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CERN Document Server 8 records found  Search took 0.94 seconds. 
1.
Upgrade of the positron system of the ASACUSA-Cusp experiment / Lanz, A. (Stefan Meyer Inst. Subatomare Phys. ; Vienna U.) ; Amsler, C. (Stefan Meyer Inst. Subatomare Phys.) ; Breuker, H. (Wako, RIKEN) ; Bumbar, M. (Stefan Meyer Inst. Subatomare Phys.) ; Chesnevskaya, S. (Stefan Meyer Inst. Subatomare Phys.) ; Costantini, G. (Brescia U. ; INFN, Pavia) ; Ferragut, R. (Milan, Polytech.) ; Giammarchi, M. (INFN, Milan) ; Gligorova, A. (Stefan Meyer Inst. Subatomare Phys.) ; Gosta, G. (Brescia U. ; INFN, Pavia) et al.
The ASACUSA-Cusp collaboration has recently upgraded the positron system to improve the production of antihydrogen. [...]
arXiv:2307.06133. - 10 p.
Fulltext
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2.
Slow positron production and storage for the ASACUSA-Cusp experiment / ASACUSA Collaboration
The ASACUSA Cusp experiment requires the production of dense positron plasmas with a high repetition rate to produce a beam of antihydrogen. In this work, details of the positron production apparatus used for the first observation of the antihydrogen beam, and subsequent measurements are described in detail [...]
arXiv:2306.12707.- 2023-12-18 - 9 p. - Published in : J. Plasma Phys. 89 (2023) 905890608 Fulltext: PDF;
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3.
Upgrade of the scintillating bars detector for the ASACUSA experiment / Costantini, Giovanni (Brescia U. ; INFN, Pavia) ; Giorleo, Luca (Brescia U.) ; Gosta, Giulia (Brescia U. ; INFN, Pavia) ; Leali, Marco (Brescia U. ; INFN, Pavia) ; Mascagna, Valerio (Brescia U. ; INFN, Pavia) ; Migliorati, Stefano (Brescia U. ; INFN, Pavia) ; Prest, Michela (Catania U. ; INFN, Milan Bicocca) ; Ronchetti, Federico (Catania U. ; INFN, Milan Bicocca) ; Solazzi, Luigi (Brescia U. ; INFN, Pavia) ; Vallazza, Erik (INFN, Milan Bicocca) et al.
The upgrade of the scintillating bars detector, used in the experiments of the ASACUSA Collaboration at the CERN Antiproton Decelerator is presented. The detector consists of several modules, each one made of ≈1m long scintillating bars, which allow the detection of the charged particles produced in the annihilations of antiprotons and antihydrogens. [...]
2022 - 5 p. - Published in : EPJ Web Conf. 262 (2022) 01013 Fulltext: PDF;
In : 7th International Conference on Exotic Atoms and Related Topics, Online, 13 - 17 Sep 2021, pp.01013
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4.
In-Beam Hyperfine Spectroscopy of Antihydrogen, Hydrogen, and Deuterium / Widmann, E. (Stefan Meyer Inst. Subatomare Phys.) /ASACUSA Collaboration
The ASACUSA collaboration is developing a polarized beam of antihydrogen atoms to precisely determine the ground-state hyperfine structure for studies of CPT and Lorentz invariance. Using a beam of ordinary hydrogen, measurements of both the $\sigma$ and $\pi$-transition have been performed, investigating orientation-dependent SME coefficients. [...]
arXiv:2212.13083.- 2023 - 5 p. - Published in : 10.1142/9789811275388_0008 Fulltext: PDF; External link: Preprint
In : 9th Meeting on CPT and Lorentz Symmetry, Bloomington, IN, United States, 17 - 26 May 2022, pp.34-38
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5.
Large nuclear scattering effects in antiproton transmission through polymer and metal-coated foils / Nordlund, K (Helsinki U. ; Helsinki Inst. of Phys.) ; Hori, Masaki (Hannover, Max Planck Inst. Quantenopt. ; Munich U.) ; Sundholm, D (U. Helsinki (main))
We simulate the deceleration and transmission of antiprotons with keV-scale kinetic energies through polymer foils using a molecular dynamics approach, which includes a model of nuclear stopping based on the attractive interaction potentials between antiprotons and target atoms calculated by quantum chemical methods. Antiprotons scatter into larger angles with higher cross sections than protons. [...]
2022 - 19 p. - Published in : Phys. Rev. A 106 (2022) 012803
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6.
Reducing the background temperature for cyclotron cooling in a cryogenic Penning–Malmberg trap / Amsler, C (Stefan Meyer Inst. Subatomare Phys.) ; Breuker, H (Wako, RIKEN) ; Chesnevskaya, S (Stefan Meyer Inst. Subatomare Phys.) ; Costantini, G (Brescia U. ; INFN, Pavia) ; Ferragut, R (INFN, Milan ; Milan U.) ; Giammarchi, M (INFN, Milan ; Milan U.) ; Gligorova, A (Stefan Meyer Inst. Subatomare Phys.) ; Gosta, G (Brescia U. ; INFN, Pavia) ; Higaki, H (Hiroshima U.) ; Hunter, E D (Stefan Meyer Inst. Subatomare Phys.) et al.
Magnetized nonneutral plasma composed of electrons or positrons couples to the local microwave environment via cyclotron radiation. The equilibrium plasma temperature depends on the microwave energy density near the cyclotron frequency. [...]
2022 - 13 p. - Published in : Phys. Plasmas 29 (2022) 083303 Fulltext: PDF;
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7.
Upgrade of ASACUSA's Antihydrogen Detector / Kraxberger, V. (Stefan Meyer Inst. Subatomare Phys.) ; Amsler, C. (Stefan Meyer Inst. Subatomare Phys.) ; Breuker, H. (Wako, RIKEN) ; Chesnevskaya, S. (Stefan Meyer Inst. Subatomare Phys.) ; Costantini, G. (Brescia U. ; INFN, Pavia) ; Ferragut, R. (Milan, Polytech. ; INFN, Milan ; Milan U.) ; Giammarchi, M. (INFN, Milan ; Milan U.) ; Gligorova, A. (Stefan Meyer Inst. Subatomare Phys.) ; Gosta, G. (Brescia U. ; INFN, Pavia) ; Higaki, H. (Hiroshima U.) et al.
The goal of the ASACUSA (Atomic Spectroscopy And Collisions Using Slow Antiprotons) CUSP experiment at CERN's Antiproton Decelerator is to measure the ground state hyperfine splitting of antihydrogen in order to test whether CPT invariance is broken. The ASACUSA hodoscope is a detector consisting of two layers of 32 plastic scintillator bars individually read out by two serially connected silicon photo multipliers (SiPMs) on each end. [...]
arXiv:2204.11572.- 2023-01-01 - 3 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 1045 (2023) 167568 Fulltext: 2204.11572 - PDF; Publication - PDF;
In : Vienna Conference on Instrumentation (VCI 2022), Online, Austria, 21 - 25 Feb 2022
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8.
High-resolution laser resonances of antiprotonic helium in superfluid $^{4}$He / Sótér, Anna (Munich, Max Planck Inst. Quantenopt. ; Zurich, ETH) ; Aghai-Khozani, Hossein (Munich, Max Planck Inst. Quantenopt.) ; Barna, Dániel (CERN ; Wigner RCP, Budapest) ; Dax, Andreas (CERN ; PSI, Villigen) ; Venturelli, Luca (U. Brescia ; INFN, Pavia) ; Hori, Masaki (Munich, Max Planck Inst. Quantenopt. ; Munich U.)
When atoms are placed into liquids, their optical spectral lines corresponding to the electronic transitions are greatly broadened compared to those of single, isolated atoms. This linewidth increase can often reach a factor of more than a million, obscuring spectroscopic structures and preventing high-resolution spectroscopy, even when superfluid helium, which is the most transparent, cold and chemically inert liquid, is used as the host material. [...]
2022 - 14 p. - Published in : Nature 603 (2022) 411-415 Fulltext: PDF; External link: Interactions.org article
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