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Measurements of amplification and phase shift (wave refractive index) in a free-electron laser

Technical Report ·
OSTI ID:6224921
Measurements of the amplification and phase shifts (wave refractive index) in a free-electron laser (FEL) are reported. The studies were carried out at microwave frequencies (7-16 GHz) in a free-electron laser operating in the collective (Raman) regime, using a mildly relativistic electron beam with energy of about 160 keV, and current of about 5A. The observations are found to be in excellent agreement with theoretical predictions based on the full three-dimensional FEL dispersion relation.
Research Organization:
Massachusetts Inst. of Tech., Cambridge (USA). Research Lab. of Electronics
OSTI ID:
6224921
Report Number(s):
AD-A-179399/1/XAB
Country of Publication:
United States
Language:
English

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