Evolution of long pulses in a tapered wiggler free-electron laser

Conference · Sat Jan 01 00:00:00 EST 1983

OSTI ID:5825511

Goldstein, J C

The evolution of a long pulse (pulse length much greater than the slippage distance) in a tapered wiggler free-electron laser is studied by numerical solution of the 1-D theoretical model for a realistic set of magnet, electron beam, and optical resonator parameter values. Single-pass gain curves are calculated for low and high light intensity. We find that an initial, low-amplitude, incoherent pulse grows into a coherent pulse whose growth rate agrees with the calculated small signal gain. The transient evolution of coherent pulses is calculated for several different cavity length detunings, and a quasi steady-state desychronism curve is given. The frequency changing behavior of the optical pulse is shown to occur through sideband generation associated with synchrotron oscillations. Pulse evolution with an ideal intracavity high-pass optical filter is calculated.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5825511
• Report Number(s): LA-UR-83-2411; CONF-8306121-2; ON: DE83017235
• Resource Relation: Conference: 4. workshop on free-electron laser devices, Eastsound, WA, USA, 27 Jun 1983; Other Information: Portions are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
43 PARTICLE ACCELERATORS
FREE ELECTRON LASERS
GAIN
PULSES
ACCELERATOR FACILITIES
OPTICAL FILTERS
OSCILLATORS
SYNCHROTRON OSCILLATIONS
WIGGLER MAGNETS
AMPLIFICATION
BEAM DYNAMICS
ELECTRICAL EQUIPMENT
ELECTROMAGNETS
ELECTRONIC EQUIPMENT
EQUIPMENT
FILTERS
LASERS
MAGNETS
OSCILLATIONS
420300* - Engineering- Lasers- (-1989)
430303 - Particle Accelerators- Experimental Facilities & Equipment