Investigation of silicon sensors for their use as antiproton annihilation detectors

Pacifico, N.; Aghion, S.; Ahlén, O.; Belov, Alexander S.; Bonomi, G.; Bräunig, P.; Bremer, J.; Brusa, R. S.; Burghart, G.; Cabaret, L.; Caccia, M.; Canali, C.; Caravita, R.; Castelli, F.; Cerchiari, G.; Cialdi, S.; Comparat, D.; Consolati, G.; Viá, C. Da; Derking, J. H.; Domizio, S. Di; Noto, L. Di; Doser, M.; Dudarev, A.; Ferragut, R.; Fontana, A.; Genova, P.; Giammarchi, M.; Gligorova, A.; Gninenko, S.; Haider, S.; Harasimowicz, J.; Huse, T.; Jordan, Elena; Jørgensen, L. V.; Kaltenbacher, T.; Kellerbauer, A.; Knecht, A.; Krasnický, D.; Lagomarsino, V.; Lehner, S.; Magnani, A.; Malbrunot, C.; Mariazzi, S.; Matveev, V.; Moia, F.; Nebbia, G.; Nellist, C.; Nédélec, P.; Oberthaler, Markus K.; Petráček, V.; Prelz, F.; Prevedelli, M.; Regenfus, C.; Riccardi, C.; Røhne, O.; Rotondi, A.; Sandaker, H.; Sosa, A.; Vásquez, M. A. Subieta; Špaček, M.; Testera, G.; Welsch, Carsten; Widmann, E.; Yzombard, P.; Zavatarelli, S.; Zmeskal, J.

doi:10.1016/j.nima.2014.06.036

Cited by 6 publications

(6 citation statements)

References 10 publications

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“…We further demonstrate the potential shown by the Timepix3 in its use as a direct-annihilation detector. These results complement previous works published by our group, employing different sensor technologies [4][5][6].…”

Section: Introductionsupporting

confidence: 91%

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Direct detection of antiprotons with the Timepix3 in a new electrostatic selection beamline

Pacifico

Aghion

Alozy

et al. 2016

Nuclear Instruments and Methods in Physics Research Section A:

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a b s t r a c tWe present here the first results obtained employing the Timepix3 for the detection and tagging of annihilations of low energy antiprotons. The Timepix3 is a recently developed hybrid pixel detector with advanced Time-of-Arrival and Time-over-Threshold capabilities and has the potential of allowing precise kinetic energy measurements of low energy charged particles from their time of flight. The tagging of the characteristic antiproton annihilation signature, already studied by our group, is enabled by the high spatial and energy resolution of this detector. In this study we have used a new, dedicated, energy selection beamline (GRACE). The line is symbiotic to the AEgIS experiment at the CERN Antiproton Decelerator and is dedicated to detector tests and possibly antiproton physics experiments. We show how the high resolution of the Timepix3 on the Time-of-Arrival and Time-over-Threshold information allows for a precise 3D reconstruction of the annihilation prongs. The presented results point at the potential use of the Timepix3 in antimatter-research experiments where a precise and unambiguous tagging of antiproton annihilations is required.

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Section: Introductionsupporting

confidence: 91%

“…7 shows a selection of events, produced by ∼1 keV antiprotons. The average energy of annihilation products is in the range of ∼100 MeVs [5] . At these energies, only pions are MIPs, hence it is possible to directly identify them within the observed events.…”

Section: Tagging Of Antiprotons With the Timepix3mentioning

confidence: 99%

Direct detection of antiprotons with the Timepix3 in a new electrostatic selection beamline

Pacifico

Aghion

Alozy

et al. 2016

Nuclear Instruments and Methods in Physics Research Section A:

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“…Among the possible antihydrogen detectors the best candidates seem silicon detectors with thin active volume [15], which helps to localize spatially the annihilation event through the detection of highly ionizing fragments. Time resolutions in the nanoseconds range can be achieved.…”

Section: Overview Of the Aegis Experimentsmentioning

confidence: 99%

Positronium for Antihydrogen Production in the AEGIS Experiment

et al. 2017

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“…The development of the silicon position detector included several beam test periods with different detector technologies in order to study the annihilation of low energy antiprotons in silicon, to define the design specifications and to make estimations on the position resolution of the annihilation point. The results from the beam test campaigns elaborated here have been published [11,12,13] and what follows is a summary.…”

Section: Development Of a Silicon Position Detectormentioning

confidence: 99%

“…In general, most of the annihilation events deposit energy >200 keV, up to saturation. The overall analyses and results are presented in [13].…”

Section: Silicon Microstrip Detectormentioning

confidence: 99%

Antimatter annihilation detection with AEgIS

Gligorova

2015

Proceedings of 24th International Workshop on Vertex Detectors — PoS(VERTEX2015)

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Gravity, Interferometry, Spectroscopy) is an antimatter experiment based at CERN, whose primary goal is to carry out the first direct measurement of the Earth's gravitational acceleration on antimatter. A precise measurement of antimatter gravity would be the first precision test of the Weak Equivalence Principle for antimatter. The principle of the experiment is based on the formation of antihydrogen through a charge exchange reaction between laser excited (Rydberg) positronium and ultra-cold antiprotons. The antihydrogen atoms will be accelerated by an inhomogeneous electric field (Stark acceleration) to form a pulsed cold beam. The free fall of the antihydrogen due to Earth's gravity will be measured using a moiré deflectometer and a hybrid position detector. This detector is foreseen to consist of an active silicon part, where the annihilation of antihydrogen takes place, followed by an emulsion part coupled to a fiber time-of-flight detector. This overview presents the current results from the R&D efforts for the construction of the silicon position detector. Low energy antiproton annihilations in silicon were studied in detail using different silicon sensor technologies. A first comparison between experimental data and Monte Carlo simulations for low energy antiproton annihilation is also reported, suggesting areas where the improvement of simulation models is possible. The outcome of these tests defined the basis for the final design parameters of the silicon position detector. This detector will consist of a 50 µm thick silicon strip sensor bonded to an application specific integrated circuit (ASIC) with self-triggering readout capabilities and a timing resolution in the order of µs.

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Investigation of silicon sensors for their use as antiproton annihilation detectors

Cited by 6 publications

References 10 publications

Direct detection of antiprotons with the Timepix3 in a new electrostatic selection beamline

Direct detection of antiprotons with the Timepix3 in a new electrostatic selection beamline

Positronium for Antihydrogen Production in the AEGIS Experiment

Antimatter annihilation detection with AEgIS

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