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A: Fachverband Atomphysik
A 35: Precision Spectroscopy of atoms and ions
A 35.21: Poster
Donnerstag, 14. März 2019, 16:15–18:15, S Fobau Physik
Optically transparent solid electrodes for precision Penning traps — Marco Wiesel1,2,3, Gerhard Birkl3, Mohammad Sadegh Ebrahimi1,2, Zhexi Guo1,2,4, •Kanika Kanika1,2, Jeffrey Klimes1,2,4, Alexander Martin3, Wolfgang Quint1,2, Nils Stallkamp1,5, and Manuel Vogel1,5 — 1GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany — 2Physikalisches Institut, Universität Heidelberg, 69120 Heidelberg, Germany — 3Institut für Angewandte Physik, Technische Universität Darmstadt, 64289 Darmstadt, Germany — 4Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany — 5Helmholtz-Institut Jena, 07743 Jena, Germany
The concept of an electrically conducting yet optically transparent solid electrode was conceived, and subsequently materialised, tested and implemented in a cryogenic Penning trap. Dedicated to spectroscopy and imaging of confined particles under large solid angles, this trap utilises a 'half-open design' with an open endcap for easy ion ingress and a closed endcap that mainly consists of a glass window coated with a highly transparent conductive indium tin oxide layer. This closed endcap retains the desired trapping capabilities of a conventional endcap electrode and yields flexible access for optical excitation and efficient light collection from the trapping region. With its superior surface quality and its high as well as homogeneous optical transmission, the window electrode is an excellent replacement for partially transmissive electrodes that use holes, slits, metallic meshes, and the like.