A Raman FEL (Free Electron Laser) at 2mm Wavelength. Design of an Efficiency-Enhanced Raman FEL Oscillator

A Raman FEL (Free Electron Laser) at 2mm Wavelength. Design of an Efficiency-Enhanced Raman FEL Oscillator

The nonlinear physics of the free electron laser (FEL) involves waves set up in a nearly cold electron beam when it passes through the undulator. In addition to the pump field and the growing scattered EM wave moving parallel to the electrons, there is a disturbance in the beam space charge caused b...

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Bibliographische Detailangaben
Hauptverfasser: Masud,J, Yee,F G, Marshall,T C, Schlesinger,S P
Format: Report
Sprache:eng
Schlagworte:
AMPLIFIERS
CONFIGURATIONS
ELECTROMAGNETIC WAVE PROPAGATION
ELECTRON BEAMS
FREE ELECTRON LASERS
LASER AMPLIFIERS
Lasers and Masers
LOW TEMPERATURE
PUMPING(ELECTRONICS)
RAMAN SPECTRA
SPACE CHARGE
WAVES
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Zusammenfassung:The nonlinear physics of the free electron laser (FEL) involves waves set up in a nearly cold electron beam when it passes through the undulator. In addition to the pump field and the growing scattered EM wave moving parallel to the electrons, there is a disturbance in the beam space charge caused by the ponderomotive force. In this paper we discuss initial experimentation using a simple Raman oscillator and amplifier. The purpose of the oscillator and amplifier. The purpose of the oscillator is to define initially the regions of substantial gain by observing the emission wavelength. Following this, the gain is observed in and amplifier configuration, using a CO sub 2 laser pumping an NH sub 3 gaseous laser at 140 GHz (2.14mm).