New sources of coherent radiation by relativistic electrons

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5824687

Chen, C K

Coherent radiation generation by relativistic electrons has the potential advantage of being of higher power, higher efficiency, and more broadly tunable than the conventional laser sources. The following new coherent radiation sources are investigated: the stimulated synchrotron radiation, the dispersive free-electron laser, and the two-cavity optical klystron. The stimulated synchrotron radiation process occurs when electrons and an electromagnetic wave propagate approximately in the same direction in a transverse magnetic field. Under certain specific conditions, gain can occur even though it may be quite small. The dispersive free-electron laser (dispersive FEL) is a normal free-electron laser (FEL) with a dispersive magnetic field - similar to that of the optical klystron (OK) - superimposed on some of the undulator magnets. Small-signal gain, electron energy acceptance bandwidth, and saturation efficiency of the normal FEL, OK, and dispersive FEL are compared. The two-cavity optical klystron is a modified optical klystron where the modulation and energy extraction section have separate cavities. The two cavities allow better bunching and energy extraction than the normal optical klystron. The gain of this device, as defined by output power divided by input power, is derived; the two-cavity optical klystron gain is the square of the single-pass gain divided by the two cavity loss factor.

• Research Organization: Stanford Univ., CA (USA)
• OSTI ID: 5824687
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300 -- Engineering-- Lasers-- (-1989)
420800* -- Engineering-- Electronic Circuits & Devices-- (-1989)
BEAMS
BREMSSTRAHLUNG
COHERENT RADIATION
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELECTRON TUBES
ELECTRONIC EQUIPMENT
EMISSION
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EQUIPMENT
FREE ELECTRON LASERS
KLYSTRONS
LASERS
LEPTON BEAMS
MICROWAVE EQUIPMENT
MICROWAVE TUBES
PARTICLE BEAMS
RADIATION SOURCES
RADIATIONS
RELATIVISTIC RANGE
STIMULATED EMISSION
SYNCHROTRON RADIATION