RuPAC2016 - List of Keywords (storage-ring)

Paper	Title	Other Keywords	Page
MOZMH03	Search for the Charged Particle Electric Dipole Moments in Storage Rings	lattice, dipole, polarization, sextupole	6
	V. Senichev FZJ, Jülich, Germany
	The idea of searching for the electric dipole moment (EDM) of proton and deuteron using polarized beams in a storage ring was originally proposed at Brookhaven National Laboratory (BNL), USA. Currently, the Jülich Electric Dipole moment Investigations (JEDI) collaboration develops the conceptual design of such a ring specifically for the search of the deuteron electrical dipole moment (dEDM). The idea is that the oscillation of the spin due to a possible finite electric dipole moment is separated from the influence of the magnetic dipole moment (MDM), and the spin behavior indicates the existence of dEDM. In connection with this problem, two questions arise: (i) how to create conditions for maximum growth of the total EDM signal of all particles in the beam bunch, and (ii) how to differentiate the EDM signal from the induced MDM signal. For the design of such a ring, we need to address three major challenges: - the ring lattice should meet the conditions of beam stability, and it has to have incorporated straight sections to accommodate the accelerating station, equipment for injection and extraction of the beam, a polarimeter, and sextupoles; - the polarization lifetime of the beam must be around ~1000 seconds; - systematic errors have to be minimized to eliminate the induced fake EDM signal. In my contribution, I will present the current status of the project.
	Slides MOZMH03 [5.491 MB]
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WECAMH04	Recent Experiments With High Energy Electron Cooler in COSY	electron, proton, target, experiment	67
	V.B. Reva, M.I. Bryzgunov, V.V. Parkhomchuk, D.N. Skorobogatov BINP SB RAS, Novosibirsk, Russia V. Kamerdzhiev FZJ, Jülich, Germany I.N. Meshkov JINR, Dubna, Moscow Region, Russia
	The 2 MeV electron cooling system at COSY-Jülich started operation in 2013. The cooling process was observed in the wide energy range of the electron beam from 100 keV to 1.26 MeV. Vertical, horizontal and longitudinal cooling was obtained with bunched and coasting proton beam. This report deals with electron cooling experiments at COSY with proton beam at energy 1.66 and 2.3 GeV. The proton beam was cooled at different regimes: RF on and off, barrier bucket RF, and cluster target on and off.
	Slides WECAMH04 [11.045 MB]
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSA040	S-Band Choke Mode Cavity for Low Energy Storage Ring	cavity, HOM, electron, scattering	300
	L. Ovchinnikova, V.I. Shvedunov SINP MSU, Moscow, Russia A. Ryabov IHEP, Moscow Region, Russia V.I. Shvedunov LEA MSU, Moscow, Russia
	Several variants of a low-energy storage ring for Thomson scattering X-ray source were considered in . The most promising variant "C" of the ring with small dimensions and large dynamic aperture has also large momentum compaction factor, which would lead to too long bunches with RF cavity operating at 714 MHz, so shorter wavelength must be used. In this paper we present results of optimization of S-band double-cells cavity with parasitic mode damping by chokes similar to . Interaction of the bunch circulating in the ring with cavity parasitic modes is simulated. L. Ovchinnikova, V. Shvedunov, A. Mikhailichenko et al.. A comparative study of low energy compact storage rings for a thomson scattering x-ray source. Proc. of IPAC-16, 2016, pp. 3308-3310. ** T. Shintake, The Choke Mode Cavity, Jpn. J. Appl. Phys, Vol. 31,1992, pp. L1567-L1570, No. 1lA
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPSB016	Coupled Bunch Instabilities in the Storage Rings	impedance, wakefield, electron, synchrotron	395
	A.S. Smygacheva, Y.A. Fomin, V. Korchuganov NRC, Moscow, Russia
	Funding: The reported study was funded by RFBR according to the research project No. 16-32-00335 mol_a. Coherent instabilities of the bunched beam are one of the reasons that limit a total beam current in the storage rings. Although there are solutions of this problem, the estimation and reduction of wake-fields influence on the longitudinal beam dynamics remain important things. In the article we return to the subject of coherent instabilities of the unevenly-filled bunches in the storage rings.
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPSB019	Orbital Motion in Multipole Fields via Multiscale Decomposition	controls, multipole, lattice, octupole	404
	A.N. Fedorova, M.G. Zeitlin RAS/IPME, St. Petersburg, Russia
	We present applications of methods of nonlinear local harmonic analy- sis in variational framework for a description of multiscale decomposition in polynomial/rational approximations (up to any order) for nonlinear motions in arbitrary n-pole fields. Our approach is based on the methods allowed to consider dynamical beam/particle localization in phase space and provided exact multiscale representations via nonlinear high-localized eigenmodes for observables with exact control of contributions to motion from each underlying hidden scale.
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOZMH03

Search for the Charged Particle Electric Dipole Moments in Storage Rings

lattice, dipole, polarization, sextupole

6

V. Senichev
FZJ, Jülich, Germany

The idea of searching for the electric dipole moment (EDM) of proton and deuteron using polarized beams in a storage ring was originally proposed at Brookhaven National Laboratory (BNL), USA. Currently, the Jülich Electric Dipole moment Investigations (JEDI) collaboration develops the conceptual design of such a ring specifically for the search of the deuteron electrical dipole moment (dEDM). The idea is that the oscillation of the spin due to a possible finite electric dipole moment is separated from the influence of the magnetic dipole moment (MDM), and the spin behavior indicates the existence of dEDM. In connection with this problem, two questions arise: (i) how to create conditions for maximum growth of the total EDM signal of all particles in the beam bunch, and (ii) how to differentiate the EDM signal from the induced MDM signal. For the design of such a ring, we need to address three major challenges: - the ring lattice should meet the conditions of beam stability, and it has to have incorporated straight sections to accommodate the accelerating station, equipment for injection and extraction of the beam, a polarimeter, and sextupoles; - the polarization lifetime of the beam must be around ~1000 seconds; - systematic errors have to be minimized to eliminate the induced fake EDM signal. In my contribution, I will present the current status of the project.

Slides MOZMH03 [5.491 MB]

Export •

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

WECAMH04

Recent Experiments With High Energy Electron Cooler in COSY

electron, proton, target, experiment

67

V.B. Reva, M.I. Bryzgunov, V.V. Parkhomchuk, D.N. Skorobogatov
BINP SB RAS, Novosibirsk, Russia
V. Kamerdzhiev
FZJ, Jülich, Germany
I.N. Meshkov
JINR, Dubna, Moscow Region, Russia

The 2 MeV electron cooling system at COSY-Jülich started operation in 2013. The cooling process was observed in the wide energy range of the electron beam from 100 keV to 1.26 MeV. Vertical, horizontal and longitudinal cooling was obtained with bunched and coasting proton beam. This report deals with electron cooling experiments at COSY with proton beam at energy 1.66 and 2.3 GeV. The proton beam was cooled at different regimes: RF on and off, barrier bucket RF, and cluster target on and off.

Slides WECAMH04 [11.045 MB]

Export •

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

TUPSA040

S-Band Choke Mode Cavity for Low Energy Storage Ring

cavity, HOM, electron, scattering

300

L. Ovchinnikova, V.I. Shvedunov
SINP MSU, Moscow, Russia
A. Ryabov
IHEP, Moscow Region, Russia
V.I. Shvedunov
LEA MSU, Moscow, Russia

Several variants of a low-energy storage ring for Thomson scattering X-ray source were considered in *. The most promising variant "C" of the ring with small dimensions and large dynamic aperture has also large momentum compaction factor, which would lead to too long bunches with RF cavity operating at 714 MHz, so shorter wavelength must be used. In this paper we present results of optimization of S-band double-cells cavity with parasitic mode damping by chokes similar to **. Interaction of the bunch circulating in the ring with cavity parasitic modes is simulated.
* L. Ovchinnikova, V. Shvedunov, A. Mikhailichenko et al.. A comparative study of low energy compact storage rings for a thomson scattering x-ray source. Proc. of IPAC-16, 2016, pp. 3308-3310.
** T. Shintake, The Choke Mode Cavity, Jpn. J. Appl. Phys, Vol. 31,1992, pp. L1567-L1570, No. 1lA

Export •

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

WEPSB016

Coupled Bunch Instabilities in the Storage Rings

impedance, wakefield, electron, synchrotron

395

A.S. Smygacheva, Y.A. Fomin, V. Korchuganov
NRC, Moscow, Russia

Funding: The reported study was funded by RFBR according to the research project No. 16-32-00335 mol_a.
Coherent instabilities of the bunched beam are one of the reasons that limit a total beam current in the storage rings. Although there are solutions of this problem, the estimation and reduction of wake-fields influence on the longitudinal beam dynamics remain important things. In the article we return to the subject of coherent instabilities of the unevenly-filled bunches in the storage rings.

Export •

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

WEPSB019

Orbital Motion in Multipole Fields via Multiscale Decomposition

controls, multipole, lattice, octupole

404

A.N. Fedorova, M.G. Zeitlin
RAS/IPME, St. Petersburg, Russia

We present applications of methods of nonlinear local harmonic analy- sis in variational framework for a description of multiscale decomposition in polynomial/rational approximations (up to any order) for nonlinear motions in arbitrary n-pole fields. Our approach is based on the methods allowed to consider dynamical beam/particle localization in phase space and provided exact multiscale representations via nonlinear high-localized eigenmodes for observables with exact control of contributions to motion from each underlying hidden scale.

Export •

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