Enhancing the brightness of high current electron guns

W. A. Barletta, D. Birx, J. K. Boyd, George J Caporaso, J. T. Weir

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

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 MV/cm. We have also developed several diagnostics suitable for measuring the brightness of intense, low-emittance beams.

Original languageEnglish (US)
Pages (from-to)80-86
Number of pages7
JournalNuclear Inst. and Methods in Physics Research, A
Volume250
Issue number1-2
DOIs
StatePublished - Sep 1 1986
Externally publishedYes

Fingerprint

Electron guns
electron guns
high current
Luminance
brightness
Particle accelerators
accelerators
Electrodes
Cathodes
electrodes
cathodes
luminosity
Geometry
High energy physics
translating
geometry
emittance
stress distribution
Topology
repetition

ASJC Scopus subject areas

  • Instrumentation
  • Nuclear and High Energy Physics

Cite this

Enhancing the brightness of high current electron guns. / Barletta, W. A.; Birx, D.; Boyd, J. K.; Caporaso, George J; Weir, J. T.

In: Nuclear Inst. and Methods in Physics Research, A, Vol. 250, No. 1-2, 01.09.1986, p. 80-86.

Research output: Contribution to journalArticle

Barletta, W. A. ; Birx, D. ; Boyd, J. K. ; Caporaso, George J ; Weir, J. T. / Enhancing the brightness of high current electron guns. In: Nuclear Inst. and Methods in Physics Research, A. 1986 ; Vol. 250, No. 1-2. pp. 80-86.
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