We have produced and analyzed self-amplified spontaneous emission emitted by a relativistic electron beam passing through an undulator for the first time in the mid-infrared. The spectral behavior of the line exhibits an unexpected growth at the start-up of the process.
- self-amplified spontaneous emission
- mid-infrared in a free-electron laser
Prazeres, R., Ortega, J. M., Glotin, F., Jaroszynski, D. A., & Marcouille, O. (1997). Observation of self-amplified spontaneous emission in the mid-infrared in a free-electron laser. Physical Review Letters, 78(11), 2124-2127. https://doi.org/10.1103/PhysRevLett.78.2124