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A: Fachverband Atomphysik

A 36: Highly Charged Ions and their Applications II

A 36.6: Vortrag

Freitag, 15. März 2024, 12:30–12:45, HS 1010

Sympathetic cooling of ions using electron cyclotron radiation at the ELCOTRAP experiment — •Jost Herkenhoff, Sergey Eliseev, Sven Sturm, and Klaus Blaum — Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany

The evolution of precision in recent Penning-trap experiments is driving the need for ever-improving cooling techniques. In this talk, the prospect of a new sympathetic cooling technique using an electron-plasma coupled to a single ion is presented.

The cyclotron mode of electrons in a strong magnetic field and cryogenic environment decays to very low quantum numbers by emission of cyclotron radiation, causing this mode to end up predominantly in its ground state. Driving the motional sideband allows the axial motion to thermalize with the cyclotron motion to its ground state, which can then be coupled to a single ion stored in a spatially separated Penning trap using a common-resonator, allowing sympathetic cooling of all motional degrees of the ion. The extremely low expected temperatures in the millikelvin range open up an exciting new frontier of measurements in Penning traps.

The first implementation of this technique is currently being developed at the dedicated ELCOTRAP experiment at the Max-Planck Institute for Nuclear Physics, whose current status and prospects will be presented in this talk.

Keywords: Sympathetic cooling; Resolved sideband; Penning trap; Electron