| Autor: |
N. S. Ginzburg, A. E. Fedotov, S. V. Kuzikov, K. A. Sharypov, V. G. Shpak, S. A. Shunailov, A. A. Vikharev, M. I. Yalandin, I. V. Zotova |
| Jazyk: |
angličtina |
| Rok vydání: |
2023 |
| Předmět: |
|
| Zdroj: |
Physical Review Accelerators and Beams, Vol 26, Iss 6, p 060401 (2023) |
| Druh dokumentu: |
article |
| ISSN: |
2469-9888 |
| DOI: |
10.1103/PhysRevAccelBeams.26.060401 |
| Popis: |
We report the high-gradient acceleration of electrons driven by a subnanosecond pulse of Ka-band Cherenkov superradiance (SR). The experiments are carried out in a combined “generator-accelerator” scheme, powered by two electron beams from a coaxial explosive-emission graphite cathode. The outer tubular beam (≈300 keV; ≈2.3 kA) propagates along the periodic slow-wave structure (SWS) and generates a backward moving gigawatt-level SR pulse, which pumps a low-Q “pill-box” resonator located at the SWS input. The inner paraxial test beam (≈250 keV; ≈150 A) passes through a hole in the resonator wall and is accelerated in extreme SR fields exceeding 500 MV/m. The energy of accelerated electrons is estimated by measuring the test beam current after it passes through aluminum filters (foils) that absorb low-energy electrons. It is shown that the test beam contains fractions with a maximum energy of 1.25 MeV, which, taking into account the pill-box length of 4 mm, corresponds to the extremely high averaged accelerating gradient of 250 MV/m. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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