terahertz generation by a rotating relativistic electron beam in a magnetized plasma column

“…2007). The interaction of high-current electron beams with a plasma is one of the promising methods for THz field generation (Nikiforov et al 2021). A relativistic electron beam propagating through a plasma can excite electron plasma oscillations via the action of the ponderomotive force.…”