Enhancing the brightness of high current electron guns

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Concepts such as the two-beam accelerator offer the possibility of translating pulsed power technology into a form useful to the design of high luminosity accelerators for high-energy physics applications. Realization of the promise of these concepts will require the design of electron guns which are optimized with respect to beam brightness at current levels of approximately 1 kA. Because high luminosity implies accelerator operation at high repetition rates, the high-current beam source must be designed so that the beam does not intercept the electrodes. In our investigations of electron gun configurations, we have found that the brightness of a given ... continued below

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Pages: 19

Creation Information

Barletta, W.A.; Birx, D.; Boyd, J.K.; Caporaso, G. & Weir, J.T. January 1, 1985.

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Description

Concepts such as the two-beam accelerator offer the possibility of translating pulsed power technology into a form useful to the design of high luminosity accelerators for high-energy physics applications. Realization of the promise of these concepts will require the design of electron guns which are optimized with respect to beam brightness at current levels of approximately 1 kA. Because high luminosity implies accelerator operation at high repetition rates, the high-current beam source must be designed so that the beam does not intercept the electrodes. In our investigations of electron gun configurations, we have found that the brightness of a given source is set by practical design choices such as peak voltage, cathode type, gun electrode geometry, and focusing field topology. To investigate the sensitivity of beam brightness to these factors in a manner suitable for modelling transient phenomena at the beam head, we have developed a Darwin approximation particle code, DPC. The main component in our experimental program is a readily modified electron gun that allows us to test many candidate cathode materials, types, and electrode geometries at field stresses up to 1 MW/cm. We have also developed several diagnostics suitable for measuring the brightness of intense, low-emittance beams.

Physical Description

Pages: 19

Notes

NTIS, PC A02/MF A01.

Source

  • 7. international free-electron laser conference, Tahoe City, CA, USA, 8 Sep 1985

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  • Other: DE86004482
  • Report No.: UCRL-92669
  • Report No.: CONF-850956-19
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/6049892 | External Link
  • Office of Scientific & Technical Information Report Number: 6049892
  • Archival Resource Key: ark:/67531/metadc1102610

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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, 1985

Added to The UNT Digital Library

  • Feb. 18, 2018, 3:59 p.m.

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  • April 27, 2018, 12:56 p.m.

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Barletta, W.A.; Birx, D.; Boyd, J.K.; Caporaso, G. & Weir, J.T. Enhancing the brightness of high current electron guns, report, January 1, 1985; [Livermore,] California. (digital.library.unt.edu/ark:/67531/metadc1102610/: accessed October 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.