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DOE OSTI · 1908459

Beam Envelope Variation due to Space-Charge Neutralization

Ekdahl Jr., Carl August·Jaworski, Michael Andrew·Moir, David C.
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Abstract

Our non-invasive, time-resolved diamagnetic loop measurements of beam size during the electron current-pulse flattop at the exit of our 20-MeV linear induction accelerator revealed that the beam size varied by about 13% during the current flattop. This was an unexpected result, since both current and energy were constant during the interval of radius variation. One possible cause, poor vacuum, was investigated using a time resolved envelope equation. It was found that sufficiently high residual-gas pressure in the downstream transport region could result in the observed variation.

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43 PARTICLE ACCELERATORSionizationlinear induction acceleratorrelativistic electron beam

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Ekdahl Jr., Carl August, Jaworski, Michael Andrew, Moir, David C.. 2023-01-03. Beam Envelope Variation due to Space-Charge Neutralization. https://doi.org/10.2172/1908459

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