Hannover 2016 – scientific programme
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A: Fachverband Atomphysik
A 27: Precision spectroscopy of atoms and ions I (with Q)
A 27.6: Talk
Wednesday, March 2, 2016, 16:00–16:15, f428
A highly sensitive single particle detector at 75 MHz — •Matthias Borchert1, Klaus Blaum2, Takashi Higuchi3,4, Yasuyuki Matsuda4, Teresa Meiners1, Andreas Mooser3, Hiroki Nagahama3,4, Malte Niemann1, Christian Ospelkaus1, Wolfgang Quint6, Georg Schneider7, Stefan Sellner3, Christian Smorra3,8, Jochen Walz5,7, Yasunori Yamazaki9, and Stefan Ulmer3 — 1Institut für Quantenoptik, Leibniz Universität Hannover, Hannover, Germany — 2Max-Planck-Institut für Kernphysik, Heidelberg, Germany — 3Ulmer Initiative Research Unit, RIKEN, Wako, Japan — 4Graduate School of Arts and Sciences, University of Tokyo, Tokyo, Japan — 5Helmholtz-Institut Mainz, Mainz, Germany — 6GSI-Helmholzzentrum für Schwerionenforschung, Darmstadt, Germany — 7Institut für Physik, Johannes Gutenberg-Universität Mainz, Mainz, Germany — 8CERN, Geneva, Switzerland — 9Atomic Physics Laboratory, RIKEN, Wako, Japan
The BASE collaboration aims at a stringent test of the CPT symmetry by comparing the magnetic moments of the proton and the antiproton with high precision. The magnetic moment in units of the nuclear magneton is determined by measuring the ratio of the spin-precession frequency to the cyclotron frequency, respectively, in an advanced cryogenic Penning trap system.
One limitation in current state of the art experiments is given by noise induced quantum transitions in the modified cyclotron mode of the trapped particles. Higher magnetic field strengths reduce the heating rate of the cyclotron mode, which inspires the development of a non-destructive image-current detector for the modified cyclotron frequency at 75 MHz. For a proton this corresponds to a magnetic field strength of about 5 Tesla.
In this talk I will present the development of such a detector based on a superconducting resonator.