Long range terahertz driven electron acceleration using phase shifters
| Autor: | Dongfang Zhang, Yushan Zeng, Moein Fakhari, Xie He, Nicholas H. Matlis, Franz X. Kärtner |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Applied physics reviews 9(3), 031407 (2022). doi:10.1063/5.0096685 |
| DOI: | 10.3204/pubdb-2022-02626 |
| Popis: | Applied physics reviews 9(3), 031407 (2022). doi:10.1063/5.0096685 Terahertz radiation (THz)-based electron acceleration has the potential as a technology for driving the next-generation, compact ultrafast and ultrabright electron and x-ray sources. Dephasing is one of the key problems that prevents long THz-electron interaction lengths in the sub- to few-MeV range where electron velocities vary significantly during high-field acceleration. Here, we present a phase-shifter design with double vacuum channels to alternate the phase velocity that effectively extends the THz-electron interaction length in THz-powered dielectrically-loaded waveguides (DLW). The electrons are swept multiple-times back and forth through the accelerating phase of the THz wave to undergo continuous acceleration along the entire interaction. In addition, the double vacuum channel design enables increases to both the phase and group velocities of the THz wave, which leads to an adaptive synchronous acceleration with extended interaction length. This method paves the way for the practical implementation of THz-powered devices for high-energy ultrafast electron sources. Published by AIP, New York, NY |
| Databáze: | OpenAIRE |
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