TY - JOUR
T1 - Measurement of low-energy and low-charge ultrashort bunches using an S-band RF deflector
AU - Park, Sunjeong
AU - Kim, Hyun Woo
AU - Kim, Mi Hye
AU - Kim, Young Chan
AU - Baek, In Hyung
AU - Jang, Kyu Ha
AU - Kim, Eun San
AU - Kim, Hongjoo
AU - Vinokurov, Nikolay A.
AU - Jeong, Young Uk
AU - Park, Seong Hee
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/5/21
Y1 - 2019/5/21
N2 - Ultrafast Electron Diffraction (UED) system, using an electron bunch of the duration with less than 100 fs and of the energy with 3 MeV, has been developed as a tool probing the ultrafast dynamics in pump–probe experiments. To keep the temporal and transverse characteristics of the electron bunch for the time-resolved electron diffraction, the bunch charge is limited to be the pico-Coulomb or less. S-band transverse deflecting cavity working on TM 120 mode is designed, fabricated, and installed in the UED system to measure directly the fs-scaled pulse duration of low-energy and low-charge electron bunches. We describe the design and the expected performance of a single-cell RF deflector. For the electron beam of 3 MeV in energy and 1.88 pC in charge, we could measure the bunch duration of 69 fs and the timing jitter of 62 fs, both in rms.
AB - Ultrafast Electron Diffraction (UED) system, using an electron bunch of the duration with less than 100 fs and of the energy with 3 MeV, has been developed as a tool probing the ultrafast dynamics in pump–probe experiments. To keep the temporal and transverse characteristics of the electron bunch for the time-resolved electron diffraction, the bunch charge is limited to be the pico-Coulomb or less. S-band transverse deflecting cavity working on TM 120 mode is designed, fabricated, and installed in the UED system to measure directly the fs-scaled pulse duration of low-energy and low-charge electron bunches. We describe the design and the expected performance of a single-cell RF deflector. For the electron beam of 3 MeV in energy and 1.88 pC in charge, we could measure the bunch duration of 69 fs and the timing jitter of 62 fs, both in rms.
KW - Electron duration measurement
KW - RF deflector
KW - Ultrafast electron diffraction system
KW - Ultrashort bunch measurement
UR - http://www.scopus.com/inward/record.url?scp=85062148741&partnerID=8YFLogxK
U2 - 10.1016/j.nima.2019.01.087
DO - 10.1016/j.nima.2019.01.087
M3 - Article
AN - SCOPUS:85062148741
SN - 0168-9002
VL - 927
SP - 194
EP - 201
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
ER -