Chapter 7 HITRAP: A Facility at GSI for Highly Charged Ions

Kluge, H. J.; Beier, Thomas; Blaum, Klaus; Dahl, L.; Eliseev, Sergey; Herfurth, F.; Hofmann, B.; Kester, O.; Koszudowski, S.; Kozhuharov, C.; Maero, G.; Nörtershäuser, W.; Pfister, J.; Quint, W.; Ratzinger, U.; Schempp, A.; Schuch, R.; Stöhlker, Th.; Thompson, R. C.; Vogel, Manuel; Vorobjev, G.; Winters, D.; Werth, G.

doi:10.1016/s0065-3276(07)53007-8

Cited by 115 publications

(63 citation statements)

References 51 publications

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“…It is planned to extract these ions, slow them down and inject then into a Penning trap for further investigation. A description of this HITRAP project can be found in [79].…”

Section: Future Experimentsmentioning

confidence: 99%

Electron g‐factor determinations in Penning traps

2013

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The magnetic moment of the electron, expressed by the g-factor in units of the Bohr magneton, is a key quantity in the theory of quantum electrodynamics (QED). Experiments using single particles confined in Penning traps have provided very precise values of the g-factor for the free electron as well as the electron bound in hydrogen-like ions. In this paper the status of these experiments is reviewed. The results allow testing calculations of higher order Feynman diagrams. Comparison of experimental and theoretical results for free and bound particles show no discrepancy within the limits of error, thus representing to date the most sensitive test of QED. Moreover, the g-factor provides a unique access to fundamental constants, as e.g. the electron mass or the fine structure constant.

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“…It is planned to extract these ions, slow them down and inject then into a Penning trap for further investigation. A description of this HITRAP project can be found in [79].…”

Section: Future Experimentsmentioning

confidence: 99%

Electron g‐factor determinations in Penning traps

2013

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“…An upgrade of this device, planned for the near future, will enable the production of bare uranium. Future prospects include plans to move the Pentatrap mass spectrometer to the Hitrap facility [45] at the Helmholtzzentrum für Schwerionenforschung GSI, where access to low-emittance beams of highly charged shortlived ions up to bare uranium with charge-specific kinetic energies of only a few kV·q will be provided. An approximately 2 meter long ion beamline will interface the Dresden-EBIT3 ion source with the Penning traps (see Fig.…”

Section: Ion Sourcesmentioning

confidence: 99%

“…Two pulsed drift tubes are used for a reduction of the kinetic energy of the ions from a few kV·q down to few V·q to ensure, together with the lens system, an efficient injection of the ions into the magnetic field, and to enable a capture of the ions in the traps. The ion transport from the ion sources to the magnet, the injection into the magnetic field, and the capture of the ions into [45]. The ions will pass the beamline towards the superconducting magnet, which is situated in a temperature-stabilized and pressure-regulated room in the basement.…”

Section: Ion Sourcesmentioning

confidence: 99%

PENTATRAP: a novel cryogenic multi-Penning-trap experiment for high-precision mass measurements on highly charged ions

et al. 2012

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The novel five-Penning trap mass spectrometer Pentatrap is developed at the Max-Planck-Institut für Kernphysik (MPIK), Heidelberg. Ions of interest are long-lived highly charged nuclides up to bare uranium. Pentatrap aims for an accuracy of a few parts in 10 12 for mass ratios of mass doublets. A physics program for Pentatrap includes Q-values measurements of β-transitions relevant for neutrino physics, stringent tests of quantum electrodynamics in the regime of extreme electric fields, and a test of special relativity. Main features of Pentatrap are an access to a source of highly charged ions, a multi-trap configuration, simultaneous measurements of frequencies, a continuous precise monitoring of magnetic field fluctuations, a fast exchange between different ions, and a highly sensitive cryogenic non-destructive detection system. This paper gives a motivation for the new mass spectrometer Pentatrap, presents its experimental setup, and describes the present status.

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“…Therefore, this geometry has become very popular in recent years and is widely used at various Penning trap experiments like high-precision mass measurements, see e.g. [1,2] and references therein, g-factor measurements of the bound electron and the proton [17] as well as the free electron and the positron [18], cooling of highly charged ions [19] or the capture of anti-protons [20] and for the production of anti-hydrogen [21,22]. If very high frequency resolution has to be achieved, it is essential that the electrostatic potential is harmonic along the trap axis to ensure that the axial frequency is independent of the energy of the ion.…”

Section: Cylindrical Penning Trapsmentioning

confidence: 99%

The trap design of PENTATRAP

et al. 2011

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A novel Penning trap tower consisting of five compensated cylindrical Penning traps is developed for the PENTATRAP mass spectrometer at the MaxPlanck-Institut für Kernphysik in Heidelberg, Germany. An analytical expression for the electrostatic potential inside the trap tower is derived to calculate standard Penning trap properties like the compensation of anharmonicities and an orthogonal geometry of the trap electrodes. Since the PENTATRAP project described in the preceding article aims for ultra high-precision massratio measurements of highly charged ions up to uranium, systematic effects for highly charged ions inside the trap tower are considered for the design process as well. Finally, a limit due to remaining anharmonic shifts at large amplitudes is estimated for the resulting geometry, which is important for phase-sensitive measurements of the reduced cyclotron frequency of the ions.

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Chapter 7 HITRAP: A Facility at GSI for Highly Charged Ions

Cited by 115 publications

References 51 publications

Electron g‐factor determinations in Penning traps

Electron g‐factor determinations in Penning traps

PENTATRAP: a novel cryogenic multi-Penning-trap experiment for high-precision mass measurements on highly charged ions

The trap design of PENTATRAP

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