The dielectric wall accelerator

George J Caporaso, Yu Jiuan Chen, Stephen E. Sampayan

Research output: Chapter in Book/Report/Conference proceedingChapter

31 Scopus citations


Dielectric wall accelerators, a class of induction accelerators, employ a novel insulating beam tube to impress a longitudinal electric field on a bunch of charged particles. The surface flashover characteristics of this tube may permit the attainment of accelerating gradients on the order of 100MV/m for accelerating pulses on the order of a nanosecond in duration. A virtual traveling wave of excitation along the tube is produced at any desired speed by controlling the timing of pulse-generating modules that supply a tangential electric field to the tube wall. Because of the ability to control the speed of this virtual wave, the accelerator is capable of handling any charge-to-mass-ratio particle; hence it can be used for electrons, protons and any ion. The accelerator architectures, key technologies and development challenges will be described.

Original languageEnglish (US)
Title of host publicationReviews of Accelerator Science and Technology: Volume 2: Medical Applications of Accelerators
PublisherWorld Scientific Publishing Co.
Number of pages12
ISBN (Electronic)9789814299350
ISBN (Print)9789814299343
StatePublished - Jan 1 2009
Externally publishedYes


  • Dielectric wall accelerators
  • Hadron therapy
  • High gradient insulators
  • Photoconductive switches
  • Proton therapy

ASJC Scopus subject areas

  • Engineering(all)
  • Medicine(all)
  • Physics and Astronomy(all)


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