RuPAC2021 - List of Keywords (site)

Paper	Title	Other Keywords	Page
TUB03	Methods and Systematic Errors for Searching for the Electric Dipole Moment of Charged Particle Using a Storage Ring	dipole, storage-ring, proton, experiment	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)

TUPSB17	Investigations of Charge Particle Dynamics in Space Charge Fields	ECR, space-charge, gun, experiment	265
	A.S. Chikhachev Allrussian Electrotechnical Institute, Moskow, Russia
	The work examines the transient dynamics of single-component systems. The problem on dynamics of flat layer and spherical symmetric configuration is considered. A classical collision-free system is considered, described using the "Meshchersky integral" and the "conjugate" integral of motion. States characterized by constant charge in non-stationary coordinates are obtained
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB17
About •	Received ※ 09 September 2021 — Revised ※ 20 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 23 September 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPSC16	Numerical Research of Design Solutions for the Bending Magnets of the Electron Beam Facility GESA-1M	electron, target, simulation, space-charge	376
	N.I. Kazachenko, E.I. Gapionok, V.P. Kukhtin, I.Yu. Rodin, K.I. Tkachenko NIIEFA, St. Petersburg, Russia D.A. Ovsyannikov, S.E. Sytchevsky Saint Petersburg State University, Saint Petersburg, Russia
	Comparative simulations of magnet configurations have been performed searching for the optimum design of bending magnets for the intense pulsed electron beam facility GESA-1M. GESA-1M is used for improvement of material surface properties and is capable to generate a 120 kV, 10 A/cm², 50 mks electron beam with the diameter of 10 cm. One of specific concerns is to prevent the beam path from contamination withμparticles of treated materials. To overcome this problem a system of bending magnets is used. The beam trajectory through electric and magnetic fields was simulated for three candidate configurations of the bending magnets. A comparison was focused on the expected power density and divergence angle at the target. The most efficient concept was found to be two pairs of coils arranged orthogonally to each other. This configuration produces highly uniform distribution of the current density at the target, the divergence angle being as low as several degrees. An important advantage is that the initial beam power can be intensified by a 20% at the target.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC16
About •	Received ※ 28 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 19 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

TUB03

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

dipole, storage-ring, proton, experiment

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)

TUPSB17

Investigations of Charge Particle Dynamics in Space Charge Fields

ECR, space-charge, gun, experiment

265

A.S. Chikhachev
Allrussian Electrotechnical Institute, Moskow, Russia

The work examines the transient dynamics of single-component systems. The problem on dynamics of flat layer and spherical symmetric configuration is considered. A classical collision-free system is considered, described using the "Meshchersky integral" and the "conjugate" integral of motion. States characterized by constant charge in non-stationary coordinates are obtained

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB17

About •

Received ※ 09 September 2021 — Revised ※ 20 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 23 September 2021

Cite •

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

WEPSC16

Numerical Research of Design Solutions for the Bending Magnets of the Electron Beam Facility GESA-1M

electron, target, simulation, space-charge

376

N.I. Kazachenko, E.I. Gapionok, V.P. Kukhtin, I.Yu. Rodin, K.I. Tkachenko
NIIEFA, St. Petersburg, Russia
D.A. Ovsyannikov, S.E. Sytchevsky
Saint Petersburg State University, Saint Petersburg, Russia

Comparative simulations of magnet configurations have been performed searching for the optimum design of bending magnets for the intense pulsed electron beam facility GESA-1M. GESA-1M is used for improvement of material surface properties and is capable to generate a 120 kV, 10 A/cm², 50 mks electron beam with the diameter of 10 cm. One of specific concerns is to prevent the beam path from contamination withμparticles of treated materials. To overcome this problem a system of bending magnets is used. The beam trajectory through electric and magnetic fields was simulated for three candidate configurations of the bending magnets. A comparison was focused on the expected power density and divergence angle at the target. The most efficient concept was found to be two pairs of coils arranged orthogonally to each other. This configuration produces highly uniform distribution of the current density at the target, the divergence angle being as low as several degrees. An important advantage is that the initial beam power can be intensified by a 20% at the target.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC16

About •

Received ※ 28 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 19 October 2021

Cite •

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