An ambitious experiment is being developed to measure the force on the antiproton due to the gravitational field of the earth. The technique consists in obtaining antiprotons of the lowest energy possible from the LEAR facility at CERN, decelerating them further in an external beam line, trapping and cooling them to ultralow energy, and measuring their gravitational acceleration by time-of-flight methods. The experiment has been granted CERN approval (PS-200). Present plans and initial development efforts are described.
DOE contract number: W-7405-ENG-36 OSTI Identifier 7045101 Research organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States).