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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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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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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
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An optical atomic clock based on a highly charged ion
/ King, Steven A. (Braunschweig, Phys. Tech. Bund.) ; Spieß, Lukas J. (Braunschweig, Phys. Tech. Bund.) ; Micke, Peter (Braunschweig, Phys. Tech. Bund. ; Heidelberg, Max Planck Inst. ; CERN) ; Wilzewski, Alexander (Braunschweig, Phys. Tech. Bund.) ; Leopold, Tobias (Braunschweig, Phys. Tech. Bund.) ; Benkler, Erik (Braunschweig, Phys. Tech. Bund.) ; Lange, Richard (Braunschweig, Phys. Tech. Bund.) ; Huntemann, Nils (Braunschweig, Phys. Tech. Bund.) ; Surzhykov, Andrey (Braunschweig, Phys. Tech. Bund. ; Braunschweig Tech. U.) ; Yerokhin, Vladimir A. (Braunschweig, Phys. Tech. Bund.) et al.
Optical atomic clocks are the most accurate measurement devices ever constructed and have found many applications in fundamental science and technology. The use of highly charged ions (HCI) as a new class of references for highest accuracy clocks and precision tests of fundamental physics has long been motivated by their extreme atomic properties and reduced sensitivity to perturbations from external electric and magnetic fields compared to singly charged ions or neutral atoms. [...]
arXiv:2205.13053.-
2022-11-02 - 10 p.
- Published in : Nature 611 (2022) 43-47
Fulltext: PDF;
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A new benchmark of soft X-ray transition energies of $\mathrm {Ne}$, $\mathrm {CO}_2$, and $\mathrm {SF}_6$: paving a pathway towards ppm accuracy
/ Stierhof, J. (Erlangen - Nuremberg U.) ; Kühn, S. (Heidelberg, Max Planck Inst.) ; Winter, M. (Erlangen - Nuremberg U. ; Neel Lab, Grenoble) ; Micke, P. (CERN) ; Steinbrügge, R. (DESY) ; Shah, C. (NASA, Goddard ; Heidelberg, Max Planck Inst. ; LLNL, Livermore) ; Hell, N. (LLNL, Livermore) ; Bissinger, M. (Erlangen - Nuremberg U.) ; Hirsch, M. (Erlangen - Nuremberg U.) ; Ballhausen, R. (Erlangen - Nuremberg U.) et al.
A key requirement for the correct interpretation of high-resolution X-ray spectra is that transition energies are known with high accuracy and precision. We investigate the K-shell features of Ne, CO$_2$, and SF$_6$ gases, by measuring their photo ion-yield spectra at the BESSY II synchrotron facility simultaneously with the 1s-np fluorescence emission of He-like ions produced in the Polar-X EBIT. [...]
arXiv:2203.03725.-
2022-03-01 - 13 p.
- Published in : Eur. Phys. J. D
Fulltext: 2203.03725 - PDF; Corrigendum - PDF; Publication - PDF; Erratum - PDF;
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Baryon Antibaryon Symmetry Experiment
/ Wursten, E J et al.
- BASE.
Approved: 05 June 2013.-
Status: Data Taking
External link: Experiment home page
Experiment: AD-8
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