A ∼100 μm-resolution position-sensitive detector for slow positronium

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:457

Article

Amsler, C.³  Antonello, M.^2,4  Belov, A.²⁰  Bonomi, G.^6,7  Brusa, R. S.^8,9  Caccia, M.^2,4  Camper, A.¹⁰  Caravita, R.¹⁰  Castelli, F.^2,11  Cerchiari, G.¹²  Comparat, D.¹³  Consolati, G.^2,14  Demetrio, A.¹⁵  Di Noto, L.^16,17  Doser, M.¹⁰  Fani, M.^10,16,17  Ferragut, R.^1,2  Fesel, J.¹⁰  Gerber, S.¹⁰  Giammarchi, M.²  Gligorova, A.³  Guatieri, F.^8,9  Hackstock, P.³  Haider, S.¹⁰  Hinterberger, A.¹⁰  Kellerbauer, A.¹²  Khalidova, O.¹⁰  Krasnicky, D.¹⁷  Lagomarsino, V^16,17  Lebrun, P.¹⁹  Malbrunot, C.^3,10  Mariazzi, S.^8,9  Matveev, V^5,20  Mueller, S. R.¹⁵  Nebbia, G.²¹  Nedelec, P.¹⁹  Oberthaler, M.¹⁵  Oswald, E.¹⁰  Pagano, D.^6,7  Penasa, L.^8,9  Petracek, V²²  Prelz, F.²  Prevedelli, M.²³  Rienaecker, B.¹⁰  Robert, J.¹³  Rohne, O. M.¹⁸  Rotondi, A.^7,24  Sandaker, H.¹⁸  Santoro, R.^2,4  Testera, G.¹⁷  Tietje, I. C.¹⁰  Widmann, E.³  Wolz, T.¹⁰  Yzombard, P.¹²  Zimmer, C.^10,12,25  Zurlo, N.^7,26 

[1] Politecn Milan, Dept Phys, LNESS, Via Anzani 42, I-22100 Como, Italy

[2] INFN Milano, Via Celoria 16, I-20133 Milan, Italy

[3] Austrian Acad Sci, Stefan Meyer Inst Subat Phys, Bolarnanngasse 3, A-1090 Vienna, Austria

[4] Univ Insubria, Dept Sci, Via Valleggio 11, I-22100 Como, Italy

[5] Joint Inst Nucl Res, Dubna 141980, Russia

[6] Univ Brescia, Dept Mech & Ind Engn, Via Branze 38, I-25123 Brescia, Italy

[7] INFN Pavia, Via Bassi 6, I-27100 Pavia, Italy

[8] Univ Trento, Dept Phys, Via Sommar 14, I-38123 Povo, Trento, Italy

[9] TIFPA INFN Trento, Via Sommar 14, I-38123 Povo, Trento, Italy

[10] CERN, Phys Dept, CH-1211 Geneva 23, Switzerland

[11] Univ Milan, Dept Phys Aldo Pontremoli, Via Celoria 16, I-20133 Milan, Italy

[12] Max Planck Inst Nucl Phys, Saupfercheckweg 1, D-69117 Heidelberg, Germany

[13] Univ Paris Saclay, ENS Paris Saclay, Univ Paris Sud, CNRS,Lab Aime Cotton, F-91405 Orsay, France

[14] Politecn Milan, Dept Aerosp Sci & Technol, Via La Masa 34, I-20156 Milan, Italy

[15] Heidelberg Univ, Kirchhoff Inst Phys, Neuenheimer Feld, D-69120 Heidelberg, Germany

[16] Univ Genoa, Dept Phys, Via Dodecanese 33, I-16146 Genoa, Italy

[17] INFN Genova, Via Dodecaneso 33, I-16146 Genoa, Italy

[18] Univ Oslo, Dept Phys, Sem Soelandsvei 24, N-0371 Oslo, Norway

[19] Univ Lyon 1, CNRS IN2p3, Instinar Nucl Phys, F-69622 Villeurbanne, France

[20] Russian Acad Sci, Inst Nucl Res, Moscow 117312, Russia

[21] INFN Padova, Via Marzolo 8, I-35131 Padua, Italy

[22] Czech Tech Univ, Brehova 7, Prague 11519 1, Czech Republic

[23] Univ Bologna, Viale Berti Pichat 6-2, I-40126 Bologna, Italy

[24] Univ Pavia, Dept Phys, Via Bassi 6, I-27100 Pavia, Italy

[25] Heidelberg Univ, Dept Phys, Neuenheimer Feld 226, D-69120 Heidelberg, Germany

[26] Univ Brescia, Dept Civil Environm Architectural Engn & Math, Via Branze 43, I-25123 Brescia, Italy

关键词: Positronium;    Imaging;   

DOI  :  10.1016/j.nimb.2019.07.015

来源: Elsevier

【 摘 要 】

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) mu m 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.

【 授权许可】

Free