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Title: Porcelain-coated antenna for radio-frequency driven plasma source

A new porcelain-enamel coated antenna creates a clean plasma for volume or surface-conversion ion sources. The porcelain-enamel coating is hard, electrically insulating, long lasting, non fragile, and resistant to puncture by high energy ions in the plasma. Plasma and ion production using the porcelain enamel coated antenna is uncontaminated with filament or extraneous metal ion because the porcelain does not evaporate and is not sputtered into the plasma during operation. Ion beams produced using the new porcelain-enamel coated antenna are useful in ion implantation, high energy accelerators, negative, positive, or neutral beam applications, fusion, and treatment of chemical or radioactive waste for disposal. For ion implantation, the appropriate species ion beam generated with the inventive antenna will penetrate large or small, irregularly shaped conducting objects with a narrow implantation profile.
Inventors:
 [1];  [2];  [3]
  1. (Hercules, CA)
  2. (Kensington, CA)
  3. (Fremont, CA)
Issue Date:
OSTI Identifier:
870753
Assignee:
Regents, University of California (Oakland, CA) LBNL
Patent Number(s):
US 5587226
Contract Number:
AC03-76SF00098
Research Org:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
Country of Publication:
United States
Language:
English
Subject:
porcelain-coated; antenna; radio-frequency; driven; plasma; source; porcelain-enamel; coated; creates; clean; volume; surface-conversion; sources; coating; hard; electrically; insulating; lasting; fragile; resistant; puncture; energy; production; porcelain; enamel; uncontaminated; filament; extraneous; metal; evaporate; sputtered; operation; beams; produced; useful; implantation; accelerators; negative; positive; neutral; beam; applications; fusion; treatment; chemical; radioactive; waste; disposal; appropriate; species; generated; inventive; penetrate; irregularly; shaped; conducting; narrow; profile; porcelain enamel; irregularly shaped; plasma source; electrically insulating; radioactive waste; neutral beam; coated antenna; beam generated; enamel coating; /428/

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