RuPAC2014 - List of Authors (Korchuganov, V.)

Paper

Title

Page

Horizontal Emittance Regulation at SIBERIA-2

347

A.G. Valentinov, V. Korchuganov, Y.V. Krylov, Y.L. Yupinov
NRC, Moscow, Russia

Synchrotron radiation (SR) brightness is the most valuable parameter of every SR light source. It depends greatly on horizontal emittance of an electron beam. That's why all modern SR light sources have designed emittance of several nanometers. A horizontal emittance of Siberia-2 now equals to 98 nm. It can be decreased by two ways. First way is to find another working point (betatron tunes) with lower emittance. Maximal possible current values of existing power supplies must be taken into account. Injection efficiency may become worse because of smaller dynamic aperture due to stronger sextupoles. Second way is to rebuild magnetic structure keeping the same betatron tunes. Advantages of this method are good injection efficiency and proved energy ramping process. Modification of the magnetic structure may be done at high energy with more stable electron beam. But the second way is not allowed to reach as lower emittance level as in the first way. Theoretical and practical aspects of these two ways are described in the report. Magnetic structures with dispersion-free straight sections and smooth horizontal dispersion function are presented. Also structure with higher emittance is described in order to reach higher injection efficiency.

THPSC14

Electron Emission and Trapping in Non-Uniform Fields of Magnet Structure and Insertion Devices at SR Source Siberia-2

350

V.I. Moiseev, V. Korchuganov, N.V. Smolyakov
NRC, Moscow, Russia

In vacuum chamber of SR source, scattered photons provide high intensity flows of photo emitted electrons along the magnetic fields lines. The unperturbed electrons reach the opposite walls. The relativistic bunches influence the trajectories of low energy electrons. These electrons can be trapped by non-uniform magnetic field. The low energy electron distributions change the operating settings of the storage ring. For Siberia-2 case, the low energy electron densities are evaluated both in quadrupole lenses and in superconducting wiggler on 7.5 T field. The qualitative description of the trapped electrons behavior was developed. In calculations, the analitical solution was obtained and used for estimations of the single impact of relativistic bunch.

THPSC42

Modernization of the Automated Control System of Kurchatov Synchrotron Radiation Source Using Citect SCADA

417

E.V. Kaportsev, V. Dombrovsky, Y.V. Efimov, V. Korchuganov, Y.V. Krylov, K. Moseev, N.I. Moseiko, A.G. Valentinov
NRC, Moscow, Russia

The running cycle of Kurchatov Synchrotron Radiation Source (KSRS) includes the injection of electrons with energy 80 MeV from the linear accelerator in the booster storage ring Siberia-1, the accumulation of a electron current up to 400 mA and, then, electron energy ramping up to 450 MeV with the subsequent extraction of electrons in the main ring, storage ring Siberia-2, and accumulation there up to 300 mA, and at last the energy ramping up to 2.5 GeV. A few years ago we started modernization of the automated control systems (ACS) of accelerator - storage complex. Modernization has affected the most important parts of the system - the system of data collection and control system. Used advanced solutions based on CAN and VME and modular complexes National Instruments. Currently begins implementation of the Citect SCADA system. In this paper the stages of implementation of the SCADA control system. Showing part of the system, which is already widely used, as well as parts of the system, which is scheduled to launch in the near future.

THY01

Consideration of Approaches to 4-th Generation SR Sources Projects

V. Korchuganov
RRC, Moscow, Russia
V.L. Ushkov
NRC, Moscow, Russia

The obvious question arises: "Are there new opportunities based on new x-ray sources that would lead to novel and transformative science?" SR sources based on linear accelerator have the potential to produce hard X-ray beams limited only by the fundamental wave nature of light. These intense beams can focus to (sub)-nanometer beam waists while maintaining precise collimation, photon energy and polarization. Linac-based light sources can provide either low duty-cycle pulsed beams with enormous peak power – X-ray Free Electron Lasers (X-FELs) – or quasi-continuous beams with exquisite stability and control – the Energy Recovery Linacs (ERLs). The radiation from X-FEL and ERL sources is unique in many ways, both enabling and challenging scientists of all types to invent new tools, techniques and methods to harness the potential of these transformative new sources. One more approach to creation new and modernizations of working sources of SR -Ultimate Storage Ring (USR) Light Sources: the low peak power and high average power provided by high repetition rate ring-based X-ray sources, enabling non-destructive study of experimental samples, complementary to the high peak brightness low rep-rate beams provided by X-ray FELs Ring-based sources will remain a mainstay of X-ray research in the future. This report is an attempt to consider the modern synchrotron light (SR) sources projects of the 4th generation.

THY02

The Status of the Facilities of Kurchatov's Synchrotron Radiation Source

290

V. Korchuganov
RRC, Moscow, Russia
A. Belkov, Y.A. Fomin, E.V. Kaportsev, M.V. Kovalchuk, Y.V. Krylov, V.I. Moiseev, N.I. Moseiko, D.G. Odintsov, S.G. Pesterev, A.S. Smygacheva, S.I. Tomin, V. Ushakov, V.L. Ushkov, A.G. Valentinov, A. Vernov
NRC, Moscow, Russia

The first electron beam had been received 20 years ago in a storage ring SIBERIA-2 - dedicated synchrotron radiation source in the Kurchatov's Institute and, also, the official opening of the Kurchatov's SR source for the experiments marks 15th anniversary in 2014 . The report focuses on the accelerator complex of the SR source, the development of actual SR source systems, SR beam lines and experimental stations by 2014.

Slides THY02 [3.125 MB]

Paper	Title	Page
THPSC13	Horizontal Emittance Regulation at SIBERIA-2	347
	A.G. Valentinov, V. Korchuganov, Y.V. Krylov, Y.L. Yupinov NRC, Moscow, Russia
	Synchrotron radiation (SR) brightness is the most valuable parameter of every SR light source. It depends greatly on horizontal emittance of an electron beam. That's why all modern SR light sources have designed emittance of several nanometers. A horizontal emittance of Siberia-2 now equals to 98 nm. It can be decreased by two ways. First way is to find another working point (betatron tunes) with lower emittance. Maximal possible current values of existing power supplies must be taken into account. Injection efficiency may become worse because of smaller dynamic aperture due to stronger sextupoles. Second way is to rebuild magnetic structure keeping the same betatron tunes. Advantages of this method are good injection efficiency and proved energy ramping process. Modification of the magnetic structure may be done at high energy with more stable electron beam. But the second way is not allowed to reach as lower emittance level as in the first way. Theoretical and practical aspects of these two ways are described in the report. Magnetic structures with dispersion-free straight sections and smooth horizontal dispersion function are presented. Also structure with higher emittance is described in order to reach higher injection efficiency.

THPSC14	Electron Emission and Trapping in Non-Uniform Fields of Magnet Structure and Insertion Devices at SR Source Siberia-2	350
	V.I. Moiseev, V. Korchuganov, N.V. Smolyakov NRC, Moscow, Russia
	In vacuum chamber of SR source, scattered photons provide high intensity flows of photo emitted electrons along the magnetic fields lines. The unperturbed electrons reach the opposite walls. The relativistic bunches influence the trajectories of low energy electrons. These electrons can be trapped by non-uniform magnetic field. The low energy electron distributions change the operating settings of the storage ring. For Siberia-2 case, the low energy electron densities are evaluated both in quadrupole lenses and in superconducting wiggler on 7.5 T field. The qualitative description of the trapped electrons behavior was developed. In calculations, the analitical solution was obtained and used for estimations of the single impact of relativistic bunch.

THPSC42	Modernization of the Automated Control System of Kurchatov Synchrotron Radiation Source Using Citect SCADA	417
	E.V. Kaportsev, V. Dombrovsky, Y.V. Efimov, V. Korchuganov, Y.V. Krylov, K. Moseev, N.I. Moseiko, A.G. Valentinov NRC, Moscow, Russia
	The running cycle of Kurchatov Synchrotron Radiation Source (KSRS) includes the injection of electrons with energy 80 MeV from the linear accelerator in the booster storage ring Siberia-1, the accumulation of a electron current up to 400 mA and, then, electron energy ramping up to 450 MeV with the subsequent extraction of electrons in the main ring, storage ring Siberia-2, and accumulation there up to 300 mA, and at last the energy ramping up to 2.5 GeV. A few years ago we started modernization of the automated control systems (ACS) of accelerator - storage complex. Modernization has affected the most important parts of the system - the system of data collection and control system. Used advanced solutions based on CAN and VME and modular complexes National Instruments. Currently begins implementation of the Citect SCADA system. In this paper the stages of implementation of the SCADA control system. Showing part of the system, which is already widely used, as well as parts of the system, which is scheduled to launch in the near future.

THY01	Consideration of Approaches to 4-th Generation SR Sources Projects
	V. Korchuganov RRC, Moscow, Russia V.L. Ushkov NRC, Moscow, Russia
	The obvious question arises: "Are there new opportunities based on new x-ray sources that would lead to novel and transformative science?" SR sources based on linear accelerator have the potential to produce hard X-ray beams limited only by the fundamental wave nature of light. These intense beams can focus to (sub)-nanometer beam waists while maintaining precise collimation, photon energy and polarization. Linac-based light sources can provide either low duty-cycle pulsed beams with enormous peak power – X-ray Free Electron Lasers (X-FELs) – or quasi-continuous beams with exquisite stability and control – the Energy Recovery Linacs (ERLs). The radiation from X-FEL and ERL sources is unique in many ways, both enabling and challenging scientists of all types to invent new tools, techniques and methods to harness the potential of these transformative new sources. One more approach to creation new and modernizations of working sources of SR -Ultimate Storage Ring (USR) Light Sources: the low peak power and high average power provided by high repetition rate ring-based X-ray sources, enabling non-destructive study of experimental samples, complementary to the high peak brightness low rep-rate beams provided by X-ray FELs Ring-based sources will remain a mainstay of X-ray research in the future. This report is an attempt to consider the modern synchrotron light (SR) sources projects of the 4th generation.

THY02	The Status of the Facilities of Kurchatov's Synchrotron Radiation Source	290
	V. Korchuganov RRC, Moscow, Russia A. Belkov, Y.A. Fomin, E.V. Kaportsev, M.V. Kovalchuk, Y.V. Krylov, V.I. Moiseev, N.I. Moseiko, D.G. Odintsov, S.G. Pesterev, A.S. Smygacheva, S.I. Tomin, V. Ushakov, V.L. Ushkov, A.G. Valentinov, A. Vernov NRC, Moscow, Russia
	The first electron beam had been received 20 years ago in a storage ring SIBERIA-2 - dedicated synchrotron radiation source in the Kurchatov's Institute and, also, the official opening of the Kurchatov's SR source for the experiments marks 15th anniversary in 2014 . The report focuses on the accelerator complex of the SR source, the development of actual SR source systems, SR beam lines and experimental stations by 2014.
	Slides THY02 [3.125 MB]