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Free electron laser using a relativistic beam with spiralling electron

Patent ·
OSTI ID:5774206
A method is described for generating continuously tunable coherent radiation having wavelength in the millimeter and submillimeter range in a longitudinal drift tube comprising the steps of: generating a relativistic electron beam having a transverse velocity component and the corresponding longitudinal velocity component thereof along the axis of the drift tube so as to obtain a non-adiabatically compressed electron beam; converting the longitudinal velocity of the relativistic electron beam into a transverse velocity component thereof and produce a spiralling electron beam; subjecting the electron beam to a wiggler magnetic field having both longitudinal and transverse components thereof in the drift tube; and extracting coherent radiation generated as a result of interaction between the electron beam and the wiggler magnetic field in the drift tube.
Assignee:
Secretary of the Navy, Washington, DC
Patent Number(s):
US 4825441
OSTI ID:
5774206
Country of Publication:
United States
Language:
English

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