  The Antiproton Decelerator (AD) at CERN provides antiproton bunches with a
kinetic energy of 5.3 MeV. The Extra-Low ENergy Antiproton ring at CERN,
commissioned at the AD in 2018, now supplies a bunch of electron-cooled
antiprotons at a fixed energy of 100 keV. The MUSASHI antiproton trap was
upgraded by replacing the radio-frequency quadrupole decelerator with a pulsed
drift tube to re-accelerate antiprotons and optimize the injection energy into
the degrader foils. By increasing the beam energy to 119 keV, a cooled
antiproton accumulation efficiency of (26 +- 6)% was achieved.
