Measurements of nonlinear harmonic generation at the Advanced Photon Source's SASE FEL
- LBNL Library
SASE saturation was recently achieved at the Advanced Photon Source's SASE FEL in the low-energy undulator test line (LEUTL) at 530 nm and 385 nm. The electron beam microbunching becomes more and more prominent until saturation is achieved. This bunching causes nonlinear harmonic emission that extends the usefulness of a SASE system in achieving shorter FEL wavelengths for the same electron beam energy. They have investigated the intensity of the fundamental and second-harmonic undulator radiation as a function of distance along the undulator line and present the experimental results and compare them to numerical simulations. In addition, they have measured the single-shot second harmonic spectra as well as the simultaneous fundamental and second harmonic spectra and present the experimental results.
- Research Organization:
- Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
- Sponsoring Organization:
- DOE
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 842865
- Report Number(s):
- LBNL--50072; ANL-41143 & ANL/AOD/CP-104929
- Country of Publication:
- United States
- Language:
- English
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