In recent years, there has been a wealth of new science involving low-energy antimatter (ie,
positrons and antiprotons) at energies ranging from 10 2 to less than 10-3 eV. Much of this …

Abstract The Antiproton Decelerator (AD) facility of CERN began operation in 1999 to serve
experiments for studies of CPT invariance by precision laser and microwave spectroscopy of …

We describe a pulsed positron beam that is optimised for positronium (Ps) laser-
spectroscopy experiments. The system is based on a two-stage Surko-type buffer gas trap …

Four billion positrons (e+) are accumulated in a Penning–Ioffe trap apparatus at 1.2 K and<
6× 10− 17 Torr. This is the largest number of positrons ever held in a Penning trap. The e+ …

We present a description of the GBAR positron (e+) trapping apparatus, which consists of a
three stage Buffer Gas Trap (BGT) followed by a High Field Penning Trap (HFT), and discuss …

Slow positrons are generated from a 22 Na source and cone-shaped solid neon moderator
and extracted as a magnetically guided beam. Measurements are presented for the mean …

Lasers are used to control the production of highly excited positronium atoms (Ps*). The
laser light excites Cs atoms to Rydberg states that have a large cross section for resonant …

The creation of cold antihydrogen atoms by the controlled combination of positrons and
antiprotons has opened up a new window on fundamental physics. More recently …

The anharmonic component of the electric field of a Penning–Malmberg trap is exploited to
manipulate a subset of the radial (r) distribution of trapped positrons, using a dipole field …

Antihydrogen atoms are confined in a magnetic quadrupole trap for 15 to 1000 s-long
enough to ensure that they reach their ground state. This milestone brings us closer to the …