Time-dependent multi-dimensional simulation studies of the electron output scheme for high power FELs
The authors examine the performance of the so-called electron output scheme recently proposed by the Novosibirsk group. In this scheme, the key role of the FEL oscillator is to induce bunching, while an external undulator, called the radiator, then outcouples the bunched electron beam to optical energy via coherent emission. The level of the intracavity power in the oscillator is kept low by employing a transverse optical klystron (TOK) configuration, thus avoiding excessive thermal loading on the cavity mirrors. Time-dependent effects are important in the operation of the electron output scheme because high gain in the TOK oscillator leads to sideband instabilities and chaotic behavior. The authors have carried out an extensive simulation study by using 1D and 2D time-dependent codes and find that proper control of the oscillator cavity detuning and cavity loss results in high output bunching with a narrow spectral bandwidth. Large cavity detuning in the oscillator and tapering of the radiator undulator is necessary for the optimum output power.
- Research Organization:
- Lawrence Berkeley Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 10118209
- Report Number(s):
- LBL--35534; CONF-9408146--18; ON: DE95006593
- Country of Publication:
- United States
- Language:
- English
Similar Records
Multidimensional simulation studies of the SELENE FEL oscillator/buncher followed by a radiator/amplifier output scheme
X-ray FEL based on harmonics generation and electron beam outcoupling
Harmonic generation in VUV/x-ray range at the Duke storage ring FEL using electron beam outcoupling
Conference
·
Tue Jan 31 23:00:00 EST 1995
·
OSTI ID:78706
X-ray FEL based on harmonics generation and electron beam outcoupling
Conference
·
Sat Dec 30 23:00:00 EST 1995
·
OSTI ID:238685
Harmonic generation in VUV/x-ray range at the Duke storage ring FEL using electron beam outcoupling
Conference
·
Sat Dec 30 23:00:00 EST 1995
·
OSTI ID:238844