Freiburg 2024 – scientific programme
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A: Fachverband Atomphysik
A 22: Highly Charged Ions and their Applications I
A 22.2: Talk
Wednesday, March 13, 2024, 14:45–15:00, HS 1098
Towards optical spectroscopy of highly charged californium ions in preparation for a Cf15+/17+ ion clock — •Lakshmi Priya Kozhiparambil Sajith1,4, Nils Holger Rehbehn2, Michael Karl Rosner2, Kostas Georgiou3, Leo Prokhorov3, Aaron Smith3, Luis Hellmich4, Ullrich Schwanke4, Giovanni Barontini3, José Ramon Crespo López-Urrutia2, and Steven Worm1,4 — 1Deutsches Elektronen Synchrotron (DESY), Platanenallee 6, 15738 Zeuthen , Germany — 2Max Planck Institut für Kernphysik, Saupfercheckweg 1, Heidelberg, Germany — 3School of Physics and Astronomy, University of Birmingham, Edgbaston Park Rd, Birmingham B15 2TT, United Kingdom — 4Humbolt Universität zu Berlin, Unter den Linden 6, 10117 Berlin , Germany
Highly charged Cf ions are a very good candidate for investigating possible variations in fundamental constants owing to its high sensitivity coefficient, in particular, of the fine structure constant. For the construction of a Cf15+ or Cf17+ optical clock, Cf atoms, ablated from a source with a laser, are fed into an electron beam ion trap (EBIT) where highly charged Cf ions are produced, which are then transported through a beam line where they are bunched and pre-cooled and finally trapped in a Coulomb crystal of Ca ions in a cryogenic Paul trap. For the determination of the clock transition for the highly charged Cf ion clock, optical spectroscopy will be performed in an electron beam ion trap. The experimental set-up, including the complexities of the injection of californium atoms, and some preliminary results will be presented.
Keywords: Californium; Optical spectroscopy; Laser ablation; Optical clock; Electron beam ion trap