Bunch length measurement with 2-cell rf-deflector at Waseda University

T. Takahashi, Y. Nishimura, M. Nishiyama, Kazuyuki Sakaue, Masakazu Washio, T. Takatomi, J. Urakawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


We have been studying on a system to measure the length of electron bunch generated by a photocathode rf electron gun at Waseda University. We adopted the rf-deflector system which can convert the longitudinal distribution to transverse by sweeping the electron bunch. By using HFSS, we optimized the design of the 2 cell rf-deflector which is operating on π-mode, dipole (TM210) mode at 2856 MHz. The fabrication and the tuning of the rf deflector have successfully processed. We have installed the rf-deflector in the accelerator system of Waseda University, and performed the measurement of the bunch length. It is confirmed that this rf-deflector has the temporal resolution of 167fs with 700kW supply when the beam energy is 4.8MeV. This means that our rf-deflector system has possibility to measure the ultra-short bunch length. In this conference, the rf-deflector system in Waseda University, the result of the bunch length measurement, the performance of the rf-deflector and the future plan will be reported.

Original languageEnglish
Title of host publicationIPAC 2014: Proceedings of the 5th International Particle Accelerator Conference
PublisherJoint Accelerator Conferences Website (JACoW)
Number of pages3
ISBN (Print)9783954501328
Publication statusPublished - 2014 Jul 1
Event5th International Particle Accelerator Conference, IPAC 2014 - Dresden, Germany
Duration: 2014 Jun 152014 Jun 20


Other5th International Particle Accelerator Conference, IPAC 2014

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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