Abstract
Here we discuss the possibility of employment of ultrarelativistic electron and proton bunches for generation of high plasma wakefields in dense plasmas due to the Cherenkov resonance plasma-bunch interaction. We estimate the maximum amplitude of such a wake and minimum system length at which the maximum amplitude can be generated at the given bunch parameters.
Highlights
Proposals for generating high wakefields by nonrelativistic electron bunches propagating through plasma were first made in 1949 [1,2]
We discuss the possibility of employment of ultrarelativistic monoenergetic electron and proton bunches for generation of high plasma wakefields in dense plasmas due to Cherenkov resonance plasmabunch interaction
We estimate the maximum amplitude of such a wakefield and minimum plasma, bunch lengths at which the maximum amplitude can be generated at the given plasma and bunch parameters
Summary
Proposals for generating high wakefields by nonrelativistic electron bunches propagating through plasma were first made in 1949 [1,2]. It was shown that the relativistic electron bunches can generate plasma waves with high relativistic phase velocity including the transverse electromagnetic waves efficiently radiated out of plasma [3]. The idea to accelerate the charged particles in a plasma medium using collective plasma fields belongs to Budker, Veksler, and Fainberg [6,7,8] Later on, another acceleration scheme using a time-shifted sequence of bunched highenergy electrons injected into a cold plasma was proposed when the late-coming electron bunch riding on the wave, produced by the first-coming bunch, at a proper phase will be boosted to a higher energy [9]. We make an estimation of plasma parameters, maximum amplitude of the generated wakefield when the ultrarelativistic electron and proton bunches are employed and plasma, bunch lengths at which the maximum amplitude of the wakefield can be gained
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