Author: Lai, J.
Paper Title Page
MOPA29 A Fast, Compact Particle Detector for Tuning Radioactive Beams at ATLAS 107
 
  • C. Dickerson, B. DiGiovine, C.R. Hoffman, L.Y. Lin, R.C. Pardo, E. Rehm, G. Savard
    ANL, Argonne, Illinois, USA
  • C. Deibel, J. Lai, D. Santiago-Gonzalez
    LSU, Baton Rouge, Louisiana, USA
 
  Funding: This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics, under contract number DE-AC02-06CH11357.
Radioactive ion beams (RIB) at the Argonne Tandem Linear Accelerator System (ATLAS) are produced either from the in-flight method at 5-15 MeV/u for A < 30, or via reacceleration of fission fragments from the CAlifornium Rare Isotope Breeder Upgrade (CARIBU) at 4-10 MeV/u for 80 < A < 160. These RIB are typically accompanied by contaminant beams >100x more intense. The goal of this work is to develop a fast (>105 pps), compact (retractable from the beam line) particle detector capable of A and Z identification to enable accelerator optimization on the exact species of interest. The detector should have an energy resolution of ≤5% and be resistant to radiation damage. A gas ionization chamber supplemented with an inorganic scintillator was chosen as the basic conceptual design. GSO:Ce was chosen as the primary candidate scintillator due to a demonstrated energy resolution of ~3% for 15 MeV/u He and less irradiation induced performance degradation than other candidate materials.
 
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