RIKEN SPring-8 Center Advanced Electron Gun Development Team
Team Leader: Kazuaki Togawa (D.Sc.)
Research Summary
The Advanced Electron Gun Development Team leads the quality upgrade of the SACLA XFEL in terms of brightness, pulse structure, and stability by developing new electron source technologies. Our research is focused on: (i) search for electron cathodes delivering ultrahigh brightness beams, (ii) electron gun and injector optimization for achieving minimum emittance, (iii) laser-based control of the beam phase-space. Our research takes advantage of basic sciences: beam physics, material and surface science, laser technology, and high-voltage engineering. We aim at developing novel electron sources and accelerators that will enable access to new science fields.
Main Research Fields
- Mathematical & Physical Sciences
Related Research Fields
- Engineering
- Interdisciplinary Science & Engineering
- Quantum beam science-related
Keywords
- Electron source
- Cathode
- Material and surface science
- Beam dynamics
- X-ray free-electron laser
Selected Publications
Papers with an asterisk(*) are based on research conducted outside of RIKEN.
- 1.
Togawa K.:
"Slice emittance measurements using a slit-grid system and a fast wall-current monitor"
Review of Scientific Instruments 95, 043304 (2024) - 2.
Magome T. et al.:
"Precise measurement of the work function of a hot CeB6 thermionic cathode through photoelectron yield spectroscopy using a tunable pulsed laser"
Journal of Applied Physics 133, 165107 (2023) - 3.
Togawa K. et al.:
"Frequency-segmented power amplification using multi-band radio frequency amplifiers to produce a high-voltage pulse"
Review of Scientific Instruments 93, 073304 (2022) - 4.
Ohkochi T. et al.:
"Multilateral surface analysis of the CeB6 electron-gun cathode used at SACLA XFEL",
Journal of Synchrotron Radiation 28, pp.1729 (2021) - 5.
Owada S. et al.:
"A soft X-ray free-electron laser beamline at SACLA: the light source, photon beamline and experimental station"
Journal of Synchrotron Radiation 25, pp.282 (2018) - 6.
Asaka T. et al.:
"Low-emittance thermionic-gun-based injector for a compact free-electron laser"
Physical Review Accelerators and Beams 20, 080702 (2017) - 7.
Ishikawa T. et al.:
"A compact X-ray free-electron laser emitting in the sub-angstrom region"
Nature Photonics 6, pp.540 (2012) - 8.
Shintake T. et al.:
"A compact free-electron laser for generating coherent radiation in the extreme ultraviolet region"
Nature Photonics 2, pp.555 (2008) - 9.
Togawa K. et al.:
"CeB6 electron gun for low-emittance injector"
Physical Review Special Topics Accelerators and Beams 10, 020703 (2007) - 10.
*Togawa K. et al.:
"Surface charge limit in NEA superlattice photocathodes of polarized electron source"
Nuclear Instruments and Methods in Physics Research A 414, pp.431 (1998)
Lab Members
Principal investigator
- Kazuaki Togawa
- Team Leader
Core members
- Vitaliy Goryashko
- Research Scientist
Contact Information
Email: togawa [at] spring8.or.jp