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Coherent spectroscopy with a single antiproton spin
/ BASE Collaboration
Coherent quantum transition spectroscopy is a powerful tool in metrology, quantum information processing, magnetometry and precision tests of the standard model. It was applied with great success in proton and deuteron magnetic moment measurements, which culminated in maser spectroscopy with sub-parts-per-trillion resolution and many other experiments at the forefront of physics. [...]
2025 - 11 p.
Fulltext from Publisher: PDF; External link: Interactions.org
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Antiproton annihilation at rest in thin solid targets and comparison with Monte Carlo simulations
/ Amsler, Claude (Stefan Meyer Inst. Subatomare Phys.) ; Breuker, Horst (Wako, RIKEN) ; Bumbar, Marcus (CERN ; Vienna U.) ; Cerwenka, Matti (Stefan Meyer Inst. Subatomare Phys. ; Vienna U.) ; Costantini, Giovanni (Brescia U. ; INFN, Brescia ; INFN, Pavia) ; Ferragut, Rafael (Milan Polytechnic ; INFN, Milan ; Milan U.) ; Fleck, Markus (Stefan Meyer Inst. Subatomare Phys.) ; Giammarchi, Marco (INFN, Milan ; Milan U.) ; Gligorova, Angela (Stefan Meyer Inst. Subatomare Phys.) ; Gosta, Giulia (Brescia U. ; INFN, Brescia ; INFN, Pavia) et al.
/Asacusa AD-3
The mechanism of antiproton-nucleus annihilation at rest is not fully understood, despite substantial previous experimental and theoretical work. In this study we used slow extracted, sub-keV antiprotons from the ASACUSA apparatus at CERN to measure the charged particle multiplicities and their energy deposits from antiproton annihilations at rest on three different nuclei: carbon, molybdenum and gold. [...]
arXiv:2407.06721.-
Geneva : CERN, 2024-11-17 - 18 p.
- Published in : Eur. Phys. J. A 60 (2024) 225
Draft (restricted): PDF; Fulltext: CERN-EP-2024-182 - PDF; 2407.06721 - PDF; document - PDF;
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A 16 Parts per Trillion Comparison of the Antiproton-to-Proton q/m Ratios
/ Borchert, M.J. (RIKEN (main) ; Leibniz U., Hannover ; Braunschweig, Phys. Tech. Bund.) ; Devlin, J.A. (RIKEN (main) ; CERN) ; Erlewein, S.E. (RIKEN (main) ; CERN ; Heidelberg, Max Planck Inst.) ; Fleck, M. (RIKEN (main) ; Tokyo U., Komaba) ; Harrington, J.A. (RIKEN (main) ; Heidelberg, Max Planck Inst.) ; Higuchi, T. (RIKEN (main) ; Tokyo U., Komaba) ; Latacz, B. (RIKEN (main)) ; Voelksen, F. (RIKEN (main) ; Darmstadt, GSI) ; Wursten, E. (RIKEN (main) ; CERN ; Heidelberg, Max Planck Inst.) ; Abbass, F. (Mainz U., Inst. Phys.) et al.
The Standard Model (SM) of particle physics is both incredibly successful and glaringly incomplete. [...]
arXiv:2311.16006.
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Ultra-thin polymer foil cryogenic window for antiproton deceleration and storage
/ Latacz, B.M. (CERN ; RIKEN (main)) ; Arndt, B.P. (Heidelberg, Max Planck Inst. ; Darmstadt, GSI) ; Devlin, J.A. (CERN ; RIKEN (main)) ; Erlewein, S.R. (RIKEN (main) ; Heidelberg, Max Planck Inst.) ; Fleck, M. (RIKEN (main) ; Tokyo U., Komaba) ; Jäger, J.I. (CERN ; RIKEN (main) ; Heidelberg, Max Planck Inst.) ; Micke, P. (CERN ; RIKEN (main) ; Heidelberg, Max Planck Inst.) ; Umbrazunas, G. (RIKEN (main) ; Zurich, ETH) ; Wursten, E. (RIKEN (main)) ; Abbass, F. (Mainz U., Inst. Phys.) et al.
We present the design and characterisation of a cryogenic window based on an ultra-thin aluminised PET foil at T < 10K, which can withstand a pressure difference larger than 1bar at a leak rate < $1\times 10^{-9}$ mbar$\cdot$ l/s. Its thickness of approximately 1.7 $\mu$m makes it transparent to various types of particles over a broad energy range. [...]
arXiv:2308.12873.-
2023-10-01 - 11 p.
- Published in : Rev. Sci. Instrum. 94 (2023) 103310
Fulltext: Publication - PDF; 2308.12873 - PDF;
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Trap-integrated fluorescence detection with silicon photomultipliers for sympathetic laser cooling in a cryogenic Penning trap
/ Wiesinger, M. (Heidelberg, Max Planck Inst.) ; Stuhlmann, F. (Mainz U., Inst. Phys.) ; Bohman, M. (Heidelberg, Max Planck Inst.) ; Micke, P. (Heidelberg, Max Planck Inst. ; CERN) ; Will, C. (Heidelberg, Max Planck Inst.) ; Yildiz, H. (Mainz U., Inst. Phys.) ; Abbass, F. (Mainz U., Inst. Phys.) ; Arndt, B.P. (Heidelberg, Max Planck Inst. ; Darmstadt, GSI ; Wako, RIKEN) ; Devlin, J.A. (CERN ; Wako, RIKEN) ; Erlewein, S. (Heidelberg, Max Planck Inst. ; Wako, RIKEN) et al.
We present a fluorescence-detection system for laser-cooled 9Be+ ions based on silicon photomultipliers (SiPM) operated at 4 K and integrated into our cryogenic 1.9 T multi-Penning-trap system. Our approach enables fluorescence detection in a hermetically-sealed cryogenic Penning-trap chamber with limited optical access, where state-of-the-art detection using a telescope and photomultipliers at room temperature would be extremely difficult. [...]
arXiv:2308.02365.-
2023-12-01 - 12 p.
- Published in : Rev. Sci. Instrum. 94 (2023) 123202
Fulltext: 2308.02365 - PDF; document - PDF;
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BASE—high-precision comparisons of the fundamental properties of protons and antiprotons
/ Latacz, B M (RIKEN (main) ; CERN) ; Arndt, B P (RIKEN (main) ; Heidelberg, Max Planck Inst. ; Darmstadt, GSI) ; Bauer, B B (RIKEN (main) ; Mainz U., Inst. Phys.) ; Devlin, J A (RIKEN (main) ; CERN) ; Erlewein, S R (RIKEN (main) ; Heidelberg, Max Planck Inst.) ; Fleck, M (RIKEN (main) ; Tokyo U., Math. Sci.) ; Jäger, J I (RIKEN (main) ; CERN ; Heidelberg, Max Planck Inst.) ; Schiffelholz, M (RIKEN (main) ; Leibniz U., Hannover) ; Umbrazunas, G (RIKEN (main) ; ETH, Zurich (main)) ; Wursten, E J (RIKEN (main)) et al.
The BASE collaboration at the antiproton decelerator/ELENA facility of CERN compares the fundamental properties of protons and antiprotons with ultra-high precision. Using advanced Penning trap systems, we have measured the proton and antiproton magnetic moments with fractional uncertainties of 300 parts in a trillion (p.p.t.) and 1.5 parts in a billion (p.p.b.), respectively [...]
2023 - 8 p.
- Published in : Eur. Phys. J. D 77 (2023) 94
Fulltext: PDF;
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BASE-STEP: A transportable antiproton reservoir for fundamental interaction studies
/ Smorra, C. (Mainz U., Inst. Phys. ; Wako, RIKEN) ; Abbass, F. (Mainz U., Inst. Phys.) ; Schweitzer, D. (Mainz U., Inst. Phys.) ; Bohman, M. (Wako, RIKEN ; Heidelberg, Max Planck Inst.) ; Dutheil, Y. (CERN) ; Hobl, A. (Babcock Noell, Wuerzburg) ; Popper, D. (Mainz U., Inst. Phys.) ; Arndt, B. (Wako, RIKEN ; Heidelberg, Max Planck Inst. ; Darmstadt, GSI) ; Bauer, B.B. (Mainz U., Inst. Phys. ; Wako, RIKEN) ; Devlin, J.A. (Wako, RIKEN ; CERN) et al.
Currently, the only worldwide source of low-energy antiprotons is the AD/ELENA facility located at CERN. To date, all precision measurements on single antiprotons have been conducted at this facility and provide stringent tests of the fundamental interactions and their symmetries. [...]
arXiv:2304.09555.-
2023-11-01 - 14 p.
- Published in : Rev. Sci. Instrum. 94 (2023) 113201
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A high-Q superconducting toroidal medium frequency detection system with a capacitively adjustable frequency range >180 kHz
/ Völksen, F (RIKEN (main) ; Darmstadt, GSI) ; Devlin, J A (RIKEN (main) ; CERN) ; Borchert, M J (RIKEN (main) ; Leibniz U., Hannover ; Bucharest U.) ; Erlewein, S R (RIKEN (main) ; Heidelberg, Max Planck Inst.) ; Fleck, M (RIKEN (main) ; Tokyo U., Math. Sci.) ; Jäger, J I (RIKEN (main) ; CERN ; Heidelberg, Max Planck Inst.) ; Latacz, B M (RIKEN (main) ; Heidelberg, Max Planck Inst.) ; Micke, P (RIKEN (main) ; CERN) ; Nuschke, P (RIKEN (main) ; Leibniz U., Hannover) ; Umbrazunas, G (RIKEN (main) ; ETH, Zurich (main)) et al.
We describe a newly developed polytetrafluoroethylene/copper capacitor driven by a cryogenic piezoelectric slip-stick stage and demonstrate with the chosen layout cryogenic capacitance tuning of ≈60 pF at ≈10 pF background capacitance. Connected to a highly sensitive superconducting toroidal LC circuit, we demonstrate tuning of the resonant frequency between 345 and 685 kHz, at quality factors Q > 100 000. [...]
2022 - 6 p.
- Published in : Rev. Sci. Instrum. 93 (2022) 093303
Fulltext: PDF;
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