Generation of coherent THz Cherenkov radiation by electron bunch tilt control

Yuichi Tadenuma, Kazuyuki Sakaue, Tomohiro Toida, Mariko Nishida, Mari Brameld, Tatsuki Murakami, Ryo Yanagisawa, Masakazu Washio, Ryunosuke Kuroda

Research output: Contribution to journalArticlepeer-review

Abstract

We propose a new method that generates coherent Cherenkov radiation by controlling the tilt of the electron bunch. In this scheme, the wavelength band of coherent radiation depends on the transverse size of the electron bunch. This study demonstrates a coherent Cherenkov radiation (CChR) pulse in the THz region corresponding to the beam size. To generate the CChR, we used a 4.8-MeV electron bunch from a photocathode radio-frequency (rf) gun and controlled the angle through an rf transverse deflecting cavity. Our new method increased the pulse intensity by a factor of 7.3 compared to the case without tilting and the THz pulse characteristics well agreed with the prediction.

Original languageEnglish
Article number110102
JournalPhysical Review Accelerators and Beams
Volume25
Issue number11
DOIs
Publication statusPublished - 2022 Nov

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)
  • Surfaces and Interfaces

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