Characterization of a transmission positron/positronium converter for antihydrogen production
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F17%3A00318463" target="_blank" >RIV/68407700:21340/17:00318463 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.nimb.2017.05.059" target="_blank" >http://dx.doi.org/10.1016/j.nimb.2017.05.059</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.nimb.2017.05.059" target="_blank" >10.1016/j.nimb.2017.05.059</a>
Alternative languages
Result language
angličtina
Original language name
Characterization of a transmission positron/positronium converter for antihydrogen production
Original language description
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.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10303 - Particles and field physics
Result continuities
Project
<a href="/en/project/LG15052" target="_blank" >LG15052: Investigation of the Microworld using the CERN Infrastructure</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Nuclear Instruments and Methods in Physics Research, Section B, Beam Interactions with Materials and Atoms
ISSN
0168-583X
e-ISSN
1872-9584
Volume of the periodical
407
Issue of the periodical within the volume
Sep
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
12
Pages from-to
55-66
UT code for WoS article
000409290500009
EID of the result in the Scopus database
2-s2.0-85020164743