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Development of a Position-Sensitive Detector for Positronium Inertial Sensing Measurements
/ Mariazzi, S (Trento U. ; TIFPA-INFN, Trento) ; Caravita, R (TIFPA-INFN, Trento) ; Glöggler, L (CERN ; Berlin, Tech. U.) ; Povolo, L (Trento U. ; TIFPA-INFN, Trento) ; Penasa, L (Trento U. ; TIFPA-INFN, Trento) ; Sharma, S (TIFPA-INFN, Trento ; Jagiellonian U. ; Jagiellonian U. (main)) ; Moskal, P (Jagiellonian U. ; Jagiellonian U. (main)) ; Brusa, R S (Trento U. ; TIFPA-INFN, Trento)
In the last twenty years, both free fall and interferometry/deflectometry experiments have been proposed for the measurement of the gravitational acceleration on positronium, which is a purely leptonic matter-antimatter atom formed by an electron and its antiparticle (positron). Among the several challenges posed by these experiments is the development of position-sensitive detectors to measure the deflection of positronium in the Earth's gravitational field. [...]
2022 - 5 p.
- Published in : Acta Phys. Pol. A 142 (2022) 319-323
Fulltext: PDF;
In : 4th Jagiellonian Symposium on Advances in Particle Physics and Medicine, Kraków, Poland, 10 - 15 Jul 2022, pp.319-323
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2.
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A low cost 2/3 of 4 $\pi$ detector for the study of Ps decay
/ Pino, F (INFN, Legnaro ; Padua U.) ; Fontana, C L (Padua U. ; INFN, Padua) ; Lunardon, M (Padua U. ; INFN, Padua) ; Moretto, S (Padua U. ; INFN, Padua) ; Stevanato, L (Padua U. ; INFN, Padua) ; Brusa, R (Trento U. ; TIFPA-INFN, Trento) ; Caravita, R (CERN) ; Mariazzi, S (Trento U. ; TIFPA-INFN, Trento) ; Penasa, L (Trento U. ; TIFPA-INFN, Trento) ; Povolo, L (Trento U. ; TIFPA-INFN, Trento) et al.
A large area low-cost detector for detailed studies of ortho-Positronium formation and decay is being designed. The detector will be made of four modules each consisting of a thin slab of YAP(Ce) scintillator read out by a multi-anode flat panel photomultiplier tube. [...]
2019 - 6 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 942 (2019) 162416
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3.
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A ∼100 μm-resolution position-sensitive detector for slow positronium
/ Amsler, C (Stefan Meyer Inst. Subatomare Phys.) ; Antonello, M (INFN, Milan ; Insubria U., Como) ; Belov, A (Moscow, INR) ; Bonomi, G (U. Brescia ; INFN, Pavia) ; Brusa, R S (Trento U. ; TIFPA-INFN, Trento) ; Caccia, M (INFN, Milan ; Insubria U., Como) ; Camper, A (CERN) ; Caravita, R (CERN) ; Castelli, F (INFN, Milan ; Milan U.) ; Cerchiari, G (Heidelberg, Max Planck Inst.) et al.
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. [...]
2019 - 5 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 457 (2019) 44-48
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4.
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Method for measuring positron number in high intensity nanosecond positron bunches based on Poisson statistic
/ Rienäcker, B (CERN) ; Mariazzi, S (Trento U. ; TIFPA-INFN, Trento) ; Povolo, L (Trento U. ; TIFPA-INFN, Trento) ; Guatieri, F (Tech. U., Munich (main) ; Trento U.) ; Caravita, R (TIFPA-INFN, Trento) ; Penasa, L (Trento U. ; TIFPA-INFN, Trento) ; Pino, F (U. Padua, Dept. Phys. Astron.) ; Nebbia, G (INFN, Padua) ; Brusa, R S (Trento U. ; TIFPA-INFN, Trento)
A novel method for the measurement of the number of positrons contained in intense positron bunches is presented. The technique is based on the Poisson distribution of the number of gamma rays emitted by many simultaneous positron–electron annihilations in a small solid angle. [...]
2022 - 5 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1033 (2022) 166661
Publication: PDF;
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5.
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Techniques for Production and Detection of $2^3S$ Positronium
/ Mariazzi, S (Trento U. ; TIFPA-INFN, Trento) ; Caravita, R (CERN) ; Vespertini, A (Trento U.) ; Camper, A (CERN) ; Rienacker, B (CERN) ; Brusa, R S (Trento U. ; TIFPA-INFN, Trento) ; Antonello, M (INFN, Milan ; Insubria U., Como) ; Belov, A (Moscow, INR) ; Bonomi, G (Brescia U. ; INFN, Pavia) ; Caccia, M (INFN, Milan ; INFM, Como) et al.
In this work, we show recent measurements of $2^{3}S$ long-lived positronium production via spontaneous decay from the 3 3P level. The possibility to tune the velocity of the $2^{3}S$ positronium, excited following this scheme, is presented [...]
2020 - 5 p.
- Published in : Acta Phys. Pol. A 137 (2020) 91-95
Fulltext: PDF;
In : 15th International Workshop on Slow Positron Beam Techniques and Applications, Prague, Czechia, 2-6 Sep 2019, pp.91-95
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6.
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Forward emission of positronium from nanochanneled silicon membranes
/ Mariazzi, S (Trento U. ; TIFPA-INFN, Trento) ; Rienäcker, B (CERN) ; Magrin Maffei, R (U. Modena (main) ; CNR NANO) ; Povolo, L (Trento U. ; TIFPA-INFN, Trento) ; Sharma, S (TIFPA-INFN, Trento) ; Caravita, R (TIFPA-INFN, Trento) ; Penasa, L (Trento U. ; TIFPA-INFN, Trento) ; Bettotti, P (Trento U.) ; Doser, M (CERN) ; Brusa, R S
Positronium beam formation and manipulation are required in several fundamental experiments. Efficient positron/positronium conversion in transmission configuration would offer important geometrical advantages over the reflection one for these applications. [...]
2022 - 14 p.
- Published in : Phys. Rev. B 105 (2022) 115422
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7.
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A fiber detector to monitor ortho-Ps formation and decay
/ Rienäcker, Benjamin (CERN) ; Brusa, Roberto Sennen (U. Trento (main) ; TIFPA-INFN, Trento) ; Caravita, Ruggero (TIFPA-INFN, Trento) ; Mariazzi, Sebastiano (TIFPA-INFN, Trento) ; Penasa, L. (Trento U. ; TIFPA-INFN, Trento) ; Pino, Felix (U. Padua, Dept. Phys. Astron.) ; Ranum, Oline Aas (U. Amsterdam, GRAPPA) ; Nebbia, Giancarlo (INFN, Padua)
We describe a novel method to use a scintillating fiber detector similar to the Fast Annihilation Cryogenic Tracking (FACT) used at the antimatter experiment AE$\bar{g}$IS to monitor the presence of ortho-positronium. A single scintillating fiber was coupled to a photomultiplier tube and irradiated by flashes of about 6 x 10$^{6}$ 511 keV $\gamma$-rays produced by $\approx10\,\text{ns}$ long positron pulses. [...]
arXiv:2111.01503.-
2022-03-11 - 6 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1027 (2022) 166275
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8.
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Probing antimatter gravity – The AEGIS experiment at CERN
/ Kellerbauer, A (Heidelberg, Max Planck Inst.) ; Aghion, S (Milan Polytechnic ; INFN, Milan) ; Amsler, C (Bern U., LHEP) ; Ariga, A (Bern U., LHEP) ; Ariga, T (Bern U., LHEP) ; Bonomi, G (INFM, Brescia ; INFN, Pavia) ; Bräunig, P (Kirchhoff Inst. Phys.) ; Bremer, J (CERN) ; Brusa, R S (INFN, Padua ; Trento U. ; TIFPA-INFN, Trento) ; Cabaret, L (CSNSM, Orsay) et al.
/AEGIS
The weak equivalence principle states that the motion of a body in a gravitational field is independent of its structure or composition. This postulate of general relativity has been tested to very high precision with ordinary matter, but no relevant experimental verification with antimatter has ever been carried out. [...]
2016 - 10 p.
- Published in : EPJ Web Conf. 126 (2016) 02016
Fulltext: PDF;
In : 4th International Conference on New Frontiers in Physics, Kolymbari, Greece, 23 - 30 Aug 2015, pp.02016
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Protocol for pulsed antihydrogen production in the AE$\overline{g}$IS apparatus
/ Tietje, I C (CERN ; Berlin, Tech. U.) ; Amsler, C (Stefan Meyer Inst. Subatomare Phys.) ; Antonello, M (Insubria U., Como ; INFN, Milan) ; Belov, A (Moscow, INR) ; Bonomi, G (INFM, Brescia ; INFN, Pavia) ; Brusa, R S (Trento U. ; TIFPA-INFN, Trento) ; Caccia, M (Insubria U., Como ; INFN, Milan) ; Camper, A (CERN) ; Caravita, R (TIFPA-INFN, Trento) ; Castelli, F (INFN, Milan ; Milan U.) et al.
The AEḡIS collaboration’s main goal is to measure the acceleration of antihydrogen it ($\textit{H}$) due to gravity. The experimental scheme is to form a pulsed beam whose vertical deflection is then measured by means of a moiré deflectometer [1]. [...]
2020 - 12 p.
- Published in : J. Phys.: Conf. Ser. 1612 (2020) 012025
Fulltext: PDF;
In : 18th Symmetries in Science, Bregenz, Austria, 4 - 9 Aug 2019, pp.012025
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