• M.A. Ferderer, D. Churanov, A.A. Krasnov, M. Urbant, A.A. Zavadtsev, D.A. Zavadtsev
  IBS, Atlanta, Georgia
• S.V. Kutsaev, N.P. Sobenin
  MEPhI, Moscow

In today’s turbulent and unsecure world, an X-ray radiographic image and a dual-energy Z-detection mapping of a container contents are needed to provide a reasonable level of port and border security. An interlaced dual-energy electron-beam linac has been developed for the use in cargo inspection systems to meet this growing need. Electron energy of the linac is software controllable from 3 to 15 MeV. Nominal operating energy levels of 4 and 9 MeV were chosen. The 9 MeV beam energy operating point is used for generating the X-ray radiographic image while 4 and 9 MeV beams are used for Z-detection mapping. The S-band linac has been calculated, designed, built and tested. Frequency repetition rate of alternating 4 and 9 MeV beams is 240 Hz. Pulse length is 10 μs. The beam energy in each beam pulse is over 10 J.

• M. Gusarova, M.V. Lalayan, N.P. Sobenin
  MEPhI, Moscow
• V. Zvyagintsev
  TRIUMF, Vancouver

The results of 3D multipacting simulation in coaxial superconducting quarter wave cavities of the linear accelerator of heavy ions ISAC-II are presented. The multipacting simulation was done using MultP-M code. Dangerous areas of structure and levels of an accelerating field are revealed. Examples of electrons resonant trajectories are presented. Simulation results are compared with experimental results obtained during several superconducting cavities processing.