Title :
Electromagnetically pumped free-electron laser in the scheme of separate interaction space from pump wave generator
Author :
Deng, Tianquan ; Zhu, Hui ; Liang, Zheng
Author_Institution :
Res. Inst. of High Energy Electron., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
fDate :
3/1/1994 12:00:00 AM
Abstract :
The theory of an electromagnetically pumped free-electron laser in the scheme of a separate interaction space from the pump wave generator is developed, taking into account the transverse inhomogeneity of incident and scattered waves, and the presence of a magnetic field of 20 kG focusing the particles. The nonlinear computation results, including the coupling coefficients, the excitation curves, powers and efficiency, etc., are obtained on a set of input parameters of our recently established accelerator and FEL system with a pulse high-current relativistic electron beam (600 kV, 3 kA, 70 ns). An experiment is demonstrated in which the relativistic backward wave corrugation oscillator provides a TM01 pump wave with the power of 100 MW at 3 cm wavelength and connects with a smooth tube interaction section to produce stimulated scattering radiation with integral power of 1 MW at 38 mm wavelengths. Also, the numerical and the measured results are compared and discussed
Keywords :
electromagnetism; focusing; free electron lasers; laser theory; stimulated scattering; 1 MW; 100 mW; 20 kG; 3 cm; 3 kA; 600 kV; 70 ns; FEL system; TM01 pump wave; coupling coefficients; electromagnetically pumped free-electron laser; excitation curves; focusing; incident waves; input parameters; integral power; laser efficiency; laser power; magnetic field; nonlinear computation; pulse high-current relativistic electron beam; pump wave generator; relativistic backward wave corrugation oscillator; scattered waves; separate interaction space; smooth tube interaction section; stimulated scattering radiation; transverse inhomogeneity; Electromagnetic scattering; Electron accelerators; Free electron lasers; Laser excitation; Laser theory; Magnetic fields; Optical coupling; Particle accelerators; Particle scattering; Pump lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
