A5065231579- Astrophysics and Cosmic Phenomena
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Gamma-ray bursts and supernovae
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Radiation Therapy and Dosimetry
- Nuclear Physics and Applications
- Radio Astronomy Observations and Technology
- Atomic and Subatomic Physics Research
- Arctic and Antarctic ice dynamics
- Magnetic confinement fusion research
- Muon and positron interactions and applications
- Solar and Space Plasma Dynamics
- Scientific Research and Discoveries
- Cryospheric studies and observations
- Geophysical and Geoelectrical Methods
- Noncommutative and Quantum Gravity Theories
- Boron Compounds in Chemistry
- Gyrotron and Vacuum Electronics Research
- Medical Imaging Techniques and Applications
- Computational Physics and Python Applications
RWTH Aachen University
2012-2024
Jagiellonian University
2018
Institute of Physics
2018
University of Silesia in Katowice
2018
Czech Academy of Sciences, Institute of Physics
2018
Westfälische Hochschule
2015
Clark Atlanta University
2012
University of Alaska Anchorage
2011-2012
Providence College
2011-2012
Istituto Nazionale di Fisica Nucleare, Sezione di Bari
2012
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 paper presents the successful application of a phase-lock feedback system to maintain resonance condition radio frequency (rf) spin rotator (specifically, an rf Wien filter) with respect 120 kHz precession in Cooler Synchrotron (COSY) storage ring. Real-time monitoring and filter signal allows relative phase between two be stabilized at arbitrary setpoint. The compensates for deviations by adjusting and/or as needed. With this method, variation demand standard deviation...
The speed of sound in a large volume bubble-free ice was measured with high accuracy using linear array six piezoceramic lead zirconium titanate (PZT) receivers. This deployed an ∼3 m3 water tank, which cooled down to −20 °C. freezing process performed inside cooling container. Bubble-free obtained freeze control unit, filters and degases the during process. A dedicated geometry used position PZT receivers emitter such that systematic errors were minimized. With this setup longitudinal...
An experiment (E166) at the Stanford Linear Accelerator Center has demonstrated a scheme in which multi-GeV electron beam passed through helical undulator to generate multi-MeV, circularly polarized photons were then converted thin target produce positrons (and electrons) with longitudinal polarization above 80% 6 MeV. The results are agreement Geant4 simulations that include dominant polarization-dependent interactions of electrons, positrons, and matter.Received 8 March...
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...
A search for muon neutrinos from dark matter annihilations in the Galactic Center region has been performed with 40-string configuration of IceCube Neutrino Observatory using data collected 367 days live-time starting April 2008. The observed fluxes were consistent atmospheric background expectations. Upper limits on self-annihilation cross-section are obtained particle masses ranging 100 GeV to 10 TeV. In case decaying matter, lower lifetime have determined between 200 and 20
Time-Integrated Searches for Point-like Sources of Neutrinos with the 40-String IceCube Detector Abbasi, R, etal 9 Dec 2010 This work was supported by Director, Office Science, Basic Energy Sciences, U.S. Department under Contract No. DE-AC02-05CH11231. DISCLAIMER document prepared as an account sponsored United States Government. While this is believed to contain correct information, neither Government nor any agency thereof, The Regents University California, their employees, makes...
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....
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...
Silicon drift detectors (SDD) with on-chip electronics have found many applications in different fields. A detector system has recently been designed and built to study the electrons from Compton scatter events such a detector. The reconstruction of is crucial issue for imaging. equipment consists monolithic array 19 channel SDDs an Anger camera. Photons emitted finely collimated source undergo scattering within SDD where recoil electron absorbed. scattered photon subsequently observed by...
IceCube Collaboration Contributions to the 2009 International Cosmic Ray Conference
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...
A promising approach to measure the expected low flux of cosmic neutrinos at highest energies (E > 1 EeV) is acoustic detection. There are different in-situ test installations worldwide in water and ice properties medium with regard feasibility neutrino The parameters interest include attenuation length, sound speed profile, background noise level transient backgrounds. South Pole Acoustic Test Setup (SPATS) has been deployed upper 500 m drill holes for IceCube observatory geographic...