Confinement of a Large Number of Antiprotons and Production of an Ultraslow Antiproton Beam

2005
Published in:
  • Phys.Rev.Lett. 94 (2005) 023401

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Abstract: (APS)
We have used a radio frequency quadrupole decelerator to decelerate antiprotons emerging from the CERN Antiproton Decelerator from MeV- to keV-scale energy, and collected five decelerated pulses in a multiring trap. Some 5×106 antiprotons were stacked in this way. Cooling of the trapped antiprotons by a simultaneously trapped electron plasma was studied nondestructively via shifts in plasma mode frequencies. We have also demonstrated the first step in extracting a 10–500 eV antiproton beam from the trap.