Electron tube with polycrystalline diamond photocathode

Details Electron tube with polycrystalline diamond photocathode Electron tube with polycrystalline diamond photocathode

1997-09-17

1999-11-09

Day, Michael

Electric lamp and discharge devices

Photosensitive

Photocathode

313544, 313539, 313530, H01J 4006

Patent

active

059820942

ABSTRACT:
A photocathode includes a first layer of polycrystalline diamond or a material mainly composed of polycrystalline diamond. The first layer of polycrystalline diamond may be terminated with hydrogen, or oxygen, and a second layer of an alkali metal or compound of an alkali metal, may be provided on the first layer of polycrystalline diamond whose surface is terminated with hydrogen or oxygen. The photocathode can be use for both reflection and transmission electron tubes and can yield a quantum efficiency higher than that in a monocrystal diamond thin film.

REFERENCES:
patent: 3949187 (1976-04-01), Wulf
patent: 4163174 (1979-07-01), Johnson
patent: 4639638 (1987-01-01), Purcell et al.
patent: 5180951 (1993-01-01), Dworsky et al.
patent: 5381755 (1995-01-01), Glesener et al.
patent: 5463271 (1995-10-01), Geis et al.
patent: 5684360 (1997-11-01), Baum et al.
Himpsel et al, "Quantum Photoyield of Diamond (111)--A Stable Negative-Affinity Emitter", Physical Review B, vol. 20, No. 2, Jul. 15, 1979, pp. 624-627.
Eimori et al, "Photoyield Measurements of CVD Diamond", Diamond and Related Materials 4 (1995), pp. 806-808.
Eimori et al, "Electron Affinity of Single-Crystalline Chemical-Vapor-Deposited Diamond Studied by Ultraviolet Synchrotron Radiation", Jpn. J. Appl. Phys., vol. 33 (1994) pp. 6312-6315, Part 1, No. 11, Nov. 1994.
Fox et al, "Photoelectron Emission From the Cesiated Diamond (110) Surface", Mat. Res. Soc. Symp. Proc., vol. 416, 1996 Materials Research Society, pp. 449-454 (no month).
Loh et al, "Tuning the Electron Affinity of CVD Diamond With Adsorbed Caesium and Oxygen Layers", Diamond and Related Materials, vol. 6 (1997), pp. 874-878. (no month).
Geis et al, "Capacitance--Voltage Measurements on Metal-SiO.sub.2 -Diamond Structures Fabricated With (100)- and (111)-Oriented Substrates", IEEE Transactions On, Mar. (1991).
J. Shirafuji et al., "x-ray photoelectron spectroscopy analysis of plasma-treated surfaces of diamond films" Diamond and Related Materials, vol. 4, 1995, pp. 984-988, XP002050514 * p. 984 * (no month).
P. Muggli et al., "photoemission from diamond and fullerene films for advanced accelerator applications" IEEE Transactions on Plasma Science, vol. 24, No. 2, Apr. 1996, p. 428, XP002050515 * p. 438 *.
Minoru Niigaki et al., "studies on diamond photoemitters" Diamond Films and Technology, vol. 6, No. 6, 1996, pp. 359-363, XP002050516 * p. 359 * (Oct.).
N. Eimori et al., "photoyield measurements of cvd diamond" Diamond and Related Materials, vol. 4, 1995, pp. 806-808, XP002050517 (no month).
Hong D et al., "Field Emission From P-Type Polycrystalline Diamond Films" Mar. 1, 1995, Journal of Vacuum Science and Technology: Part B, vol. 13, NR. 2, pp. 427-430 XP000508555 * pp. 427-429 *.

Affiliated with

Also associated with

Rating

Electron tube with polycrystalline diamond photocathode does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electron tube with polycrystalline diamond photocathode, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electron tube with polycrystalline diamond photocathode will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1460799