Growth Rates in Smith-Purcell FEL
K.V. Ivanyan
TL;DR
This paper investigates the growth rates of Smith-Purcell free-electron lasers (SPFEL) with rectangular gratings, introducing a new calculation method and analyzing how growth rates depend on various parameters.
Contribution
A novel method for calculating partial amplitude coefficients in SPFEL with rectangular gratings and analysis of growth rate dependencies.
Findings
Growth rate dependence on harmonic number
Growth rate dependence on beam current
Growth rate dependence on observation angle
Abstract
In the framework of the earlier derived dispersion equation, we study induced Smith Purcell (SP) radiation of relativistic electron beam in the absence of a resonator. We offer a new method for calculation of coefficients for partial amplitudes in the case of rectangular grating. Using this method we calculate the growth rate of the SPFEL with a rectangular grating. The growth rate dependences on harmonic number, beam current, observation angle and relativistic factor are presented.
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Taxonomy
TopicsParticle Accelerators and Free-Electron Lasers · Magnetic properties of thin films · Advanced Materials Characterization Techniques