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energy-calibration

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MOOBKI01 Central Mass Energy Determination in High Precision Experiments on VEPP-4M luminosity, electron, positron, sextupole 63
 
  • A. Bogomyagkov
  • S. A. Nikitin, I. B. Nikolaev, A. G. Shamov, A. N. Skrinsky, G. M. Tumaikin
    BINP SB RAS, Novosibirsk
  The series of experiments on mass measurements of J/Psi, Psi' and Psi'' mesons have been done on VEPP-4M collider. The accuracy of obtained mass values for JΨ- and Psi'- mesons exceeded more than 3 times the world values, based on experiments on VEPP-4* and E760**. The ongoing experiment on tau lepton mass measurement is expected to achieve accuracy 1.5-2 times better than the present world value. The present paper describes the process and uncertainties of luminosity weighted interaction energy definition. The errors of interaction energy include uncertainties due to beam energy calibration by resonant depolarization technique and errors of interaction energy calculation.

* A. A. Zholentz et al., Phys. Lett. B 96 (1980) 214-216.** T. A. Armstrong et al., Phys. Rev. D47 (1993) 772-783.

 
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FRPMN055 Proton Beam Energy Measurement Using Semiconductor Detectors at the 45MeV Test Beam Line of PEFP proton, cyclotron, vacuum, radiation 4126
 
  • K. R. Kim
  • Y.-S. Cho, I.-S. Hong, H. S. Kim, B.-S. Park, S. P. Yun
    KAERI, Daejon
  • H. J. Kim, J. H. So
    Kyungpook National University, Daegu
  Funding: This research was supported by MOST (Ministry of Science and Technology) of Korea as a sub-project of PEFP (Proton Engineering Frontier Project).

The test beam line was installed at the MC-50 cyclotron of KIRAMS (Korea Institute of Radiological And Medical Sciences). It has been supporting many pilot and feasibility studies on the development of beam utilization technologies of PEFP (Proton Engineering Frontier Project). The energy measurement with high accuracy is very important for the some experiments such as radiation hardness test of semiconductor devices, nuclear physics, detector test, etc. SSB and Si(Li) detector was used as del-E and E detector and the thickness of detectors are 2mm and 5mm each. The available energy range is 10MeV~39MeV and the flux was controlled not to be exceed 1·10+05/cm2-sec using a 0.5mm diameter collimator.