AEgIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) experiment in progress at CERN has planned to produce antihydrogen ( H ) by using the resonant charge exchange process between orthopositronium (o-Ps) and antiproton ( p ). Its primary goal is the realization of a cold H beam for the first measurement of the Earth’s gravitational acceleration on antimatter. A demanding condition for large o-Ps - p cross section is the cooling of o-Ps at temperatures lower than at least 160 K. We will present recent results of o- Ps formation and cooling at cryogenic temperatures in a novel silicon positron/Ps converter in which oxidized nano-channels perpendicular to the surface were produced. The possibility to tune the nano-channels dimension to optimize o-Ps kinetic energy emission and to avoid o-Ps quantum confinement is discussed
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Titolo: | o-Ps cooling for antihydrogen production | |
Autori: | Mariazzi, Sebastiano; Brusa, Roberto Sennen | |
Autori Unitn: | ||
Titolo del periodico: | JOURNAL OF PHYSICS. CONFERENCE SERIES | |
Anno di pubblicazione: | 2011 | |
Codice identificativo Scopus: | 2-s2.0-79952146522 | |
Codice identificativo WOS: | WOS:000292990500037 | |
Digital Object Identifier (DOI): | http://dx.doi.org/10.1088/1742-6596/262/1/012037 | |
Handle: | http://hdl.handle.net/11572/90250 | |
Appare nelle tipologie: | 03.1 Articolo su rivista (Journal article) |