Accession Number:

ADA278623

Title:

A High Performance Diamond Thin Film Cold Cathode

Descriptive Note:

Progress rept. no. 1, 1 Aug-30 Sep 1993

Corporate Author:

S I DIAMOND TECHNOLOGY INC HOUSTON TX

Personal Author(s):

• Kumar, Nalin
• Schmidt, Howard

Report Date:

1993-09-29

Pagination or Media Count:

11.0

Abstract:

In the first two months of this project, we have deposited a variety of amorphic diamond coatings on various types of substrates including glass, copper, molybdenum and chromium. The films of various thicknesses have been deposited which are ready for testing. In addition, we have designed and constructed two low voltage test setups as well completed these tests for testing the high current emission properties of these films. These are described in this report. There is a need for developing high current cathodes for e-beam pumped high power visible and near UV lasers. These applications require broad area cathodes which can provide current densities as high as 1000Asq. cm for pulse durations of 1-5 microseconds at a repetition rates as high as 100 pulses sec at voltages in the 100-500 kV range. These are very extreme requirements, but several cathodes such as thermionic cathodes, photo-electric cathodes and cold cathodes have been developed to deliver several tens of amperessq cm current densities. This project concerns with the optimization of field emission cold cathodes using diamond materials.

Descriptors:

• *THIN FILMS
• *DIAMONDS
• *COLD CATHODE TUBES
• EMISSION
• THICKNESS
• MOLYBDENUM
• GLASS
• CATHODES
• PULSES
• CHROMIUM
• ULTRAVIOLET LASERS
• PHOTOELECTRICITY
• THERMIONIC EMISSION
• COPPER
• FIELD EMISSION
• COATINGS
• SUBSTRATES
• CURRENT DENSITY
• VOLTAGE
• COMPOSITE MATERIALS

Subject Categories:

• Electrical and Electronic Equipment
• Laminates and Composite Materials
• Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE