A. Dudarev
A5001248848- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- High-Energy Particle Collisions Research
- Superconducting Materials and Applications
- Dark Matter and Cosmic Phenomena
- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Quantum Chromodynamics and Particle Interactions
- Computational Physics and Python Applications
- Physics of Superconductivity and Magnetism
- Atomic and Subatomic Physics Research
- Atomic and Molecular Physics
- Astrophysics and Cosmic Phenomena
- Neutrino Physics Research
- Muon and positron interactions and applications
- Spacecraft and Cryogenic Technologies
- Superconductivity in MgB2 and Alloys
- Distributed and Parallel Computing Systems
- Quantum, superfluid, helium dynamics
- Cold Atom Physics and Bose-Einstein Condensates
- Cosmology and Gravitation Theories
- Radiation Detection and Scintillator Technologies
- Magnetic confinement fusion research
- Medical Imaging Techniques and Applications
- advanced mathematical theories
European Organization for Nuclear Research
2016-2025
Institute for Nuclear Research
2011-2017
University of Twente
2012-2016
University of Colorado Boulder
2016
Dubna State University
2003-2016
Advanced Conductor Technologies (United States)
2016
Politecnico di Milano
2011-2014
University of Bergen
2012
Linde (United States)
2012
Fermi National Accelerator Laboratory
2012
The International Axion Observatory (IAXO) will be a forth generation axion helioscope. As its primary physics goal, IAXO look for axions or axion-like particles (ALPs) originating in the Sun via Primakoff conversion of solar plasma photons. In terms signal-to-noise ratio, about 4–5 orders magnitude more sensitive than CAST, currently most powerful helioscope, reaching sensitivity to axion-photon couplings down few × 10−12 GeV−1 and thus probing large fraction unexplored ALP parameter space....
With the first tokamak designed for full nuclear operation now well into final assembly (ITER), and a major new research starting commissioning (JT60SA), fusion is becoming mainstream potential energy source future. A critical part of viability magnetic confinement superconductor technology. The experience gained lessons learned in application this technology to ITER JT60SA, together with improved superconducting materials, opening multiple routes commercial reactors. objective roadmap is,...
We study the feasibility of a new generation axion helioscope, most ambitious and promising detector solar axions to date. show that large improvements in magnetic field volume, x-ray focusing optics backgrounds are possible beyond those achieved CERN Axion Solar Telescope (CAST). For hadronic models, sensitivity axion-photon coupling gaγ ≳ few × 10−12 GeV−1 is conceivable, 1–1.5 orders magnitude CAST sensitivity. If also couple electrons, Sun produces larger flux for same value Peccei-Quinn...
We review the physics potential of a next generation search for solar axions: International Axion Observatory (IAXO) . Endowed with sensitivity to discover axion-like particles (ALPs) coupling photons as small gaγ∼ 10−12 GeV−1, or electrons gae∼10−13, IAXO has find QCD axion in 1 meV∼1 eV mass range where it solves strong CP problem, can account cold dark matter Universe and be responsible anomalous cooling observed number stellar systems. At same time, will have enough detect lower axions...
A bstract This article describes BabyIAXO, an intermediate experimental stage of the International Axion Observatory (IAXO), proposed to be sited at DESY. IAXO is a large-scale axion helioscope that will look for axions and axion-like particles (ALPs), produced in Sun, with unprecedented sensitivity. BabyIAXO conceived test all subsystems (magnet, optics detectors) relevant scale final system thus serve as prototype IAXO, but same time fully-fledged physics reach itself, potential discovery....
Various superconducting detector solenoids for particle physics have been developed in the world. The key technology is aluminum-stabilized conductor almost all magnets experiments. With progress of conductor, coil fabrication has progressed as well, such inner winding technique, indirect cooling, transparent vacuum vessel, quench protection scheme using pure aluminum strips and so on. design study future big projects Japan Europe, that is, ILC, FCC CLIC, based on technologies established...
The AEGIS experiment, currently being set up at the Antiproton Decelerator CERN, has objective of studying free fall antimatter in Earth's gravitational field by means a pulsed cold atomic beam antihydrogen atoms. Both duration and vertical displacement horizontally emitted atoms will be measured, allowing first test WEP with antimatter.
Abstract The precise measurement of forces is one way to obtain deep insight into the fundamental interactions present in nature. In context neutral antimatter, gravitational interaction high interest, potentially revealing new that violate weak equivalence principle. Here we report on a successful extension tool from atom optics—the moiré deflectometer—for acceleration slow antiprotons. setup consists two identical transmission gratings and spatially resolving emulsion detector for...
The European Organization for Nuclear Research (CERN) is developing high-current ReBCO-CORC strand-based cables use in future large-scale detector magnets.A six-aroundone, forced flow gas-cooled cable-in-conduit conductor (CICC) envisioned application magnets operating the 20-40 K temperature range.A CICC, rated 45 kA at 4.2 and 10 T, designed production.The CICC comprises a cable of six CORC strands helically wound around tube.The has an expected current density 105 A/mm 2 T/4.2 K, which...
We demonstrate the laser excitation of $n=3$ state positronium (Ps) in vacuum. A combination a specially designed pulsed slow positron beam and high-efficiency converter target was used to produce Ps. Its annihilation recorded by single-shot lifetime spectroscopy. Pulsed level at wavelength $\ensuremath{\lambda}\ensuremath{\approx}205$ nm monitored via Ps photoionization induced second intense pulse $\ensuremath{\lambda}=1064$ nm. About 15% overall emitted into vacuum excited photoionized....
The international particle physics community considers a Muon Collider (MC) as possible option for the successor of Large Hadron (LHC) at CERN. An collaboration has recently been set up to produce conceptual design study Collider. One main challenges is need an ultra-high magnetic field solenoid final cooling muons. This magnet must have bore aperture about 5 cm and 1% homogeneity over 0.5 m length. CERN exploring possibility developing such by only using stack Rare-earth Barium Copper Oxide...
The goal of the DIRAC experiment at CERN (PS212) is to measure $\pi^+\pi^-$ atom lifetime with 10% precision. Such a measurement would yield precision 5% on value $S$-wave $\pi\pi$ scattering lengths combination $|a_0-a_2|$. Based part collected data we present first result lifetime, $\tau=[2.91 ^{+0.49}_{-0.62}]\times 10^{-15}$ s, and discuss major systematic errors. This corresponds $|a_0-a_2|=0.264 ^{+0.033}_{-0.020} m_{\pi}^{-1}$.
We describe the magnet challenges for a Muon Collider, an exciting option considered future of particle physics at energy frontier. Starting from comprehensive work performed by US Accelerator Program, we have reviewed performance specifications dictated beam and operating conditions to satisfy accelerator needs. Among many magnets that make up muon collider, identified four systems represent well envelope challenges: target capture solenoid, final cooling dipoles collider dipoles. These...
We describe a system designed to re-bunch positron pulses delivered by an accumulator supplied source and Surko-trap. Positron from the are magnetically guided in 0.085 T field injected into region free of magnetic fields through μ-metal terminator. Here positrons temporally compressed, electrostatically accelerated towards porous silicon target for production emission positronium vacuum. Positrons focused spot less than 4 mm FWTM bunches ∼8 ns FWHM. Emission vacuum is shown single shot...
In recent years, three unique ReBCO-CORC CICC samples with six-around-one cable layout were developed as technology demonstrators at CERN in collaboration Advanced Conductor Technologies. The tests of these conductors low temperature external magnetic field yielded very promising results, but also showed several issues requiring improvement. A new 2.8 m long CORC has been prepared to replace a degraded sample. voids between strands the sample are filled solder alloy provide increased...
The main goal of the AEgIS experiment at CERN is to test weak equivalence principle for antimatter. will measure free-fall an antihydrogen beam traversing a moir\'e deflectometer. determine gravitational acceleration g with initial relative accuracy 1% by using emulsion detector combined silicon micro-strip time flight. Nuclear emulsions can annihilation vertex atoms precision about 1 - 2 microns r.m.s. We present here results detectors operated in vacuum low energy antiprotons from...
The International AXion Observatory (IAXO) will incorporate a new generation detector for axions, hypothetical particle, which was postulated to solve one of the puzzles arising in standard model particle physics, namely strong CP problem. IAXO experiment is aiming at achieving sensitivity coupling between axions and photons order magnitude beyond limits current state-of-the-art detector, represented by CERN Axion Solar Telescope (CAST). relies on high-magnetic field distributed over very...
The International Axion Observatory (IAXO) is a next generation axion helioscope aiming at sensitivity to the axion-photon coupling of few 10^{-12} GeV^{-1}, i.e. 1-1.5 orders magnitude beyond sensitivities achieved by currently most sensitive helioscope, CERN Solar Telescope (CAST). Crucial factors in improving for IAXO are increase magnetic field volume together with extensive use x-ray focusing optics and low background detectors, innovations already successfully tested CAST....