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Geistlinger K, Fischer M, Spieler S, Remmers L, Duensing F, Dahlmann F, Endres E, Wester R. A sub-4 Kelvin radio frequency linear multipole wire trap. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2021; 92:023204. [PMID: 33648123 DOI: 10.1063/5.0040866] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 01/22/2021] [Indexed: 06/12/2023]
Abstract
A linear cryogenic 16-pole wire ion trap has been developed and constructed for cryogenic ion spectroscopy at temperatures below 4 K. The trap is temperature-variable, can be operated with different buffer gases, and offers large optical access perpendicular to the ion beam direction. The housing geometry enables temperature measurement during radio frequency operation. The effective trapping potential of the wire-based radio frequency trap is described and compared to conventional multipole ion trap designs. Furthermore, time-of-flight mass spectra of multiple helium tagged protonated glycine ions that are extracted from the trap are presented, which prove very low ion temperatures and suitable conditions for sensitive spectroscopy.
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Affiliation(s)
- Katharina Geistlinger
- Universität Innsbruck, Institut für Ionenphysik und Angewandte Physik, Technikerstraße 25/3, 6020 Innsbruck, Austria
| | - Moritz Fischer
- Universität Innsbruck, Institut für Ionenphysik und Angewandte Physik, Technikerstraße 25/3, 6020 Innsbruck, Austria
| | - Steffen Spieler
- Universität Innsbruck, Institut für Ionenphysik und Angewandte Physik, Technikerstraße 25/3, 6020 Innsbruck, Austria
| | - Lena Remmers
- Universität Innsbruck, Institut für Ionenphysik und Angewandte Physik, Technikerstraße 25/3, 6020 Innsbruck, Austria
| | - Felix Duensing
- Universität Innsbruck, Institut für Ionenphysik und Angewandte Physik, Technikerstraße 25/3, 6020 Innsbruck, Austria
| | - Franziska Dahlmann
- Universität Innsbruck, Institut für Ionenphysik und Angewandte Physik, Technikerstraße 25/3, 6020 Innsbruck, Austria
| | - Eric Endres
- Universität Innsbruck, Institut für Ionenphysik und Angewandte Physik, Technikerstraße 25/3, 6020 Innsbruck, Austria
| | - Roland Wester
- Universität Innsbruck, Institut für Ionenphysik und Angewandte Physik, Technikerstraße 25/3, 6020 Innsbruck, Austria
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2
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Blech A, Shagam Y, Hölsch N, Paliwal P, Skomorowski W, Rosenberg JW, Bibelnik N, Heber O, Reich DM, Narevicius E, Koch CP. Phase protection of Fano-Feshbach resonances. Nat Commun 2020; 11:999. [PMID: 32081896 PMCID: PMC7035365 DOI: 10.1038/s41467-020-14797-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Accepted: 02/03/2020] [Indexed: 12/05/2022] Open
Abstract
Decay of bound states due to coupling with free particle states is a general phenomenon occurring at energy scales from MeV in nuclear physics to peV in ultracold atomic gases. Such a coupling gives rise to Fano-Feshbach resonances (FFR) that have become key to understanding and controlling interactions-in ultracold atomic gases, but also between quasiparticles, such as microcavity polaritons. Their energy positions were shown to follow quantum chaotic statistics. In contrast, their lifetimes have so far escaped a similarly comprehensive understanding. Here, we show that bound states, despite being resonantly coupled to a scattering state, become protected from decay whenever the relative phase is a multiple of π. We observe this phenomenon by measuring lifetimes spanning four orders of magnitude for FFR of spin-orbit excited molecular ions with merged beam and electrostatic trap experiments. Our results provide a blueprint for identifying naturally long-lived states in a decaying quantum system.
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Affiliation(s)
- Alexander Blech
- Theoretische Physik, Universität Kassel, Heinrich-Plett-Straße 40, 34132, Kassel, Germany
- Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Yuval Shagam
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, 76100, Israel
- JILA, NIST and the Department of Physics, University of Colorado, Boulder, CO, 80309, USA
| | - Nicolas Hölsch
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, 76100, Israel
- Laboratorium für Physikalische Chemie, ETH Zürich, 8093, Zürich, Switzerland
| | - Prerna Paliwal
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, 76100, Israel
| | - Wojciech Skomorowski
- Theoretische Physik, Universität Kassel, Heinrich-Plett-Straße 40, 34132, Kassel, Germany
- Department of Chemistry, University of Southern California, Los Angeles, CA, 90089, USA
| | - John W Rosenberg
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, 76100, Israel
| | - Natan Bibelnik
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, 76100, Israel
| | - Oded Heber
- Department of Particle Physics and Astrophysics, Weizmann Institute of Science, Rehovot, 76100, Israel
| | - Daniel M Reich
- Theoretische Physik, Universität Kassel, Heinrich-Plett-Straße 40, 34132, Kassel, Germany
- Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Edvardas Narevicius
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, 76100, Israel
| | - Christiane P Koch
- Theoretische Physik, Universität Kassel, Heinrich-Plett-Straße 40, 34132, Kassel, Germany.
- Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Freie Universität Berlin, Arnimallee 14, 14195, Berlin, Germany.
- Department of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot, 76100, Israel.
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Endres ES, Lakhmanskaya O, Hauser D, Huber SE, Best T, Kumar SS, Probst M, Wester R. Upper Limits to the Reaction Rate Coefficients of Cn– and CnH– (n = 2, 4, 6) with Molecular Hydrogen. J Phys Chem A 2014; 118:6705-10. [DOI: 10.1021/jp504242p] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Eric S. Endres
- Institute
for Ion Physics and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria
| | - Olga Lakhmanskaya
- Institute
for Ion Physics and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria
| | - Daniel Hauser
- Institute
for Ion Physics and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria
| | - Stefan E. Huber
- Institute
for Ion Physics and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria
| | - Thorsten Best
- Institute
for Ion Physics and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria
| | - Sunil S. Kumar
- Institute
for Ion Physics and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria
| | - Michael Probst
- Institute
for Ion Physics and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria
| | - Roland Wester
- Institute
for Ion Physics and Applied Physics, University of Innsbruck, 6020 Innsbruck, Austria
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4
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Cetina M, Grier AT, Vuletić V. Micromotion-induced limit to atom-ion sympathetic cooling in Paul traps. PHYSICAL REVIEW LETTERS 2012; 109:253201. [PMID: 23368457 DOI: 10.1103/physrevlett.109.253201] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2012] [Indexed: 06/01/2023]
Abstract
We present, and derive analytic expressions for, a fundamental limit to the sympathetic cooling of ions in radio-frequency traps using cold atoms. The limit arises from the work done by the trap electric field during a long-range ion-atom collision and applies even to cooling by a zero-temperature atomic gas in a perfectly compensated trap. We conclude that in current experimental implementations, this collisional heating prevents access to the regimes of single-partial-wave atom-ion interaction or quantized ion motion. We determine conditions on the atom-ion mass ratio and on the trap parameters for reaching the s-wave collision regime and the trap ground state.
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Affiliation(s)
- Marko Cetina
- Department of Physics, MIT-Harvard Center for Ultracold Atoms, and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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5
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Lorenz UJ, Rizzo TR. Planar Multipole Ion Trap/Time-of-Flight Mass Spectrometer. Anal Chem 2011; 83:7895-901. [DOI: 10.1021/ac201790d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Ulrich J. Lorenz
- Laboratoire de Chimie Physique Moléculaire, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Thomas R. Rizzo
- Laboratoire de Chimie Physique Moléculaire, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
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6
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Hlavenka P, Otto R, Trippel S, Mikosch J, Weidemüller M, Wester R. Absolute photodetachment cross section measurements of the O− and OH− anion. J Chem Phys 2009; 130:061105. [PMID: 19222260 DOI: 10.1063/1.3080809] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Affiliation(s)
- P Hlavenka
- Physikalisches Institut, Universität Freiburg, Hermann-Herder-Strasse 3, 79104 Freiburg, Germany
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7
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DeVoe RG. Power-law distributions for a trapped ion interacting with a classical buffer gas. PHYSICAL REVIEW LETTERS 2009; 102:063001. [PMID: 19257583 DOI: 10.1103/physrevlett.102.063001] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2008] [Indexed: 05/27/2023]
Abstract
Classical collisions with an ideal gas generate non-Maxwellian distribution functions for a single ion in a radio frequency ion trap. The distributions have power-law tails whose exponent depends on the ratio of buffer gas to ion mass. This provides a statistical explanation for the previously observed transition from cooling to heating. Monte Carlo results approximate a Tsallis distribution over a wide range of parameters and have ab initio agreement with experiment.
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Affiliation(s)
- Ralph G DeVoe
- Physics Department, Stanford University, Stanford, California 94305, USA
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8
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Kreckel H, Bing D, Reinhardt S, Petrignani A, Berg M, Wolf A. Chemical probing spectroscopy of H3+ above the barrier to linearity. J Chem Phys 2009; 129:164312. [PMID: 19045271 DOI: 10.1063/1.2994730] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We have performed chemical probing spectroscopy of H(3) (+) ions trapped in a cryogenic 22-pole ion trap. The ions were buffer gas cooled to approximately 55 K by collisions with helium and argon. Excitation to states above the barrier to linearity was achieved by a Ti:sapphire laser operated between 11 300 and 13 300 cm(-1). Subsequent collisions of the excited H(3) (+) ions with argon lead to the formation of ArH(+) ions that were detected by a quadrupole mass spectrometer with high sensitivity. We report the observation of 17 previously unobserved transitions to states above the barrier to linearity. Comparison to theoretical calculations suggests that the transition strengths of some of these lines are more than five orders of magnitude smaller than those of the fundamental band, which renders them-to the best of our knowledge-the weakest H(3) (+) transitions observed to date.
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Affiliation(s)
- Holger Kreckel
- Max-Planck-Institut fur Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany.
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9
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Mikosch J, Otto R, Trippel S, Eichhorn C, Weidemüller M, Wester R. Inverse temperature dependent lifetimes of transient S(N)2 ion-dipole complexes. J Phys Chem A 2008; 112:10448-52. [PMID: 18821740 DOI: 10.1021/jp804655k] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The association and collisional stabilization of the S(N)2 entrance channel complex [Cl(-)...CH3Cl]* is studied in a low-temperature radiofrequency ion trap. The temperature dependence of the ternary rate coefficient is measured and a much stronger inverse temperature dependence than expected from a simple statistical calculation is found. From these data the lifetime of the transient S(N)2 complex has been derived as a function of temperature. It is suggested that the inverse temperature dependent rates of nonsymmetric S(N)2 reactions are related to the observed inverse temperature dependence of the transient ion-dipole complexes.
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Affiliation(s)
- J Mikosch
- Physikalisches Institut, Universität Freiburg, Hermann-Herder-Strasse 3, 79104 Freiburg, Germany
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10
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Otto R, Mikosch J, Trippel S, Weidemüller M, Wester R. Nonstandard behavior of a negative ion reaction at very low temperatures. PHYSICAL REVIEW LETTERS 2008; 101:063201. [PMID: 18764452 DOI: 10.1103/physrevlett.101.063201] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2008] [Indexed: 05/26/2023]
Abstract
We have studied the negative ion reaction NH2-+H_{2}-->NH_{3}+H- in the temperature range from 300 to 8 K. We observe a strongly suppressed probability for proton transfer at room temperature. With decreasing temperature, this probability increases, in accordance with a longer lifetime of an intermediate anion-neutral complex. At low temperatures, a maximum in the reaction rate coefficient is observed that suggests the presence of a very small barrier at long range or a quantum mechanical resonance feature.
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Affiliation(s)
- R Otto
- Physikalisches Institut, Universität Freiburg, Hermann-Herder-Strasse 3, 79104 Freiburg, Germany
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Mikosch J, Trippel S, Otto R, Eichhorn C, Hlavenka P, Weidemüller M, Wester R. Kinematically complete reaction dynamics of slow ions. ACTA ACUST UNITED AC 2007. [DOI: 10.1088/1742-6596/88/1/012025] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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