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Kim, H. J.

Paper Title Page
TUPP154 Proton Energy Measurement Using Stacked Silicon Detectors 1866
 
  • K. R. Kim
    KAERI, Daejon
  • H. J. Kim, J. H. So
    Kyungpook National University, Daegu
 
  Proton energy was measured using stacked Si(Li) detectors at the MC-50 cyclotron of KIRAMS (Korea Institute of Radiological and Medical Sciences). The proton energies from the cyclotron were 35 MeV and 45 MeV. Generally, using a single semiconductor detecor it is not available to measure the proton energy above 30 MeV because the maximum thickness of the semiconductor detector was limited to 5mm. We have used a detector consisting of three 2 mm thick Si(Li) detectors and a 5 mm thick one. The active areas of these detectors are 75mm2. In this paper, we report the energy measurement results using the stacked detectors.  
THPC059 Studies of Wire Compensation and Beam-beam Interaction in RHIC 3119
 
  • H. J. Kim, T. Sen
    Fermilab, Batavia, Illinois
  • N. P. Abreu, W. Fischer
    BNL, Upton, Long Island, New York
 
  Beam-beam interaction is one of the dominant source of emittance growth and luminosity lifetime deterioration. A current carrying wire has been proposed to compensate long-range beam-beam effects in the LHC and the principle is now being experimentally investigated at RHIC. In this paper, we use simulations to study the effectiveness of wire compensation based on tune footprints, diffusive apertures, and beam loss rates using a parallel weak-strong beam simulation code (BBSIM). In addition we extensively study the diffusion properties of RHIC beams for different beam and wire parameters. Beam-beam effects on emittance growth are investigated through the solution of the diffusion equation for the transverse action variables.