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Axial interaction free-electron laser

Patent ·
OSTI ID:871133
 [1]
  1. Los Alamos, NM
+ Show Author Affiliations

Electron orbits from a helical axial wiggler in an axial guide field are absolutely unstable as power is extracted from the particles. For off-axis beams an axial FEL mechanism exists when the axial electric field in a TM mode is wiggled to interact with the axial velocity of the electrons that form the beam. The interaction strength is comparable to that for helical FELs and is insensitive to beam orbit errors. The orbits for this mechanism are extremely stable in the absence of space charge and lead to high extraction efficiencies without particle phasing incoherence or interception. This interaction mechanism is suitable for use with intense annular electron beams for high power generation at microwave frequencies.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM
DOE Contract Number:
W-7405-ENG-36
Assignee:
Regents of University of California, Office of Technology (Alameda, CA)
Patent Number(s):
US 5663971
OSTI ID:
871133
Country of Publication:
United States
Language:
English

References (3)

Stable off‐axis electron orbits in a longitudinal‐wiggler free‐electron laser journal August 1995
Measurement of the temporal and spatial phase variations of a pulsed free electron laser amplifier journal January 1994
Stable off-axis electron orbits and their radiation spectrum in a helical wiggler
  • Takeda, H.; Segall, S.; Diament, P.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 237, Issue 1-2 https://doi.org/10.1016/0168-9002(85)90341-9
journal June 1985

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