CERN Accelerating science

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Title	Positronium Rydberg excitation diagnostic in a 1T cryogenic environment
Author(s)	Caravita, R (CERN) ; Mariazzi, S (Trento U. ; INFN, Trento) ; Aghion, S (Milan Polytechnic ; INFN, Milan) ; Amsler, C (Stefan Meyer Inst. Subatomare Phys.) ; Antonello, M (INFN, Milan ; Insubria U., Como) ; Belov, A (Mainz U., Inst. Phys. ; Moscow, INR) ; Bonomi, G (Brescia U. ; INFN, Brescia ; INFN, Pavia) ; Brusa, R S (Trento U. ; INFN, Trento) ; Caccia, M (INFN, Milan ; Insubria U., Como) ; Camper, A (CERN) ; Castelli, F (INFN, Milan ; Milan U.) ; Cerchiari, G (Heidelberg, Max Planck Inst.) ; Comparat, D (LAC, Orsay) ; Consolati, G (Milan Polytechnic ; INFN, Milan) ; Demetrio, A (Kirchhoff Inst. Phys.) ; Di Noto, L (INFN, Genoa) ; Doser, M (CERN) ; Evans, C (Milan Polytechnic ; INFN, Milan) ; Fanì, M (CERN ; INFN, Genoa) ; Ferragut, R (Milan Polytechnic ; INFN, Milan) ; Fesel, J (CERN) ; Fontana, A (INFN, Pavia) ; Gerber, S (CERN) ; Giammarchi, M (INFN, Milan) ; Gligorova, A (Stefan Meyer Inst. Subatomare Phys.) ; Guatieri, F (Trento U. ; INFN, Trento) ; Hackstock, P (Stefan Meyer Inst. Subatomare Phys.) ; Haider, S (CERN) ; Hinterberger, A (CERN) ; Holmestad, H (CERN) ; Kellerbauer, A (Heidelberg, Max Planck Inst.) ; Khalidova, O (CERN) ; Krasnický, D (INFN, Genoa) ; Lagomarsino, V (INFN, Genoa) ; Lansonneur, P (Lyon, IPN) ; Lebrun, P (Lyon, IPN) ; Malbrunot, C (CERN ; Stefan Meyer Inst. Subatomare Phys.) ; Marton, J (Stefan Meyer Inst. Subatomare Phys.) ; Matveev, V (Mainz U., Inst. Phys. ; Moscow, INR ; Dubna, JINR) ; Müller, S R (Kirchhoff Inst. Phys.) ; Nebbia, G (INFN, Padua) ; Nedelec, P (Lyon, IPN) ; Oberthaler, M (Kirchhoff Inst. Phys.) ; Pagano, D (Brescia U. ; INFN, Brescia ; INFN, Pavia) ; Penasa, L (Trento U. ; INFN, Trento) ; Petracek, V (Prague, Tech. U.) ; Prelz, F (INFN, Milan) ; Prevedelli, M (INFN, CNAF) ; Rienaecker, B (CERN) ; Robert, J (LAC, Orsay) ; Røhne, O M (Oslo U.) ; Rotondi, A (INFN, Pavia ; Pavia U.) ; Sandaker, H (Oslo U.) ; Santoro, R (INFN, Milan ; Insubria U., Como) ; Smestad, L (CERN ; Bergen U.) ; Sorrentino, F (INFN, Genoa) ; Testera, G (INFN, Genoa) ; Tietje, I C (CERN) ; Vujanovic, M (CERN) ; Widmann, E (Stefan Meyer Inst. Subatomare Phys.) ; Yzombard, P (Heidelberg, Max Planck Inst.) ; Zimmer, C (CERN ; Heidelberg, Max Planck Inst. ; Heidelberg U.) ; Zmeskal, J (Stefan Meyer Inst. Subatomare Phys.) ; Zurlo, N (INFN, Pavia ; Brescia U.)
Publication	2019
Number of pages	6
In:	AIP Conf. Proc. 2182 (2019) 030002
In:	18th International Conference on Positron Annihilation (ICPA-18): Positron Annihilation Spectroscopy-Fundamentals, Techniques ad Applications, Orlando, United States, 19 - 24 Feb 2018, pp.030002
DOI	10.1063/1.5135825
Subject category	Particle Physics - Experiment ; Detectors and Experimental Techniques
Accelerator/Facility, Experiment	CERN AEgIS
Abstract	Forming a pulsed beam of cold antihydrogen using charge-exchange with Rydberg positronium (Ps) is the goal of the AEḡIS collaboration, which aims to a first gravity measurement on neutral antimatter. Recently achieved results in Ps formation and laser spectroscopy in the main AEḡIS apparatus are summarized. First, Ps has been produced using nanochanneled silicon targets in a cryogenic environment (  15 K) with 1 T magnetic field and observed by means of Single-Shot Positron Annihilation Lifetime Spectroscopy. The first demonstration of Ps n=3 excitation has been obtained as well using the same technique, validating the proof-of-concept of AEgIS. Subsequently, a new fast and high sensitivity detection method for laser-excited Ps in high magnetic field has been developed, using the combination of laser/field ionization and an high sensitivity MCP detector coupled to a low-noise CMOS camera. This technique will form the basis of future experiments involving Rydberg Ps spectroscopy in AEḡIS.
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