scholarly journals Delay-detune scan for longitudinal electron beam characterization at free-electron lasers

2020 ◽  
Vol 23 (12) ◽  
Author(s):  
Svitozar Serkez ◽  
Gianluca Geloni ◽  
Marc Guetg ◽  
Vitali Kocharyan ◽  
Shan Liu ◽  
...  
Keyword(s):  
Electron Beam ◽  
Free Electron ◽  
Free Electron Lasers ◽  
Beam Characterization

scholarly journals Electron-bunch lengthening on higher-harmonic oscillations in storage-ring free-electron lasers

2017 ◽  
Vol 24 (5) ◽  
pp. 912-918 ◽  
Author(s):  
Norihiro Sei ◽  
Hiroshi Ogawa ◽  
Shuichi Okuda
Keyword(s):  
Electron Beam ◽  
Storage Ring ◽  
Free Electron ◽  
Free Electron Laser ◽  
Cavity Length ◽  
Extreme Ultraviolet ◽  
Bunch Length ◽  
Free Electron Lasers ◽  
X Ray ◽  
Higher Harmonic

The influence of higher-harmonic free-electron laser (FEL) oscillations on an electron beam have been studied by measuring its bunch length at the NIJI-IV storage ring. The bunch length and the lifetime of the electron beam were measured, and were observed to have become longer owing to harmonic lasing, which is in accord with the increase of the FEL gain. It was demonstrated that the saturated FEL power could be described by the theory of bunch heating, even for the harmonic lasing. Cavity-length detuning curves were measured for the harmonic lasing, and it was found that the width of the detuning curve was proportional to a parameter that depended on the bunch length. These experimental results will be useful for developing compact resonator-type FELs by using higher harmonics in the extreme-ultraviolet and the X-ray regions.

Use of multiphoton photoelectric process to generate a high brightness electron beam for free‐electron lasers

1994 ◽  
Vol 64 (16) ◽  
pp. 2056-2058 ◽  
Author(s):  
Makoto Asakawa ◽  
Kunioki Mima ◽  
Sadao Nakai ◽  
Masayuki Fujita ◽  
Kazuo Imasaki ◽  
...  
Keyword(s):  
Electron Beam ◽  
Free Electron ◽  
Free Electron Lasers ◽  
High Brightness
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