Simple laser-driven, metal photocathodes as cold, high-current electron sources. Master's thesis
Recent developments in excimer laser design have made near ultraviolet light intensities of several megawatts/cm/sup 2/ possible in unfocused beams. These advances and recent experiments indicate that high-current, simple-metal photoemissive electron guns are now feasible. Such guns should produce greater then 50 amps/cm/sup 2/ of illuminated cathode surface. Additionally, these guns could operate at vacuums of .000001 torr with no complicated system components inside the vacuum enclosure. The electron beam produced by such photoemission guns would have a very low emittance and high brightness. This beam would also follow closely the temporal characteristics of the laser pulse, making fast risetime, ultra-short electron-beam pulses possible.
- Research Organization:
- Naval Postgraduate School, Monterey, CA (USA)
- OSTI ID:
- 6711568
- Report Number(s):
- AD-A-175696/4/XAB
- Country of Publication:
- United States
- Language:
- English
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43 PARTICLE ACCELERATORS
430200 -- Particle Accelerators-- Beam Dynamics
Field Calculations
& Ion Optics
BEAM EMITTANCE
BEAMS
BRIGHTNESS
CATHODES
ELECTRODES
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELECTRON EMISSION
ELECTRON GUNS
EMISSION
EXCIMER LASERS
GAS LASERS
KRYPTON FLUORIDE LASERS
LASERS
LEPTON BEAMS
NEAR ULTRAVIOLET RADIATION
OPTICAL PROPERTIES
PARTICLE BEAMS
PHOTOCATHODES
PHOTOELECTRIC EMISSION
PHYSICAL PROPERTIES
RADIATIONS
SURFACES
ULTRAVIOLET RADIATION