skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Photocathode

Abstract

A photocathode designs that leverage the grazing incidence geometry yield improvements through the introduction of recessed structures, such as cones, pyramids, pillars or cavities to the photocathode substrate surface. Improvements in yield of up to 20 times have been shown to occur in grazing incidence geometry disclosed herein due to a larger path length of the X-ray photons which better matches the secondary electron escape depth within the photocathode material. A photocathode includes a substrate having a first side and a second side, the first side configured to receive x-ray energy and the second side opposing the first side. A structured surface is associated with the second side of the substrate such that the structured surface includes a plurality of recesses from the second side of the substrate into the substrate.

Inventors:
;
Issue Date:
Research Org.:
Nevada Test Site (NTS), Mercury, NV (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1411395
Patent Number(s):
9837238
Application Number:
15/249,197
Assignee:
National Security Technologies, LLC (North Las Vegas, NV)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
G - PHYSICS G01 - MEASURING G01T - MEASUREMENT OF NUCLEAR OR X-RADIATION
DOE Contract Number:  
AC52-06NA25946
Resource Type:
Patent
Resource Relation:
Patent File Date: 2016 Aug 26
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 47 OTHER INSTRUMENTATION

Citation Formats

Opachich, Yekaterina, and MacPhee, Andrew. Photocathode. United States: N. p., 2017. Web.
Opachich, Yekaterina, & MacPhee, Andrew. Photocathode. United States.
Opachich, Yekaterina, and MacPhee, Andrew. Tue . "Photocathode". United States. https://www.osti.gov/servlets/purl/1411395.
@article{osti_1411395,
title = {Photocathode},
author = {Opachich, Yekaterina and MacPhee, Andrew},
abstractNote = {A photocathode designs that leverage the grazing incidence geometry yield improvements through the introduction of recessed structures, such as cones, pyramids, pillars or cavities to the photocathode substrate surface. Improvements in yield of up to 20 times have been shown to occur in grazing incidence geometry disclosed herein due to a larger path length of the X-ray photons which better matches the secondary electron escape depth within the photocathode material. A photocathode includes a substrate having a first side and a second side, the first side configured to receive x-ray energy and the second side opposing the first side. A structured surface is associated with the second side of the substrate such that the structured surface includes a plurality of recesses from the second side of the substrate into the substrate.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2017},
month = {12}
}

Patent:

Save / Share:

Works referenced in this record:

X-Ray Interactions: Photoabsorption, Scattering, Transmission, and Reflection at E = 50-30,000 eV, Z = 1-92
journal, July 1993


High energy photocathodes for laser fusion diagnostics
journal, October 2010