RuPAC2016 - List of Keywords (emittance)

Paper	Title	Other Keywords	Page
FRCAMH06	Simulation of Two-Plane Painting Multiturn Injection into BRing with Space Charge Effect	injection, space-charge, simulation, septum	163
	A.V. Smirnov JINR, Dubna, Moscow Region, Russia W.P. Chai, G.F. Qu, L.P. Yao IMP/CAS, Lanzhou, People's Republic of China
	The new project HIAF is under design now in IMP (Lanzhou, China). One of the aim of the project is to accumulate about 1.4·10¹¹ ions U³⁴⁺ in the booster ring (BRing) at the injection energy 17 MeV/u. Two-plan injection procedure in horizontal and vertical spaces was proposed to fill out full acceptance of BRing. The optimization of injection parameters is presented in this report. The space charge effect was estimated with the molecular dynamics technique which was effectively used for the crystalline beam simulation.
	Slides FRCAMH06 [4.324 MB]
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THCASH01	Effective RF Deflecting Structures for Bunch Rotation and Deflection	operation, linac, RF-structure, luminosity	201
	V.V. Paramonov RAS/INR, Moscow, Russia
	Deflecting RF Structures find now applications for the bunch rotation with the purposes of diagnostic for the longitudinal distribution, emittance exchange and for the luminosity improvements in colliders. Report describes results of R&D program for development of deflectors with minimized level of aberrations in the distribution of deflecting field. Such structures, applied for bunch rotation along transverse axis, provide much smaller emittence growth, as compared to another options. In comparison with classical and widely used deflectors, based on disk loaded waveguide, developed structures have, depending on modification, in 2-6 times higher RF efficiency. Structures can operate both in Traveling Wave (TW) and in Standing Wave (SW) modes. To create long RF cavities for SW operation, compensated (bi-periodical) options are developed, combining field stability and high RF efficiency. The problem of stabilization for the plane of deflection is removed due to essentially 3D geometry. The main solutions for such structures development are described and achieved parameters are reported.
	Slides THCASH01 [6.084 MB]
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TUPSA016	Beam Simulation and Measurements at Beam Line to RADEX Experimental Area of INR Linac	linac, quadrupole, proton, simulation	250
	V.N. Aseev, S. Bragin, S.A. Gavrilov, P.I. Reinhardt-Nickoulin, O. Volodkevich RAS/INR, Moscow, Russia
	In 2015 the experimental complex beam lines of INR linac were upgraded. There is a need to study beam dynamics in these lines. The results of beam simulation at beam line to RADEX experimental area and comparison with beam measurements are presented.
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TUPSA061	Comparative Research of Low Energy Beam Transport Systems for H-minus Ion Beam	ion, solenoid, simulation, quadrupole	333
	B.A. Frolov IHEP, Moscow Region, Russia V.S. Klenov RAS/INR, Moscow, Russia
	The source of H-minus ions for the injection in LU-30 accelerator is being constructed at IHEP. A three-dimensional (3D)simulation code IBSimu has been utilized for modeling of the transport and matching system of beam from the H-minus ion source into RFQ. A magnetic low energy beam transport (LEBT) line consisting of two solenoids and LEBT consisting of six magnetic quadrupole lenses were analyzed. The particle data from the 50 mA 100 keV ion beam extraction system simulations were taken as the starting data for the LEBT simulations. The main objective of the project was to achieve the required Twiss parameters and to minimize emittance growth at RFQ entrance. The LEBT consisting of two solenoids is more convenient in adjustment and as simulation results have shown this system offers more acceptable beam characteristics at the match point in comparison with LEBT composed of quadrupole lenses.
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WEPSB009	The Behavior of Powerful Relativistic Electron Beam With Elliptical Cross-Section in Longitudinal Magnetic Field	electron, quadrupole, cathode	373
	A.S. Chikhachev Allrussian Electrotechnical Institute, Moskow, Russia H.Y. Barminova MEPhI, Moscow, Russia
	The behavior of relativistic intense electron beam with elliptical cross-section moving in a longitudinal magnetic field is investigated with the help of self-consistent model. The solutions for the beam envelopes are obtained in the case of the beam current differed from Alfven limit and the beam charge neutralized. The conditions of stationary beam propagation are determined, however it is discovered that for the case of non-zero self-consistent magnetic field the stationary beam propagation is violated, the partial emittance oscillations being observed. The found time- dependence of the partial emittances and the beam envelopes illustrates the effect of emittance transfer caused by the coupled particle motion in magnetic field.
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WEPSB010	The Use of Multi-Objective Genetic Algorithms for Accelerator and Light Source Optimization	lattice, operation, dynamic-aperture, quadrupole	376
	Y.A. Fomin, V. Korchuganov, A.S. Smygacheva NRC, Moscow, Russia
	Funding: The reported study was funded by RFBR according to the research project No. 16-32-00336 mol_a. The nonlinear effects are very important in the development of new accelerators and synchrotron light sources. Nowadays they are one of the main factors limiting the achievement of the required facility parameters. In many cases in the development of new accelerators the analytical estimations give very coarse results and in some cases they don't apply at all. Therefore, the best way to research and design accelerators is to use numerical simulation. Nevertheless, very often during complex physical process simulation (taking into account many nonlinear effects) the use of classical optimization methods is difficult and does not give the desired results. The article deals with the application of multi-objective optimization using genetic algorithms for accelerators and light sources. These algorithms allow both simple linear and complex nonlinear accelerator structures to be optimized with the same effectiveness to achieve the required facility parameters.
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WEPSB014	Symmetrical Parameterization for 6D Fully Coupled One-Turn Transport Matrix	coupling, lattice, operation, synchrotron	389
	S.A. Glukhov BINP SB RAS, Novosibirsk, Russia
	Symmetry properties of 6D and 4D one-turn symplectic transport matrices were studied. A new parameterization was proposed for 6D matrix, which is an extension of the Lebedev-Bogacz parameterization for 4D case. The parameterization is fully symmetric relative to radial, vertical and longitudinal motion. It can be useful for lattices with strong coupling between all degrees of freedom.
	Poster WEPSB014 [0.908 MB]
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WEPSB024	Program Complex for Modeling of the Beam Transverse Dynamics and Orbit Correction in Nuclotron, LHEP JINR	pick-up, multipole, software, transverse-dynamics	414
	I.V. Antropov, V.O. Khomutova, V.A. Kozynchenko, D.A. Ovsyannikov, A.O. Sidorin, G.V. Trubnikov Saint Petersburg State University, Saint Petersburg, Russia I.L. Avvakumova, A.O. Sidorin, G.V. Trubnikov JINR/VBLHEP, Dubna, Moscow region, Russia O.S. Kozlov, V.A. Mikhaylov JINR, Dubna, Moscow Region, Russia
	Program complex for modelling of transverse dynamic of particle beams and orbit correction at Nuclotron synchrotron (LHEP JINR) is considered in current work. The program complex provides calculation of transverse dynamic of charged particle beams in Nuclotron and its axis, based on linear model with transport matrix of lattice elements, calculation of Nuclotron Twiss parameters, acceptance and emittance of the beam. A possibility to optimize the location of beam position monitors (pick-up) and multipole correctors is foreseen as well as calculation of the orbit with measuring data of pick-up stations of Nuclotron. Program complex includes realizations of orbit correction algorithms with response matrix and provides correction of the orbit in Nuclotron. User's graphic interface provides interaction of user with program complex, including performance on demand of the user of separate functions of the program complex, providing input and maintenance of parameters, download from file and record into the file of parameters and calculation results, graphical view of the calculations results in program complex. Program software environment is integrated with MAD-X program (upload, processing of data to and from, visualization). Format of input and output data is compatible with relevant MAD-X format.
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WEPSB037	Beam Transfer From Heavy-Ion Linear Accelerator HILAC Into Booster of NICA Accelerator Complex	booster, injection, kicker, ion	443
	A. Tuzikov, A.V. Butenko, A.A. Fateev, S.Yu. Kolesnikov, I.N. Meshkov, V.A. Mikhaylov, V.S. Shvetsov, A.O. Sidorin, A.I. Sidorov, G.V. Trubnikov, V. Volkov JINR, Dubna, Moscow Region, Russia
	Designs of systems of ion beam transfer from the linear accelerator HILAC into the Booster of the NICA accelerator complex (JINR, Dubna) including the transport beam line HILAC-Booster and the beam injection system of the Booster are considered in the report. The proposed systems provide multivariant injection for accumulation of beams in the Booster with required intensity. Special attention is paid to various aspects of beam dynamics during its transfer. Main methods of beam injection into the Booster are described. These are single-turn, multiturn and multiple injection ones. Results of beam dynamics simulations are presented. Status of technical design and manufacturing of the systems' equipment is also highlighted.
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WEPSB071	Charged Beams Optical Properties of Scattering Media	scattering, target, interface, optics	521
	V.G. Kurakin, P.V. Kurakin LPI, Moscow, Russia
	In some accelerator based applications scattering media are placed on beam path. It may be internal beam target, dielectric film or metallic foil to separate volumes with different gas pressure during beam extraction from accelerator, roughing target in charge changing injection in circular accelerator and storage ring and so on. In particular cases detailed knowledge of beam dynamics in scattering media is necessary. This is especially true, for example, in the case of recovery energy accelerator where accelerated in superconducting linac high energy electron beam is directed again to accelerator after interaction with target. Distribution function for scattering angle and transverse displacement is used to derive the phase-plane portrait transformation in scattering medium for incoming charged particle beam. The phase-plane portrait of scattered beam depends strongly on incoming beam ellipse proportions and orientation, and simple matching conditions and expression has been derived. It is shown as well that in heterogeneous medium incident beam experiences trajectory refraction at the out coming medium border. Refraction factor has been calculated for an off-normal incidence of a beam. It is worth to note that refractive property of scattering media may for used for beam focusing.
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THPSC053	The Pepper-Pot Emittance Measuring Device at the 400 keV H-minus LEBT Channel	H-minus, ion, linac, acceleration	653
	V.S. Klenov, S. Bragin, O.T. Frolov, S.E. Golubovski, O.V. Grekhov, O. Volodkevich, V. Zubets RAS/INR, Moscow, Russia
	The emittance measuring device has been developed for operational control of INR RAS linac 400 keV H-minus injector beam parameters. It includes the "pepper-pot", the quartz screen, the CCD camera, PC, the software for camera data processing and beam phase portrait formation. The device has been mounted at the first straight section extension of H-minus LEBT after 45 degree bending magnet. When the bending magnet is switched off the device is possible to measure and to represent single shot beam phase portrait. The results of the H-minus beam emittance measurements and the device performance have been discussed.
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Paper

Title

Other Keywords

Page

FRCAMH06

Simulation of Two-Plane Painting Multiturn Injection into BRing with Space Charge Effect

injection, space-charge, simulation, septum

163

A.V. Smirnov
JINR, Dubna, Moscow Region, Russia
W.P. Chai, G.F. Qu, L.P. Yao
IMP/CAS, Lanzhou, People's Republic of China

The new project HIAF is under design now in IMP (Lanzhou, China). One of the aim of the project is to accumulate about 1.4·10¹¹ ions U³⁴⁺ in the booster ring (BRing) at the injection energy 17 MeV/u. Two-plan injection procedure in horizontal and vertical spaces was proposed to fill out full acceptance of BRing. The optimization of injection parameters is presented in this report. The space charge effect was estimated with the molecular dynamics technique which was effectively used for the crystalline beam simulation.

Slides FRCAMH06 [4.324 MB]

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THCASH01

Effective RF Deflecting Structures for Bunch Rotation and Deflection

operation, linac, RF-structure, luminosity

201

V.V. Paramonov
RAS/INR, Moscow, Russia

Deflecting RF Structures find now applications for the bunch rotation with the purposes of diagnostic for the longitudinal distribution, emittance exchange and for the luminosity improvements in colliders. Report describes results of R&D program for development of deflectors with minimized level of aberrations in the distribution of deflecting field. Such structures, applied for bunch rotation along transverse axis, provide much smaller emittence growth, as compared to another options. In comparison with classical and widely used deflectors, based on disk loaded waveguide, developed structures have, depending on modification, in 2-6 times higher RF efficiency. Structures can operate both in Traveling Wave (TW) and in Standing Wave (SW) modes. To create long RF cavities for SW operation, compensated (bi-periodical) options are developed, combining field stability and high RF efficiency. The problem of stabilization for the plane of deflection is removed due to essentially 3D geometry. The main solutions for such structures development are described and achieved parameters are reported.

Slides THCASH01 [6.084 MB]

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TUPSA016

Beam Simulation and Measurements at Beam Line to RADEX Experimental Area of INR Linac

linac, quadrupole, proton, simulation

250

V.N. Aseev, S. Bragin, S.A. Gavrilov, P.I. Reinhardt-Nickoulin, O. Volodkevich
RAS/INR, Moscow, Russia

In 2015 the experimental complex beam lines of INR linac were upgraded. There is a need to study beam dynamics in these lines. The results of beam simulation at beam line to RADEX experimental area and comparison with beam measurements are presented.

Export •

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

TUPSA061

Comparative Research of Low Energy Beam Transport Systems for H-minus Ion Beam

ion, solenoid, simulation, quadrupole

333

B.A. Frolov
IHEP, Moscow Region, Russia
V.S. Klenov
RAS/INR, Moscow, Russia

The source of H-minus ions for the injection in LU-30 accelerator is being constructed at IHEP. A three-dimensional (3D)simulation code IBSimu has been utilized for modeling of the transport and matching system of beam from the H-minus ion source into RFQ. A magnetic low energy beam transport (LEBT) line consisting of two solenoids and LEBT consisting of six magnetic quadrupole lenses were analyzed. The particle data from the 50 mA 100 keV ion beam extraction system simulations were taken as the starting data for the LEBT simulations. The main objective of the project was to achieve the required Twiss parameters and to minimize emittance growth at RFQ entrance. The LEBT consisting of two solenoids is more convenient in adjustment and as simulation results have shown this system offers more acceptable beam characteristics at the match point in comparison with LEBT composed of quadrupole lenses.

Export •

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

WEPSB009

The Behavior of Powerful Relativistic Electron Beam With Elliptical Cross-Section in Longitudinal Magnetic Field

electron, quadrupole, cathode

373

A.S. Chikhachev
Allrussian Electrotechnical Institute, Moskow, Russia
H.Y. Barminova
MEPhI, Moscow, Russia

The behavior of relativistic intense electron beam with elliptical cross-section moving in a longitudinal magnetic field is investigated with the help of self-consistent model. The solutions for the beam envelopes are obtained in the case of the beam current differed from Alfven limit and the beam charge neutralized. The conditions of stationary beam propagation are determined, however it is discovered that for the case of non-zero self-consistent magnetic field the stationary beam propagation is violated, the partial emittance oscillations being observed. The found time- dependence of the partial emittances and the beam envelopes illustrates the effect of emittance transfer caused by the coupled particle motion in magnetic field.

Export •

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

WEPSB010

The Use of Multi-Objective Genetic Algorithms for Accelerator and Light Source Optimization

lattice, operation, dynamic-aperture, quadrupole

376

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

Funding: The reported study was funded by RFBR according to the research project No. 16-32-00336 mol_a.
The nonlinear effects are very important in the development of new accelerators and synchrotron light sources. Nowadays they are one of the main factors limiting the achievement of the required facility parameters. In many cases in the development of new accelerators the analytical estimations give very coarse results and in some cases they don't apply at all. Therefore, the best way to research and design accelerators is to use numerical simulation. Nevertheless, very often during complex physical process simulation (taking into account many nonlinear effects) the use of classical optimization methods is difficult and does not give the desired results. The article deals with the application of multi-objective optimization using genetic algorithms for accelerators and light sources. These algorithms allow both simple linear and complex nonlinear accelerator structures to be optimized with the same effectiveness to achieve the required facility parameters.

Export •

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

WEPSB014

Symmetrical Parameterization for 6D Fully Coupled One-Turn Transport Matrix

coupling, lattice, operation, synchrotron

389

S.A. Glukhov
BINP SB RAS, Novosibirsk, Russia

Symmetry properties of 6D and 4D one-turn symplectic transport matrices were studied. A new parameterization was proposed for 6D matrix, which is an extension of the Lebedev-Bogacz parameterization for 4D case. The parameterization is fully symmetric relative to radial, vertical and longitudinal motion. It can be useful for lattices with strong coupling between all degrees of freedom.

Poster WEPSB014 [0.908 MB]

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WEPSB024

Program Complex for Modeling of the Beam Transverse Dynamics and Orbit Correction in Nuclotron, LHEP JINR

pick-up, multipole, software, transverse-dynamics

414

I.V. Antropov, V.O. Khomutova, V.A. Kozynchenko, D.A. Ovsyannikov, A.O. Sidorin, G.V. Trubnikov
Saint Petersburg State University, Saint Petersburg, Russia
I.L. Avvakumova, A.O. Sidorin, G.V. Trubnikov
JINR/VBLHEP, Dubna, Moscow region, Russia
O.S. Kozlov, V.A. Mikhaylov
JINR, Dubna, Moscow Region, Russia

Program complex for modelling of transverse dynamic of particle beams and orbit correction at Nuclotron synchrotron (LHEP JINR) is considered in current work. The program complex provides calculation of transverse dynamic of charged particle beams in Nuclotron and its axis, based on linear model with transport matrix of lattice elements, calculation of Nuclotron Twiss parameters, acceptance and emittance of the beam. A possibility to optimize the location of beam position monitors (pick-up) and multipole correctors is foreseen as well as calculation of the orbit with measuring data of pick-up stations of Nuclotron. Program complex includes realizations of orbit correction algorithms with response matrix and provides correction of the orbit in Nuclotron. User's graphic interface provides interaction of user with program complex, including performance on demand of the user of separate functions of the program complex, providing input and maintenance of parameters, download from file and record into the file of parameters and calculation results, graphical view of the calculations results in program complex. Program software environment is integrated with MAD-X program (upload, processing of data to and from, visualization). Format of input and output data is compatible with relevant MAD-X format.

Export •

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

WEPSB037

Beam Transfer From Heavy-Ion Linear Accelerator HILAC Into Booster of NICA Accelerator Complex

booster, injection, kicker, ion

443

A. Tuzikov, A.V. Butenko, A.A. Fateev, S.Yu. Kolesnikov, I.N. Meshkov, V.A. Mikhaylov, V.S. Shvetsov, A.O. Sidorin, A.I. Sidorov, G.V. Trubnikov, V. Volkov
JINR, Dubna, Moscow Region, Russia

Designs of systems of ion beam transfer from the linear accelerator HILAC into the Booster of the NICA accelerator complex (JINR, Dubna) including the transport beam line HILAC-Booster and the beam injection system of the Booster are considered in the report. The proposed systems provide multivariant injection for accumulation of beams in the Booster with required intensity. Special attention is paid to various aspects of beam dynamics during its transfer. Main methods of beam injection into the Booster are described. These are single-turn, multiturn and multiple injection ones. Results of beam dynamics simulations are presented. Status of technical design and manufacturing of the systems' equipment is also highlighted.

Export •

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

WEPSB071

Charged Beams Optical Properties of Scattering Media

scattering, target, interface, optics

521

V.G. Kurakin, P.V. Kurakin
LPI, Moscow, Russia

In some accelerator based applications scattering media are placed on beam path. It may be internal beam target, dielectric film or metallic foil to separate volumes with different gas pressure during beam extraction from accelerator, roughing target in charge changing injection in circular accelerator and storage ring and so on. In particular cases detailed knowledge of beam dynamics in scattering media is necessary. This is especially true, for example, in the case of recovery energy accelerator where accelerated in superconducting linac high energy electron beam is directed again to accelerator after interaction with target. Distribution function for scattering angle and transverse displacement is used to derive the phase-plane portrait transformation in scattering medium for incoming charged particle beam. The phase-plane portrait of scattered beam depends strongly on incoming beam ellipse proportions and orientation, and simple matching conditions and expression has been derived. It is shown as well that in heterogeneous medium incident beam experiences trajectory refraction at the out coming medium border. Refraction factor has been calculated for an off-normal incidence of a beam. It is worth to note that refractive property of scattering media may for used for beam focusing.

Export •

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

THPSC053

The Pepper-Pot Emittance Measuring Device at the 400 keV H-minus LEBT Channel

H-minus, ion, linac, acceleration

653

V.S. Klenov, S. Bragin, O.T. Frolov, S.E. Golubovski, O.V. Grekhov, O. Volodkevich, V. Zubets
RAS/INR, Moscow, Russia

The emittance measuring device has been developed for operational control of INR RAS linac 400 keV H-minus injector beam parameters. It includes the "pepper-pot", the quartz screen, the CCD camera, PC, the software for camera data processing and beam phase portrait formation. The device has been mounted at the first straight section extension of H-minus LEBT after 45 degree bending magnet. When the bending magnet is switched off the device is possible to measure and to represent single shot beam phase portrait. The results of the H-minus beam emittance measurements and the device performance have been discussed.

Export •

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