A5031832054- Atomic and Subatomic Physics Research
- Particle Accelerators and Free-Electron Lasers
- Particle physics theoretical and experimental studies
- Particle accelerators and beam dynamics
- Advanced NMR Techniques and Applications
- Magnetic confinement fusion research
- Mechanical and Optical Resonators
- Scientific Research and Discoveries
- Probabilistic and Robust Engineering Design
- Advanced MRI Techniques and Applications
- Dark Matter and Cosmic Phenomena
- Cold Atom Physics and Bose-Einstein Condensates
- Quantum, superfluid, helium dynamics
- Ultrasound and Hyperthermia Applications
- Nuclear physics research studies
- Geophysical and Geoelectrical Methods
- Quantum Chromodynamics and Particle Interactions
- Computational Physics and Python Applications
- Wireless Body Area Networks
- Advancements in Photolithography Techniques
- Advanced Condensed Matter Physics
- Augmented Reality Applications
- Electromagnetic Compatibility and Measurements
- Physics of Superconductivity and Magnetism
- Quantum and Classical Electrodynamics
RWTH Aachen University
2015-2024
GSI Helmholtz Centre for Heavy Ion Research
2023
A new method to determine the spin tune is described and tested. In an ideal planar magnetic ring, tune-defined as number of precessions per turn-is given by ν(s)=γG (γ Lorentz factor, G gyromagnetic anomaly). At 970 MeV/c, deuteron spins coherently precess at a frequency ≈120 kHz in Cooler Synchrotron COSY. The deduced from up-down asymmetry deuteron-carbon scattering. time interval 2.6 s, was determined with precision order 10^{-8}, 1×10^{-10} for continuous 100 s accelerator cycle. This...
We observe a deuteron beam polarization lifetime near 1000 s in the horizontal plane of magnetic storage ring (COSY). This long spin coherence time is maintained through combination bunching, electron cooling, sextupole field corrections, and suppression collective effects current limits. record required for search an intrinsic electric dipole moment on at statistical sensitivity level approaching 10^{-29} e cm.
Based on the notion that local dark-matter field of axions or axionlike particles (ALPs) in our Galaxy induces oscillating couplings to spins nucleons and nuclei (via electric dipole moment latter and/or paramagnetic axion-wind effect), we establish feasibility a new method search for ALPs storage rings. previous work allows us maintain in-plane polarization stored deuteron beam few hundred seconds, perform first proof-of-principle experiment at Cooler Synchrotron (COSY) scan momenta near...
This Letter reports the successful use of feedback from a spin polarization measurement to revolution frequency $0.97\text{ }\text{ }\mathrm{GeV}/c$ bunched and polarized deuteron beam in Cooler Synchrotron (COSY) storage ring order control both precession rate ($\ensuremath{\approx}121\text{ }\mathrm{kHz}$) phase horizontal component. Real time synchronization with radio (rf) solenoid made possible rotation out plane, yielding demonstration method manipulate polarization. In particular,...
The stable spin direction of polarized particles in a storage ring was determined first experimentally, through an accurate measurement the tune and its response to longitudinal magnetic fields.
The proposed method exploits charged particles confined as a storage ring beam (proton, deuteron, possibly $^3$He) to search for an intrinsic electric dipole moment (EDM) aligned along the particle spin axis. Statistical sensitivities could approach 10$^{-29}$ e$\cdot$cm. challenge will be reduce systematic errors similar levels. adjusted preserve polarisation, initially parallel velocity, times in excess of 15 minutes. Large radial fields, acting through EDM, rotate polarisation from...
Precision experiments, such as the search for a deuteron electric dipole moment using storage rings like COSY, demand an understanding of spin dynamics with unprecedented accuracy. In enterprise, numerical predictions play crucial role development and later application spin-tracking algorithms. Various measurement concepts involving polarization effects induced by rf Wien filter static solenoids in COSY are discussed. The matrix formalism, applied here, deals solely rotations on closed orbit...
For the measurement of electric dipole moment protons and deuterons, a novel waveguide RF Wien filter has been designed will soon be integrated at COoler SYnchrotron J\"ulich. The device operates harmonic frequencies spin motion. It is based on structure that capable fulfilling condition ($\vec{E} \perp \vec{B}$) \textit{by design}. full-wave calculations demonstrated able to generate high-quality magnetic fields. In reality, mechanical tolerances misalignments decrease simulated field...
This paper reports the first simultaneous measurement of horizontal and vertical components polarization vector in a storage ring under influence radio frequency (rf) solenoid. The experiments were performed at Cooler Synchrotron COSY J\"ulich using polarized, bunched $0.97\,\textrm{GeV/c}$ deuteron beam. Using new spin feedback system, we set initial phase difference between solenoid field precession to predefined value. system was then switched off, allowing change over time, on rotate...
The Jülich Electric Dipole moment Investigation (JEDI) collaboration aims at a direct measurement of the Moment (EDM) protons and deuterons using storage ring. is based on polarization measurement. In order to reach highest accuracy, one has know exact trajectory through magnets, especially quadrupoles, avoid influence magnetic fields vector. this paper, development beam-based alignment technique described that was developed implemented COoler SYnchrotron (COSY) Forschungszentrum Jülich....
We investigated coherent betatron oscillations of a deuteron beam in the storage ring cooler synchrotron and ring, excited by detuned rf Wien filter (WF). The were detected conventional position monitors. With currently available apparatus, we show that oscillation amplitudes down to $1\text{ }\text{ }\ensuremath{\mu}\mathrm{m}$ can be detected. interpretation response stored WF is based on simulations evolution lattice realistic time-dependent 3D field maps WF. Future measurements electric...
Abstract A measurement of vector analyzing powers in elastic deuteron-carbon scattering has been performed at the Cooler Synchrotron COSY Forschungszentrum Jülich, Germany. Seven kinetic beam energies between 170 and 380 MeV have used. vector-polarized from a polarized deuteron source was injected, accelerated to final desired energy stored COSY. thin needle-shaped diamond strip used as carbon target, onto which slowly steered. Elastically scattered deuterons were identified forward...
A calorimetric polarimeter based on inorganic LYSO scintillators is described. It has been designed for use in a storage ring to search electric dipole moments (EDM) of charged particles such as the proton and deuteron. Its development first was Cooler Synchrotron (COSY) at Forschungszentrum Jülich with 0.97 GeV/c polarized deuterons, particle energy suitable an EDM search. The requires high efficiency, large analyzing power, stable operating characteristics. With typical beam momenta about...
An implementation of the Polynomial Chaos Expansion is introduced here as a fast solver equations beam and spin motion inside an RF Wien filter. The device shall be used to search for deuteron electric dipole moment in COSY storage ring. new approach based on stochastic Galerkin method, it shown that this constitutes very powerful alternative commonly Monte-Carlo methods.
This project exploits charged particles confined as a storage ring beam (proton, deuteron, possibly $^3$He) to search for an intrinsic electric dipole moment (EDM, $\vec d$) aligned along the particle spin axis. Statistical sensitivities can approach $10^{-29}$~e$\cdot$cm. The challenge will be reduce systematic errors similar levels. adjusted preserve polarization, initially parallel velocity, times in excess of 15 minutes. Large radial fields, acting through EDM, rotate polarization ($\vec...
The waveguide RF Wien filter is one of the key components JEDI project at COoler SYnchrotron in Jülich. driving circuit constitutes a fundamental part filter. When running spin precession frequency, must ensure that load impedance set to correct complex value so electric and magnetic fields are matched, leading vanishing Lorentz force during operation high power levels up 10 kW. This paper discusses design, simulation, realization performance analysis circuit.
High-frequency driven resonant spin rotators are routinely used as standard instruments in polarization experiments particle and nuclear physics. Maintaining the continuous exact parametric resonance condition of equality rotator precession frequency during operation is one challenges. We present a detailed analytical description effects detuning on precessing vertical in-plane components polarization. An important part formalism presented here consideration experimentally relevant...
This paper presents the conceptualization, design and simulation of a hybrid multi-frequency antenna system for Radio Frequency (RF) hyperthermia Magnetic Resonance Imaging (MRI) applications with ultra-sharp hotspot. Two different bowtie arrays have been designed, simulated integrated. The first array is designed as an RF coil MR imaging. It optimized to generate highly homogeneous transmit B⃗ <sub xmlns:mml="http://www.w3.org/1998/Math/MathML"...
The study of the approach to quantum ground state and possibility detect displacements macroscopic bodies close limit represent pressing challenges in modern physics. In recent experiment JEDI Collaboration at COSY storage ring, coherent oscillations a deuteron beam were detected with an amplitude only one order magnitude above Heisenberg uncertainty principle about 40 nm for one-particle betatron motion. On other hand, much discussed search permanent electric dipole moment proton ultimate...