Rayment, MH;
Gurung, L;
Sheldon, RE;
Hogan, SD;
Cassidy, DB;
(2019)
Multiring electrostatic guide for Rydberg positronium.
Physical Review A
, 100
(1)
, Article 013410. 10.1103/PhysRevA.100.013410.
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Abstract
We report the results of experiments in which positronium (Ps) atoms, optically excited to Rydberg-Stark states with principal quantum numbers ranging from n = 13 to 19, were transported along the axis of a multiring electrode structure. By applying alternate positive and negative potentials to the ring electrodes, inhomogeneous electric fields suitable for guiding low-field-seeking atoms along the guide axis were generated. The multiring configuration used has the advantage that once the atoms are confined within it appropriate time-varying fields can be generated for deceleration and trapping. However, in this type of structure the possibility of nonadiabatic transitions of the fast (100 km/s) Ps atoms to unconfined high-field-seeking states exists. We show that for typical guiding fields this is not a significant loss mechanism and that efficient Ps transport can be achieved. Our data are in accordance with a Landau-Zener analysis of adiabatic transport through the field minima and Monte Carlo simulations that take into account Ps velocity distributions, electric dipole moments, and lifetimes, as well as the electric-field distributions in the guide.
Type: | Article |
---|---|
Title: | Multiring electrostatic guide for Rydberg positronium |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1103/PhysRevA.100.013410 |
Publisher version: | https://doi.org/10.1103/PhysRevA.100.013410 |
Language: | English |
Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
Keywords: | Positronium, Rydberg atoms and molecules |
UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
URI: | https://discovery.ucl.ac.uk/id/eprint/10079359 |
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