Millimeter wave free electron laser amplifiers: Experiments and designs
- Maryland Univ., College Park, MD (United States). Lab. for Plasma Research
- Science Applications International Corp., McLean, VA (United States)
Free electron laser amplifies are investigated as sources of high- average-power (1 MW) millimeter to submillimeter wave radiation (200 GHz - 600 GHz) for application to electron cyclotron resonance heating of magnetically confined fusion plasmas. As a stepping-stone to higher frequencies and cw operation a pulsed amplifier ({tau}{sub pulse} {approx_equal} 80 ns) at 98 GHz is being developed. Status is reported on this experiment which investigates linear gain amplification with use of sheet electron beam (transverse cross section = 0.1 cm {times} 2.0 cm, V{sub beam} = 440 keV, I{sub beam} {approx_equal} 10 A) and short-period wiggler ({ell}{sub w} = 0.96 cm) and with expected output of 140 W. Predictions of gain and efficiency from a 1-D universal formulation are presented. Beam propagation results, with wiggler focusing as a means of sheet beam confinement in both transverse dimensions, through the 54 cm (56 period) pulsed electromagnet wiggler are discussed. Peak wiggler fields of 5.1 kG on-axis have been achieved.
- Research Organization:
- Maryland Univ., College Park, MD (United States). Lab. for Plasma Research
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG05-87ER52147
- OSTI ID:
- 10137846
- Report Number(s):
- CONF-9108146--2; ON: DE92011813
- Country of Publication:
- United States
- Language:
- English
Similar Records
A high-average power tapered FEL amplifier at submillimeter frequencies using sheet electron beams and short-period wigglers
First operation of a wiggler-focused, sheet beam free electron laser amplifier