Helmut Soltner
YOU?
Author Swipe
View article: Distributed Current Injection into a One-Dimensional Ballistic Edge Channel
Distributed Current Injection into a One-Dimensional Ballistic Edge Channel Open
We generalize Landauer’s theory of ballistic transport in a one-dimensional (1D) conductor to situations where charge carrier injection and extraction are not any more confined to electrodes at either end of the channel, but may occur alon…
View article: Eliminating beam-induced depolarizing effects in the hydrogen jet target for high-precision proton beam polarimetry at the Electron-Ion Collider
Eliminating beam-induced depolarizing effects in the hydrogen jet target for high-precision proton beam polarimetry at the Electron-Ion Collider Open
We analyze beam-induced depolarizing effects in the hydrogen jet target (HJET) at the Relativistic Heavy Ion Collider (RHIC) that has been used for absolute hadron beam polarimetry and shall be employed at the Electron-Ion Collider (EIC). …
View article: Proof-of-principle demonstration of a pilot bunch comagnetometer in a stored beam
Proof-of-principle demonstration of a pilot bunch comagnetometer in a stored beam Open
In polarization experiments at storage rings, one of the challenges is to maintain the spin-resonance condition of a radio-frequency spin rotator with the spin precessions of the orbiting particles. Time-dependent variations of the magneti…
View article: Maintaining a resonance condition of an rf spin rotator through a feedback loop in a storage ring
Maintaining a resonance condition of an rf spin rotator through a feedback loop in a storage ring Open
This paper presents the successful application of a phase-lock feedback system to maintain the resonance condition of a radio frequency (rf) spin rotator (specifically, an rf Wien filter) with respect to a 120 kHz spin precession in the Co…
View article: HESEB Soft X-ray Beamline ID11-L at SESAME: Performance and First User Experiments
HESEB Soft X-ray Beamline ID11-L at SESAME: Performance and First User Experiments Open
The ID11-L HESEB Soft X-ray beamline and end station significantly enhance soft X-ray research capabilities. Operating in an energy range of 90–1800 eV, extendable to 70–2000 eV, the beamline achieves high performance with an energy resolu…
View article: New Insights into Sona Transitions
New Insights into Sona Transitions Open
The Sona method, described in 1968 by Peter Sona, has been used in polarized sources of the Lamb-shift type and is still important at optically pumped ion sources, e.g. at BNL. The trick of this method is that an electron polarization of a…
View article: Compact beam position monitor using a segmented toroidal coil
Compact beam position monitor using a segmented toroidal coil Open
An inductive compact beam position monitor based on a segmented toroidal coil surrounding the charged particle beam has been investigated. It makes use of the induced voltages in the windings instead of the induced charge imbalance on capa…
View article: Distributed Current Injection into a One-Dimensional Ballistic Edge Channel
Distributed Current Injection into a One-Dimensional Ballistic Edge Channel Open
We generalize Landauer's theory of ballistic transport in a one-dimensional (1D) conductor to situations where charge carrier injection and extraction are not any more confined to electrodes at either end of the channel, but may occur alon…
View article: Further development of a Lamb-shift polarimeter
Further development of a Lamb-shift polarimeter Open
The Lamb-shift polarimeter (LSP) is a useful detection apparatus to verify nuclear spin polarization for atoms, molecules and ions consisting of hydrogen and/or its isotopes. Its functionality relies on the creation of metastable hydrogen …
View article: Development of a complete spin filter for metastable hydrogen atoms and its isotopes
Development of a complete spin filter for metastable hydrogen atoms and its isotopes Open
Since the early days of quantum mechanics, hydrogen, as the simplest of all atoms, has been studied or used to investigate new physics. In the past this knowledge has been applied to develop a polarimeter where the initial nuclear polariza…
View article: Spin decoherence and off-resonance behavior of radio-frequency-driven spin rotations in storage rings
Spin decoherence and off-resonance behavior of radio-frequency-driven spin rotations in storage rings Open
High-frequency driven resonant spin rotators are routinely used as standard instruments in polarization experiments in particle and nuclear physics. Maintaining the continuous exact parametric spin resonance condition of the equality of th…
View article: Compact beam position monitor using a segmented toroidal coil
Compact beam position monitor using a segmented toroidal coil Open
A new, compact beam position monitor based on segmented a toroidal coil surrounding the charged particle beam has been investigated. It makes use of the induced voltages in the windings instead of the induced charge imbalance on capacitor …
View article: Theoretical development of a new spin filter generation
Theoretical development of a new spin filter generation Open
Since the early days of quantum mechanics hydrogen, as the simplest of all atoms, has been studied or used to investigate new physics. In parallel, this knowledge leads to different applications, e.g. a spin filter to separate metastable h…
View article: First test of a polarized $^3$He$^+$ ion source
First test of a polarized $^3$He$^+$ ion source Open
Polarized $^3$He ions have promising applications in nuclear physics as an ideal substitute for polarized neutron beams, and in fusion research as fuel for polarized nuclear fusion. However, current methods are limited in achievable intens…
View article: A Universal Method to Generate Hyperpolarisation in Beams and Samples
A Universal Method to Generate Hyperpolarisation in Beams and Samples Open
Sizable hyperpolarisation, i.e. an imbalance of the occupation numbers of nuclear spins in a sample deviating from thermal equilibrium, is needed in various fields of science. For example, hyperpolarised tracers are utilised in magnetic re…
View article: Practical Concepts for Design, Construction and Application of Halbach Magnets in Magnetic Resonance
Practical Concepts for Design, Construction and Application of Halbach Magnets in Magnetic Resonance Open
This review is a compilation of relevant concepts in designing Halbach multipoles for magnetic resonance applications. The main focus is on providing practical guidelines to plan, design and build such magnets. Therefore, analytical equati…
View article: Preservation of $^3\mkern-2mu$He ion polarization after laser-plasma acceleration
Preservation of $^3\mkern-2mu$He ion polarization after laser-plasma acceleration Open
The preservation of nuclear spin alignment in plasmas is a prerequisite for important applications, such as energy production through polarized fusion or the acceleration of polarized particle beams. Although this conservation property has…
View article: Spin decoherence and off-resonance behavior of radiofrequency-driven spin rotations in storage rings
Spin decoherence and off-resonance behavior of radiofrequency-driven spin rotations in storage rings Open
Radiofrequency-driven resonant spin rotators are routinely used as standard instruments in polarization experiments in particle and nuclear physics. Maintaining the continuous exact parametric spin-resonance condition of the equality of th…
View article: Pilot bunch and co-magnetometry of polarized particles stored in a ring
Pilot bunch and co-magnetometry of polarized particles stored in a ring Open
In polarization experiments at storage rings, one of the challenges is to maintain the spin-resonance condition of a radio-frequency spin rotator with the spin-precessions of the orbiting particles. Time-dependent variations of the magneti…
View article: First Search for Axionlike Particles in a Storage Ring Using a Polarized Deuteron Beam
First Search for Axionlike Particles in a Storage Ring Using a Polarized Deuteron Beam Open
Based on the notion that the local dark-matter field of axions or axionlike particles (ALPs) in our Galaxy induces oscillating couplings to the spins of nucleons and nuclei (via the electric dipole moment of the latter and/or the paramagne…
View article: Practical Concepts for Design, Construction and Application of Halbach Magnets in Magnetic Resonance
Practical Concepts for Design, Construction and Application of Halbach Magnets in Magnetic Resonance Open
This review is a compilation of relevant concepts in designing Halbach multipoles for magnetic resonance applications. The main focus is on providing practical guidelines to plan, design and build such magnets. Therefore, analytical equati…
View article: Determining the temperature of a millikelvin scanning tunnelling microscope junction
Determining the temperature of a millikelvin scanning tunnelling microscope junction Open
Cooling the junction of a scanning tunneling microscope to millikelvin temperatures is fundamental for high-resolution scanning tunneling spectroscopy. However, accurately determining the junction temperature has proven elusive, due to the…
View article: Rogowski Beam Position Monitor
Rogowski Beam Position Monitor Open
The Jülich Electrical Dipole Moment Investigations (JEDI) Collaboration performed the first direct measurement of a charged hadron Electric Dipole Moment (EDM). These investigations were carried out using polarized deuteron beams at the CO…
View article: Measurement of the occupation number of metastable atoms in the hyperfine-substate β$_3$ in an atomic hydrogen beam
Measurement of the occupation number of metastable atoms in the hyperfine-substate β$_3$ in an atomic hydrogen beam Open
After its discovery in 1947 by Willis Eugene Lamb and Robert C. Retherford the Lamb shift was used to create Lamb shift polarimeter to separate the $2S_{1/2}$ $\\alpha_{1}$ and $\\alpha_{2}$ hyperfine\nsubstates of hydrogen as well as the …
View article: Hyperfine-spectroscopy measurement of metastable hydrogen atoms with a Sona-transition unit
Hyperfine-spectroscopy measurement of metastable hydrogen atoms with a Sona-transition unit Open
During the last 60 years, Sona transition devices have been used to invert the occupation numbers of pure states by a rapidly changing magnetic field across a zero crossing point. The inversion of the magnetic quantisation axis changes fas…
View article: How cold is the junction of a millikelvin scanning tunnelling microscope?
How cold is the junction of a millikelvin scanning tunnelling microscope? Open
We employ a scanning tunnelling microscope (STM) cooled to millikelvin temperatures by an adiabatic demagnetization refrigerator (ADR) to perform scanning tunnelling spectroscopy (STS) on an atomically clean surface of Al(100) in a superco…