High-brightness injectors for RF-driven free-electron lasers

Journal Article · Tue Sep 01 00:00:00 EDT 1987 · IEEE J. Quant. Electron.; (United States)

DOI:https://doi.org/10.1109/JQE.1987.1073544· OSTI ID:5982961

Fraser, J S; Sheffield, R L

Free-electron laser (FEL) oscillators require pulse trains of high peak brightness and, in some applications, high average power. Recent developments in the technology of photoemissive and thermionic electron sources in RF cavities for electron linac-injector applications offer promising advances over conventional electron injectors. Reduced emittance growth in high peak current electron injectors may be achieved by using high field strengths and by linearizing the radial component of the cavity electric field at the expense of lower shunt impedance. Harmonically excited cavities have been proposed for enlarging the phase acceptance of linac cavities and thereby reducing the energy spread produced in the acceleration process. Operation of injector linacs at a subharmonic of the main linac frequency is also proposed for enlarging the phase acceptance.

• Research Organization: Los Alamos National Lab., Los Alamos, NM 87545
• OSTI ID: 5982961
• Journal Information: IEEE J. Quant. Electron.; (United States), Vol. QE-23:9
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
FREE ELECTRON LASERS
BRIGHTNESS
RF SYSTEMS
ACCELERATION
ELECTRIC CURRENTS
ELECTRIC FIELDS
ELECTRIC IMPEDANCE
ELECTRON SOURCES
EXCITATION
HARMONICS
LASER CAVITIES
LINEAR ACCELERATORS
OSCILLATORS
ACCELERATORS
CURRENTS
ELECTRONIC EQUIPMENT
ENERGY-LEVEL TRANSITIONS
EQUIPMENT
IMPEDANCE
LASERS
OPTICAL PROPERTIES
OSCILLATIONS
PARTICLE SOURCES
PHYSICAL PROPERTIES
RADIATION SOURCES
420300* - Engineering- Lasers- (-1989)