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RIS citation export for THPMP053: Tuning Quadrupoles for Brighter and Sharper Ultra-fast Electron Diffraction Imaging

AU  - Yang, X.
AU  - Doom, L.
AU  - Fedurin, M.G.
AU  - Hidaka, Y.
AU  - Li, J.J.
AU  - Padrazo Jr, D.
AU  - Shaftan, T.V.
AU  - Smaluk, V.V.
AU  - Wan, W.
AU  - Wang, G.M.
AU  - Yu, L.-H.
AU  - Zhu, Y.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Tuning Quadrupoles for Brighter and Sharper Ultra-fast Electron Diffraction Imaging
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - We report our proof-of-principle design and experi-mental commissioning of broadly tunable and low-cost transverse focusing lens system for MeV-energy electron beams at the ultra-fast electron diffraction (UED) beam-line of the Accelerator Test Facility II of BNL. We exper-imentally demonstrate the independent control over the size and divergence of the electron beam at the sample via tunable quadrupoles. By applying online optimiza-tion, we achieve minimum beam sizes 75 ┬Ám from 1 to 13 pC, two orders of magnitude higher charge density than previously achieved using conventional solenoid tech-nique. Finally, we experimentally demonstrate Bragg-diffraction image (BDI) with significant improvement up to 3 times brighter and 2 times sharper BDI peaks via the optimized quadrupoles, improvement larger with higher charge. The result could be crucial for the future single-shot ultra-fast electron microscope development.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 3571
EP  - 3573
KW  - quadrupole
KW  - electron
KW  - focusing
KW  - experiment
KW  - solenoid
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-THPMP053
UR  - http://jacow.org/ipac2019/papers/thpmp053.pdf
ER  -