Initial dual-sweep streak camera measurements on the Duke storage ring OK-4 UV/visible FEL
- Argonne National Lab., IL (United States). Advanced Photon Source
- Duke Univ., Durham, NC (United States). FEL Lab.
initial measurements at the Duke storage ring free electron laser (FEL) of both spontaneous emission radiation (SER) from the OK-4 and FEL radiation outcoupled from the oscillator cavity have been done with a dual-sweep streak camera. In the SER case, ANL`s Hamamatsu C5680 streak camera was used to characterize stored electron-beam bunch lengths versus rf gap voltage and single-bunch current. Electron-beam bunch lengths were observed in a range from 50 to 300 ps (FWHM). Particle beam energies of 270 and 500 MeV in the storage ring (SR) were used with the OK-4 to generate SER from 500 nm to less than 200 nm. Sensitivity to single-bunch, single-turn SER was shown down to {approximately}4 {mu}A beam current at {lambda} = 450 nm. by operating in the synchroscan mode and at bunch currents less than 1 mA, beam orbit length vs. the resonator round-trip time was investigated by detecting the relative arrival time of the second pass outcoupled from the resonator at {lambda} {approx} 200 nm. These measurements were used in support of first lasing in the UV-visible regime in November 1996. The dual-sweep streak mode was then used to monitor lasing intensity variations on the 1-ms and 50-ms time scales, to measure a lasing pulse length as short as {approximately}3 ps ({sigma}) at {lambda} = 388 nm at low beam current, and to track the orbit length detuning curve.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 578629
- Report Number(s):
- ANL/ASD/CP-93266; CONF-970885-; ON: DE97054212; TRN: 98:009136
- Resource Relation:
- Conference: FEL `97: international free electron laser conference and 4. free electron laser users` workshop, Beijing (China), 18-22 Aug 1997; Other Information: PBD: Aug 1997
- Country of Publication:
- United States
- Language:
- English
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