Düsseldorf 2007 – wissenschaftliches Programm

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SYCP: Symposium Strongly coupled plasmas

SYCP 1: Symposium Strongly Coupled Plasmas

SYCP 1.6: Hauptvortrag

Dienstag, 20. März 2007, 17:00–17:30, 5D

Forming, trapping, and cooling of strongly magnetized highly excited antihydrogen atoms — •Hossein Sadeghpour — Harvard-Smithsonian Center for Astrophysics, Cambridge, Ma USA

A theoretical framework for the formation of Rydberg atoms in strong magnetized nonneutral plasma will be described with an aim toward the production of highly excited Rydberg antihydrogen (H) atoms at CERN. A number of challenges hindering a quantitative understanding of how Hbar atoms are formed- the details of velocity and field ionization spectra- are overcome. It is shown that a novel cooling technique due to spontaneous decay efficiently brings the Rydberg H atoms to their ground state and leads to trapping of ground state H atoms. The long-time dynamics in strong inhomogeneous magnetic field traps is numerically investigated and analytical expressions for the cooling efficiency and final temperature as a function of the trapping magnetic multipole order will be given.