Dynamic laser ablation loading of a linear Paul trap

Abstract

We present a detailed method for accumulating Ca${}^{+}$ ions controllably in a linear Paul trap. The ions are generated by pulsed laser ablation and dynamically loaded into the ion trap by switching the trapping potential on and off. The loaded ions are precooled by buffer gas and then laser-cooled to form Coulomb crystals for verifying quantity. The number of ions is controlled by manipulating the trapping potential of the ion trap, partial pressure of buffer gas and turn-on time of the entrance end cap voltage. With single-pulse laser ablation, the number of trapped ions ranges from tens to ten thousand. The kinetic energy of loaded ions can be selected via the optimal turn-on time of the entrance end cap. Using multiple-pulse laser ablation, the number is further increased and reaches about $4\times 10^4$. The dynamic loading method has wide application for accumulating low-yielding ions via laser ablation in the ion trap.

arXiv comment12 pages, 4 figures

References in corpus (18)

• Demonstration of a small programmable quantum computer with atomic qubits
• An ${}^{27}$Al${}^{+}$ quantum-logic clock with systematic uncertainty below $10^{-18}$
• Isotope-selective photo-ionization for calcium ion trapping
• Scalable global entangling gates on arbitrary ion qubits
• Wigner Crystals of 229Th for Optical Excitation of the Nuclear Isomer
• Proton-electron mass ratio by high-resolution optical spectroscopy of ion ensembles in the resolved-carrier regime
• Ion Coulomb Crystals
• Laser ablation loading of a surface-electrode ion trap
• Laser cooling of externally produced Mg ions in a Penning trap for sympathetic cooling of highly charged ions
• Cryogenic Ion Trapping Systems with Surface-Electrode Traps
• Laser ablation loading of a radiofrequency ion trap
• Laser-cooled ytterbium ion frequency standard
• Laser ablation production of Ba, Ca, Dy, Er, La, Lu, and Yb ions
• Isotope-Selective Laser Ablation Ion-Trap Loading of ${}^{137}{\mathrm{Ba}}^{+}$ using a ${\mathrm{BaCl}}_2$ Target
• Analytical model of an ion cloud cooled by collisions in a Paul trap
• Sympathetic cooling of a large ${}^{113}{\mathrm{Cd}}^{+}$ ion crystal with ${}^{40}{\mathrm{Ca}}^{+}$ in a linear Paul trap
• Rapid production of defect-free beryllium ion Coulomb crystals
• Compact atom source using fiber-based pulsed laser ablation