A. Aksentev
A5006755383- Atomic and Subatomic Physics Research
- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Dark Matter and Cosmic Phenomena
- Magnetic confinement fusion research
- Nuclear Physics and Applications
- Particle physics theoretical and experimental studies
- Superconducting Materials and Applications
- Magnetic properties of thin films
- Geophysical and Geoelectrical Methods
- Advanced Electrical Measurement Techniques
- Advanced Data Storage Technologies
- Nuclear physics research studies
- Quantum, superfluid, helium dynamics
- Mechanical and Optical Resonators
- Cold Atom Physics and Bose-Einstein Condensates
- Crystallography and Radiation Phenomena
- Particle Detector Development and Performance
- Pulsed Power Technology Applications
- Quantum and Classical Electrodynamics
- Computational Physics and Python Applications
- Gyrotron and Vacuum Electronics Research
- Characterization and Applications of Magnetic Nanoparticles
- Neutrino Physics Research
- Geophysics and Sensor Technology
Institute for Nuclear Research
2020-2024
Moscow Engineering Physics Institute
2015-2024
Russian Academy of Sciences
2024
Forschungszentrum Jülich
2017-2019
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 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...
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...
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...
Abstract A new method for searching the electric dipole moment (EDM) of deuteron and other nuclei is presented. When trying to measure EDM in a storage ring environment, magnetic (MDM) spin precession due machine imperfections becomes primary source systematic error. The proposed aims at providing solution imperfection problemas well as circumventing geometric phase based on estimating combined MDM + frequency, which contribution only field imperfections. term canceled final statistic by...
The method is based on four fundamental features. total spin precession frequency in the vertical plane due to electric and magnetic dipole moments an imperfect ring a measured. position of elements unchanged from clockwise counter-clockwise operation. calibration effective Lorentz factor using polarization measurement horizontal carried out alternately each CW CCW And approximate relationship between frequencies different planes set exclude them mixing expected EDM signal at sensitivity...
Abstract This study is motivated by the search for electric dipole moment (EDM) of elementary particles. The most promising idea in that regard “Frozen Spin” concept first proposed BNL. concept, however, requires building a brand-new facility devoted to EDM-search. NICA not such facility, hence need modification compatible with existing optics; one wouldn’t disrupt ring’s capability parallel experiments. Such “Quasi-Frozen idea, realized adding transport channels, bypassing straight...
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...
Currently, the "Jülich Electric Dipole moment Investigations" (JEDI) collaboration, together with present EDM experiments at COSY ring, is developing conceptual design of a ring specifically for search deuteron electric dipole (dEDM). One main problems in study spin precession vertical plane caused by non-ideal positioning accelerator elements through magnetic (MDM). The idea how to separate from MDM based on measuring tune different processes and comparing results. high precision...
Abstract This article has been withdrawn by IOP Publishing following the request authors to augment their affiliation an institution. Upon reviewing matter, found that institution (Moscow Institute of Physics and Technology) is subject sanctions UK government. To ensure compliance with regulations, this from IOPscience.
Radiofrequency-driven resonant spin rotators are routinely used as standard instruments in polarization experiments particle and nuclear physics. Maintaining the continuous exact parametric spin-resonance condition of equality rotator precession frequency during operation constitutes one challenges. We present a detailed analytic description impact detuning resonance on vertical in-plane precessing components polarization. An important part formalism presented here is consideration...
In polarization experiments at storage rings, one of the challenges is to maintain spin-resonance condition a radio-frequency spin rotator with spin-precessions orbiting particles. Time-dependent variations magnetic fields ring elements lead unwanted precession frequency. We report here on solution this problem by shielding (or masking) bunches stored in from high-frequency rotator, so that masked pilot bunch acts as co-magnetometer for other signal bunch, tracking fluctuations time scale...