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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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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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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
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4.
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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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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
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In : 4th Jagiellonian Symposium on Advances in Particle Physics and Medicine, Kraków, Poland, 10 - 15 Jul 2022, pp.319-323
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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
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In : 18th Symmetries in Science, Bregenz, Austria, 4 - 9 Aug 2019, pp.012025
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Toward inertial sensing with a 2$^{3}$S positronium beam
/ Mariazzi, Sebastiano (Trento U. ; TIFPA-INFN, Trento) ; Caravita, Ruggero (TIFPA-INFN, Trento ; CERN) ; Doser, Michael (CERN) ; Nebbia, Giancarlo (INFN, Padua) ; Brusa, Roberto S. (TIFPA-INFN, Trento ; Trento U.)
In this work, we discuss the possibility of inertial sensing with positronium in the $2^3 S$ metastable state for the measurement of optical dipole, relativistic and gravitational forces on a purely leptonic matter-antimatter system. Starting from the characteristics of an available $2^3 S$ beam, we estimate the time necessary to measure accelerations ranging from $\sim10^5$$m/s^2$ to 9.1 $m/s^2$ with two different inertial sensitive devices: a classical moiré deflectometer and a Mach-Zehnder interferometer. [...]
arXiv:2203.02920.-
2020-04-22 - 9 p.
- Published in : Eur. Phys. J. D 74 (2020) 79
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A cryogenic tracking detector for antihydrogen detection in the AEgIS experiment
/ Amsler, C. (Stefan Meyer Inst. Subatomare Phys.) ; Antonello, M. (INFN, Milan ; Insubria U., Como) ; Belov, A. (Moscow, INR) ; Bonomi, G. (INFM, 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.) ; Comparat, D. (LAC, Orsay) et al.
We present the commissioning of the Fast Annihilation Cryogenic Tracker detector (FACT), installed around the antihydrogen production trap inside the 1 T superconducting magnet of the AEḡIS experiment. FACT is designed to detect pions originating from the annihilation of antiprotons. [...]
arXiv:2203.03055.-
2020-04-21 - 15 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 960 (2020) 163637
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