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Further Analysis of a Recent Cosmic-Ray Antiproton Experiment

Buffington, A. and Schindler, S. M. (1983) Further Analysis of a Recent Cosmic-Ray Antiproton Experiment. In: 18th International Cosmic Ray Conference, Bangalore, India, August 22 to September 3, 1983. Vol.2. Tata Institute of Fundamental Research , Bombay, India, pp. 71-74.

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Reference is made to the measurements of a cosmic ray antiproton flux at a few hundred MeV reported by Buffington et al. (1981), noting that one of the final background processes to be removed by the data analysis in that study was helium-induced events which satisfied the criteria for topology and timing. The response in the third scintillator S_3 was used to identify and remove these events. For the top two scintillators S_1 and S_2, pulse size information was lost during the data-taking. A method is reported here for the partial retrieval of pulse size information for the scintillator S_2. This is possible because a portion of this signal was subtracted from the Cerenkov response before trigger discrimination and data recording to remove scintillation from the Cerenkov response. For separating protons from more highly charged particles, the method is considered sufficient. It is pointed out that the sample of events identified as antiprotons, for which the method can be applied, has the expected unit charge in scintillator S_2.

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Additional Information:This work is supported by Grant NGR-05-002-160 of the National Aeronautics and Space Administration.
Group:Space Radiation Laboratory
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NASANGR 05-002-160
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Space Radiation Laboratory1983-08
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Deposited On:24 Apr 2014 23:03
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