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Remec, R.

Paper Title Page
TUPAS050 Determination of Component Activation and Radiation Environment in the Second Stripping Region of a High-Power Heavy-Ion Linear Accelerator 1760
  • I. Baek, R. M. Ronningen, X. Wu, A. Zeller
    NSCL, East Lansing, Michigan
  • R. Remec
    ORNL, Oak Ridge, Tennessee
  Funding: U. S. Department of Energy under Grant No. DE-FG02-04ER41313

In supporting pre-conceptual research and development of the Rare-Isotope Accelerator facility or similar next-generation exotic beam facilities, one critical focus area is to estimate the level of activation and radiation in the linear accelerator second stripping region and to determine if remote handling is necessary in this area. A basic geometric layout of the second stripping region having beamline magnets, beam pipes and boxes, a stripper foil, beam slits, and surrounding concrete shielding was constructed for Monte Carlo simulations. Beam characteristics were provided within the stripping region based on this layout. Radiation fields, radioactive inventories, levels of activation, heat loads on surrounding components, and prompt and delayed radiation dose rates were simulated using Monte-Carlo radiation transport code PHITS. Preliminary results from simulations using a simplified geometry show that remote handling of foils and slits will be necessary. Simulations using a realistic geometry are underway and the results will be presented.

TUPAS052 Radiation Environment at ISOL Target Station of Rare Isotope Facility 1766
  • M. A. Kostin, I. Baek, V. Blideanu, G. Bollen, D. Lawton, R. M. Ronningen
    NSCL, East Lansing, Michigan
  • L. Ahle, S. Reyes, K. L. Whittaker
    LLNL, Livermore, California
  • T. Burgess, D. L. Conner, T. A. Gabriel, R. Remec
    ORNL, Oak Ridge, Tennessee
  • D. J. Vieira
    LANL, Los Alamos, New Mexico
  Next-generation exotic beam facilities will offer a number of approaches to produce rare isotopes far from stability. One of the approaches is the Isotope Online (ISOL) separation concept, that is, the isotope production by interactions of light ion beams with heavy nuclei of targets. A pre-conceptual design of an ISOL target station was done as part of the research and development work for the Rare Isotope Accelerator (RIA). This report summarizes the results of radiation simulations for the RIA ISOL target station. The above includes radiation effects such as: prompt doses around the target station and from neutron sky-shine; residual activation effects such as ground water, air, and component activation; life-time of target station components; and heating and cooling for target, beam dumps, and shielding.