RuPAC-2010 - List of Keywords (storage-ring)

A B C D E F G H I K L M O P Q R S T U V W

storage-ring

Paper	Title	Other Keywords	Page
TUPSA018	Intercation of the Biomolecular Ions with the Electron Target in the Electrostatic Storage Ring	ion, electron, target, resonance	80
	S. G. Shirkov JINR, Dubna, Moscow Region
	A nanostructure of the radiation damages is formed at an interaction of decelerated protons or carbon ions with DNA molecules at hadron therapy. A local interaction of the ion beam with the bimolecular structures in the human cells is defined mainly by parameters of the ion tracks. The track core is connected with ionization properties of the charged ion, its cross-section sizes are defined by the delta-electrons. The delta-electron energy varies statistically from several eV to few keV therefore they lead to substance ionization along their trajectory on a distance several nanometers from that point where they were produced. Interaction of the delta-electrons with DNA molecules and other biological structures is one of the important mechanisms realized in process of the hadron therapy. A study of interaction of the accelerated biomolecular ions with an electronic target in electrostatic storage ring was performed for modeling of an input of the delta-electrons in processes of the hadron therapy.

TUPSA032	The TNK Beam Position Monitor System	single-bunch, pick-up, insertion, feedback	110
	E. A. Bekhtenev, G. V. Karpov, E. Shubin BINP SB RAS, Novosibirsk
	New second generation synchrotron radiation source TNK is being built in Zelenograd, Russia. The new FPGA-based beam position monitor (BPM) system for TNK has been developed and produced in BINP. The BPM system requirements for second generation light sources are not as severe as for the third generation light sources. Nevertheless the system is able to perform turn-by-turn measurements and has micron level accuracy. The TNK light source is intended for work both in multiple and in single bunch mode. In the second case the charge of one bunch can achieve the value of 60 nK result in high peak voltages at BPM electrodes. Design features of the BPM system, its parameters and testing results are presented in this paper.

WECHY02	Kurchatov Synchrotron Radiation Source Facilities Modernization	electron, wiggler, controls, injection	136
	V. Korchuganov, A. V. Anoshin, M. Blokhov, Y. A. Fomin, G. A. Kovachev, M. V. Kovalchuk, Y. V. Krylov, V. V. Kvardakov, V. V. Leonov, V. V. Martynenko, V. P. Moryakov, D. G. Odintsov, S. G. Pesterev, Yu. F. Tarasov, S. I. Tomin, V. Ushkov, A. G. Valentinov, A. Vernov, Y. L. Yupinov, A. V. Zabelin RRC, Moscow
	Kurchatov Synchrotron Radiation Source (KSRS) operates in the range of SR from VUV up to hard X-ray. Technical modernization of KSRS systems is under way. It includes a replacement of the power supplies and the nano- and micro-second generators by the new ones, the installation of the new third RF accelerator cavity on 2.5 GeV storage ring SIBERIA-2. The projects of the feedback system for the longitudinal coherent multi-bunch instabilities dumping and of the new sensitive electronics for pick-up stations on Siberia-2 storage ring start in 2010. Three 7.5 T wiggler beam lines were mounted and tested with SR beam in December 2009. The 7.5 T (19+2) poles SC wiggler and new 3 RF cavities are doing the KSRS spectrum harder and intensive. The program tools for KSRS operation are introduced in accelerator control system with a new electronics. The new scheme of top-up energy injection placed outside of Siberia-2 storage ring tunnel is carried out. The report describes a statistics works and plans on KSRS facilities.
	Slides

WECHC02	Electrostatic Storage Rings at the Ultra-low Energies Range	ion, antiproton, lattice, electron	169
	A. I. Papash JINR, Dubna, Moscow Region C. P. Welsch The University of Liverpool, Liverpool
	Electrostatic storage rings have proven to be invaluable tools for atomic and molecular physics at the ultra-low energy range from 1 to 100 keV/A. Due to the mass independence of the electrostastic rigidity, these machines are able to store a wide range of different particles, from light ions to heavy singly charged bio-molecules. Reaction Microscope incorporated into a ring lattice is considered to be a new powerful tool to study high precision effects by multiple crossing of incident beam of ions with ultrasonic gas jet. To enable operation of Reaction Microscope one should provide very short bunches in the 1-2 nanosecond regime in order to pave the way for kinematically complete measurements of the collision dynamics of fundamental few-body quantum systems on the level of differential cross sections. However, earlier measurements at some rings showed strong limitations depending on beam intensity, probably linked to non-linear fields that cannot be completely avoided in such machines. In this contribution, we discuss common features of electrostatic storage rings and analyse rings performance.
	Slides

WEPSB004	Self-stimulated Undulator Radiation Sources	undulator, electron, radiation, emittance	181
	E. G. Bessonov, M. V. Gorbunkov, A. L. Osipov, A. V. Vinogradov LPI, Moscow A. A. Mikhailichenko CLASSE, Ithaca, New York
	The self-stimulated undulator radiation (UR) source is based on a quasi-isochronous storage ring, undulators installed in its straight sections and mirrors installed at both sides of undulators. Mirrors set an optical cavity. Period of oscillation of the UR wavelet (URW) emitted by every particle of the beam in the cavity coincides with common period of revolution of particles in storage ring. The URWs are accumulated in optical cavity by superposition one by another with the accuracy better than the wavelength of the UR. Intensity, which becomes higher by Q times, where Q is the quality factor of optical cavity. If conditions of synchronicity are violated weakly then properties of UR might be different: intensity will drop, monochromaticity will be increased. The selfstimulation of the spontaneous incoherent emission of radiation in the scheme can lead to an increase the seeding process for the SASE regime. The requirements to parameters of the beam and the degree of synchronicity are evaluated. Ordinary and compact storage rings using ordinary and laser undulators and generation of continuous, quasi-monochromatic radiation in the optical to X-ray regions are considered. E. G.Bessonov, M. V.Gorbunkov, A. A.Mikhailichenko, A. L.Osipov, Self-stimulated Emission of Undulator Radiation, http://arxiv.org/abs 10⁰³.3747 .

WEPSB005	Light Sources in Russia	electron, radiation, ion, undulator	184
	E. G. Bessonov LPI, Moscow
	Possible ways of development of Light Sources based on charged particle accelerators and storage rings in Russia are discussed.

WEPSB021	RF Cavities HOM Longitudinal Instabilities at SR Source Siberia-2 in KCSR	injection, synchrotron, electron, feedback	210
	V. I. Moiseev, V. Korchuganov, A. Vernov RRC, Moscow
	The electron beam parameters stability and its lifetime depend on the resonant excitation by RF cavities HOMs. The instability rising links with the temperature change, the sequent tune of RF cavities and the synchrotron tune change. Besides that the different intensity bunch distribution along the orbit influences strongly on the instability appearance. For the instabilities study and their identification the spectrum analyzing is used. The results of instabilities study at SR source Siberia-2 is presented in the report.

WEPSB034	Wideband BPM Electronics for the VEPP-4M Collider	electron, positron, collider, pick-up	245
	E. A. Bekhtenev, G. V. Karpov BINP SB RAS, Novosibirsk
	New beam position monitor (BPM) FPGA-based electronics has been developed and tested at the VEPP-4M electron-positron collider. The VEPP-4M operates with two electron and two positron bunches. Compared to the old BPM electronics the new one can measure the position of each of four bunches with any BPM of storage ring including the BPMs near interaction point. Wide bandwidth of electronics (200 MHz) allows the separate measurements of electron and positron bunches with time interval between bunches up to 20 ns. BPM system works at two modes: slow closed orbit measurements and turn-by-turn measurements. We present details of system design and operation

WEPSB041	CANopen Connected Power Supply Control Systems for the Electron Linacs	power-supply, controls, linac, electron	266
	A. S. Chepurnov MSU SINP, Moscow V. N. Boriskin, A. A. Sarvilov, A. N. Savchenko, D. L. Stepin, G. N. Tsebenko, V. N. Vereshchaka NSC/KIPT, Kharkov I. V. Gribov MSU, Moscow A. F. Shamarin Marathon Ltd., Moscow
	Power supplies which feed magnetic systems of electron linac together with the control system are very critical parts of any linac. The quality of power supplies and control software defines safety of the accelerator operation, stability and cost of operation. One of the today’s tendencies in power supply system architecture is to use distributed CAN-connected power supplies with high level of local intellectual properties. These properties allow to achieve high stability, high safety of operation together with the specific features such as coil temperature check without any temperature sensors. Such programmable power supplies with the intellectual CANopen controller have been designed for the specific accelerator applications. The control system software was adapted to operate with CANopen protocol. Marathon's IPP-1/100 & IPP-4/35 power supplies with CANopen* are used now within the control systems of LU-60m and LU-10 linacs. 3200 hours of continues operation were achieved since the year 2008. * V. N.Boriskin et. al. POWER SUPPLY CONTROL SYSTEM FOR THE LINAC OF THE "NESTOR" STORAGE RING/ Proceedings of RuPAC 2008, Zvenigorod, Russia, 2008, pp.252-254.

THCHC05	A Family of Twenty-Amperes Power Supplies for Multipole Correctors for Accelerators and Storage Rings	power-supply, controls, feedback, impedance	306
	O. V. Belikov, V. R. Kozak, A. S. Medvedko BINP SB RAS, Novosibirsk
	This report presents three types of direct current supplies that have been developed at BINP SB RAS. Their maximum current values are ±20А with output voltage up to ±50V, ±100V, ±150V. The power supplies are intended for steering electromagnets of colliders and storage rings, operating as the Synchrotron Radiation sources. The power supply channel occupies a 3U subunit crate (432355133mm) of the "Euromechanics" standard. Specialized units are used to control and monitor the power supplies through the CAN-bus interface. The output current accuracy is of the order of 100ppm for 10 hours of operation. This report presents experimental characteristics of the power supplies.
	Slides

THPSC020	Compact Cyclotron as a Proton Source for the Detection of Explosives Based on Nuclear Resonance Absorption in Nitrogen	cyclotron, injection, emittance, ion	363
	L. M. Onischenko, S. B. Vorozhtsov JINR/DLNP, Dubna, Moscow region Yu. G. Alenitsky, A. A. Glazov, E. E. Perepelkin, A. S. Vorozhtsov JINR, Dubna, Moscow Region J. T. Kwan, R. E. Morgado, T.-S. F. Wang LANL, Los Alamos, New Mexico
	In the proposed operational implementation of the Nuclear Resonance Absorption (NRA) method for explosives detection, the inspected object is scanned by a beam of 9.17 MeV gamma rays of a precise energy to determine the fraction of the beam resonantly absorbed in the nitrogen nuclei of the explosive. The 9.17 MeV gamma rays are most readily generated in the inverse reaction, in which a 1.747 MeV proton is resonantly captured by C13, followed by the emission of gamma rays from the recoiling N14 nucleus. To achieve the stringent requirements of a 1.747 MeV proton beam with an intensity of several milliampere and with as small as possible energy spread and angular divergence , a compact isochronous cyclotron with internal H-minus ion source and current of ~2mA was considered as a stand-alone source or as an injector (with a current of ~200 microA) into a storage ring.