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Title: Bright and durable field emission source derived from refractory taylor cones

A method of producing field emitters having improved brightness and durability relying on the creation of a liquid Taylor cone from electrically conductive materials having high melting points. The method calls for melting the end of a wire substrate with a focused laser beam, while imposing a high positive potential on the material. The resulting molten Taylor cone is subsequently rapidly quenched by cessation of the laser power. Rapid quenching is facilitated in large part by radiative cooling, resulting in structures having characteristics closely matching that of the original liquid Taylor cone. Frozen Taylor cones thus obtained yield desirable tip end forms for field emission sources in electron beam applications. Regeneration of the frozen Taylor cones in-situ is readily accomplished by repeating the initial formation procedures. The high temperature liquid Taylor cones can also be employed as bright ion sources with chemical elements previously considered impractical to implement.
Inventors:
Issue Date:
OSTI Identifier:
1336923
Assignee:
Hirsch; Gregory (Pacifica, CA) CHO
Patent Number(s):
9,524,848
Application Number:
14/536,555
Contract Number:
SC0011345
Resource Relation:
Patent File Date: 2014 Nov 07
Research Org:
Gregory Hirsch, Pacifica, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; 36 MATERIALS SCIENCE

Other works cited in this record:

Stable field-induced electron emission from a solidified liquid metal ion source
journal, January 1998
  • Chen, L. W.; Wang, Y. L.
  • Applied Physics Letters, Vol. 72, Issue 3, p. 389-391
  • DOI: 10.1063/1.120745

Formation of a nano-emitter for electron field emission on a liquid metal ion source tip after solidification of the alloy
journal, December 2002

New materials and processes for field emission ion and electron emitters
journal, March 2013

Electromigration occurences and its effects on metallic surfaces submitted to high electromagnetic field: A novel approach to breakdown in accelerators
journal, February 2011
  • Antoine, C. Z.; Peauger, F.; Le Pimpec, F.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 665, p. 54-69
  • DOI: 10.1016/j.nima.2011.11.032

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