Seminar Details

New Measurement of the Antiproton Magnetic Moment and Antihydrogen Trapped in Its Ground State

Gerald Gabrielse, Harvard University
Thursday, January 24, 4:10 PM - Physics and Astronomy Colloquium
Biomedical & Physical Sciences Bldg., Rm. 1415

The antiproton magnetic moment is measured for the first time using a single trapped antiproton. The new measurement has an uncertainty that is 680 times smaller than previously obtained with other methods, and improvements of an additional factor of 1000 to 10,000 may eventually be possible. Many trapped anitprotons have been adiabaticially cooled by adiabatircally reducing the depth of the potential well that confines them. The interaction of cold positrons with a larger number of cold positrons produces cold antihydrogen. A few of these antimatter atoms per trial have been confined in the minimum of a magnetic field for long enough to ensure that they are trapped in their ground state., as needed for future laser cooling and precise laser spectroscopy.