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A High Performance Diamond Thin Film Cold Cathode
Progress rept. no. 1, 1 Aug-30 Sep 1993
S I DIAMOND TECHNOLOGY INC HOUSTON TX
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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.
APPROVED FOR PUBLIC RELEASE