TY - GEN
T1 - Transverse c-band deflecting structure for longitudinal phase space diagnostics in the xfel/spring-8 "SACLA
AU - Ego, H.
AU - Maesaka, H.
AU - Otake, Y.
AU - Sakurai, T.
AU - Hashirano, T.
AU - Miura, S.
PY - 2011/12/1
Y1 - 2011/12/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84876688600&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84876688600&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84876688600
SN - 9789290833666
T3 - IPAC 2011 - 2nd International Particle Accelerator Conference
SP - 1221
EP - 1223
BT - IPAC 2011 - 2nd International Particle Accelerator Conference
T2 - 2nd International Particle Accelerator Conference, IPAC 2011
Y2 - 4 September 2011 through 9 September 2011
ER -