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K. Blaum - One of the best experts on this subject based on the ideXlab platform.
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Demonstration of the double Penning Trap technique with a single proton
Physics Letters B, 2013Co-Authors: A. Mooser, S. Bräuninger, K. Franke, H. Kracke, C. Leiteritz, C.c. Rodegheri, H. Nagahama, G. Schneider, C. Smorra, K. BlaumAbstract:AbstractSpin flips of a single proton were driven in a Penning Trap with a homogeneous magnetic field. For the spin-state analysis the proton was transported into a second Penning Trap with a superimposed magnetic bottle, and the continuous Stern–Gerlach effect was applied. This first demonstration of the double Penning Trap technique with a single proton suggests that the antiproton magnetic moment measurement can potentially be improved by three orders of magnitude or more
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Penning Trap mass measurements on nobelium isotopes
Physical Review C, 2010Co-Authors: M. Dworschak, K. Blaum, S Eliseev, G. Audi, M. Block, D. Ackermann, C. Droese, T. Fleckenstein, E. Haettner, F HerfurthAbstract:The Penning Trap mass spectrometer SHIPTrap at GSI Darmstadt allows accurate mass measurements of radionuclides, produced in fusion-evaporation reactions and separated by the velocity filter SHIP from the primary beam. Recently, the masses of the three nobelium isotopes (252-254)No were determined. These are the first direct mass measurements of transuranium elements, which provide new anchor points in this region. The heavy nuclides were produced in cold-fusion reactions by irradiating a PbS target with a (48)Ca beam, resulting in production rates of the nuclei of interest of about one atom per second. In combination with data from decay spectroscopy our results are used to perform a new atomic-mass evaluation in this region.
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Mass measurements of short-lived nuclides using the ISOLTrap preparation Penning Trap
2010Co-Authors: S. Naimi, K. Blaum, M Breitenfeldt, F Herfurth, G. Audi, S George, M. Rosenbusch, C. Böhm, C. Borgmann, A HerlertAbstract:For exotic nuclear species, short decay half-lives make precision mass measurements particularly challenging. Combining isobaric purification and themass measurement in the same Trap may offer an interesting compromise between losses due to half-life and measurement precision. Here we discuss a mass measurement performed in a preparation Penning Trap, and perform a study of the resonance lineshape.
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Recent developments in ion detection techniques for Penning Trap mass spectrometry at TRIGA-Trap
The European Physical Journal A, 2009Co-Authors: Jens Ketelaer, Michael Block, Jochen Ketter, K. Blaum, Rafael Ferrer, F Herfurth, S George, K. Eberhardt, M. Eibach, Sz. NagyAbstract:The highest precision in the determination of nuclear and atomic masses can be achieved by Penning Trap mass spectrometry. The mass value is obtained through a measurement of the cyclotron frequency of the stored charged particle. Two different approaches are used at the Penning Trap mass spectrometer TRIGA-Trap for the mass determination: the destructive Time-Of-Flight Ion Cyclotron Resonance (TOF-ICR) technique and the non-destructive Fourier Transform Ion Cyclotron Resonance (FT-ICR) method. New developments for both techniques are described, which will improve the detection efficiency and the suppression of contaminations in the case of TOF-ICR. The FT-ICR detection systems will allow for the investigation of an incoming ion bunch from a radioactive-beam facility on the one hand, and for the detection of a single singly charged ion in the Penning Trap on the other hand.
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Electric and magnetic field optimization procedure for Penning Trap mass spectrometers
Nuclear Instruments and Methods in Physics Research Section A: Accelerators Spectrometers Detectors and Associated Equipment, 2009Co-Authors: D Beck, K. Blaum, G. Bollen, F Herfurth, A Herlert, D. Lunney, S George, P. Delahaye, C. Guenaut, L. SchweikhardAbstract:Significant systematic errors in high-precision Penning Trap mass spectrometry can result from electric- and magnetic-field imperfections. An experimental procedure to minimize these uncertainties is presented for the on-line Penning Trap mass spectrometer ISOLTrap, located at ISOLDE/CERN. The deviations from the ideal magnetic and electric fields are probed by measuring the cyclotron frequency and the reduced cyclotron frequency, respectively, of stored ions as a function of the time between the ejection of ions from the preparation Trap and their capture in the precision Trap, which influences the energy of their axial motion. The correction parameters are adjusted to minimize the frequency shifts. (C) 2008 Elsevier B.V. All rights reserved.
Klaus Blaum - One of the best experts on this subject based on the ideXlab platform.
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Penning Trap mass measurements in atomic and nuclear physics
Annual Review of Nuclear and Particle Science, 2018Co-Authors: Klaus Blaum, M. Brodeur, J Dilling, S EliseevAbstract:Penning-Trap mass spectrometry in atomic and nuclear physics has become a well-established and reliable tool for the determination of atomic masses. In combination with short-lived radioactive nucl...
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Classical calculation of relativistic frequency-shifts in an ideal Penning Trap
International Journal of Mass Spectrometry, 2014Co-Authors: Jochen Ketter, Tommi Eronen, Martin Höcker, Marc Schuh, Sebastian Streubel, Klaus BlaumAbstract:Abstract The ideal Penning Trap consists of a uniform magnetic field and an electrostatic quadrupole potential. In the classical low-energy limit, the three characteristic eigenfrequencies of a charged particle Trapped in this configuration do not depend on the amplitudes of the three eigenmotions. No matter how accurate the experimental realization of the ideal Penning Trap, its harmonicity is ultimately compromised by special relativity. Using a classical formalism of first-order perturbation theory, we calculate the relativistic frequency-shifts associated with the motional degrees of freedom for a spinless particle stored in an ideal Penning Trap, and we compare the results with the simple but surprisingly accurate model of relativistic mass-increase.
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Penning-Trap mass spectrometry and neutrino physics
Annalen der Physik, 2013Co-Authors: Sergey Eliseev, Yuri N. Novikov, Klaus BlaumAbstract:Rapidly developing neutrino physics has found in Penning-Trap mass spectrometry a staunch ally in investigating a variety of fundamental problems. The most familiar are the absolute neutrino mass, possible existence of resonant neutrinoless double-electron capture and of keV-sterile neutrinos, and investigation of neutrino oscillations. This article is a brief review of the latest achievements and future perspectives of Penning-Trap mass spectrometry in the exploration of these problems with a focus on electron capture and double electron capture processes.
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damping effects in Penning Trap mass spectrometry
International Journal of Mass Spectrometry, 2011Co-Authors: Michael Block, M. Dworschak, Sebastian George, Klaus Blaum, M Breitenfeldt, F Herfurth, A Herlert, Magdalena KowalskaAbstract:Abstract Collisions of ions with residual gas atoms in a Penning Trap can have a strong influence on the trajectories of the ions, depending on the atom species and the gas pressure. We report on investigations of damping effects in time-of-flight ion-cyclotron resonance mass spectrometry with the Penning Trap mass spectrometers ISOLTrap at ISOLDE/CERN (Geneva, Switzerland) and SHIPTrap at GSI (Darmstadt, Germany). The work focuses on the interconversion of the magnetron and cyclotron motional modes, in particular the modification of the resonance profiles for quadrupolar excitation due to the damping effect of the residual gas. Extensive experiments have been performed with standard and Ramsey excitation schemes. The results are in good agreement with predictions obtained by analytical continuation of the formulae for the undamped case.
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Precision Penning Trap mass measurements on exotic ions: status and perspectives
Hyperfine Interactions, 2009Co-Authors: Klaus Blaum, Michael BlockAbstract:Penning Traps are powerful instruments for the precise and accurate mass determination of rare isotopes. At present, many Penning Trap facilities installed at radioactive beam facilities provide key data for nuclear astrophysics, for the study of nuclear structure evolution far from stability, and the test of fundamental interactions. This article summarizes the present status and current limits in the field of high-precision Penning Trap mass measurements on short-lived exotic ions.
G. Bollen - One of the best experts on this subject based on the ideXlab platform.
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Penning Trap mass measurement of 26Si
Physical Review C, 2010Co-Authors: A. A. Kwiatkowski, B. R. Barquest, G. Bollen, C. M. Campbell, Rafael Ferrer, A. E. Gehring, D. L. Lincoln, D. J. Morrissey, G. K. Pang, Joshua J. SavoryAbstract:The mass excess of the superallowed β emitter 26 Si has been determined with the LEBIT Penning Trap mass spectrometer to be -7140.4(2.9) keV, in agreement with recent measurements.
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the lebit 9 4 t Penning Trap mass spectrometer
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment, 2009Co-Authors: Ryan Ringle, Peter Schury, G. Bollen, A. Prinke, J Savory, S Schwarz, T. SunAbstract:Presented is a detailed description of the LEBIT 9.4 T Penning Trap mass spectrometer installed at the NSCL, located at Michigan State University. LEBIT is the first facility designed to perform mass measurements of rare isotopes produced via projectile fragmentation of stable, relativistic primary beams. Due to the short half-lives and low production rates of rare isotopes far from the valley of stability the LEBIT Penning Trap mass spectrometer has been optimized for high precision in short measurement times. The employment of a 9.4 T magnetic field, a high-precision electrode system, fast magnetron orbit preparation, stabilization of the magnetic field, and in-flight beam purification of non-isobaric contaminants all contribute to this end.
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Electric and magnetic field optimization procedure for Penning Trap mass spectrometers
Nuclear Instruments and Methods in Physics Research Section A: Accelerators Spectrometers Detectors and Associated Equipment, 2009Co-Authors: D Beck, K. Blaum, G. Bollen, F Herfurth, A Herlert, D. Lunney, S George, P. Delahaye, C. Guenaut, L. SchweikhardAbstract:Significant systematic errors in high-precision Penning Trap mass spectrometry can result from electric- and magnetic-field imperfections. An experimental procedure to minimize these uncertainties is presented for the on-line Penning Trap mass spectrometer ISOLTrap, located at ISOLDE/CERN. The deviations from the ideal magnetic and electric fields are probed by measuring the cyclotron frequency and the reduced cyclotron frequency, respectively, of stored ions as a function of the time between the ejection of ions from the preparation Trap and their capture in the precision Trap, which influences the energy of their axial motion. The correction parameters are adjusted to minimize the frequency shifts. (C) 2008 Elsevier B.V. All rights reserved.
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isolTrap an on line Penning Trap for mass spectrometry on short lived nuclides
European Physical Journal A, 2008Co-Authors: M Mukherjee, K. Blaum, G. Bollen, F Herfurth, A Herlert, J Dilling, D Beck, S George, A Kellerbauer, H.-j. KlugeAbstract:ISOLTrap is a Penning Trap mass spectrometer for high-precision mass measurements on short-lived nuclides installed at the on-line isotope separator ISOLDE at CERN. The masses of close to 300 radionuclides have been determined up to now. The applicability of Penning Trap mass spectrometry to mass measurements of exotic nuclei has been extended considerably at ISOLTrap by improving and developing this double Penning Trap mass spectrometer over the past two decades. The accurate determination of nuclear binding energies far from stability includes nuclei that are produced at rates less than 100 ions/s and with half-lives well below 100ms. The mass-resolving power reaches 107 corresponding to 10keV for medium heavy nuclei and the uncertainty of the resulting mass values has been pushed down to below 10-8. The article describes technical developments achieved since 1996 and the present performance of ISOLTrap.
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High-precision masses of neutron-deficient rubidium isotopes using a Penning Trap mass spectrometer
Physical Review C, 2007Co-Authors: A Kellerbauer, K. Blaum, G. Bollen, F Herfurth, A Herlert, G. Audi, D Beck, C. Guenaut, H J Kluge, D. LunneyAbstract:The atomic masses of the neutron-deficient radioactive rubidium isotopes $^{74-77,79,80,83}$Rb have been measured with the Penning Trap mass spectrometer ISOLTrap. Using the time-of-flight cyclotron resonance technique, relative mass uncertainties ranging from 1.6×10$^{-8}$ to 5.6×10$^{-8}$ were achieved. In all cases, the mass precision was significantly improved as compared with the prior Atomic-Mass Evaluation; no significant deviations from the literature values were observed. The exotic nuclide $^{74}$Rb, with a half-life of only 65 ms, is the shortest-lived nuclide on which a high-precision mass measurement in a Penning Trap has been carried out. The significance of these measurements for a check of the conserved-vector-current hypothesis of the weak interaction and the unitarity of the Cabibbo-Kobayashi-Maskawa matrix is discussed.
J Dilling - One of the best experts on this subject based on the ideXlab platform.
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vacuum requirements for Penning Trap mass spectrometry with highly charged ions
Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms, 2020Co-Authors: A. A. Kwiatkowski, J Dilling, E LeistenschneiderAbstract:Abstract Experimental investigations employing highly charged ions (HCI) typically require very strict vacuum quality. In Penning Trap mass spectrometry (PTMS), HCI can significantly improve the precision and resolution of mass measurements, but they are also subject to charge-exchange reactions with neutral gas particles, which may hamper the quality of the measurement. In this study, we employed a simple method to determine that the maximum pressure levels required for an undisturbed PTMS measurement of HCI is on the order of 10 - 11 mbar. We also evaluate the residual gas pressure in the Penning Trap mass spectrometer at TITAN facility by measuring the rate of charge-exchange reactions with HCI, revealing that the Trap’s vacuum must be improved in about two orders of magnitude to reach the desired level.
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Penning Trap mass measurements in atomic and nuclear physics
Annual Review of Nuclear and Particle Science, 2018Co-Authors: Klaus Blaum, M. Brodeur, J Dilling, S EliseevAbstract:Penning-Trap mass spectrometry in atomic and nuclear physics has become a well-established and reliable tool for the determination of atomic masses. In combination with short-lived radioactive nucl...
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isolTrap an on line Penning Trap for mass spectrometry on short lived nuclides
European Physical Journal A, 2008Co-Authors: M Mukherjee, K. Blaum, G. Bollen, F Herfurth, A Herlert, J Dilling, D Beck, S George, A Kellerbauer, H.-j. KlugeAbstract:ISOLTrap is a Penning Trap mass spectrometer for high-precision mass measurements on short-lived nuclides installed at the on-line isotope separator ISOLDE at CERN. The masses of close to 300 radionuclides have been determined up to now. The applicability of Penning Trap mass spectrometry to mass measurements of exotic nuclei has been extended considerably at ISOLTrap by improving and developing this double Penning Trap mass spectrometer over the past two decades. The accurate determination of nuclear binding energies far from stability includes nuclei that are produced at rates less than 100 ions/s and with half-lives well below 100ms. The mass-resolving power reaches 107 corresponding to 10keV for medium heavy nuclei and the uncertainty of the resulting mass values has been pushed down to below 10-8. The article describes technical developments achieved since 1996 and the present performance of ISOLTrap.
F Herfurth - One of the best experts on this subject based on the ideXlab platform.
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damping effects in Penning Trap mass spectrometry
International Journal of Mass Spectrometry, 2011Co-Authors: Michael Block, M. Dworschak, Sebastian George, Klaus Blaum, M Breitenfeldt, F Herfurth, A Herlert, Magdalena KowalskaAbstract:Abstract Collisions of ions with residual gas atoms in a Penning Trap can have a strong influence on the trajectories of the ions, depending on the atom species and the gas pressure. We report on investigations of damping effects in time-of-flight ion-cyclotron resonance mass spectrometry with the Penning Trap mass spectrometers ISOLTrap at ISOLDE/CERN (Geneva, Switzerland) and SHIPTrap at GSI (Darmstadt, Germany). The work focuses on the interconversion of the magnetron and cyclotron motional modes, in particular the modification of the resonance profiles for quadrupolar excitation due to the damping effect of the residual gas. Extensive experiments have been performed with standard and Ramsey excitation schemes. The results are in good agreement with predictions obtained by analytical continuation of the formulae for the undamped case.
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Penning Trap mass measurements on nobelium isotopes
Physical Review C, 2010Co-Authors: M. Dworschak, K. Blaum, S Eliseev, G. Audi, M. Block, D. Ackermann, C. Droese, T. Fleckenstein, E. Haettner, F HerfurthAbstract:The Penning Trap mass spectrometer SHIPTrap at GSI Darmstadt allows accurate mass measurements of radionuclides, produced in fusion-evaporation reactions and separated by the velocity filter SHIP from the primary beam. Recently, the masses of the three nobelium isotopes (252-254)No were determined. These are the first direct mass measurements of transuranium elements, which provide new anchor points in this region. The heavy nuclides were produced in cold-fusion reactions by irradiating a PbS target with a (48)Ca beam, resulting in production rates of the nuclei of interest of about one atom per second. In combination with data from decay spectroscopy our results are used to perform a new atomic-mass evaluation in this region.
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Mass measurements of short-lived nuclides using the ISOLTrap preparation Penning Trap
2010Co-Authors: S. Naimi, K. Blaum, M Breitenfeldt, F Herfurth, G. Audi, S George, M. Rosenbusch, C. Böhm, C. Borgmann, A HerlertAbstract:For exotic nuclear species, short decay half-lives make precision mass measurements particularly challenging. Combining isobaric purification and themass measurement in the same Trap may offer an interesting compromise between losses due to half-life and measurement precision. Here we discuss a mass measurement performed in a preparation Penning Trap, and perform a study of the resonance lineshape.
-
Recent developments in ion detection techniques for Penning Trap mass spectrometry at TRIGA-Trap
The European Physical Journal A, 2009Co-Authors: Jens Ketelaer, Michael Block, Jochen Ketter, K. Blaum, Rafael Ferrer, F Herfurth, S George, K. Eberhardt, M. Eibach, Sz. NagyAbstract:The highest precision in the determination of nuclear and atomic masses can be achieved by Penning Trap mass spectrometry. The mass value is obtained through a measurement of the cyclotron frequency of the stored charged particle. Two different approaches are used at the Penning Trap mass spectrometer TRIGA-Trap for the mass determination: the destructive Time-Of-Flight Ion Cyclotron Resonance (TOF-ICR) technique and the non-destructive Fourier Transform Ion Cyclotron Resonance (FT-ICR) method. New developments for both techniques are described, which will improve the detection efficiency and the suppression of contaminations in the case of TOF-ICR. The FT-ICR detection systems will allow for the investigation of an incoming ion bunch from a radioactive-beam facility on the one hand, and for the detection of a single singly charged ion in the Penning Trap on the other hand.
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Electric and magnetic field optimization procedure for Penning Trap mass spectrometers
Nuclear Instruments and Methods in Physics Research Section A: Accelerators Spectrometers Detectors and Associated Equipment, 2009Co-Authors: D Beck, K. Blaum, G. Bollen, F Herfurth, A Herlert, D. Lunney, S George, P. Delahaye, C. Guenaut, L. SchweikhardAbstract:Significant systematic errors in high-precision Penning Trap mass spectrometry can result from electric- and magnetic-field imperfections. An experimental procedure to minimize these uncertainties is presented for the on-line Penning Trap mass spectrometer ISOLTrap, located at ISOLDE/CERN. The deviations from the ideal magnetic and electric fields are probed by measuring the cyclotron frequency and the reduced cyclotron frequency, respectively, of stored ions as a function of the time between the ejection of ions from the preparation Trap and their capture in the precision Trap, which influences the energy of their axial motion. The correction parameters are adjusted to minimize the frequency shifts. (C) 2008 Elsevier B.V. All rights reserved.
