Manuel Vogel

Manuel Vogel
GSI Helmholtzzentrum für Schwerionenforschung | GSI · Atomic physics

PhD

About

242
Publications
370,804
Reads
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1,972
Citations
Additional affiliations
April 2014 - present
GSI Helmholtzzentrum für Schwerionenforschung
Position
  • Researcher
April 2011 - April 2014
Technische Universität Darmstadt
Position
  • Researcher
April 2008 - April 2011
Imperial College London
Position
  • Research Associate

Publications

Publications (242)
Article
We have studied the cooling dynamics, formation process and geometric structure of mesoscopic crystals of externally produced magnesium ions in a Penning trap. We present a cooling model and measurements for a combination of buffer gas cooling and laser cooling which has been found to reduce the ion kinetic energy by eight orders of magnitude from...
Article
Full-text available
We present measurements of resistive and sympathetic cooling of ion clouds confined in a Penning trap. For resistive cooling of a cloud consisting of one ion species, we observe a significant deviation from exponential cooling behavior which is explained by an energy-transfer model. The observed sympathetic cooling of simultaneously confined ion sp...
Article
Full-text available
Highly charged ions represent environments that allow to study precisely one or more bound electrons subjected to unsurpassed electromagnetic fields. Under such conditions, the magnetic moment (g-factor) of a bound electron changes significantly, to a large extent due to contributions from quantum electrodynamics. We present three Penning-trap expe...
Book
Full-text available
Particle traps are successful tools for a broad range of high-precision spectroscopy experiments on all frequency scales. Single particles or defined particle ensembles can be well-isolated from external influences, prepared with respect to their internal and external states and confined for times up to months. Traps provide a multitude of manipula...
Article
Full-text available
The value of the electron's magnetic moment is a fundamental quantity in physics. Its deviation from the value expected from Dirac theory has given enormous impetus to the field of quantum theory and especially to quantum electrodynamics (QED) as the relativistic quantum field theory of electrodynamics. In fact, the measured values both for free an...
Article
Full-text available
We have conceived and built the HILITE (High-Intensity Laser-Ion Trap Experiment) Penning-trap setup for the production, confinement and preparation of pure ensembles of highly charged ions in a defined quantum state as a target for various high-intensity lasers. This enables a broad suite of laser-ion interaction studies at high photon energies an...
Article
Full-text available
Synopsis We present non-destructive single-pass ion bunch detection and characterisation by measuring the induced image charge in a detection electrode. The presented technique allows direct determination of ion kinetic energy, absolute ion number and spatial ion bunch length. We will show the results of corresponding measurements with bunches of l...
Article
Full-text available
Synopsis We present a Penning-trap-based setup for the study of light-matter interactions in the high-power and/or high-intensity laser regime, such as multi-photon ionization and field ionization. The setup applies ion-cloud formation techniques to highly charged ions to the end of specific target preparation, as well as non-destructive detection...
Article
We have devised an experimental method and apparatus for the simultaneous nondestructive determination of the absolute ion number, ion kinetic energy, and length of bunches of charged particles. We have built and operated a corresponding electronic detector that is based on induced charges and their subsequent low-noise amplification at cryogenic t...
Article
Full-text available
We describe the results of analytical calculations and numerical simulations of the confinement properties of a mechanically compensated cylindrical Penning trap which has conical endcap openings for large-solid-angle access for example with highly focused laser beams. While the analytical calculations show that under the common geometrical conditi...
Article
Detailed investigations of laser–ion interactions require well‐defined ion targets and detection techniques for high‐sensitivity measurements of reaction educts and products. To this end, we have designed and built the High‐Intensity Laser‐Ion Trap Experiment Penning trap setup, which features various ion‐target preparation techniques including sel...
Article
Full-text available
Article
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The hyperfine splitting in heavy highly charged ions provide the means to test QED in extremely strong magnetic fields. In order to provide a meaningful test, the splitting has to be measured in H-like and Li-like ions to remove uncertainties from nuclear structure. This has been achieved at the experimental storage ring ESR but a discrepancy to th...
Poster
Full-text available
We present a non-destructive charge sensitive ion detection scheme. The HILITE setup contains two such detectors. We show first commissioning results and use one detector to characterize ion deceleration.
Poster
Full-text available
We present the current status und first commissioning results of our Penning trap designed to prepare a well-defined ion-target for experiments with high-intensity and high photon-energy lasers.
Article
Full-text available
We perform a detailed experimental study of resistive cooling of large ensembles of highly charged ions such as Ar13+ in a cryogenic Penning trap. Different from the measurements reported by Vogel et al. [M. Vogel et al., Phys. Rev. A 90, 043412 (2014)], we observe purely exponential cooling behavior when conditions are chosen to allow collisional...
Book
Full-text available
Penning traps have established themselves as premier tools for high-precision spectroscopy in the radio frequency, optical and microwave domains. They facilitate mass measurements of elements and their isotopes, measurements of magnetic moments of the electron / positron, of the proton / antiproton and of the bound electron. In that, they yield acc...
Chapter
The particle number density and shape of an ensemble of confined in a Penning trap can be controlled by the so-called ‘rotating wall technique’, which is a specific, non-resonant excitation of the ensemble’s rotation. Here, we briefly discuss the requirements, technical implementations, and the phenomenology of such a rotating wall, mainly when use...
Chapter
This chapter gives a brief account of the history of the Penning trap, the central characters involved in its development, and presents the main fields of operation of such traps together with a discussion of the sense in which the word ‘confinement’ needs to be understood in this context. It also clarifies some of the most important terminology an...
Chapter
This chapter takes a look at the effects and possible implementations of specific magnetic field geometries, mainly of so-called ‘magnetic bottles’ which are a key ingredient to the application of the continuous Stern-Gerlach effect in Penning traps.
Chapter
This chapter gives a short review of the spectroscopic techniques that are specific to Penning traps, since they make dedicated use of the confining fields and their controllable properties. In particular, we show how precise measurements of the oscillation frequencies of particles in the radio-frequency domain may be used to infer spectroscopic in...
Chapter
Oscillatory motions of confined particles can be resonantly excited by a suited electromagnetic excitation at the frequency of the respective motion. This refers to individual axial and radial oscillation frequencies of single particles or particle ensembles, excitation of sidebands for motional coupling, and also to collective frequencies of ensem...
Chapter
This chapter is concerned with the motion that is performed by a single confined test particle in a Penning trap. For now we disregard any realisation of a Penning trap and see it as the abstract combination of an ideally homogeneous static magnetic field \(B_0\) perfectly aligned with a quadrupolar electrostatic potential U that creates a harmonic...
Chapter
The possibility to cool the motions of confined particles is one key motivation for the use of Penning traps, particularly in precision spectroscopy in any frequency domain. Here, we discuss the notion of a particle temperature, its measurement in different experimental situations, and review the most important cooling techniques applied in Penning...
Chapter
This chapter briefly reviews the measurements of magnetic moments that have been performed by application of the continuous Stern-Gerlach effect to a single particle confined in a Penning trap with a magnetic bottle.
Chapter
In this chapter, we take a look at the non-destructive detection of confined particles and the measurement of their oscillation frequencies by use of resonant electronic circuits. This includes superconducting circuits and their properties in the external magnetic field of the Penning trap.
Chapter
The oldest Penning trap geometry in use is the hyperbolic shape, which provides good confinement properties by design, however was difficult to machine to high precisions at the time of its introduction, and offers limited access for particles and laser beams. Thus, cylindrical designs were brought forward, including more open structures. Here, we...
Chapter
In the previous chapter, we have discussed the effects of field imperfections on the motion of a single confined particle in a Penning trap. These effects can in principle be avoided, and can in reality be minimised by careful choice of parameters and of the trap manufacturing details. Here, we will discuss effects that are inherent to the confinem...
Chapter
In special situations, optical and microwave spectroscopy can be combined to constitute a powerful tool that uses the high spectral resolution of the microwaves and the good detection properties of optical light. Here, we briefly discuss its application to the determination of magnetic moments of the nucleus and the electron bound in highly charged...
Chapter
In contrast to the situation with a single particle in a trap, the presence of many charged particles gives rise to long-range particle-particle interactions, collective effects, and partial shielding of the trap potential that leads to shifts of the oscillation frequencies. Here, we briefly discuss the most important collective effects and review...
Chapter
Confinement of particles in Penning traps yields two major advantages for spectroscopy, namely localisation for extended periods (i.e. the particle position is constant and well-known) and cooling (which leads to small Doppler shifts and broadening of transitions). Also, the particle ensemble can often be treated as a point-like source, which facil...
Chapter
Particle oscillations in different motional degrees of freedom in the Penning trap can purposefully be resonantly coupled by suitable electromagnetic radiation. Here, we briefly discuss the phenomenology and the main applications.
Chapter
Deviations from the idealised situation described in Chap. 5 as they are present in real Penning traps give rise to a number of effects. Some of these can be minimized by efforts to approach the ideal situation as closely as possible. Others are inherent to the situation and cannot be avoided or circumvented, and we will discuss them in the next ch...
Chapter
In this chapter, we have a look at the concepts involved in Penning-trap confinement, and the way in which the concepts can be implemented. It compares the confinement situation in Penning traps to those of other types of confinement such as in optical and acoustic traps, and shows the most important features of experimental implementations of Penn...
Chapter
Obviously, there are two options to arrive at a situation in which particles can be confined, namely to produce them inside the trap where they remain confined, or to capture and confine particles that have been produced externally. We will see that internal production is somewhat limited in terms of the available particle species that may be produ...
Chapter
Since non-destructive particle detection and frequency measurements in a Penning trap rely on image charges, we look at the amount of image charge and current created in different situations. This discussion naturally leads to a quantitative description of space charge and image charge effects.
Chapter
Microwave spectroscopy of confined particles in Penning traps is mainly applied to magnetic dipole transitions in various contexts. The strong magnetic field of the Penning trap gives rise to significant spin orientation energies and to Zeeman splitting of lines, which can be used for precision spectroscopy of magnetic dipole transitions and the de...
Chapter
In this chapter, we briefly have a look at a number of variations on the idea of a Penning trap, i.e. at specific deviations from the combination of a homogeneous magnetostatic field with an aligned quadrupolar electrostatic potential. We discuss only those designs that use magnetic and electric fields, i.e. we are not concerned with Paul traps, Ki...
Chapter
This chapter takes a short look at mass spectrometry in Penning traps, which to some extent is one specific application of radio-frequency spectroscopy of the particle oscillations in the trap. We have a brief look at precision mass spectrometry, and then discuss mass spectrometry as an analytical tool for a quantitative determination of the trap c...
Article
Full-text available
We have conceived, built, and operated a cryogenic Penning trap with an electrically conducting yet optically transparent solid electrode. The trap, dedicated to spectroscopy and imaging of confined particles under large solid angles, is of “half-open” design with one open endcap and one closed endcap that mainly consists of a glass window coated w...
Article
We have studied the formation and properties of two-species ion Coulomb crystals in the Penning trap of the SpecTrap experiment. These crystals have been formed by injection of admixture ions from an external source into a previously confined and laser-cooled cloud of magnesium ions. This kind of study, performed over a range of the admixture ions’...
Chapter
Heavy few-electron ions are relatively simple systems in terms of electron structure and offer unique opportunities to conduct experiments under extremely large electromagnetic fields that exist around their nuclei. However, the preparation of highly charged ions (HCI) has remained the major challenge for experiments. As an extension of the existin...
Chapter
We present two Penning trap experiments concerned with different aspects of the physics of extreme electromagnetic fields, the ARTEMIS experiment designed for boundelectron magnetic moment measurements in the presence of the extremely strong fields close to the nucleus of highly charged ions, and the HILITE experiment, in which welldefined ion targ...
Article
Full-text available
World Scientific, Singapore advanced undergraduate students and above Manuel Vogel, GSI Darmstadt, m.vogel@gsi.de This is the first volume of the new 'Peking University-World Scientific Advance Physics Series', which is a collaborative effort of the Peking University Press with the World Scientific Publishing Company. It is the intention of this se...
Article
We have measured the characteristics of a superconducting radio-frequency resonator in an external magnetic field. The magnetic field strength has been varied with 10 mT resolution between zero and 6 T. The resonance frequency and the quality factor of the resonator have been found to change significantly as a function of the magnetic field strengt...
Article
We have built, operated, and characterized a compact ion source for low-energy bunches of singly charged atomic ions in a vacuum beam line. It is based on atomic evaporation from an electrically heated oven and ionization by electron impact from a heated filament inside a grid-based ionization volume. An adjacent electrode arrangement is used for i...
Article
Full-text available
Article
Full-text available
We have conceived, built, and operated a device for the non-destructive single-pass detection of charged particles in a beamline. The detector is based on the non-resonant pick-up and subsequent low-noise amplification of the image charges induced in a cylindrical electrode surrounding the particles' beam path. The first stage of the amplification...
Article
Full-text available
We are currently devising the open-endcap Penning trap experiment (high-intensity laser ion-trap experiment) as a tool for ion confinement, manipulation and detection to be used at high-energy and/or high-intensity laser facilities. This instrument will allow studies of laser–ion interactions with well-defined ion targets, and to detect the reactio...
Article
Full-text available
Highly charged ions offer the possibility to measure electronic fine structures and hyperfine structures with precisions of optical lasers. Microwave spectroscopy of transitions between Zeeman substates further yields magnetic moments (g-factors) of bound electrons, making tests of calculations in the framework of bound-state QED possible in the st...

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Projects

Projects (4)
Project
SpecTrap is a Penning-trap experiment for optical spectroscopy of externally produced ions, in particular of cooled highly charged ions
Project
HILITE (High-Intensity Laser Ion-Trap Experiment) is a Penning trap, which compromises several techniques to form a well-defined ion-cloud to support an ion target for laser - ion experiments. HILITE is a cylindrical open-endcap trap to have access from both sides to couple high-intensity lasers into the trap and capture ions out of an EBIT or a beamline. Therefore it is also equipped with a deceleration stage for dynamic ion capture. We will also apply non-destructive techniques for ion detection and ion counting. As the setup is designed to be transportable, we will be able to use it at different laser-facilities.