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Agustsson, R. B.

Paper Title Page
THPMS018 High Average Current Betatrons for Industrial and Security Applications 3035
  • S. Boucher, R. B. Agustsson, P. Frigola, A. Y. Murokh, M. Ruelas
    RadiaBeam, Los Angeles, California
  • F. H. O'Shea, J. B. Rosenzweig, G. Travish
    UCLA, Los Angeles, California
  Funding: DOE Grant DE-FG02-04ER84051

The fixed-field alternating-gradient (FFAG) betatron has emerged as a viable alternative to RF linacs as a source of high-energy radiation for industrial and security applications. For industrial applications, high average currents at modest relativistic electron beam energies, typically in the 5 to 10 MeV range, are desired for medical product sterilization, food irradiation and materials processing. For security applications, high power x-rays in the 3 to 20 MeV range are needed for rapid screening of cargo containers and vehicles. In a FFAG betatron, high-power output is possible due to high duty factor and fast acceleration cycle: electrons are injected and accelerated in a quasi-CW mode while being confined and focused in the fixed-field alternating-gradient lattice. The beam is accelerated via magnetic induction from a betatron core made with modern low-loss magnetic materials. Here we present the design and status of a prototype FFAG betatron, called the Radiatron, as well as future prospects for these machines.

TUOBAB02 Experimental Characterization of the Transverse Phase Space of a 60-MeV Electron Beam through a Compressor Chicane 788
  • F. Zhou, A. C. Kabel
    SLAC, Menlo Park, California
  • R. B. Agustsson, G. Andonian, D. B. Cline, A. Y. Murokh, J. B. Rosenzweig
    UCLA, Los Angeles, California
  • V. Yakimenko
    BNL, Upton, Long Island, New York
  Funding: U. S. DOE of Sciences

Space charge and coherent synchrotron radiation may deteriorate electron beam quality when the beam passes through a magnetic bunch compressor. This paper presents the transverse phase-space tomographic measurements for a compressed beam at 60 MeV, around which energy the first stage of magnetic bunch compression takes place in most advanced linacs. Transverse phase-space bifurcation of a compressed beam is observed at that energy, but the degree of the space charge-induced bifurcation is appreciably lower than the one observed at 12 MeV. The Trafic4 simulation confirms the observation.

The paper was published at PRST-AB, November 2006

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TUPMS033 Chicane Radiation Measurements with a Compressed Electron Beam at the BNL ATF 1254
  • G. Andonian, R. B. Agustsson, A. M. Cook, M. P. Dunning, E. Hemsing, A. Y. Murokh, S. Reiche, J. B. Rosenzweig
    UCLA, Los Angeles, California
  • M. Babzien, K. Kusche, R. Malone, V. Yakimenko
    BNL, Upton, Long Island, New York
  The radiation emitted from a chicane compressor has been studied at the Brookhaven National Laboratory (BNL) Accelerator Test Facility (ATF). Coherent edge radiation (CER)is emitted from a compressed electron beam as it traverses sharp edge regions of a magnet. The compression is accompanied by strong self-fields, which are manifested as distortions in the momentum space called beam bifurcation. Recent measurements indicate that the bunch length is approximately 100 fs rms. The emitted THz chicane radiation displays strong signatures of CER. This paper reports on the experimental characterization and subsequent analysis of the chicane radiation measurements at the BNL ATF with a discussion of diagnostics development and implementation. The characterization includes spectral analysis, far-field intensity distribution, and polarization effects. Experimental data is benchmarked to a custom developed start-to-end simulation suite.