In this work we describe a high-resolution position-sensitive detector for positronium. The detection scheme is based on the photoionization of positronium in a magnetic field and the imaging of the freed positrons with a Microchannel Plate assembly. A spatial resolution of (88 ± 5) μm on the position of the ionized positronium –in the plane perpendicular to a 1.0 T magnetic field– is obtained. The possibility to apply the detection scheme for monitoring the emission into vacuum of positronium from positron/positronium converters, imaging positronium excited to a selected state and characterizing its spatial distribution is discussed. Ways to further improve the spatial resolution of the method are presented.
A ∼100 μm-resolution position-sensitive detector for slow positronium / Amsler, C.; Antonello, M.; Belov, A.; Bonomi, G.; Brusa, R.S.; Caccia, M.; Camper, A.; Caravita, R.; Castelli, F.; Cerchiari, G.; Comparat, D.; Consolati, G.; Demetrio, A.; Di Noto, L.; Doser, M.; Fanì, M.; Ferragut, R.; Fesel, J.; Gerber, S.; Giammarchi, M.; Gligorova, A.; Guatieri, F.; Hackstock, P.; Haider, S.; Hinterberger, A.; Kellerbauer, A.; Khalidova, O.; Krasnický, D.; Lagomarsino, V.; Lebrun, P.; Malbrunot, C.; Mariazzi, S.; Matveev, V.; Müller, S.R.; Nebbia, G.; Nedelec, P.; Oberthaler, M.; Oswald, E.; Pagano, D.; Penasa, L.; Petracek, V.; Prelz, F.; Prevedelli, M.; Rienaecker, B.; Robert, J.; Røhne, O.M.; Rotondi, A.; Sandaker, H.; Santoro, R.; Testera, G.; Tietje, I.C.; Widmann, E.; Wolz, T.; Yzombard, P.; Zimmer, C.; Zurlo, N.. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION B, BEAM INTERACTIONS WITH MATERIALS AND ATOMS. - ISSN 0168-583X. - STAMPA. - 457:(2019), pp. 44-48. [10.1016/j.nimb.2019.07.015]
A ∼100 μm-resolution position-sensitive detector for slow positronium
Prevedelli, M.;
2019
Abstract
In this work we describe a high-resolution position-sensitive detector for positronium. The detection scheme is based on the photoionization of positronium in a magnetic field and the imaging of the freed positrons with a Microchannel Plate assembly. A spatial resolution of (88 ± 5) μm on the position of the ionized positronium –in the plane perpendicular to a 1.0 T magnetic field– is obtained. The possibility to apply the detection scheme for monitoring the emission into vacuum of positronium from positron/positronium converters, imaging positronium excited to a selected state and characterizing its spatial distribution is discussed. Ways to further improve the spatial resolution of the method are presented.| File | Dimensione | Formato | |
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11585_69372.pdf
Open Access dal 31/07/2021
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