TY - JOUR
T1 - Transverse C-band deflecting structure for longitudinal electron-bunch-diagnosis in XFEL "sACLA"
AU - Ego, H.
AU - Maesaka, H.
AU - Sakurai, T.
AU - Otake, Y.
AU - Hashirano, T.
AU - Miura, S.
N1 - Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
PY - 2015/6/29
Y1 - 2015/6/29
N2 - In the 8 GeV compact X-ray FEL "SACLA," a single bunch of electrons is compressed to a duration of approximately 30 fs to yield a peak current of 3 kA, which creates brilliant self-amplified spontaneous emission. To measure the longitudinal profile of an ultrashort electron bunch and verify the compression, we developed a high-gradient C-band RF deflecting structure 1.8 m long and periodically loaded with racetrack-shaped irises. The irises generated a high deflection gradient for the vertically deflecting HEM11-5π/6 dipole mode and suppressed rotation of the deflection plane. The two structures were fabricated and generated a stable total deflecting voltage exceeding 60 MV and revealed the longitudinal electron-bunch profile with an effective time resolution of approximately 10 fs.
AB - In the 8 GeV compact X-ray FEL "SACLA," a single bunch of electrons is compressed to a duration of approximately 30 fs to yield a peak current of 3 kA, which creates brilliant self-amplified spontaneous emission. To measure the longitudinal profile of an ultrashort electron bunch and verify the compression, we developed a high-gradient C-band RF deflecting structure 1.8 m long and periodically loaded with racetrack-shaped irises. The irises generated a high deflection gradient for the vertically deflecting HEM11-5π/6 dipole mode and suppressed rotation of the deflection plane. The two structures were fabricated and generated a stable total deflecting voltage exceeding 60 MV and revealed the longitudinal electron-bunch profile with an effective time resolution of approximately 10 fs.
KW - C-band
KW - Deflecting structure
KW - FEL
KW - Femtosecond
KW - HEM11
KW - Longitudinal profile
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U2 - 10.1016/j.nima.2015.06.018
DO - 10.1016/j.nima.2015.06.018
M3 - Article
AN - SCOPUS:84933556189
VL - 795
SP - 381
EP - 388
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
SN - 0168-9002
ER -