UV photoemission from metal cathodes for picosecond power switches

Conference · Sun Jan 01 04:00:00 EST 1989

OSTI ID:5995125

Fischer, J; Srinivasan-RAo, T; Tsang, T

Results are reported of photoemission studies using laser pulses of 10 ps duration and 4.66 eV photon energy on metal cathodes. These included thin wires, flat surfaces and an yttrium cathode with a grainy surface. The measurements of current density and quantum efficiency under low and high surface fields indicate that field assisted efficiencies exceeding 0.1% and current densities exceeding 10/sup 5/ A/cm/sup 2/ are obtainable. The results are compared to the requirements of switch power applications. 24 refs., 13 figs., 1 tab.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5995125
• Report Number(s): BNL-42812; CONF-8810135-5; ON: DE89012975
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430300* -- Particle Accelerators-- Auxiliaries & Components
ACCELERATORS
CATHODES
CURRENT DENSITY
EFFICIENCY
ELECTRICAL EQUIPMENT
ELECTRODES
ELEMENTS
EMISSION
EQUIPMENT
FUNCTIONS
LASERS
LINEAR ACCELERATORS
METALS
PHOTOCATHODES
PHOTOEMISSION
QUANTUM EFFICIENCY
SCHOTTKY EFFECT
SECONDARY EMISSION
SWITCHES
TRANSITION ELEMENTS
WORK FUNCTIONS
YTTRIUM