Radiofrequency multipole traps: Tools for spectroscopy and dynamics of cold molecular ions

Abstract

Multipole radiofrequency ion traps are a highly versatile tool to study molecular ions and their interactions in a well-controllable environment. In particular the cryogenic 22-pole ion trap configuration is used to study ion-molecule reactions and complex molecular spectroscopy at temperatures between few Kelvin and room temperatures. This article presents a tutorial on radiofrequency ion trapping in multipole electrode configurations. Stable trapping conditions and buffer gas cooling, as well as important heating mechanisms, are discussed. In addition, selected experimental studies on cation and anion-molecule reactions and on spectroscopy of trapped ions are reviewed. Starting from these studies an outlook on the future of multipole ion trap research is given.

References in corpus (9)

• A microfabricated surface-electrode ion trap for scalable quantum information processing
• The Diffuse Interstellar Bands: A Major Problem in Astronomical Spectroscopy
• Probing isotope effects in chemical reactions using single ions
• Hydrocarbon anions in interstellar clouds and circumstellar envelopes
• Optimization of segmented linear Paul traps and transport of stored particles
• Photodetachment of cold OH- in a multipole ion trap
• How can a 22-pole ion trap exhibit 10 local minima in the effective potential?
• Evaporation of buffer gas-thermalized anions out of a multipole rf ion trap
• A planar multipole ion trap

Cited by in corpus (36)

• Cold hybrid ion-atom systems
• Observation of Feshbach resonances between a single ion and ultracold atoms
• New method to study ion-molecule reactions at low temperatures and application to the H${}_2^{+}$ + H${}_2$ $\to$ H${}_3^{+}$ + H reaction
• Tunneling in a very slow ion-molecule reaction
• Internal state thermometry of cold trapped molecular anions
• Reactive collisions of trapped anions with ultracold atoms
• Buffer-gas cooling of a single ion in a multipole radio frequency trap beyond the critical mass ratio
• An ion ring in a linear multipole trap for optical frequency metrology
• Formation of H${}_3^{-}$ by radiative association of H${}_2$ and H${}^{-}$ in the interstellar medium
• Incomplete rotational cooling in a 22-pole ion trap
• Cold trapped molecular ions and hybrid platforms for ions and neutral particles
• How can a 22-pole ion trap exhibit 10 local minima in the effective potential?
• The physics and applications of strongly coupled plasmas levitated in electrodynamic traps
• Multipole-moment effects in ion-molecule reactions at low temperatures: part I -- Ion-dipole enhancement of the rate coefficients of the He${}^{+}$ + NH${}_3$ and He${}^{+}$ + ND${}_3$ reactions at collision energies near $0$ K
• A Method for Preparation and Readout of Polyatomic Molecules in Single Quantum States
• The Low-Temperature Nuclear Spin Equilibrium of H3+ in Collisions with H2
• Multipole Electrodynamic Ion Trap Geometries for Microparticle Confinement under Standard Ambient Temperature and Pressure Conditions
• Terahertz-visible two-photon rotational spectroscopy of cold OD-
• Spatial distribution of ions in a linear octopole radio-frequency ion trap in the space-charge limit
• Dynamics of a single trapped ion immersed in a buffer gas
• Rovibrational quenching of C${}_2$-anions in collisions with He, Ne, and Ar atoms
• Spectroscopy and ion thermometry of C${}_2^{-}$ using laser-cooling transitions
• State-selective coherent motional excitation as a new approach for the manipulation, spectroscopy and state-to-state chemistry of single molecular ions
• Associative detachment in anion-atom reactions involving a dipole-bound electron
• Formation of ultracold ion pairs through long-range Rydberg molecules
• Buffer gas cooling of ions in time-dependent traps using ultracold atoms
• Cold reactive and non-reactive collisions of Li and Rb with C${}_2^{-}$: implications for hybrid trap experiments
• Ultracold ion-atom experiments: cooling, chemistry, and quantum effects
• Structural phase transitions in multipole traps
• Fast and efficient transport of large ion clouds
• Parallel ion strings in linear multipole traps
• Resonant states of H${}_3^{-}$ molecule and its isotopologues D${}_2$H${}^{-}$ and H${}_2$D${}^{-}$
• \textit{Ab initio} study of reactive collisions between Rb(${}^{2}S$) or Rb(${}^{2}P$) and OH${}^{-}$(${}^1{\Sigma }^{+}$)
• Temperature-dependent rotationally inelastic collisions of OH- and He
• Cold atom-ion systems in radiofrequency multipole traps: event-drive molecular dynamics and stochastic simulations
• Cold interactions and chemical reactions of linear polyatomic anions with alkali-metal and alkaline-earth-metal atoms