SAMOP 2021 – scientific programme

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MS: Fachverband Massenspektrometrie

MS 1: Precision Mass Measurements I

MS 1.3: Talk

Monday, September 20, 2021, 11:30–11:45, H3

The transportable antiproton trap BASE-STEP — •Christian Smorra¹, Fatma Abbass¹, Matthew Bohman^2,3, Daniel Popper¹, Ron Moller¹, Markus Wiesinger^2,3, Christian Will^2,3, Jack Devlin^2,4, Stefan Erlewein^2,4, Markus Fleck^2,5, Julia Jaeger^2,3, Barbara Latacz², Peter Micke^2,4, Elise Wursten^2,4, Klaus Blaum³, Yasuyuki Matsuda⁵, Christian Ospelkaus^6,7, Wolfgang Quint⁸, Anna Soter⁹, Jochen Walz^1,10, Yasunori Yamazaki², and Stefan Ulmer² — ¹Johannes Gutenberg-Universität, Mainz, Germany — ²RIKEN, Wako-shi, Japan — ³Max-Planck-Institute for Nuclear Physics, Heidelberg, Germany — ⁴CERN, Geneva, Switzerland — ⁵University of Tokyo, Japan — ⁶Leibniz Universität Hannover, Germany — ⁷PTB Braunschweig, Germany — ⁸GSI, Darmstadt, Germany — ⁹ETH Zürich, Switzerland — ¹⁰Helmholtz Institute Mainz, Germany

High-precision comparisons of the proton's and antiproton's charge-to-mass ratios and magnetic moments constitute stringent tests of CPT invariance, one of the cornerstones in the Standard Model of particle physics. The BASE collaboration has advanced these tests by precision measurements on single trapped antiprotons in a multi-Penning trap system in the antiproton decelerator hall at CERN, where magnetic field noise from the facility operation have become a major concern. To further advance the precision, we have designed the transportable antiproton trap BASE-STEP to relocate antiproton precision measurements into other laboratories. I will present a design report and the status of the project.