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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: 2308.12873 - PDF; Publication - PDF;
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2.
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Constraints on the Coupling between Axionlike Dark Matter and Photons Using an Antiproton Superconducting Tuned Detection Circuit in a Cryogenic Penning Trap
/ Devlin, Jack A. (Wako, RIKEN ; CERN) ; Borchert, Matthias J. (Wako, RIKEN ; Braunschweig, Phys. Tech. Bund. ; Leibniz U., Hannover) ; Erlewein, Stefan (Wako, RIKEN ; CERN) ; Fleck, Markus (Wako, RIKEN ; Tokyo U., Komaba) ; Harrington, James A. (Wako, RIKEN ; Heidelberg, Max Planck Inst.) ; Latacz, Barbara (Wako, RIKEN) ; Warncke, Jan (Wako, RIKEN) ; Wursten, Elise (Wako, RIKEN ; CERN) ; Bohman, Matthew A. (Wako, RIKEN ; Heidelberg, Max Planck Inst.) ; Mooser, Andreas H. (Wako, RIKEN ; Heidelberg, Max Planck Inst.) et al.
We constrain the coupling between axionlike particles (ALPs) and photons, measured with the superconducting resonant detection circuit of a cryogenic Penning trap. By searching the noise spectrum of our fixed-frequency resonant circuit for peaks caused by dark matter ALPs converting into photons in the strong magnetic field of the Penning-trap magnet, we are able to constrain the coupling of ALPs with masses around $2.7906-2.7914\,\textrm{neV/c}^2$ to $g_{a\gamma}< 1 \times 10^{-11}\,\textrm{GeV}^{-1}$. [...]
arXiv:2101.11290.-
2021-01-26 - 7 p.
- Published in : Phys. Rev. Lett. 126 (2021) 041301
Fulltext: 2101.11290 - PDF; PhysRevLett.126 - PDF;
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3.
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Sympathetic cooling schemes for separately trapped ions coupled via image currents
/ Will, C. (Heidelberg, Max Planck Inst.) ; Bohman, M. (Heidelberg, Max Planck Inst. ; Wako, RIKEN) ; Driscoll, T. (Texas U.) ; Wiesinger, M. (Heidelberg, Max Planck Inst. ; Wako, RIKEN) ; Abbass, F. (Mainz U., Inst. Phys.) ; Borchert, M.J. (Wako, RIKEN ; Leibniz U., Hannover ; Braunschweig, Phys. Tech. Bund.) ; Devlin, J.A. (Wako, RIKEN ; CERN) ; Erlewein, S. (Wako, RIKEN ; CERN) ; Fleck, M. (Wako, RIKEN ; Tokyo U.) ; Latacz, B. (Wako, RIKEN) et al.
Cooling of particles to mK-temperatures is essential for a variety of experiments with trapped charged particles. However, many species of interest lack suitable electronic transitions for direct laser cooling. [...]
arXiv:2112.04818.-
2022-03-17 - 19 p.
- Published in : New J. Phys. 24 (2022) 033021
Fulltext: 2112.04818 - PDF; document - PDF;
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4.
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Observation of individual spin quantum transitions of a single antiproton
/ Smorra, Christian (Wako, RIKEN ; CERN) ; Mooser, A. (Wako, RIKEN) ; Besirli, M. (Wako, RIKEN) ; Bohman, M. (Wako, RIKEN ; Heidelberg, Max Planck Inst.) ; Borchert, M.J. (Wako, RIKEN ; Leibniz U., Hannover) ; Harrington, J. (Heidelberg, Max Planck Inst.) ; Higuchi, T. (Wako, RIKEN ; Tokyo U., Komaba) ; Nagahama, H. (Wako, RIKEN ; Tokyo U., Komaba) ; Schneider, G.L. (Mainz U., Inst. Phys.) ; Sellner, S. (Wako, RIKEN) et al.
We report on the detection of individual spin quantum transitions of a single trapped antiproton in a Penning trap. The spin-state determination, which is based on the unambiguous detection of axial frequency shifts in presence of a strong magnetic bottle, reaches a fidelity of 92.1$\%$. [...]
arXiv:1703.07096.-
2017-06-10 - 6 p.
- Published in : Phys. Lett. B 769 (2017) 1-6
Article from SCOAP3: PDF; Fulltext: PDF;
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5.
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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: document - PDF; 2308.02365 - PDF;
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8.
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A reservoir trap for antiprotons
/ BASE Collaboration
We have developed techniques to extract arbitrary fractions of antiprotons from an accumulated reservoir, and to inject them into a Penning-trap system for high-precision measurements. In our trap-system antiproton storage times > 1.08 years are estimated. [...]
arXiv:1507.04147.-
2015-08-17 - 4 p.
- Published in : Int. J. Mass Spectrometry 389 (2015) 10–13
Fulltext: PDF; External link: Preprint
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9.
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The magnetic moments of the proton and the antiproton
/ BASE Collaboration
Recent exciting progress in the preparation and manipulation of the motional quantum states of a single trapped proton enabled the first direct detection of the particle's spin state. Based on this success the proton magnetic moment $\mu_p$ was measured with ppm precision in a Penning trap with a superimposed magnetic field inhomogeneity. [...]
arXiv:1402.1806.-
2014-04-10 - 7 p.
- Published in : J. Phys.: Conf. Ser. 488 (2014) 012033
Fulltext: jpconf14_488_012033 - PDF; arXiv:1402.1806 - PDF;
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10.
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Highly sensitive superconducting circuits at ∼700 kHz with tunable quality factors for image-current detection of single trapped antiprotons
/ Nagahama, H. (Wako, RIKEN ; Tokyo, U. Earth Sci. Astron.) ; Schneider, G. (Wako, RIKEN ; Mainz U., Inst. Phys.) ; Mooser, A. (Wako, RIKEN) ; Smorra, C. (Wako, RIKEN ; CERN) ; Sellner, S. (Wako, RIKEN) ; Harrington, J. (Heidelberg, Max Planck Inst.) ; Higuchi, T. (Wako, RIKEN ; Tokyo, U. Earth Sci. Astron.) ; Borchert, M. (Hannover, Max Planck Inst. Quantenopt.) ; Tanaka, T. (Wako, RIKEN ; Tokyo, U. Earth Sci. Astron.) ; Besirli, M. (Wako, RIKEN) et al.
We developed highly-sensitive image-current detection systems based on superconducting toroidal coils and ultra-low noise amplifiers for non-destructive measurements of the axial frequencies (550$\sim$800$\,$kHz) of single antiprotons stored in a cryogenic multi-Penning-trap system. The unloaded superconducting tuned circuits show quality factors of up to 500$\,$000, which corresponds to a factor of 10 improvement compared to our previously used solenoidal designs. [...]
arXiv:1612.08481.-
2016-11-18 - 7 p.
- Published in : Rev. Sci. Instrum. 87 (2016) 113305
Preprint: PDF;
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