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Vigil, R.

Paper Title Page
TUPP029 Weak-Field Gain in Short-Rayleigh Length Free Electron Lasers
 
  • J. Blau, W.B. Colson, S.P. Niles, R. Vigil
    NPS, Monterey, California
  
 

Funding: JTO, ONR, NAVSEA

A compact, high-power free electron laser may require a short-Rayleigh length resonator to reduce the power intensity on the mirrors. Conventional FEL theory predicts that as the Rayleigh length is reduced below an optimum value of approximately one-third of the undulator length, the filling factor and hence the gain will be reduced. However, this theory is only valid for extremely low gains (~1%); for modest gains (~20%), the optical mode is distorted and the amplification is enhanced. Simulations show that the weak-field gain remains fairly constant as the Rayleigh length is reduced.

  
   
TUPP041 Simulations of the Jefferson Lab FEL Using the New Electromagnetic Wiggler 313
 
  • J. Blau, O.E. Bowlin, W.B. Colson, R. Vigil, T. Voughs, B.W. Williams
    NPS, Monterey, California
  
 

Funding: JTO, ONR, NAVSEA

After successfully lasing at 10 kW of average power at a wavelength of 6 μm, a new electromagnetic wiggler has been installed at Jefferson Lab, which will be used to achieve high power at shorter wavelengths. Wavefront propagation simulations are used to predict system performance for weak-field gain and steady-state extraction, as the bunch charge, pulse length, electron beam radius, Rayleigh length, and mirror output coupling are varied.

  
   
TUPP057 Free Electron Lasers in 2005 347
 
  • W.B. Colson, R. Vigil, T. Voughs
    NPS, Monterey, California
  
 

Funding: JTO, ONR, NAVSEA

Twenty-eight years after the first operation of the short wavelength free electron laser (FEL) at Stanford University, there continue to be many important experiments, proposed experiments, and user facilities around the world. Properties of FELs in the infrared, visible, UV, and x-ray wavelength regimes are listed and discussed.

  
   
THPP015 Vibration Effects in Short-Rayleigh Length FELs 480
 
  • P.P. Crooker, R.L. Armstead, J. Blau, O.E. Bowlin, W.B. Colson, R. Vigil, T. Voughs, B.W. Williams
    NPS, Monterey, California
  
 

Funding: JTO, ONR, NAVSEA

The short-Rayleigh length FEL configuration leaves the optical resonator near the cold-cavity stability limit. Studies show that the electron beam interaction stabilizes the optical modes and establishes limits to the vibrations of mirrors and the electron beam. Several types of vibrations are considered.