Fabrication and testing of corrugated waveguides for a collinear wakefield accelerator

Autor: A. Siy, N. Behdad, J. Booske, M. Fedurin, W. Jansma, K. Kusche, S. Lee, G. Mouravieff, A. Nassiri, S. Oliphant, S. Sorsher, K. Suthar, E. Trakhtenberg, G. Waldschmidt, A. Zholents
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Physical Review Accelerators and Beams, Vol 25, Iss 2, p 021302 (2022)
Druh dokumentu: article
ISSN: 2469-9888
DOI: 10.1103/PhysRevAccelBeams.25.021302
Popis: Significant progress has been made at Argonne National Laboratory in the development of a compact wakefield accelerator based on a cylindrical corrugated waveguide with a 2-mm ID and fine corrugations on the wall. The fabrication process of 10-cm-long corrugated waveguide structures has been established and a high quality of the final product has been confirmed by precision metrology. Several samples have been tested using the electron beam at Brookhaven National Laboratory’s Accelerator Test Facility. The frequency and group velocity of the fundamental monopole TM_{01} mode of sub-terahertz Čerenkov radiation produced by a 1.5-ps-long electron bunch propagating in the corrugated waveguide, as well as the frequencies of the dipole HEM_{11} and the quadrupole HEM_{21} modes have been measured and found to be in good agreement with the design values calculated using CST Microwave Studio. The energy modulation of a 5-ps-long electron bunch caused by the self-induced wakefield has also been measured and found to be in good agreement with the calculated values.
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