High intensity negative proton beams from a SNICS ion source

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For the past year we have been involved in a project to develop an intense (> 100{mu}A) negative proton beam from a SNICS (Source of Negative Ions by Cesium Sputtering) ion source. This report will cover how we accomplished and exceeded this goal by more than 40%. Included in these observations will be the following: A description of an effective method for making titanium hydride cathodes. How to overcome the limitations of the titanium hydride cathode. The modification of the SNICS source to improve output; including the installation of the conical ionizer and the gas cathode. A discussion of problems ... continued below

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Pages: (11 p)

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Evans, C.R. & Hollander, M.G. January 1, 1991.

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Description

For the past year we have been involved in a project to develop an intense (> 100{mu}A) negative proton beam from a SNICS (Source of Negative Ions by Cesium Sputtering) ion source. This report will cover how we accomplished and exceeded this goal by more than 40%. Included in these observations will be the following: A description of an effective method for making titanium hydride cathodes. How to overcome the limitations of the titanium hydride cathode. The modification of the SNICS source to improve output; including the installation of the conical ionizer and the gas cathode. A discussion of problems including: poisoning the proton beam with oxygen, alternative gas cathode materials, the clogging of the gas inlet, long burn-in times, and limited cathode life times. Finally, how to optimize source performance when using a gas cathode, and what is the mechanism by which a gas cathode operates; facts, fantasies, or myth.

Physical Description

Pages: (11 p)

Notes

OSTI; NTIS; INIS; GPO Dep.

Source

  • Symposium of northeastern accelerator personnel, Albuquerque, NM (United States), 15-19 Oct 1991

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  • Other: DE92011137
  • Report No.: LA-UR-92-905
  • Report No.: CONF-9110258--5
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 5463589
  • Archival Resource Key: ark:/67531/metadc1092675

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • January 1, 1991

Added to The UNT Digital Library

  • Feb. 10, 2018, 10:06 p.m.

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  • March 5, 2018, 6:20 p.m.

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Evans, C.R. & Hollander, M.G. High intensity negative proton beams from a SNICS ion source, article, January 1, 1991; United States. (digital.library.unt.edu/ark:/67531/metadc1092675/: accessed April 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.