Персона: Аксентьев, Александр Евгеньевич
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Институт лазерных и плазменных технологий
Стратегическая цель Института ЛаПлаз – стать ведущей научной школой и ядром развития инноваций по лазерным, плазменным, радиационным и ускорительным технологиям, с уникальными образовательными программами, востребованными на российском и мировом рынке образовательных услуг.
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- ПубликацияТолько метаданныеMODELING OF THE SPIN-NAVIGATOR METHOD FOR MANIPULATING THE BEAM POLARIZATION IN A SPIN-TRANSPARENT STORAGE RING(2021) Melnikov, A. A.; Senichev, Y. V.; Ladygin, V. P.; Aksentev, A. E.; Аксентьев, Александр Евгеньевич© 27th Russian Particle Accelerator Conference, RuPAC 2021. All rights reserved.A method for manipulating the orientation of the beam polarization axis based on using the so-called “spin-navigator” technique in a storage ring operating in the spin-transparent regime has been modelled. The beam particles' spin- and orbital dynamics have been numerically investigated with the purpose of determining the method's feasibility; the latter's effect on spin-decoherence has been studied also.
- ПубликацияТолько метаданныеInvestigation of Proton Spin Decoherence Mechanisms at COSY(2022) Melnikov, A. A.; Aksentev, A. E.; Senichev, Y. V.; Аксентьев, Александр Евгеньевич
- ПубликацияТолько метаданныеSpinor Description of Frozen and Quasi-Frozen Spin Structures for the EDM Measurement in a Frequency Domain(2024) Melnikov, A. A.; Senichev, Yu. V.; Aksentyev, A. E.; Kolokolchikov, S. D.; Аксентьев, Александр Евгеньевич
- ПубликацияОткрытый доступSpin-Flipping When Approaching the Resonant Energy in the Perturbed NICA Collider Facility with Bypasses(2024) Aksentev, A. E.; Aksentev,A.E.; Melnikov, A. A.; Senichev, Yu. V.; Аксентьев, Александр Евгеньевич
- ПубликацияОткрытый доступThe Nature of Spin Decoherence of a Polarized Beam of Light Nuclei in a Storage Ring for EDM Search(2023) Melnikov, A. A.; Senichev, Yu. V.; Aksentyev, A. E.; Kolokolchikov, S. D.; Аксентьев, Александр Евгеньевич
- ПубликацияОткрытый доступWITHDRAWN: Investigation of spin-decoherence in the NICA storage ring for the future EDM-measurement experiment(2023) Aksentev, A. E.; Melnikov, A. A.; Senichev, Y. V.; Ladygin, V. P.; Аксентьев, Александр ЕвгеньевичAbstract This article has been withdrawn by IOP Publishing following the request by the authors to augment their affiliation by an institution. Upon reviewing the matter, IOP Publishing found that the institution (Moscow Institute of Physics and Technology) is subject to sanctions by the UK government. To ensure compliance with sanctions regulations, this article has been withdrawn from IOPscience.
- ПубликацияОткрытый доступA feasibility study into the quasi-frozen spin regime of operation of the NICA storage ring(2024) Aksentev, A. E.; Melnikov, A. A.; Senichev, Y.V.; Kolokolchikov, S. D.; Аксентьев, Александр ЕвгеньевичAbstract This study is motivated by the search for the electric dipole moment (EDM) of elementary particles. The most promising idea in that regard is the ў??Frozen Spinў?? concept first proposed by the BNL. This concept, however, requires the building of a brand-new facility devoted to the EDM-search. NICA is not such a facility, hence the need for a modification compatible with the existing optics; one that wouldnў??t disrupt the ringў??s capability for parallel experiments. Such a modification is the ў??Quasi-Frozen Spinў?? idea, realized by adding transport channels, bypassing the ringў??s straight sections. Wien-filters are placed in these channels in order to compensate spin-rotations caused by the ringў??s arc dipoles, thus making its net spin-transfer matrix unitary. Even though, during its movement along the beam line, the beamў??s polarization vector deviates from alignment with the momentum vector, this motion is regular and fits within one beam revolution, allowing for the buildup of the EDM-signal. The present study shows that the ў??Quasi-Frozen Spinў??-specific optics is consistent with the existing NICA lattice and that the modified structure is capable of maintaining a requisite spin-coherence time.