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Bright and durable field emission source derived from refractory taylor cones

Patent ·
OSTI ID:1336923

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.

Research Organization:
Gregory Hirsch, Pacifica, CA (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
SC0011345
Assignee:
Hirsch; Gregory (Pacifica, CA)
Patent Number(s):
9,524,848
Application Number:
14/536,555
OSTI ID:
1336923
Country of Publication:
United States
Language:
English

References (4)

Stable field-induced electron emission from a solidified liquid metal ion source journal January 1998
Electromigration occurences and its effects on metallic surfaces submitted to high electromagnetic field: A novel approach to breakdown in accelerators
  • 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 https://doi.org/10.1016/j.nima.2011.11.032
journal February 2011
New materials and processes for field emission ion and electron emitters journal March 2013
Formation of a nano-emitter for electron field emission on a liquid metal ion source tip after solidification of the alloy journal December 2002

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Related Subjects

36 MATERIALS SCIENCE
43 PARTICLE ACCELERATORS