Towards a compact 0.1-10 MeV broadband betatron photon source

C. E. Clayton, S. F. Martins, J. L. Martins, D. K. Johnson, S. Wang, K. A. Marsh, P. Muggli, M. J. Hogan, D. Walz, R. A. Fonseca, E. Oz, C. D. Barnes, C. L. O'Connell, I. Blumenfeld, N. Kirby, R. Ischebeck, C. Huang, M. Zhou, W. Lu, S. DengT. Katsouleas, W. B. Mori, R. H. Siemann, L. O. Silva, C. Joshi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

When a highly relativistic electron is injected off-axis into an ion channel, the restoring force of the radial field of the ions will cause the electron to accelerate towards the axis, overshoot, and begin to undergo oscillations about the ioncolumn axis at a characteristic frequency; the betatron frequency. This so-called betatron motion will cause the electron to radiate hard x-rays in the forward direction. In two recent experiments at the Stanford Linear Accelerator Center (SLAC), betatron x-rays in the 1-20kV range and in the 1-50MV range were produced with an electron beam with an energy of 28.5 GeV for ion densities of about 1 × 1014 cm-3 and 1 × 1017cm-3, respectively. To make such an x-ray source more compact, the 3km long SLAC linac would be replaced by a source of electrons from a Laser Wakefield accelerator (LWFA). To increase the efficiency of converting laser into photons at high photon energies, we propose adding a second stage where the LWFA electrons radiate via a second ion channel, independent of the accelerating process. This two stage concept allows one to control the critical frequency of the emitted radiation as well as the efficiency of the process.

Original languageEnglish (US)
Title of host publicationHarnessing Relativistic Plasma Waves as Novel Radiation Sources from Terahertz to X-Rays and Beyond
DOIs
StatePublished - 2009
EventHarnessing Relativistic Plasma Waves as Novel Radiation Sources from Terahertz to X-Rays and Beyond - Prague, Czech Republic
Duration: Apr 21 2009Apr 23 2009

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7359
ISSN (Print)0277-786X

Other

OtherHarnessing Relativistic Plasma Waves as Novel Radiation Sources from Terahertz to X-Rays and Beyond
CountryCzech Republic
CityPrague
Period4/21/094/23/09

Keywords

  • Betatron oscillations
  • Betatron x-ray photons
  • Laser wakefield accelerator
  • Plasma wakefield accelerator
  • Relativistic electron

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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