Skip to Content
Find More Like This
Return to Search

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

United States Patent

9,224,570
December 29, 2015
View the Complete Patent at the US Patent & Trademark Office
Brookhaven National Laboratory - Visit the Office of Technology Commercialization and Partnerships Website
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.
Rao; Triveni (Shoreham, NY), Walsh; John (Sound Beach, NY), Gangone; Elizabeth (New Hyde Park, NY)
Brookhaven Science Associates, LLC (Upton, NY)
13/ 896,459
20130320295
May 17, 2013
STATEMENT OF GOVERNMENT LICENSE RIGHTS This invention was made with Government support under contract number DE-AC02-98CH10886, awarded by the U.S. Department of Energy. The Government has certain rights in the invention.