Positronium (Ps), the unstable bound state of electron and positron, is a valuable system for neutral antimatter spectroscopic studies and for antihydrogen production. Forming a pulsed beam cold antihydrogen using charge-exchange with the Rydberg Ps is the goal of the AEgIS Collaboration, which aims to measure gravity on neutral antimatter. Recent results achieved in producing, manipulating and studying Ps are summarized. Ps has been first produced with mesoporous silica targets in a reflection geometry. Spectroscopy of Ps n = 3 state has been conducted, yielding as a byproduct an independent estimate of the produced Ps temperature. Efficient laser excitation to the Rydberg levels was then achieved, validating the proof-of-concept of AEgIS. Subsequently, production of Ps from a new class of transmission targets was also achieved, opening the possibility for future experiments.

Advances in PS manipulations and laser studies in the AEgIS experiment / C. R., S. Aghion, A. C., B. G., B. R. S., C. M., F. Castelli, C. G., C. D., C. G., D. A., D.N. L., D. M., E. C., F. R., F. J., F. A., G. S., M. Giammarchi, G. A., G. F., H. S., H. A., H. H., K. A., K. O., K. D., L. V., L. P., L. P., M. C., M. S., M. J., M. V., M. Z., M. S. R., N. G., N. P., O. M., P. N., P. D., P. L., P. V., F. Prelz, P. M., R. L., R. B., R. J., R. O. M., R. A., S. H., S. R., S. L., S. F., T. G., T. I., W. E., Y. P., Z. C., Z. J., Z. N.. - In: ACTA PHYSICA POLONICA B. - ISSN 0587-4254. - 48:10(2017), pp. 1583-1592. ((Intervento presentato al 2. convegno Jagiellonian Symposium on Fundamental and Applied Subatomic Physics [10.5506/APhysPolB.48.1583].

Advances in PS manipulations and laser studies in the AEgIS experiment

F. Castelli;M. Giammarchi;F. Prelz;
2017

Abstract

Positronium (Ps), the unstable bound state of electron and positron, is a valuable system for neutral antimatter spectroscopic studies and for antihydrogen production. Forming a pulsed beam cold antihydrogen using charge-exchange with the Rydberg Ps is the goal of the AEgIS Collaboration, which aims to measure gravity on neutral antimatter. Recent results achieved in producing, manipulating and studying Ps are summarized. Ps has been first produced with mesoporous silica targets in a reflection geometry. Spectroscopy of Ps n = 3 state has been conducted, yielding as a byproduct an independent estimate of the produced Ps temperature. Efficient laser excitation to the Rydberg levels was then achieved, validating the proof-of-concept of AEgIS. Subsequently, production of Ps from a new class of transmission targets was also achieved, opening the possibility for future experiments.
Physics and Astronomy (all)
Settore FIS/01 - Fisica Sperimentale
2017
Article (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/542122
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