Rydberg-positronium velocity and self-ionization studies in a 1T magnetic field and cryogenic environment
- Creators
- Antonello M.
- Belov A.
- Bonomi G.
- Brusa R. S.
- Caccia M.
- Camper A.
- Caravita R.
- Castelli F.
- Comparat D.
- Consolati G.
- Di Noto L.
- Doser M.
- Fani M.
- Ferragut R.
- Fesel J.
- Gerber S.
- Gligorova A.
- Gloggler L. T.
- Guatieri F.
- Haider S.
- Hinterberger A.
- Khalidova O.
- Krasnicky D.
- Lagomarsino V.
- Malbrunot C.
- Mariazzi S.
- Matveev V.
- Muller S. R.
- Nebbia G.
- Nedelec P.
- Nowak L.
- Oberthaler M.
- Oswald E.
- Pagano D.
- Penasa L.
- Petracek V.
- Prelz F.
- Rienacker B.
- Rohne O. M.
- Rotondi A.
- Sandaker H.
- Santoro R.
- Testera G.
- Tietje I. C.
- Wolz T.
- Zimmer C.
- Zurlo N.
- Others:
- Antonello, M.
- Belov, A.
- Bonomi, G.
- Brusa, R. S.
- Caccia, M.
- Camper, A.
- Caravita, R.
- Castelli, F.
- Comparat, D.
- Consolati, G.
- Di Noto, L.
- Doser, M.
- Fani, M.
- Ferragut, R.
- Fesel, J.
- Gerber, S.
- Gligorova, A.
- Gloggler, L. T.
- Guatieri, F.
- Haider, S.
- Hinterberger, A.
- Khalidova, O.
- Krasnicky, D.
- Lagomarsino, V.
- Malbrunot, C.
- Mariazzi, S.
- Matveev, V.
- Muller, S. R.
- Nebbia, G.
- Nedelec, P.
- Nowak, L.
- Oberthaler, M.
- Oswald, E.
- Pagano, D.
- Penasa, L.
- Petracek, V.
- Prelz, F.
- Rienacker, B.
- Rohne, O. M.
- Rotondi, A.
- Sandaker, H.
- Santoro, R.
- Testera, G.
- Tietje, I. C.
- Wolz, T.
- Zimmer, C.
- Zurlo, N.
Description
We characterized the pulsed Rydberg-positronium production inside the Antimatter Experiment: Gravity, Interferometry, Spectroscopy (AEg¯IS) apparatus in view of antihydrogen formation by means of a charge exchange reaction between cold antiprotons and slow Rydberg-positronium atoms. Velocity measurements on the positronium along two axes in a cryogenic environment (≈10K) and in 1T magnetic field were performed. The velocimetry was done by microchannel-plate (MCP) imaging of a photoionized positronium previously excited to the n=3 state. One direction of velocity was measured via Doppler scan of this n=3 line, another direction perpendicular to the former by delaying the exciting laser pulses in a time-of-flight measurement. Self-ionization in the magnetic field due to the motional Stark effect was also quantified by using the same MCP-imaging technique for Rydberg positronium with an effective principal quantum number neff ranging between 14 and 22. We conclude with a discussion about the optimization of our experimental parameters for creating Rydberg positronium in preparation for an efficient pulsed production of antihydrogen.
Additional details
- URL
- http://hdl.handle.net/11567/1068076
- URN
- urn:oai:iris.unige.it:11567/1068076
- Origin repository
- UNIGE