RuPAC2016 - List of Keywords (quadrupole)

Paper	Title	Other Keywords	Page
TUCAMH01	Planar Superconducting Undulator With Neutral Poles	undulator, vacuum, radiation, wiggler	21
	N.A. Mezentsev, S.V. Khrushchev, V.A. Shkaruba, V.M. Syrovatin, V.M. Tsukanov BINP SB RAS, Novosibirsk, Russia
	Superconducting undulator with use of neutral poles was proposed in Budker INP. Period of the undulator is 15.6 mm. Pole gap and magnetic field are equal to 8 mm and 1.2 T correspondingly. A prototype of the undulator with 15 periods was fabricated and successfully tested. Calculations, design and test results of the prototype in the report are presented. The cryogenic and vacuum system of the undulator are discussed.
	Slides TUCAMH01 [7.848 MB]
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WECBMH02	Collector Ring Project at FAIR: Present Status	injection, lattice, sextupole, operation	86
	P.Yu. Shatunov, V.V. Anashin, E.A. Bekhtenev, D.E. Berkaev, M.I. Bryzgunov, D. Gurov, A.S. Kasaev, V.V. Kolmogorov, I. Koop, A.A. Krasnov, O.I. Meshkov, Yu. A. Rogovsky, T.V. Rybitskaya, A.V. Semenov, Y.M. Shatunov, S.V. Shiyankov, D.B. Shwartz, A.A. Starostenko, A.V. Sukhanov, A.S. Tsyganov, A.V. Utkin BINP SB RAS, Novosibirsk, Russia
	In November 2013, the FAIR management delegated the responsibility for the technical design, construction, installation, and commissioning of the whole CR and its components from GSI to Budker Institute of Nuclear Physics (BINP). Since that time a lot of modifications of the original design were made aiming to improve the beam parameters and the machine performance. This work shows the present status of the development.
	Slides WECBMH02 [20.497 MB]
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THZMH01	SC and HTS-related Activity at IHEP	dipole, solenoid, electron, superconductivity	128
	S. Kozub, A.I. Ageev, I. Bogdanov, E. Kashtanov, V.A. Pokrovsky, P.A. Shcherbakov, L.S. Shirshov, V.I. Shuvalov, I. Slabodchikov, V. Sytnik, L. Tkachenko, O.V. Trusov, S. Zinchenko IHEP, Moscow Region, Russia
	The SC program at IHEP of NRC Â“Kurchatov InstituteÂ” has been developed intensively in the 1980ies in the framework of the UNK project. More than a hundred of models of the SC magnets of various designs, and then the pilot batch consisting of 25 full-scale dipoles and 4 quadrupoles have been designed, manufactured and tested at IHEP. Two SC magnetic systems of Electron Lens for the Tevatron collider were developed, manufactured, shipped and successfully brought into operation. Development of fast-cycling SC magnets for the FAIR project is discussed. Racetrack coils from HTS-2G tape for electrical machines that were developed, manufactured and tested are reported. Test and trial results with HTS dipole magnets employing Bi2223 as well as second-generation HTS are also reviewed.
	Slides THZMH01 [6.546 MB]
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THCDMH01	Conceptual Design of Superconducting Combined-Function Magnets for the Next Generation of Beam Cancer Therapy Gantry	proton, dipole, sextupole, superconducting-magnet	138
	S.T. Sanfilippo, A. Anghel, C. Calzolaio, A. Gerbershagen, J.M. Schippers PSI, Villigen PSI, Switzerland
	An increasing number of proton therapy facilities are being planned and built at hospital based centers. Many facilities use rotatable gantry beamlines to direct the proton or ion-beam at the patient from different angles. A key issue is the need to make future gantries lighter and more compact with the use of cryogen-free superconducting magnets, in particular for the final bending section which can be of large aperture. Benefits of using the superconducting technology are: (1) the possibility to have a large momentum acceptance, hence reducing the need to ramp the magnet and enabling new treatment techniques, (2) the size reduction due to a lower bend radius and (3) the weight reduction up to a factor ten. The latter will also significantly reduce the costs of the supporting structure. We present a conceptual design based on Nb3Sn superconducting combined function magnets (dipole, quadrupole, sextupole). The geometry using racetracks, the superconducting strand and cable parameters and the results of the thermal and the mechanical studies are reported. These magnets will work at a temperature of about 4.2 K cooled with cryocoolers.
	Slides THCDMH01 [7.959 MB]
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FRCAMH07	NICA Collider Lattice Optimization	collider, ion, dipole, lattice	166
	O.S. Kozlov, A.V. Butenko, H.G. Khodzhibagiyan, S.A. Kostromin, I.N. Meshkov, A.O. Sidorin, E. Syresin, G.V. Trubnikov JINR, Dubna, Moscow Region, Russia
	The Nuclotron-based Ion Collider fAcility (NICA) - accelerator complex is being constructed at JINR. It is aimed to the collider experiments with ions and protons and has to provide the ion-ion (Au+79) and ion-proton collision in the energy range of 1-4.5 GeV/amu and also polarized proton-proton and deuteron-deuteron collisions. Each of two collider ring has a racetrack shape with two bending arcs and two long straight sections. Beams are separated in vertical plane and come into collisions in two IPs. Dynamic aperture of the NICA collider has been studied for different parameters of the optics at IP. Effects of the fringe fields of structural elements are considered in the optimization of the collider lattice.
	Slides FRCAMH07 [4.547 MB]
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FRCAMH08	Dynamic Aperture Optimization of the NICA Collider	octupole, lattice, dynamic-aperture, resonance	169
	S.A. Glukhov, E.B. Levichev BINP SB RAS, Novosibirsk, Russia
	NICA is a proton and heavy ion collider being built at JINR in Dubna, Russia. It was shown that nonlinear quadrupole fringe fields are among the main factors limiting dynamic aperture of the machine. In the present paper the following ways of dynamic aperture optimization were studied: betatron tunes optimization and placing octupole lenses to the lattice to compensate fringe fields' effect.
	Slides FRCAMH08 [2.480 MB]
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TUPSA016	Beam Simulation and Measurements at Beam Line to RADEX Experimental Area of INR Linac	linac, proton, simulation, emittance	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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TUPSA041	High-Energy Micro-Buncher Based on the mm-Wavelength Dielectric Structure	proton, electron, wakefield, plasma	303
	A.V. Petrenko CERN, Geneva, Switzerland I.L. Sheinman LETI, Saint-Petersburg, Russia
	The proton-driven plasma wakefield acceleration is a recently proposed technique promising a GeV/m rate of acceleration to a TeV-scale energy in a single plasma stage. In order to excite high-amplitude plasma wakefields a long proton bunch from a synchrotron should be broken into a sequence of sub-mm long micro-bunches which can drive the plasma oscillations resonantly. We suggest a novel approach to produce the required train of micro-bunches using collinear wakefield acceleration in a dielectric-loaded structures. First the energy modulation is introduced into the proton beam with the help of the mm-wavelength dielectric accelerating structure. Then the energy modulation is transformed into the longitudinal micro-bunching using proton beamline with magnetic dipoles. Beam dynamics simulations were used to find the appropriate parameters of the dielectric accelerating structure, driving electron bunch and the beam focusing system.
	Poster TUPSA041 [0.792 MB]
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TUPSA061	Comparative Research of Low Energy Beam Transport Systems for H-minus Ion Beam	ion, emittance, solenoid, simulation	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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TUPSA069	Optimization of an RF Probe Vicinity for RF Gun Cavities	cavity, gun, HOM, simulation	348
	V.V. Paramonov RAS/INR, Moscow, Russia
	To provide electron bunches with exceptionally high brightness, RF gun cavity should operate with the extreme electric and magnetic fields. The RF probe is required for the mostly reliable and precise measurements of the RF field phase and amplitude directly from the cavity. The implementation of an RF probe in the cavity design generates a set of coupled problems, which is analyzed and compared for different operating frequencies and different RF pulse length. Both general dependencies and particularities are considered. Some recommendations for practical choice of the RF probe are presented.
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WEPSB004	The Intelligent Object-oriented Interface in the Design Environment of The Charged Particles Relativistic Beams Transport Channels	focusing, electron, interface, software	357
	G.P. Averyanov, V.A. Budkin, A.V. Kobylyatskiy, I.O. Osadchuk MEPhI, Moscow, Russia
	The effectiveness of the design during the computer modeling is significantly determined by the user interface convenience of the application package and the time adaptation of the user to that application. This paper presents a new approach in the implementation of KATRAN software interface for the transport channels design of the charged particles relativistic beams. The interface is a sequence of operations for the designer during the virtual channel creation ' setting beam parameters at the channel input, the choice of the displayed elements of the channel, the channel assembly, setting the calculation algorithm with the parameters optimization. Thus the immersion of the designer into the details of the computing environment, the features of the software and channel modeling mathematical methods is not needed. The data objects are the typical elements of the transport channels (quadrupole lenses, magnets, open intervals, etc.). The work is carried out in interactive mode. After the "build and run" of the channel is finished, the full-screen multi-factor analysis of all major parameters of the beam and channel transparency is provided.
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WEPSB009	The Behavior of Powerful Relativistic Electron Beam With Elliptical Cross-Section in Longitudinal Magnetic Field	emittance, electron, 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	emittance, lattice, operation, dynamic-aperture	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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WEPSB011	About Development System for the Analysis of Charged Particle Beam Dynamics	controls, acceleration, focusing, distributed	379
	M.Yu. Balabanov Saint Petersburg State University, Saint Petersburg, Russia
	Modern research process of scientific problems often requires large computational resources. To solve them we have to use distributed computing systems. Researcher groups need to use them simultanieously and mostly remotely. The paper describes build of the distributed system for collaborative research process. As example was chosen a problem of the optimization dynamics charged particle beams using high-performance computing systems. The solution of many topical tasks leads to nonlinear optimization problems for example the controlling beams of charged particles. Optimization is performed by minimizing some quality functional the choice of which is a corollary fact that the control functions which provides a functional minimum should determine the accelerating structure with the desired characteristics. The problem is usually formulated as finding the control functions for which the controlled system satisfies the given constraints. There is a necessity of the quality functional choice which ensures the problem solution. Research objectives: the development of a distributed information-computational system for the analysis of charged particle beam dynamics.
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WEPSB018	Beam Dynamics Calculation of Electron Bunch Sequence Passing Through Dielectric	radiation, focusing, electron, wakefield	401
	A. Altmark LETI, Saint-Petersburg, Russia A. Kanareykin Euclid TechLabs, LLC, Solon, Ohio, USA
	Funding: Grant 15-02-08745 from the Russian Foundation for Basic Research. The present work involves modeling the electron beams dynamics for development of new THz source based on cylindrical dielectric waveguide. The sequence of relativistic electron bunch generates Cherenkov radiation, which is a superposition of the TM and HEM-modes. The distances between bunches is selected for creating of monochromatic THz radiation. We made calculation of beam dynamics taking into account the Space Charge and focusing field with help of original BBU 3000 code. We present result for different parameters of waveguide and different offsets of bunches. The main parameter of radiation was investigated: length of wave pocket, monochromaticity and frequency. Altmark A, Kanareykin A. The source of THz radiation based on dielectric waveguide excited by sequence of electron bunches// 2016 J. Phys.: Conf. Ser. 732 012037
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WEPSB033	Focusing of Charged Particles by Magnetic Dipoles	dipole, focusing, induction, betatron	431
	G.V. Dolbilov JINR, Dubna, Moscow Region, Russia
	The possibility of using magnetic dipoles for tight focusing of charged particles is discussed. Plane-parallel geometry of the magnetic poles of the dipoles greatly simplifies lens design and reduces the cost of creating a focusing system. Focusing is performed using gradient pulses of force of the magnetic dipoles.
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WEPSB044	Design and Calculation of Cylindrical Electrostatic Deflector for the Transport Channel of the Heavy Ion Beam	ion, cyclotron, sextupole, heavy-ion	461
	N.Yu. Kazarinov, I.V. Kalagin JINR, Dubna, Moscow Region, Russia S.G. Zemlyanoy JINR/FLNR, Moscow region, Russia
	The cylindrical electrostatic deflector is used in the beam transport channel of GALS spectrometer that is created at U400M cyclotron in Flerov Lab of Nuclear Reaction of Joint Institute for Nuclear research. The design and calculation of the deflector are presented in this report. The angular length of the electrodes and gap between potential electrode and screen are found by using of the minimization procedure.
	Poster WEPSB044 [0.604 MB]
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THPSC010	Magnetic Measurement System For The NICA Quadrupole Magnets	booster, collider, superconducting-magnet, cryogenics	559
	A.V. Shemchuk JINR/VBLHEP, Dubna, Moscow region, Russia V.V. Borisov, A.V. Bychkov, A.M. Donyagin, O. Golubitsky, H.G. Khodzhibagiyan, S.A. Kostromin, M.M. Omelyanenko, M.M. Shandov JINR, Dubna, Moscow Region, Russia
	NICA booster magnetic system consists of 40 dipole and 48 quadrupole superconducting magnets. Measurement of magnetic field parameters is assumed for each booster magnets. The booster quadrupole is 0.45 m-long, 47.5 mm pole radius magnet with design similar to the Nuclotron type quadrupole magnet. Focusing and defocusing quadrupole magnets are jointed in doublets. They will produce fields up to 21.5 T/m. Two magnetic measurements system with tangential and radial coils arrays were developed and produced. This paper describes the magnetic measurements methods as well as the first results of the magnetic measurements.
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THPSC043	Series Magnetic Measurements Of NICA Booster Dipoles	dipole, booster, coupling, electron	629
	V.V. Borisov, A.V. Bychkov, A.M. Donyagin, O. Golubitsky, H.G. Khodzhibagiyan, S.A. Kostromin, M.M. Omelyanenko, M.M. Shandov JINR, Dubna, Moscow Region, Russia A.V. Shemchuk JINR/VBLHEP, Dubna, Moscow region, Russia
	NICA booster magnetic system consists of 40 dipole and 48 quadrupole superconducting (SC) magnets. Measurement of magnetic field parameters is assumed for each booster magnets. At the moment six series dipole magnets are assembled and have passed all tests. Booster dipole magnets are 2.14 m-long, 128 /65 mm (h/v) aperture magnets with design similar to Nuclotron dipole magnet but with curved (14.1 m radius) yoke. They will produce fields up to 1.8 T. The magnetic field parameters will be measured at "warm" (300 K) and "cold" (4.5 K) conditions. The obtained results of magnetic measurements of first five magnets are summarized here.
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Paper

Title

Other Keywords

Page

TUCAMH01

Planar Superconducting Undulator With Neutral Poles

undulator, vacuum, radiation, wiggler

21

N.A. Mezentsev, S.V. Khrushchev, V.A. Shkaruba, V.M. Syrovatin, V.M. Tsukanov
BINP SB RAS, Novosibirsk, Russia

Superconducting undulator with use of neutral poles was proposed in Budker INP. Period of the undulator is 15.6 mm. Pole gap and magnetic field are equal to 8 mm and 1.2 T correspondingly. A prototype of the undulator with 15 periods was fabricated and successfully tested. Calculations, design and test results of the prototype in the report are presented. The cryogenic and vacuum system of the undulator are discussed.

Slides TUCAMH01 [7.848 MB]

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WECBMH02

Collector Ring Project at FAIR: Present Status

injection, lattice, sextupole, operation

86

P.Yu. Shatunov, V.V. Anashin, E.A. Bekhtenev, D.E. Berkaev, M.I. Bryzgunov, D. Gurov, A.S. Kasaev, V.V. Kolmogorov, I. Koop, A.A. Krasnov, O.I. Meshkov, Yu. A. Rogovsky, T.V. Rybitskaya, A.V. Semenov, Y.M. Shatunov, S.V. Shiyankov, D.B. Shwartz, A.A. Starostenko, A.V. Sukhanov, A.S. Tsyganov, A.V. Utkin
BINP SB RAS, Novosibirsk, Russia

In November 2013, the FAIR management delegated the responsibility for the technical design, construction, installation, and commissioning of the whole CR and its components from GSI to Budker Institute of Nuclear Physics (BINP). Since that time a lot of modifications of the original design were made aiming to improve the beam parameters and the machine performance. This work shows the present status of the development.

Slides WECBMH02 [20.497 MB]

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THZMH01

SC and HTS-related Activity at IHEP

dipole, solenoid, electron, superconductivity

128

S. Kozub, A.I. Ageev, I. Bogdanov, E. Kashtanov, V.A. Pokrovsky, P.A. Shcherbakov, L.S. Shirshov, V.I. Shuvalov, I. Slabodchikov, V. Sytnik, L. Tkachenko, O.V. Trusov, S. Zinchenko
IHEP, Moscow Region, Russia

The SC program at IHEP of NRC Â“Kurchatov InstituteÂ” has been developed intensively in the 1980ies in the framework of the UNK project. More than a hundred of models of the SC magnets of various designs, and then the pilot batch consisting of 25 full-scale dipoles and 4 quadrupoles have been designed, manufactured and tested at IHEP. Two SC magnetic systems of Electron Lens for the Tevatron collider were developed, manufactured, shipped and successfully brought into operation. Development of fast-cycling SC magnets for the FAIR project is discussed. Racetrack coils from HTS-2G tape for electrical machines that were developed, manufactured and tested are reported. Test and trial results with HTS dipole magnets employing Bi2223 as well as second-generation HTS are also reviewed.

Slides THZMH01 [6.546 MB]

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THCDMH01

Conceptual Design of Superconducting Combined-Function Magnets for the Next Generation of Beam Cancer Therapy Gantry

proton, dipole, sextupole, superconducting-magnet

138

S.T. Sanfilippo, A. Anghel, C. Calzolaio, A. Gerbershagen, J.M. Schippers
PSI, Villigen PSI, Switzerland

An increasing number of proton therapy facilities are being planned and built at hospital based centers. Many facilities use rotatable gantry beamlines to direct the proton or ion-beam at the patient from different angles. A key issue is the need to make future gantries lighter and more compact with the use of cryogen-free superconducting magnets, in particular for the final bending section which can be of large aperture. Benefits of using the superconducting technology are: (1) the possibility to have a large momentum acceptance, hence reducing the need to ramp the magnet and enabling new treatment techniques, (2) the size reduction due to a lower bend radius and (3) the weight reduction up to a factor ten. The latter will also significantly reduce the costs of the supporting structure. We present a conceptual design based on Nb3Sn superconducting combined function magnets (dipole, quadrupole, sextupole). The geometry using racetracks, the superconducting strand and cable parameters and the results of the thermal and the mechanical studies are reported. These magnets will work at a temperature of about 4.2 K cooled with cryocoolers.

Slides THCDMH01 [7.959 MB]

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FRCAMH07

NICA Collider Lattice Optimization

collider, ion, dipole, lattice

166

O.S. Kozlov, A.V. Butenko, H.G. Khodzhibagiyan, S.A. Kostromin, I.N. Meshkov, A.O. Sidorin, E. Syresin, G.V. Trubnikov
JINR, Dubna, Moscow Region, Russia

The Nuclotron-based Ion Collider fAcility (NICA) - accelerator complex is being constructed at JINR. It is aimed to the collider experiments with ions and protons and has to provide the ion-ion (Au+79) and ion-proton collision in the energy range of 1-4.5 GeV/amu and also polarized proton-proton and deuteron-deuteron collisions. Each of two collider ring has a racetrack shape with two bending arcs and two long straight sections. Beams are separated in vertical plane and come into collisions in two IPs. Dynamic aperture of the NICA collider has been studied for different parameters of the optics at IP. Effects of the fringe fields of structural elements are considered in the optimization of the collider lattice.

Slides FRCAMH07 [4.547 MB]

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FRCAMH08

Dynamic Aperture Optimization of the NICA Collider

octupole, lattice, dynamic-aperture, resonance

169

S.A. Glukhov, E.B. Levichev
BINP SB RAS, Novosibirsk, Russia

NICA is a proton and heavy ion collider being built at JINR in Dubna, Russia. It was shown that nonlinear quadrupole fringe fields are among the main factors limiting dynamic aperture of the machine. In the present paper the following ways of dynamic aperture optimization were studied: betatron tunes optimization and placing octupole lenses to the lattice to compensate fringe fields' effect.

Slides FRCAMH08 [2.480 MB]

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TUPSA016

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

linac, proton, simulation, emittance

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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TUPSA041

High-Energy Micro-Buncher Based on the mm-Wavelength Dielectric Structure

proton, electron, wakefield, plasma

303

A.V. Petrenko
CERN, Geneva, Switzerland
I.L. Sheinman
LETI, Saint-Petersburg, Russia

The proton-driven plasma wakefield acceleration is a recently proposed technique promising a GeV/m rate of acceleration to a TeV-scale energy in a single plasma stage. In order to excite high-amplitude plasma wakefields a long proton bunch from a synchrotron should be broken into a sequence of sub-mm long micro-bunches which can drive the plasma oscillations resonantly. We suggest a novel approach to produce the required train of micro-bunches using collinear wakefield acceleration in a dielectric-loaded structures. First the energy modulation is introduced into the proton beam with the help of the mm-wavelength dielectric accelerating structure. Then the energy modulation is transformed into the longitudinal micro-bunching using proton beamline with magnetic dipoles. Beam dynamics simulations were used to find the appropriate parameters of the dielectric accelerating structure, driving electron bunch and the beam focusing system.

Poster TUPSA041 [0.792 MB]

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TUPSA061

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

ion, emittance, solenoid, simulation

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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TUPSA069

Optimization of an RF Probe Vicinity for RF Gun Cavities

cavity, gun, HOM, simulation

348

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

To provide electron bunches with exceptionally high brightness, RF gun cavity should operate with the extreme electric and magnetic fields. The RF probe is required for the mostly reliable and precise measurements of the RF field phase and amplitude directly from the cavity. The implementation of an RF probe in the cavity design generates a set of coupled problems, which is analyzed and compared for different operating frequencies and different RF pulse length. Both general dependencies and particularities are considered. Some recommendations for practical choice of the RF probe are presented.

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WEPSB004

The Intelligent Object-oriented Interface in the Design Environment of The Charged Particles Relativistic Beams Transport Channels

focusing, electron, interface, software

357

G.P. Averyanov, V.A. Budkin, A.V. Kobylyatskiy, I.O. Osadchuk
MEPhI, Moscow, Russia

The effectiveness of the design during the computer modeling is significantly determined by the user interface convenience of the application package and the time adaptation of the user to that application. This paper presents a new approach in the implementation of KATRAN software interface for the transport channels design of the charged particles relativistic beams. The interface is a sequence of operations for the designer during the virtual channel creation ' setting beam parameters at the channel input, the choice of the displayed elements of the channel, the channel assembly, setting the calculation algorithm with the parameters optimization. Thus the immersion of the designer into the details of the computing environment, the features of the software and channel modeling mathematical methods is not needed. The data objects are the typical elements of the transport channels (quadrupole lenses, magnets, open intervals, etc.). The work is carried out in interactive mode. After the "build and run" of the channel is finished, the full-screen multi-factor analysis of all major parameters of the beam and channel transparency is provided.

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WEPSB009

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

emittance, electron, 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

emittance, lattice, operation, dynamic-aperture

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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WEPSB011

About Development System for the Analysis of Charged Particle Beam Dynamics

controls, acceleration, focusing, distributed

379

M.Yu. Balabanov
Saint Petersburg State University, Saint Petersburg, Russia

Modern research process of scientific problems often requires large computational resources. To solve them we have to use distributed computing systems. Researcher groups need to use them simultanieously and mostly remotely. The paper describes build of the distributed system for collaborative research process. As example was chosen a problem of the optimization dynamics charged particle beams using high-performance computing systems. The solution of many topical tasks leads to nonlinear optimization problems for example the controlling beams of charged particles. Optimization is performed by minimizing some quality functional the choice of which is a corollary fact that the control functions which provides a functional minimum should determine the accelerating structure with the desired characteristics. The problem is usually formulated as finding the control functions for which the controlled system satisfies the given constraints. There is a necessity of the quality functional choice which ensures the problem solution. Research objectives: the development of a distributed information-computational system for the analysis of charged particle beam dynamics.

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WEPSB018

Beam Dynamics Calculation of Electron Bunch Sequence Passing Through Dielectric

radiation, focusing, electron, wakefield

401

A. Altmark
LETI, Saint-Petersburg, Russia
A. Kanareykin
Euclid TechLabs, LLC, Solon, Ohio, USA

Funding: Grant 15-02-08745 from the Russian Foundation for Basic Research.
The present work involves modeling the electron beams dynamics for development of new THz source based on cylindrical dielectric waveguide. The sequence of relativistic electron bunch generates Cherenkov radiation, which is a superposition of the TM and HEM-modes. The distances between bunches is selected for creating of monochromatic THz radiation*. We made calculation of beam dynamics taking into account the Space Charge and focusing field with help of original BBU 3000 code. We present result for different parameters of waveguide and different offsets of bunches. The main parameter of radiation was investigated: length of wave pocket, monochromaticity and frequency.
* Altmark A, Kanareykin A. The source of THz radiation based on dielectric waveguide excited by sequence of electron bunches// 2016 J. Phys.: Conf. Ser. 732 012037

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WEPSB033

Focusing of Charged Particles by Magnetic Dipoles

dipole, focusing, induction, betatron

431

G.V. Dolbilov
JINR, Dubna, Moscow Region, Russia

The possibility of using magnetic dipoles for tight focusing of charged particles is discussed. Plane-parallel geometry of the magnetic poles of the dipoles greatly simplifies lens design and reduces the cost of creating a focusing system. Focusing is performed using gradient pulses of force of the magnetic dipoles.

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WEPSB044

Design and Calculation of Cylindrical Electrostatic Deflector for the Transport Channel of the Heavy Ion Beam

ion, cyclotron, sextupole, heavy-ion

461

N.Yu. Kazarinov, I.V. Kalagin
JINR, Dubna, Moscow Region, Russia
S.G. Zemlyanoy
JINR/FLNR, Moscow region, Russia

The cylindrical electrostatic deflector is used in the beam transport channel of GALS spectrometer that is created at U400M cyclotron in Flerov Lab of Nuclear Reaction of Joint Institute for Nuclear research. The design and calculation of the deflector are presented in this report. The angular length of the electrodes and gap between potential electrode and screen are found by using of the minimization procedure.

Poster WEPSB044 [0.604 MB]

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THPSC010

Magnetic Measurement System For The NICA Quadrupole Magnets

booster, collider, superconducting-magnet, cryogenics

559

A.V. Shemchuk
JINR/VBLHEP, Dubna, Moscow region, Russia
V.V. Borisov, A.V. Bychkov, A.M. Donyagin, O. Golubitsky, H.G. Khodzhibagiyan, S.A. Kostromin, M.M. Omelyanenko, M.M. Shandov
JINR, Dubna, Moscow Region, Russia

NICA booster magnetic system consists of 40 dipole and 48 quadrupole superconducting magnets. Measurement of magnetic field parameters is assumed for each booster magnets. The booster quadrupole is 0.45 m-long, 47.5 mm pole radius magnet with design similar to the Nuclotron type quadrupole magnet. Focusing and defocusing quadrupole magnets are jointed in doublets. They will produce fields up to 21.5 T/m. Two magnetic measurements system with tangential and radial coils arrays were developed and produced. This paper describes the magnetic measurements methods as well as the first results of the magnetic measurements.

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THPSC043

Series Magnetic Measurements Of NICA Booster Dipoles

dipole, booster, coupling, electron

629

V.V. Borisov, A.V. Bychkov, A.M. Donyagin, O. Golubitsky, H.G. Khodzhibagiyan, S.A. Kostromin, M.M. Omelyanenko, M.M. Shandov
JINR, Dubna, Moscow Region, Russia
A.V. Shemchuk
JINR/VBLHEP, Dubna, Moscow region, Russia

NICA booster magnetic system consists of 40 dipole and 48 quadrupole superconducting (SC) magnets. Measurement of magnetic field parameters is assumed for each booster magnets. At the moment six series dipole magnets are assembled and have passed all tests. Booster dipole magnets are 2.14 m-long, 128 /65 mm (h/v) aperture magnets with design similar to Nuclotron dipole magnet but with curved (14.1 m radius) yoke. They will produce fields up to 1.8 T. The magnetic field parameters will be measured at "warm" (300 K) and "cold" (4.5 K) conditions. The obtained results of magnetic measurements of first five magnets are summarized here.

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