Characterization of a transmission positron/positronium converter for antihydrogen production

被引：9

作者：

Aghion, S. ^{[1
,2
]}

Amsler, C. ^{[3
,4
]}

Ariga, T. ^{[3
]}

Bonomi, G. ^{[1
,5
,6
]}

Brusa, R. S. ^{[7
,8
]}

Caccia, M. ^{[2
,9
]}

Caravita, R. ^{[10
,11
]}

Castelli, F. ^{[2
,13
]}

Cerchiari, G. ^{[14
]}

Comparat, D. ^{[15
]}

Consolati, G. ^{[2
]}

Demetrio, A. ^{[16
]}

Di Noto, L. ^{[10
,11
]}

Doser, M. ^{[12
]}

Ereditato, A. ^{[3
]}

Evans, C. ^{[1
,2
]}

Ferragut, R. ^{[1
,2
]}

Fesel, J. ^{[12
]}

Fontana, A. ^{[6
]}

Gerber, S. ^{[12
]}

Giammarchi, M. ^{[2
]}

Gligorova, A. ^{[17
]}

Guatieri, F. ^{[7
,8
]}

Haider, S. ^{[12
]}

Hinterberger, A. ^{[12
]}

Holmestad, H. ^{[19
]}

Kellerbauer, A. ^{[14
]}

Krasnicliky, D. ^{[11
]}

Lagomarsino, V. ^{[10
,11
]}

Lansonneur, P. ^{[20
]}

Lebrun, P. ^{[20
]}

Malbrunot, C. ^{[4
]}

Mariazzi, S. ^{[4
,23
]}

Matveev, V. ^{[21
,22
]}

Mazzotta, Z. ^{[2
,13
]}

Mueller, S. R. ^{[16
]}

Nebbia, G. ^{[23
]}

Nedelec, P. ^{[20
]}

Oberthaler, M. ^{[16
]}

Pacifico, N. ^{[17
]}

Pagano, D. ^{[5
,6
]}

Penasa, L. ^{[7
,8
]}

Petracek, V. ^{[18
]}

Povolo, L. ^{[7
,8
]}

Prelz, F. ^{[2
]}

Prevedelli, M. ^{[24
]}

Ravelli, L. ^{[7
,8
]}

Resch, L. ^{[12
]}

Rienacker, B. ^{[12
]}

Robert, J. ^{[15
]}

机构：

[1] Politecn Milan, Piazza Leonardo Vinci 32, I-20133 Milan, Italy

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

[3] Univ Bern, Albert Einstein Ctr Fundamental Phys, Lab High Energy Phys, CH-3012 Bern, Switzerland

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

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

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

[7] Univ Trento, Dept Phys, Via Sommarive 14, I-38123 Povo, Trento, Italy

[8] TIFPA INFN Trento, Via Sommarive 14, I-38123 Trento, Italy

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

[10] Univ Genoa, Dept Phys, Via Dodecaneso 33, I-16146 Genoa, Italy

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

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

[13] Univ Milan, Dept Phys, Via Celoria 16, I-20133 Milan, Italy

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

[15] Univ Paris 11, Univ Paris Saclay, CNRS, Lab Aime Cotton,ENS Cachan, F-91405 Orsay, France

[16] Heidelberg Univ, Kirchhoff Inst Phys, Im Neuenheimer Feld 227, D-69120 Heidelberg, Germany

[17] Univ Bergen, Inst Phys & Technol, Allegaten 55, N-5007 Bergen, Norway

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

[19] Univ Oslo, Dept Phys, Saelandsvei 24, N-0371 Oslo, Norway

[20] Univ Lyon 1, Inst Nucl Phys, CNRS, IN2P3, F-69622 Villeurbanne, France

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

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

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

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

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

[26] Univ Napoli Federico II, Complesso Univ Monte S Angelo, Dept Phys Ettore Pancini, I-80126 Naples, Italy

[27] Res Council Norway, PO Box 564, NO-1327 Lysaker, Norway

[28] Univ Brescia, Dept Civil Engn, Via Branze 43, I-25123 Brescia, Italy

[29] Danish Technol Inst, Kongsvang Atte 29, DK-8000 Aarhus, Denmark

[30] Dept Phys & Astron, Ny Munkegade 120, DK-8000 Aarhus, Denmark

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2017年 / 407卷

基金：

瑞士国家科学基金会;

关键词：

Positronium; Transmission; Antihydrogen; SECONDARY-ELECTRON EMISSION; POSITRON-ANNIHILATION; THIN-FILMS; COLLISIONS; TRANSPORT; GRAPHITE; SURFACES; PLASMA; BEAM; COLD;

D O I：

10.1016/j.nimb.2017.05.059

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

In this work a characterization study of forward emission from a thin, meso-structured silica Received 17 March 2017 positron/positronium (Ps) converter following implantation of positrons in light of possible antihydrogen production is presented. The target consisted of a similar to 1 mu m thick ultraporous silica film e-gun evaporated onto a 20 nm carbon foil. The Ps formation and emission was studied via Single Shot Positron Annihilation Lifetime Spectroscopy measurements after implantation of pulses with 3 4.10(7) positrons and 10 ns temporal width. The forward emission of implanted positrons and secondary electrons was investigated with a micro-channel plate phosphor screen assembly, connected either to a CCD camera for imaging of the impinging particles, or to a fast photomultiplier tube to extract information about their time of flight. The maximum Ps formation fraction was estimated to be similar to 10%. At least 10% of the positrons implanted with an energy of 3.3 keV are forward-emitted with a scattering angle smaller than 50 and maximum kinetic energy of 1.2 keV. At least 0.1-0.2 secondary electrons per implanted positron were also found to be forward-emitted with a kinetic energy of a few eV. The possible application of this kind of positron/positronium converter for antihydrogen production is discussed. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：55 / 66

页数：12

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