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Title: Vacuum encapsulated, high temperature diamond amplified cathode capsule and method for making same

Abstract

A vacuum encapsulated, hermetically sealed cathode capsule for generating an electron beam of secondary electrons, which generally includes a cathode element having a primary emission surface adapted to emit primary electrons, an annular insulating spacer, a diamond window element comprising a diamond material and having a secondary emission surface adapted to emit secondary electrons in response to primary electrons impinging on the diamond window element, a first high-temperature solder weld disposed between the diamond window element and the annular insulating spacer and a second high-temperature solder weld disposed between the annular insulating spacer and the cathode element. The cathode capsule is formed by a high temperature weld process under vacuum such that the first solder weld forms a hermetical seal between the diamond window element and the annular insulating spacer and the second solder weld forms a hermetical seal between the annular spacer and the cathode element whereby a vacuum encapsulated chamber is formed within the capsule.

Inventors:
; ;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1234205
Patent Number(s):
9,224,570
Application Number:
13/896,459
Assignee:
Brookhaven Science Associates, LLC
DOE Contract Number:  
AC02-98CH10886
Resource Type:
Patent
Resource Relation:
Patent File Date: 2013 May 17
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS

Citation Formats

Rao, Triveni, Walsh, Josh, and Gangone, Elizabeth. Vacuum encapsulated, high temperature diamond amplified cathode capsule and method for making same. United States: N. p., 2015. Web.
Rao, Triveni, Walsh, Josh, & Gangone, Elizabeth. Vacuum encapsulated, high temperature diamond amplified cathode capsule and method for making same. United States.
Rao, Triveni, Walsh, Josh, and Gangone, Elizabeth. 2015. "Vacuum encapsulated, high temperature diamond amplified cathode capsule and method for making same". United States. https://www.osti.gov/servlets/purl/1234205.
@article{osti_1234205,
title = {Vacuum encapsulated, high temperature diamond amplified cathode capsule and method for making same},
author = {Rao, Triveni and Walsh, Josh and Gangone, Elizabeth},
abstractNote = {A vacuum encapsulated, hermetically sealed cathode capsule for generating an electron beam of secondary electrons, which generally includes a cathode element having a primary emission surface adapted to emit primary electrons, an annular insulating spacer, a diamond window element comprising a diamond material and having a secondary emission surface adapted to emit secondary electrons in response to primary electrons impinging on the diamond window element, a first high-temperature solder weld disposed between the diamond window element and the annular insulating spacer and a second high-temperature solder weld disposed between the annular insulating spacer and the cathode element. The cathode capsule is formed by a high temperature weld process under vacuum such that the first solder weld forms a hermetical seal between the diamond window element and the annular insulating spacer and the second solder weld forms a hermetical seal between the annular spacer and the cathode element whereby a vacuum encapsulated chamber is formed within the capsule.},
doi = {},
url = {https://www.osti.gov/biblio/1234205}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {12}
}