Transverse c-band deflecting structure for longitudinal phase space diagnostics in the xfel/spring-8 "SACLA

H. Ego, H. Maesaka, Y. Otake, T. Sakurai, T. Hashirano, S. Miura

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

8 Citations (Scopus)

Abstract

In SPring-8, the 8 GeV compact XFEL "SACLA" is under commissioning. A single bunch of electrons is compressed down to about 30 fs for brilliant SASE X-ray lasing. It is an important key of stable lasing to investigate the longitudinal phase space and the sliced emittance of a lasing part of the bunch by using a transverse RF deflector. We developed a high gradient C-band deflecting structure operated at 5712 MHz for the bunch diagnosis with a resolution on a femtosecond scale in a limited space in SACLA. The backward travelling-wave of the HEM11-5π/6 mode is excited in the cylindrical structure periodically loaded with racetrack-shaped irises. The featuring irises suppress rotation of the deflection plane and generate strong cell-to-cell coupling for stable resonance. Two 1.8m-long structures were fabricated and installed in SACLA. They successfully generated a deflection voltage of 60 MV and pitched the bunch at the zero-crossing RF phase.

Original languageEnglish
Title of host publicationIPAC 2011 - 2nd International Particle Accelerator Conference
Pages1221-1223
Number of pages3
Publication statusPublished - 2011 Dec 1
Externally publishedYes
Event2nd International Particle Accelerator Conference, IPAC 2011 - Kursaal, San Sebastian, Spain
Duration: 2011 Sep 42011 Sep 9

Publication series

NameIPAC 2011 - 2nd International Particle Accelerator Conference

Other

Other2nd International Particle Accelerator Conference, IPAC 2011
CountrySpain
CityKursaal, San Sebastian
Period11/9/411/9/9

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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