Title :
Resonance transition radiation X-ray lasers
Author :
Reid, Max B. ; Piestrup, Melvin A.
Author_Institution :
NASA Ames Res. Center, Moffett Field, CA, USA
fDate :
11/1/1991 12:00:00 AM
Abstract :
A free electron laser is proposed using a periodic dielectric and helical magnetic field. Periodic synchronism between the electrons and the optical wave is obtained at the period of the dielectric and not at the period of the helical magnetic field. The synchronism condition and the gain of the new device are derived. The effects on the gain of the new device are derived. The effects on the gain from dephasing and beam expansion due to elastic scattering of the electrons in the periodic medium are included in the gain calculation. Examples of the resonance transition radiation laser and klystron are given. Operation at photon energies between 2.5 and 3.5 keV with net gain up to 12% is feasible using high electron-beam energies of 3 and 5 GeV. Moderate (300-MeV) beam energy allows operation between 80 to 110 eV with up to 57% net gain using a klystron design. In both cases, rapid foil heating may limit operation to a single electron-beam pulse
Keywords :
X-ray lasers; free electron lasers; transition radiation; 2.5 to 3.5 keV; 3 to 5 GeV; 300 MeV; 80 to 110 eV; X-ray lasers; beam expansion; dephasing; electron elastic scattering; electron-beam energies; free electron laser; gain; helical magnetic field; klystron; periodic dielectric; periodic synchronism; rapid foil heating; resonance transition radiation laser; single electron-beam pulse; Dielectrics; Electron optics; Free electron lasers; Klystrons; Laser beams; Laser transitions; Magnetic fields; Magnetic resonance; Optical scattering; X-ray lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
