Electric field analysis in a cold-ion source using Stark spectroscopy of Rydberg atoms

• URL: http://arxiv.org/abs/2303.10044v1
• Date: Fri, 17 Mar 2023 15:14:42 GMT
• Title: Electric field analysis in a cold-ion source using Stark spectroscopy of Rydberg atoms
• Authors: Alisher Duspayev and Georg Raithel
• Abstract summary: We analyze electric fields in ion sources generated by quasi-continuous photo-ionization of cold Rb atoms trapped in a focal spot of a near-concentric, in-vacuum cavity for 1064-nm laser light.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We analyze electric fields in ion sources generated by quasi-continuous photo-ionization of cold Rb atoms trapped in the focal spot of a near-concentric, in-vacuum cavity for 1064-nm laser light. Ion streams are extracted with an external electric field, ${\bf{F}}$. Stark effects of Rb 57$F$ and of nearby high-angular-momentum Rydberg levels, which exhibit large, linear Stark shifts, are employed to study the net electric-field probability distribution within the ion-source region over an extraction-field range of $0<F<0.35$ V/cm. For $F=0$, we also investigate ion-field-induced Stark spectra of the 60$P_{1/2}$-state, which exhibits a (lesser) quadratic electric-field response that affords a simplified electric-field analysis. Experimental Rydberg spectra are compared with theoretical Stark spectra, which are weighed with net electric-field distributions obtained from classical ion-trajectory simulations that include Coulomb interactions. Experiments and models agree well. At small $F$ and high ion source rates, the field approximately follows a Holtsmark distribution, and the ion streams are degraded by the Coulomb micro-fields. With increasing $F$ and at lower ion source rates, the fields become narrowly distributed around ${\bf{F}}$, resulting in directional ion streams that are less degraded by micro-fields. Our results are of interest for monitoring cold-ion sources for focused-ion-beam applications, where Coulomb interactions are of concern, and for studies of electric fields in cold plasmas.

Related papers

• Ion-molecule reactions below 1~K: Observation of a strong enhancement of the reaction rate of the ion-dipole reaction He$^+$+ CH$_3$F [55.41644538483948]
  Reaction between He$+$ and CH$_3$F forming predominantly CH$+$ and CHF$+$. To avoid heating of the ions by stray electric fields, the reaction was observed within the orbit of a highly excited Rydberg electron.
  arXiv  Detail & Related papers  (2021-12-22T17:32:43Z)
• High-resolution 'magic'-field spectroscopy on trapped polyatomic molecules [62.997667081978825]
  Rapid progress in cooling and trapping of molecules has enabled first experiments on high resolution spectroscopy of trapped diatomic molecules. Extending this work to polyatomic molecules provides unique opportunities due to more complex geometries and additional internal degrees of freedom.
  arXiv  Detail & Related papers  (2021-10-21T15:46:17Z)
• Engineering the Radiative Dynamics of Thermalized Excitons with Metal Interfaces [58.720142291102135]
  We analyze the emission properties of excitons in TMDCs near planar metal interfaces. We find suppression or enhancement of emission relative to the point dipole case by several orders of magnitude. nanoscale optical cavities are a viable pathway to generating long-lifetime exciton states in TMDCs.
  arXiv  Detail & Related papers  (2021-10-11T19:40:24Z)
• Millicharged dark matter detection with ion traps [22.42090005507693]
  Ion traps have several properties which make them ideal detectors for such a signal. Ion traps have low thresholds for detection of energy deposition. Ion traps limit the local density to be $n_Q lesssim 1, textrmcm-3$, a factor $sim 108$ better than current constraints.
  arXiv  Detail & Related papers  (2021-08-11T15:29:36Z)
• Trapping Ions and Atoms Optically [0.0]
  Isolating neutral and charged particles from the environment is essential in precision experiments. For decades, this has been achieved by trapping ions with radio-frequency (rf) fields and neutral particles with optical fields. Recently, trapping of ions by interaction with light has been demonstrated.
  arXiv  Detail & Related papers  (2021-05-03T20:18:44Z)
• Algorithmic Ground-state Cooling of Weakly-Coupled Oscillators using Quantum Logic [52.77024349608834]
  We introduce a novel algorithmic cooling protocol for transferring phonons from poorly- to efficiently-cooled modes. We demonstrate it experimentally by simultaneously bringing two motional modes of a Be$+$-Ar$13+$ mixed Coulomb crystal close to their zero-point energies. We reach the lowest temperature reported for a highly charged ion, with a residual temperature of only $Tlesssim200mathrmmu K$ in each of the two modes.
  arXiv  Detail & Related papers  (2021-02-24T17:46:15Z)
• Electron-positron vacuum instability in strong electric fields. Relativistic semiclassical approach [0.0]
  Instability of electron-positron vacuum in strong electric fields is studied. "electron condensation" on levels of upper continuum crossed the boundary of the lower continuum. Some arguments are presented in favor of the logical consistency of QED.
  arXiv  Detail & Related papers  (2021-02-14T16:00:56Z)
• Trapping, Shaping and Isolating of Ion Coulomb Crystals via State-selective Optical Potentials [55.41644538483948]
  In conventional ion traps, the trapping potential is close to independent of the electronic state, providing confinement for ions dependent on their charge-to-mass ratio $Q/m$. Here we experimentally study optical dipole potentials for $138mathrmBa+$ ions stored within two distinctive traps operating at 532 nm and 1064 nm.
  arXiv  Detail & Related papers  (2020-10-26T14:36:48Z)
• The Stark effect in superfluid $^4$He with relative flows [0.0]
  Stark-type effect is observed in superfluid $4$He in presence of relative laminar flows. Line of absorption/radiation is observed in the EM spectrum, the frequency of which - 180 GHz - corresponds to the roton minimum.
  arXiv  Detail & Related papers  (2020-09-13T16:26:32Z)
• Electrically tuned hyperfine spectrum in neutral Tb(II)(Cp$^{\rm{iPr5}}$)$_2$ single-molecule magnet [64.10537606150362]
  Both molecular electronic and nuclear spin levels can be used as qubits. In solid state systems with dopants, an electric field was shown to effectively change the spacing between the nuclear spin qubit levels. This hyperfine Stark effect may be useful for applications of molecular nuclear spins for quantum computing.
  arXiv  Detail & Related papers  (2020-07-31T01:48:57Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.