A5010236681- Atomic and Molecular Physics
- Muon and positron interactions and applications
- Particle Detector Development and Performance
- Atomic and Subatomic Physics Research
- Cold Atom Physics and Bose-Einstein Condensates
- Particle accelerators and beam dynamics
- Radiation Detection and Scintillator Technologies
- Dark Matter and Cosmic Phenomena
- Advanced Frequency and Time Standards
- Particle physics theoretical and experimental studies
- Nuclear Physics and Applications
- Quantum Mechanics and Applications
- Graphene research and applications
- Mass Spectrometry Techniques and Applications
- Advanced Chemical Physics Studies
- Quantum, superfluid, helium dynamics
- Astro and Planetary Science
- Cold Fusion and Nuclear Reactions
- Nuclear physics research studies
- Quantum and Classical Electrodynamics
- Neutrino Physics Research
- Particle Accelerators and Free-Electron Lasers
- Solid State Laser Technologies
- biodegradable polymer synthesis and properties
- Laser-induced spectroscopy and plasma
Istituto Nazionale di Fisica Nucleare, Trento Institute for Fundamental Physics And Applications
2016-2025
University of Trento
2016-2025
Jagiellonian University
2024
Stefan Meyer Institute for Subatomic Physics
2020
Austrian Academy of Sciences
2020
European Organization for Nuclear Research
2017-2019
Istituto Nazionale di Fisica Nucleare
2016
Politecnico di Milano
2016
Abstract Antihydrogen atoms with K or sub-K temperature are a powerful tool to precisely probe the validity of fundamental physics laws and design highly sensitive experiments needs antihydrogen controllable well defined conditions. We present here experimental results on production in pulsed mode which time when 90% produced is known an uncertainty ~250 ns. The source generated by charge-exchange reaction between Rydberg positronium atoms—produced via injection positron beam into...
We report on laser cooling of a large fraction positronium (Ps) in free flight by strongly saturating the 1^{3}S-2^{3}P transition with broadband, long-pulsed 243 nm alexandrite laser. The ground state Ps cloud is produced magnetic and electric field-free environment. observe two different laser-induced effects. first effect an increase number atoms after time has spent long-lived 2^{3}P states. second one-dimensional Doppler Ps, reducing cloud's temperature from 380(20) to 170(20) K....
We demonstrate the laser excitation of $n=3$ state positronium (Ps) in vacuum. A combination a specially designed pulsed slow positron beam and high-efficiency converter target was used to produce Ps. Its annihilation recorded by single-shot lifetime spectroscopy. Pulsed level at wavelength $\ensuremath{\lambda}\ensuremath{\approx}205$ nm monitored via Ps photoionization induced second intense pulse $\ensuremath{\lambda}=1064$ nm. About 15% overall emitted into vacuum excited photoionized....
We describe a system designed to re-bunch positron pulses delivered by an accumulator supplied source and Surko-trap. Positron from the are magnetically guided in 0.085 T field injected into region free of magnetic fields through μ-metal terminator. Here positrons temporally compressed, electrostatically accelerated towards porous silicon target for production emission positronium vacuum. Positrons focused spot less than 4 mm FWTM bunches ∼8 ns FWHM. Emission vacuum is shown single shot...
Abstract A powerful and robust control system is a crucial, often neglected, pillar of any modern, complex physics experiment that requires the management multitude different devices their precise time synchronisation. The AEḡIS collaboration presents CIRCUS, novel, autonomous optimised for time-critical experiments such as those at CERN’s Antiproton Decelerator and, more broadly, in atomic quantum research. Its setup based on Sinara/ARTIQ TALOS, integrating ALPACA analysis pipeline, last...
Positronium in the $2^{\phantom{\rule{0.16em}{0ex}}3}\mathrm{S}$ metastable state exhibits a low electrical polarizability and long lifetime (1140 ns), making it promising candidate for interferometry experiments with neutral matter-antimatter system. In present work, positronium is produced, absence of an electric field, via spontaneous radiative decay from $3^{\phantom{\rule{0.16em}{0ex}}3}\mathrm{P}$ level populated 205-nm UV laser pulse. Thanks to short temporal length pulse, 1.5 ns full...
In this work we report on the systematic characterization of a rare-gas moderated magnetically-transported continuous positron beam based 22Na radioactive source. The was performed with three different solid moderators: Ne, Ar, and Kr. Each moderator deposited then thermal annealed at temperature ∼ 35 % 30 lower than melting point, respectively. Tests moderation/magnetic transport efficiency apparatus have shown maximum 1.8 10-3, 2.0 10-3 0.6 for Kr, average longitudinal kinetic energy...
Antihydrogen formation at AEgIS CERN leverages charge exchange between Rydberg positronium (Ps*) and antiprotons, with cross-sections scaling the Ps principal quantum number $n^4$ inversely relative velocity $𝑣^{−2}$. However, motional Stark effect mismatch antiprotons impose stringent constraints, limiting efficiency. Advances in transmission converters mitigate self-ionization losses improve alignment, promising a significant boost antihydrogen yield. This work evaluates cross-sections,...
The experimental demonstration of positronium laser cooling with stationary broadband pulses negative detuning is briefly described. Considerations on the limits current experiment and possible future developments follow. In particular, benefit positron remoderation, use a magnetic field, polarization, pulse shaping, coherent deceleration are shortly discussed.
Primary goal of the AEḡIS experiment is to precisely measure free fall antihydrogen within Earth’s gravitational field. To this end, cold (≈50 K) will traverse a two-grid moiré deflectometer before annihilating onto position-sensitive detector, which shall determine vertical position annihilation vertex relative grids with micrometric accuracy. Here, we introduce vertexing detector based on modified mobile camera sensor and experimentally demonstrate that it can antiproton annihilations...
Producing positronium (Ps) in the metastable $2^3\text{S}$ state is of interest for various applications fundamental physics. We report here about an experiment which Ps atoms are produced this long-lived by spontaneous radiative decay excited to $3^3\text{P}$ level manifold. The cloud excitation obtained with a UV laser pulse experimental vacuum chamber presence guiding magnetic field 25 mT and average electric 300 V/cm. indication production from novel analysis technique single-shot...
Abstract We describe a multi-step “rotating wall” compression of mixed cold antiproton–electron non-neutral plasma in 4.46 T Penning–Malmberg trap developed the context AEḡIS experiment at CERN. Such traps are routinely used for preparation antiprotons suitable antihydrogen production. A tenfold antiproton radius has been achieved, with minimum only 0.17 mm. experimental conditions necessary to perform such compression: minimizing tails electron density distribution is paramount ensure that...
We characterized the pulsed Rydberg-positronium production inside Antimatter Experiment: Gravity, Interferometry, Spectroscopy ($\mathrm{AE}\overline{\text{g}}\mathrm{IS}$) apparatus in view of antihydrogen formation by means a charge exchange reaction between cold antiprotons and slow atoms. Velocity measurements on positronium along two axes cryogenic environment ($\ensuremath{\approx}10\phantom{\rule{0.16em}{0ex}}\mathrm{K}$) $1\phantom{\rule{0.16em}{0ex}}\mathrm{T}$ magnetic field were...
Abstract Nanochanneled silicon targets with high positron/positronium (Ps) conversion rate and efficient Ps cooling were produced. Morphological parameters of the nanochannels, such as their diameter length, adjusted to get a large fraction thermalized at room temperature being emitted into vacuum. measurements conducted combining single-shot positron annihilation lifetime spectroscopy Doppler 1 3 S → 2 P transition. γ –3 ratio also performed estimate positron/Ps efficiency. In converter...
The AEgIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) experiment is designed with the objective to test weak equivalence principle antimatter by studying free fall of antihydrogen in Earth's gravitational field. A pulsed cold beam will be produced charge exchange between Ps excited Rydberg state and antiprotons. Finally measured a classical moiré deflectometer. apparatus being assembled at Antiproton Decelerator CERN described, then advancements reported: positrons...
The efficient production of cold antihydrogen atoms in particle traps at CERN's Antiproton Decelerator has opened up the possibility performing direct measurements Earth's gravitational acceleration on purely antimatter bodies. goal AEgIS collaboration is to measure value
We investigate experimentally the possibility of enhancing production 23S positronium atoms by driving 13S–33P and 33P–23S transitions, overcoming natural branching ratio limitation spontaneous decay from 33P to 23S. The toward level has been efficiently stimulated a 1312.2 nm broadband IR laser pulse. dependence stimulating transition efficiency on intensity pulse measured find optimal enhancement conditions. A maximum relative increase ×(3.1±1.0) in efficiency, with respect case which only...
A magnetic transport line, a field terminator and positron buncher were designed built to focus low-energy pulses from Surko-type accumulator on porous target. The 25 electrodes buncher, which produces parabolic potential, was implant 5 ns bunches with spot of 3 mm into target held at cryogenic temperature. These will be used obtain cooled Ps clouds vacuum for laser excitation in spectroscopy experiments. By using high-voltage fast switches proper mu-metal shield the requirement form free...
Modern physics experiments are frequently very complex, relying on multiple simultaneous events to happen in order obtain the desired result. The experiment control system plays a central role orchestrating measurement setup: However, its development is often treated as secondary with respect hardware, importance becoming evident only during operational phase. Therefore, AEgIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) collaboration has created framework for easily coding...