AEgIS Project

 

You can find the lastest results of the project in:

  • Development of nuclear emulsions operating in vacuum for the AEgIS experiment

    P. Scampoli, S. Aghion, O. Ahlen et al. Group Author(s): AEgIS Collaboration
    HD-KIP 18-116, 2018, JOURNAL OF INSTRUMENTATION (9)
  • AEgIS experiment: Towards antihydrogen beam production for antimatter gravity measurements

    S. Mariazzi, S. Aghion, C. Amsler et al. Group Author(s): AEgIS Collaboration
    HD-KIP 18-112, 2018, EUROPEAN PHYSICAL JOURNAL D (68)
  • Investigation of silicon sensors for their use as antiproton annihilation detectors

    N. Pacifico, S. Aghion, O. Ahlén et al. Group Author(s): AEgIS Collaboration
    HD-KIP 18-120, 2018, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT (765)
  • Comparison of Planar and 3D Silicon Pixel Sensors Used for Detection of Low Energy Antiproton

    A. Gligorova, Member, IEEE, S. Aghion, et al. Group Author(s): AEgIS Collaboration
    HD-KIP 18-119, 2018, IEEE TRANSACTIONS ON NUCLEAR SCIENCE (61)
  • Positron bunching and electrostatic transport system for the production and emission of dense positronium clouds into vacuum

    S. Aghion, C. Amsler, A. Ariga et al. Group Author(s): AEgIS Collaboration
    HD-KIP 18-118, 2018, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS (362)
  • Particle tracking at cryogenic temperatures: the Fast Annihilation Cryogenic Tracking (FACT) detector for the AEgIS antimatter gravity experiment

    J. Storey, S. Aghion, C. Amsler et al. Group Author(s): AEgIS Collaboration
    HD-KIP 18-117, 2018, JOURNAL OF INSTRUMENTATION (10)
  • Direct detection of antiprotons with the Timepix3 in a new electrostatic selection beamline

    N. Pacifico, S. Aghion, J. Alozy et al. Group Author(s): AEgIS Collaboration
    HD-KIP 18-115, 2018, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT (831)
  • Measurement of antiproton annihilation on Cu, Ag and Au with emulsion films

    S. Aghion, C. Amsler, A. Ariga et al. Group Author(s): AEgIS Collaboration
    HD-KIP 18-114, 2018, JOURNAL OF INSTRUMENTATION (12) PDF-File
  • Characterization of a transmission positron/positronium converter for antihydrogen production

    S. Aghion, C. Amsler, T. Ariga et al. Group Author(s): AEgIS Collaboration
    HD-KIP 18-113, 2018, NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS (407)
  • Advances in PS manipulations and laser studies in the AEgIS Experiment

    R. Caravita, S. Aghion, C. Amsler et al. Group Author(s): AEgIS Collaboration
    HD-KIP 18-110, 2018, ACTA PHYSICA POLONICA B (48)
  • AEgIS at ELENA: outlook for physics with a pulsed cold antihydrogen beam

    M. Doser, S. Aghion, C. Amsler et al. Group Author(s): AEgIS Collaboration
    HD-KIP 18-108, 2018, PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES (376)
  • Compression of a mixed antiproton and electron non-neutral plasma to high densities

    S. Aghion, C. Amsler, G. Bonomi et al. Group Authors(s): AEgIS Collaboration
    HD-KIP 18-106, 2018, EUROPEAN PHYSICAL JOURNAL D (72)
  • Antiproton tagging and vertex fitting in a Timepix3 detector

    S. Aghion, C. Amsler, M. Antonello et al. Group Author(s): AEgIS Collaboration
    HD-KIP 18-107, 2018, Journal of Instrumentation (13)
  • Progress toward a large-scale ion Talbot-Lau interferometer

    A. Demetrio, S. R. Müller, P. Lansonneur and M. K. Oberthaler
    HD-KIP 17-127, 2017, Physical Review A (96) 063604 PDF-File

    The Talbot-Lau interferometer is a proven tool to perform measurements in the near-field regime. It has been extensively used for investigating the wave nature of electrons, atoms, and complex organic molecules. However, when designing devices with high geometrical acceptances, which would be desirable when dealing with low-intensity sources of particles, the alignment requirements become much more stringent. Furthermore, if the particles are charged, the influence of external fields becomes quickly non-negligible when increasing the length of the device. This paper focuses on both the geometric and physical constraints of an ion Talbot-Lau interferometer, with emphasis on the scaling of such constraints with the size of the device. Mathematical formulas which set limits on the critical parameters are derived and applied to a test setup for protons.

  • Probing electric and magnetic fields with a Moiré deflectometer

    P. Lansonneur, P. Bräunig, A. Demetrio , S.R. Müller, P. Nedelec, M.K. Oberthaler
    HD-KIP 17-46, 2017, NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH A (862) 49-53 PDF-File

    A new contact-free approach for measuring simultaneously electric and magnetic field is reported, which considers the use of a low energy ion source, a set of three transmission gratings and a position sensitive detector. Recently tested with antiprotons (Aghion et al., 2014) [1] at the CERN Antiproton Decelerator facility, this paper extends the proof of principle of a moiré deflectometer (Oberthaler et al., 1996) [2] for distinguishing electric from magnetic fields and opens the route to precision measurements when one is not limited by the ion source intensity. The apparatus presented, whose resolution is mainly limited by the shot noise is able to measure fields as low as 9 mVm−1 Hz−1/2 for electric component and 100 μG Hz−1/2 for the magnetic component. Scaled to 100 nm pitch for the gratings, accessible with current state-of-the-art technology [3], the moiré fieldmeter would be able to measure fields as low as 22 μVm−1 Hz−1/2 and 0.2 μG Hz−1/2.

  • Laser excitation of the n=3 level of positronium for antihydrogen production

    AEGIS Collaboration
    HD-KIP 16-61, 2016, Physical Review A (94) 012507

    We demonstrate the laser excitation of the n=3 state of positronium (Ps) in vacuum. A combination of a specially designed pulsed slow positron beam and a high-efficiency converter target was used to produce Ps. Its annihilation was recorded by single-shot positronium annihilation lifetime spectroscopy. Pulsed laser excitation of the n=3 level at a wavelength λ≈205 nm was monitored via Ps photoionization induced by a second intense laser pulse at λ=1064 nm. About 15% of the overall positronium emitted into vacuum was excited to n=3 and photoionized. Saturation of both the n=3 excitation and the following photoionization was observed and explained by a simple rate equation model. The positronium's transverse temperature was extracted by measuring the width of the Doppler-broadened absorption line. Moreover, excitation to Rydberg states n=15 and 16 using n=3 as the intermediate level was observed, giving an independent confirmation of excitation to the 3P3 state.

  • Development of nuclear emulsions with 1 μm spatial resolution for the \AEgIS\ experiment

    AEGIS Collaboration
    HD-KIP 13-126, 2013, "Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment " ("732") "325 - 329"

    The main goal of the \{AEgIS\} experiment at \{CERN\} is to test the weak equivalence principle for antimatter. We will measure the Earth's gravitational acceleration g ¯ with antihydrogen atoms being launched in a horizontal vacuum tube and traversing a moiré deflectometer. We intend to use a position sensitive device made of nuclear emulsions (combined with a time-of-flight detector such as silicon μ - strips ) to measure precisely their annihilation points at the end of the tube. The goal is to determine g ¯ with a 1% relative accuracy. In 2012 we tested emulsion films in vacuum and at room temperature with low energy antiprotons from the \{CERN\} antiproton decelerator. First results on the expected performance for \{AEgIS\} are presented

  • Particle tracking at 4 K: The Fast Annihilation Cryogenic Tracking (FACT) detector for the \AEgIS\ antimatter gravity experiment

    J. Storey and C. Canali and S. Aghion et al. Group Authors(s): AEgIS Collaboration
    HD-KIP 13-125, 2013, "Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment " ("732") "437 - 441"

    "Abstract The \{AEgIS\} experiment is an international collaboration with the main goal of performing the first direct measurement of the Earth's gravitational acceleration on antimatter. Critical to the success of \{AEgIS\} is the production of cold antihydrogen ( H ¯ ) atoms. The \{FACT\} detector is used to measure the production and temperature of the H ¯ atoms and for establishing the formation of a H ¯ beam. The operating requirements for this detector are very challenging: it must be able to identify each of the thousand or so annihilations in the 1 ms period of pulsed H ¯ production, operate at 4 K inside a 1 T solenoidal field and not produce more than 10 W of heat. The \{FACT\} detector consists of two concentric cylindrical layers of 400 scintillator fibres with a 1 mm diameter and a 0.6 mm pitch. The scintillating fibres are coupled to clear fibres which transport the scintillation light to 800 silicon photomultipliers. Each silicon photomultiplier signal is connected to a linear amplifier and a fast discriminator, the outputs of which are sampled continuously by Field Programmable Gate Arrays (FPGAs). In the course of the developments for the \{FACT\} detector we have established the performance of scintillating fibres at 4 K by means of a cosmic-ray tracker operating in a liquid helium cryostat. The \{FACT\} detector was installed in the \{AEgIS\} apparatus in December 2012 and will be used to study the H ¯ formation when the low energy antiproton physics programs resume at \{CERN\} in the Summer of 2014. This paper presents the design requirements and construction methods of the \{FACT\} detector and provides the first results of the detector commissioning. "

  • AEgIS experiment commissioning at CERN

    D. Krasnický and S. Aghion and C. Amsler et al. Group Authors(s): AEgIS Collaboration
    HD-KIP 13-124, 2013, AIP Conference Proceedings (1521) 144-153
  • Prospects for measuring the gravitational free-fall of antihydrogen with emulsion detectors

    AEGIS Collaboration
    HD-KIP 13-123, 2013, Journal of Instrumentation (8) P08013 PDF-File

    The main goal of the AEgIS experiment at CERN is to test the weak equivalence principle for antimatter. AEgIS will measure the free-fall of an antihydrogen beam traversing a moir'e deflectometer. The goal is to determine the gravitational acceleration ##IMG## [http://ej.iop.org/icons/Entities/barg.gif] {bar g} with an initial relative accuracy of 1% by using an emulsion detector combined with a silicon μ-strip detector to measure the time of flight. Nuclear emulsions can measure the annihilation vertex of antihydrogen atoms with a precision of ~ 1–2 μm r.m.s. We present here results for emulsion detectors operated in vacuum using low energy antiprotons from the CERN antiproton decelerator. We compare with Monte Carlo simulations, and discuss the impact on the AEgIS project.

  • Exploring the WEP with a pulsed cold beam of antihydrogen

    AEGIS Collaboration
    HD-KIP 12-149, 2012, Classical and Quantum Gravity (29) 184009

    The AEGIS experiment, currently being set up at the Antiproton Decelerator at CERN, has the objective of studying the free fall of antimatter in the Earth’s gravitational field by means of a pulsed cold atomic beam of antihydrogen atoms. Both duration of free fall and vertical displacement of the horizontally emitted atoms will be measured, allowing a first test of the WEP with antimatter.

  • Antihydrogen physics: gravitation and spectroscopy in AEgIS

    AEGIS Collaboration
    HD-KIP 11-204, 2011, Canadian Journal of Physics (89) 17-24
 
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Funding:
DFG: Systematische Verbesserung von Atom Trap Trace Anlaysis für 39Ar und deren Anwendung zur Erstellung einer tausendjährigen Paläotemperaturzeitreihe aus Grundwasser
DFG: ArTTA-10mL: Ein Instrument für die 39Ar-Datierung von kleinen Eis- und Wasserproben
ERC Advanced Grant-Horizon 2020: EntangleGen- Entanglement Generation in Universal Quantum Dynamics
DFG: Test des schwachen Äquivalenzprinzips mit Antimaterie