Electron energy recovery system for negative ion sources

Title: Electron energy recovery system for negative ion sources

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Abstract

An electron energy recovery system for negative ion sources is provided. The system, employing crossed electric and magnetic fields, separates the electrons from the ions as they are extracted from the ion source plasma generator and before the ions are accelerated to their full energy. With the electric and magnetic fields oriented 90/sup 0/ to each other, the electrons remain at approximately the electrical potential at which they were generated. The electromagnetic forces cause the ions to be accelerated to the full accelerating supply voltage energy while being deflected through an angle of less than 90/sup 0/. The electrons precess out of the accelerating field region into an electron recovery region where they are collected at a small fraction of the full accelerating supply energy. It is possible, by this method, to collect > 90% of the electrons extracted along with the negative ions from a negative ion source beam at < 4% of full energy.

Inventors:: Dagenhart, W.K.; Stirling, W.L.

Issue Date:: 1979-10-25

OSTI Identifier:: 7067698

Assignee:: Dept. of Energy TIC; ERA-06-004608; EDB-81-003784

DOE Contract Number:: W-7405-ENG-26

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: 07 ISOTOPES AND RADIATION SOURCES; ION SOURCES; ENERGY RECOVERY; ACCELERATION; ANIONS; EFFICIENCY; ELECTRIC FIELDS; ELECTRIC POTENTIAL; ELECTRONS; ION BEAMS; MAGNETIC FIELDS; OPERATION; PLASMA PRODUCTION; BEAMS; CHARGED PARTICLES; ELEMENTARY PARTICLES; FERMIONS; IONS; LEPTONS; RECOVERY; 070201* - Radiation Sources- Design, Fabrication & Operation

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                    Dagenhart, W.K., and Stirling, W.L. Electron energy recovery system for negative ion sources.  United States: N. p., 1979. 
        Web.

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                    Dagenhart, W.K., & Stirling, W.L. Electron energy recovery system for negative ion sources.  United States.

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                    Dagenhart, W.K., and Stirling, W.L. Thu .  
        "Electron energy recovery system for negative ion sources".  United States.

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@article{osti_7067698,

  title        = {Electron energy recovery system for negative ion sources},

  author       = {Dagenhart, W.K. and Stirling, W.L.},

  abstractNote = {An electron energy recovery system for negative ion sources is provided. The system, employing crossed electric and magnetic fields, separates the electrons from the ions as they are extracted from the ion source plasma generator and before the ions are accelerated to their full energy. With the electric and magnetic fields oriented 90/sup 0/ to each other, the electrons remain at approximately the electrical potential at which they were generated. The electromagnetic forces cause the ions to be accelerated to the full accelerating supply voltage energy while being deflected through an angle of less than 90/sup 0/. The electrons precess out of the accelerating field region into an electron recovery region where they are collected at a small fraction of the full accelerating supply energy. It is possible, by this method, to collect > 90% of the electrons extracted along with the negative ions from a negative ion source beam at < 4% of full energy.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1979},

  month        = {10}

}

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