Observations on Microbunching of Electrons in Laser-Driven Plasma Accelerators and Free-Electron Lasers
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Silver Spring, MD (United States)
- Univ. of Texas, Austin, TX (United States)
The periodic longitudinal density modulation of relativistic electrons at the resonant wavelength (microbunching) is a fundamental aspect of free-electron lasers (FELs). In one case, microbunching fractions reached 20% at saturation of a self-amplified spontaneous emission (SASE) FEL resulting in gains of 1 million at 530 nm. In that experiment the $$\textit{z}$$-dependent gain of coherent optical transition radiation (COTR) was also measured. In laser-driven plasma accelerators (LPAs), microbunching at visible wavelengths has also been recently reported as evidenced by significant COTR enhancements measured in near-field and far-field images on a single shot for the first time. An analytical model for COTR interferometry (COTRI) addresses both cases. The broadband microbunching observed in the LPA case could act as a seed for a SASE FEL experiment with tunability in principle over the visible regime.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- DOE Contract Number:
- AC02-07CH11359
- OSTI ID:
- 1596020
- Report Number(s):
- FERMILAB-POSTER-19-111-AD; oai:inspirehep.net:1777869; TRN: US2102622
- Country of Publication:
- United States
- Language:
- English
Similar Records
Observations n Microbunching of electrons in Laser-Driven Plasma Accelerators and Free-Electron
Single-Shot Diagnostics of Microbunched Electrons in Laser-Driven Plasma Accelerators and Free-Electron Lasers