Sympathetic cooling schemes for separately trapped ions coupled via image currents

Abstract

Cooling of particles to mK-temperatures is essential for a variety of experiments with trapped charged particles. However, many species of interest lack suitable electronic transitions for direct laser cooling. We study theoretically the remote sympathetic cooling of a single proton with laser-cooled ${}^9$Be${}^{+}$ in a double-Penning-trap system. We investigate three different cooling schemes and find, based on analytical calculations and numerical simulations, that two of them are capable of achieving proton temperatures of about 10 mK with cooling times on the order of 10 s. In contrast, established methods such as feedback-enhanced resistive cooling with image-current detectors are limited to about 1 K in 100 s. Since the studied techniques are applicable to any trapped charged particle and allow spatial separation between the target ion and the cooling species, they enable a variety of precision measurements based on trapped charged particles to be performed at improved sampling rates and with reduced systematic uncertainties.

arXiv comment28 pages, 14 figures

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Cited by in corpus (7)

• Electroweak Nuclear Properties from Single Molecular Ions in a Penning Trap
• Indirect Cooling of Weakly Coupled Trapped-Ion Mechanical Oscillators
• BASE-STEP: A transportable antiproton reservoir for fundamental interaction studies
• Optical stimulated-Raman sideband spectroscopy of a single ${}^9$Be${}^{+}$ ion in a Penning trap
• Trap-integrated fluorescence detection based on silicon photomultipliers in a cryogenic Penning trap
• Strong coherent ion-electron coupling using a wire data bus
• Sympathetic cooling of charged particles in Penning traps using electron cyclotron radiation