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Bolton, P.R.

Paper Title Page
TU6PFP009 Designing Integrated Laser-Driven Ion Accelerator Systems for Hadron Therapy at PMRC (Photo Medical Research Center) 1309
 
  • H. Sakaki, P.R. Bolton, T. Hori, S. Kawanishi, M. Nishiuchi
    JAEA, Ibaraki-ken
  • H. Daido
    JAEA/Kansai, Kyoto
  • Y. Iseki, T. Yoshiyuki
    Toshiba, Tokyo
  • A. Noda, H. Souda
    Kyoto ICR, Uji, Kyoto
  • K. Sutherland
    Hokkaido University, Sapporo
  
 

The cancer treatment with hadron beams continues to be made as hadron treatment facilities are being developed around the globe with state-of-the-art accelerator technology. The generation of energetic protons and ions from laser-plasma interactions, has made laser-driven hadron radiotherapy a subject of strong interest. Proton bunches with high peak current and ultralow emittance are typical of ultrafast laser-foil interactions. However, these bunches also exhibit large divergence and energy spread. Photo Medical Research Center (PMRC) of JAEA was recently established to address the challenge of the laser-driven ion accelerator development for hadron therapy. Our mission at PMRC is to develop integrated, laser-driven ion accelerator systems (ILDIAS) that demonstrate desired beam characteristics for such therapy. We used the Phase and Radial Motion in Ion Linear Accelerators (PARMILA) design software which was originally developed as a numerical tool to design and simulate beam performance. This report will discuss beam specifications of laser-driven ion accelerators using PARMILA.

  
MO6RFP088 Operating a Tungsten Dispenser Cathode in Photo-Emission Mode 575
 
  • S.M. Gierman, P.R. Bolton, W.J. Corbett, G.R. Hays, F. King, R.E. Kirby, J.F. Schmerge, J.J. Sebek
    SLAC, Menlo Park, California
  
 

Funding: Supported by US DOE under contract DE-AC03-76SF00515.


The Stanford Synchrotron Radiation Laboratory operates a thermionic radio-frequency gun as part of its injector for the SPEAR 3 storage ring. In order to generate the high bunch charge required for top-off injection, it may be advantageous to operate the thermionic cathode as a photo-emitter. In this note we report on measurements of the wavelength dependence of the quantum efficiency of a tungsten dispenser cathode in a low-field environment, and on high-power tests of the injector in photoemission mode.