This paper reviews features of solenoid lenses, which are used to focus high-current electron beams. It also discusses how to characterize spherical aberration with a numerical orbit code, and how to employ scaling methods to organize simulations for maximum generality.
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This tutorial addresses a common issue in electron gun design: for a given voltage, what is the highest possible beam current?
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A frequent electron gun design goal is to produce a converging beam that matches to a focusing solenoid. This white paper describes a case study for a system to generate a narrow electron beam at high-current density and to transport it over a distance exceeding 8.0 cm for experiments on high- frequency microwave generation.
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This white paper illustrates how to use finite-element codes to calculate inductance. The calculations address transmission lines in the limit that the radiation wavelength is long compared to the transverse dimensions of the structure. The paper also shows how to set up solutions with two-dimensional PerMag code (for static magnetic fields) to get useful information for both the low and high-frequency limits.
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This paper describes new methods in the Trak charged-particle optics code to find the self-consistent, beam-generated magnetic fields of high-current beams. The modifications are helpful for general work with relativistic electron beams. They are critical for simulations of high-power microwave devices like the relativistic magnetron and the magnetically-insulated line oscillator.
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