UV photoemission from metal cathodes for picosecond power switches

Conference · Sun Jan 01 00:00:00 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
• Resource Relation: Conference: Switched-power workshop, Shelter Island, NY, USA, 16 Oct 1988; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

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