Antiproton X-ray Spectroscopy in the Cyclotron Trap: Preliminary Results

  • John Missimer
Part of the Ettore Majorana International Science Series book series (EMISS, volume 23)


The principle of the experiment designed to measure the X-ray spectrum of protonium was verified by the Karlsruhe group* during the December, 1983 run at LEAR. The experiment relies on the cyclotron trap, whose characteristics are summarized in the discussion of its application to neutral current experiments in muonic atoms1 and in contributions to previous ERICE proceedings2, 3. The cyclotron trap yields high stopping densities at low gas pressures. During the December run, about 15% of the beam of antiprotons at 300 MeV/c could be accepted by the trap at pressures between 4 00 and 600 mbar. A stopping density of 2 · 105 antiprotons per gram per second was achieved. This density represents an increase by a factor of almost 300 compared to alternative techniques for stopping antiprotons in gases.


Muonic Atom Antiproton Beam Bottom Spectrum Cascade Calculation Hydrogen Spectrum 
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Copyright information

© Plenum Press, New York 1985

Authors and Affiliations

  • John Missimer
    • 1
  1. 1.Schweizerisches Institut fuer NuklearforschungVilligenSwitzerland

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