RuPAC2021 - List of Authors (Aksentyev, A.E.)

Paper	Title	Page
TUB07	The Conceptual Design of the 7.5 MeV/u Light Ion Injector	51
	S.M. Polozov, A.E. Aksentyev, M.M. Bulgacheva, O.V. Deryabochkin, M.S. Dmitriyev, V.V. Dmitriyeva, M.V. Dyakonov, V.S. Dyubkov, A.V. Gerasimenko, A.A. Gorchakov, M. Gusarova, M.A. Guzov, E.N. Indiushnii, A.M. Korshunov, K.I. Kozlovskiy, A.S. Krasnov, M.V. Lalayan, Y. Lozeev, T.A. Lozeeva, A.I. Makarov, S.V. Matsievskiy, A.P. Melekhov, O.V. Murygin, R.E. Nemchenko, G.G. Novikov, A.E. Novozhilov, A.S. Panishev, V.N. Pashentsev, A.G. Ponomarenko, A.V. Prokopenko, V.I. Rashchikov, A.V. Samoshin, A.A. Savchik, V.L. Shatokhin, A.E. Shikanov, K.D. Smirnov, G.A. Tsarev, S.A. Tumanov, I.A. Yurin, M.I. Zhigailova MEPhI, Moscow, Russia M.L. Smetanin, A.V. Telnov VNIIEF, Sarov, Russia N.V. Zavyalov RFNC-VNIIEF, Sarov, Nizhniy Novgorod region, Russia
	The new linac for light ion beam injection is under development at MEPhI. Such linac was proposed for acceleration of 7.5 MeV/u ion beam with A/Z=1-3 and current up to 5 mA for proton and 0.4 pmA for light ions. The linac general layout will include two types of ion sources: ECR ion source for proton anf He ions and laser ion source for ions form Li to O. Following the LEBT ions will be bunched and accelerated to the final energy using RFQ section and 14 IH cavities. These IH-cavities will be identical (divided into two groups) and independently phased. All cavities will operate on 81 MHz. Results of the beam dynamics simulations and the cavities design will presented in the report.
	Slides TUB07 [5.210 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUB07
About •	Received ※ 16 September 2021 — Revised ※ 25 September 2021 — Accepted ※ 27 September 2021 — Issued ※ 14 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSB10	Modeling of the Spin-Navigator Method for Manipulating the Beam Polarization in a Spin-Transparent Storage Ring	251
	A.E. Aksentyev, A.A. Melnikov, V. Senichev RAS/INR, Moscow, Russia A.E. Aksentyev MEPhI, Moscow, Russia V. Ladygin JINR, Dubna, Moscow Region, Russia
	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.
	Poster TUPSB10 [1.848 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB10
About •	Received ※ 24 September 2021 — Accepted ※ 29 September 2021 — Issued ※ 06 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSB11	Numerical Investigation of the Robustness of Spin-Navigator Polarization Control Method in a Spin-Transparent Storage Ring	254
	A.A. Melnikov, A.E. Aksentyev, V. Senichev RAS/INR, Moscow, Russia A.E. Aksentyev MEPhI, Moscow, Russia V. Ladygin JINR, Dubna, Moscow Region, Russia
	The robustness of spin-navigator based method for manipulating the beam polarization axis has been investigated with respect to bend magnet installation errors. Toward that end, variation of the invariant spin axis components along the beamline of an imperfect storage ring operating in the spin-transparent mode has been estimated. The beam polarization vector behavior in the given lattice has been investigated. Conclusions are made regarding the feasibility of using spin navigator solenoids for defining the beam polarization axis in the detector region.
	Poster TUPSB11 [0.536 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB11
About •	Received ※ 12 September 2021 — Revised ※ 13 September 2021 — Accepted ※ 20 September 2021 — Issued ※ 11 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUB03	Methods and Systematic Errors for Searching for the Electric Dipole Moment of Charged Particle Using a Storage Ring	44
	V. Senichev, A.E. Aksentyev, A.A. Melnikov RAS/INR, Moscow, Russia
	One of possible argument for CP-invariance violation is the existence of non-vanishing electric dipole moment (EDM) of elementary particles. To search for the EDM the BNL proposed to construct a special ring implementing the frozen spin mode in order to detect the EDM signal. Since systematic errors determine the sensitivity of a method, this article analyzes some major methods proposed for searching for the EDM from the point of view of this problem. The frequency domain method (FDM) proposed by the authors does not require a special accelerator for deuterons and requires spin precession frequency measurements only. The method has four features: the total spin precession frequency due both to the electric and the magnetic dipole moments in an imperfect ring in the longitudinal-vertical plane is measured at an absolute statistic error value of ~10^-7 rad/sec in one ring filling; the ring elements position remain unchanged when changing the beam circulation direction from clockwise (CW) to counterclockwise (CCW); calibration of the effective Lorentz factor by means of spin precession frequency measurements in the horizontal plane is carried out alternately in each CW and CCW procedure; the approximate relationship between the spin precession frequency components is set to exclude them from mixing to the expected EDM signal at a statistical sensitivity level approaching 10^-29 e cm. The FDM solves the problem of systematic errors, and can be applied in the NICA facility.
	Slides TUB03 [6.184 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUB03
About •	Received ※ 10 September 2021 — Revised ※ 18 September 2021 — Accepted ※ 27 September 2021 — Issued ※ 17 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

The Conceptual Design of the 7.5 MeV/u Light Ion Injector

51

S.M. Polozov, A.E. Aksentyev, M.M. Bulgacheva, O.V. Deryabochkin, M.S. Dmitriyev, V.V. Dmitriyeva, M.V. Dyakonov, V.S. Dyubkov, A.V. Gerasimenko, A.A. Gorchakov, M. Gusarova, M.A. Guzov, E.N. Indiushnii, A.M. Korshunov, K.I. Kozlovskiy, A.S. Krasnov, M.V. Lalayan, Y. Lozeev, T.A. Lozeeva, A.I. Makarov, S.V. Matsievskiy, A.P. Melekhov, O.V. Murygin, R.E. Nemchenko, G.G. Novikov, A.E. Novozhilov, A.S. Panishev, V.N. Pashentsev, A.G. Ponomarenko, A.V. Prokopenko, V.I. Rashchikov, A.V. Samoshin, A.A. Savchik, V.L. Shatokhin, A.E. Shikanov, K.D. Smirnov, G.A. Tsarev, S.A. Tumanov, I.A. Yurin, M.I. Zhigailova
MEPhI, Moscow, Russia
M.L. Smetanin, A.V. Telnov
VNIIEF, Sarov, Russia
N.V. Zavyalov
RFNC-VNIIEF, Sarov, Nizhniy Novgorod region, Russia

The new linac for light ion beam injection is under development at MEPhI. Such linac was proposed for acceleration of 7.5 MeV/u ion beam with A/Z=1-3 and current up to 5 mA for proton and 0.4 pmA for light ions. The linac general layout will include two types of ion sources: ECR ion source for proton anf He ions and laser ion source for ions form Li to O. Following the LEBT ions will be bunched and accelerated to the final energy using RFQ section and 14 IH cavities. These IH-cavities will be identical (divided into two groups) and independently phased. All cavities will operate on 81 MHz. Results of the beam dynamics simulations and the cavities design will presented in the report.

Slides TUB07 [5.210 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUB07

About •

Received ※ 16 September 2021 — Revised ※ 25 September 2021 — Accepted ※ 27 September 2021 — Issued ※ 14 October 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSB10

Modeling of the Spin-Navigator Method for Manipulating the Beam Polarization in a Spin-Transparent Storage Ring

251

A.E. Aksentyev, A.A. Melnikov, V. Senichev
RAS/INR, Moscow, Russia
A.E. Aksentyev
MEPhI, Moscow, Russia
V. Ladygin
JINR, Dubna, Moscow Region, Russia

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.

Poster TUPSB10 [1.848 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB10

About •

Received ※ 24 September 2021 — Accepted ※ 29 September 2021 — Issued ※ 06 October 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSB11

Numerical Investigation of the Robustness of Spin-Navigator Polarization Control Method in a Spin-Transparent Storage Ring

254

A.A. Melnikov, A.E. Aksentyev, V. Senichev
RAS/INR, Moscow, Russia
A.E. Aksentyev
MEPhI, Moscow, Russia
V. Ladygin
JINR, Dubna, Moscow Region, Russia

The robustness of spin-navigator based method for manipulating the beam polarization axis has been investigated with respect to bend magnet installation errors. Toward that end, variation of the invariant spin axis components along the beamline of an imperfect storage ring operating in the spin-transparent mode has been estimated. The beam polarization vector behavior in the given lattice has been investigated. Conclusions are made regarding the feasibility of using spin navigator solenoids for defining the beam polarization axis in the detector region.

Poster TUPSB11 [0.536 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB11

About •

Received ※ 12 September 2021 — Revised ※ 13 September 2021 — Accepted ※ 20 September 2021 — Issued ※ 11 October 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUB03

Methods and Systematic Errors for Searching for the Electric Dipole Moment of Charged Particle Using a Storage Ring

44

V. Senichev, A.E. Aksentyev, A.A. Melnikov
RAS/INR, Moscow, Russia

One of possible argument for CP-invariance violation is the existence of non-vanishing electric dipole moment (EDM) of elementary particles. To search for the EDM the BNL proposed to construct a special ring implementing the frozen spin mode in order to detect the EDM signal. Since systematic errors determine the sensitivity of a method, this article analyzes some major methods proposed for searching for the EDM from the point of view of this problem. The frequency domain method (FDM) proposed by the authors does not require a special accelerator for deuterons and requires spin precession frequency measurements only. The method has four features: the total spin precession frequency due both to the electric and the magnetic dipole moments in an imperfect ring in the longitudinal-vertical plane is measured at an absolute statistic error value of ~10^-7 rad/sec in one ring filling; the ring elements position remain unchanged when changing the beam circulation direction from clockwise (CW) to counterclockwise (CCW); calibration of the effective Lorentz factor by means of spin precession frequency measurements in the horizontal plane is carried out alternately in each CW and CCW procedure; the approximate relationship between the spin precession frequency components is set to exclude them from mixing to the expected EDM signal at a statistical sensitivity level approaching 10^-29 e cm. The FDM solves the problem of systematic errors, and can be applied in the NICA facility.

Slides TUB03 [6.184 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUB03

About •

Received ※ 10 September 2021 — Revised ※ 18 September 2021 — Accepted ※ 27 September 2021 — Issued ※ 17 October 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)