RuPAC2016 - List of Keywords (focusing)

Paper	Title	Other Keywords	Page
TUPSA006	Development of RF Accelerator on Parallel-Coupled Structure - Trend in Accelerator Technique	cavity, electron, coupling, acceleration	219
	Y.D. Chernousov ICKC, Novosibirsk, Russia
	Development of parallel-coupled accelerating structure (PCS), creation of RF linier accelerator based on PCS is new and rapidly developing field of accelerator technology. Compared with conventional accelerating structures with serial communication - the standard traveling and standing waves structures, the PCS has a lot of features and advantages. There are many problems in the development of RF linear accelerators: breakdowns at high power levels, the destruction of the structure due to overheating, the excitation of higher-order mode, the decline of field strength along the structure, transients, beam loading, beam focusing, multipactor, radiation accelerator cleanliness, etc. PCS - the best accelerating structure for solving these problems.
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TUPSA007	New Experimental Results on RF Accelerator with Parallel-Coupled Structure and RF Controlled Gun	injection, electron, gun, cavity	222
	Y.D. Chernousov ICKC, Novosibirsk, Russia I.M. Ikryanov, I.V. Shebolaev ICKC SB RAS, Novosibirsk, Russia
	New data on the development and experimental investigation of the RF accelerator based on the 9-cavities parallel-coupled accelerating structure that is equipped with a high-frequency grid-controlled electron gun are presented. Accelerating structure, injection system and focusing system are improved. Previously observed second emission resonant discharge - multipactor is suppressed by increasing the field amplitude in the structure first cavity and using the protector. The parameters of the accelerated beam close to the design ones, i.e. electron energy up to 8 MeV, capture to the acceleration mode up to 100%, were received. Capture is provided by the RF electron focusing of the microwave field structure with usage of the magnetic focusing system based on permanent magnets and RF grid control in the electron gun.
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TUPSA009	Electron Beam Dynamics Calculation and Accelerating Structure Geometry Design in 10 MeV Hybrid Electron Linac	linac, electron, coupling, beam-loading	228
	A.V. Bulanov, S.V. Matsievskiy, E.A. Savin, N.P. Sobenin MEPhI, Moscow, Russia
	Electron linear accelerators with an energy of 10 MeV are widely used for industrial purposes. This article presents the electron dynamic calculations and the design of linac with a standing wave (SW) buncher based on the biperiodic accelerating structure and a constant impedance backward traveling wave (BTW) accelerating section after it. In such accelerator, all unused RF power coming out from BTW section is used in SW section to improve the linac efficiency. Thus no RF load is needed. Also, a beam is experiencing an RF focusing in the SW buncher. Solenoid focusing field influence on the beam dynamics in the TW section was studied.
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TUPSA010	Electron Linear Accelerator with the Variable Energy from 6 to 11 MeV	electron, linac, gun, klystron	231
	A.V. Bulanov, E.A. Savin, N.P. Sobenin MEPhI, Moscow, Russia A.V. Gryzlov TORIY, Moscow, Russia
	The standing wave accelerator with the variable energy from 6 to 11 MeV has been designed. Electron energy is controlled by the injected current. The buncher has been designed to provide capture above 70% for the all injected currents range. The possibility of using a permanent radially magnetized toroidal magnet for the beam focusing was studied.
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TUPSA013	Investigation of a Second Order Method of RFQ Channel Optimization	controls, rfq, acceleration, software	240
	O.I. Drivotin St. Petersburg State University, St. Petersburg, Russia D.A. Starikov Saint Petersburg State University, Saint Petersburg, Russia
	This report is devoted to a numerical method of solution of the RFQ structure optimization problem. The problem is considered as a control theory problem. Control functions representing geometry of the electrodes and a quality functional describing the beam are introduced. To solve the problem numerically these control functions are parametrized. The presented method is based on the computation of the derivatives of the first and the second order of the quality functional on the parameters. Results of investigation of efficiency of the method relatively to a method including computation of the derivatives only of the first order are presented.
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TUPSA014	A Simple Model for Electromagnetic Field in RFQ Channel	rfq, electromagnetic-fields, real-time, software	244
	O.I. Drivotin, I.T. Dulatov St. Petersburg State University, St. Petersburg, Russia
	Numerical solution of the RFQ structure optimization problem requires a great amount of computation. Each consecutive step of the numerical optimization includes modification of geometry of the channel and computation of electromagnetic field for modified geometry. Therefore, a simple model describing the field in the channel is needed for the optimization. Such model is proposed in this report. It differs from the commonly used traditional model of the field, which can be applied when profiles of the vanes are described by the harmonic functions of the longitudinal coordinate. Our model is more general and can be applied for arbitrary profiles of the vanes.
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TUPSA015	Acceleration of Deuterons and Protons in Single RFQ Strucrure	rfq, ion, acceleration, proton	247
	A.D. Ovsyannikov, D.A. Ovsyannikov, Y.A. Svistunov Saint Petersburg State University, Saint Petersburg, Russia A.P. Durkin MRTI RAS, Moscow, Russia
	Some aspects of acceleration of protons and deuterons in single RFQ are considered. Usually vane voltage for protons must be two times less than vane voltage for deuterons. If space charge is significant vane voltage for protons can be too small to reach high efficiency of bunching and focusing of protons beam. It is shown that a rising of voltage up to nominal value for deuterons leads to increasing of capture and transmission for protons. Another problem is concerned with a choice of radial matching section parameters, which are optimal for both beams (proton and deuterons) simultaneously. Methods of optimization are discussed. Analysis of particles dynamics is illustrated by calculation's results.
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TUPSA020	Installation for the Research of Z-Pinch Plasma Initiated by the Electron Beam	electron, plasma, gun, luminosity	258
	A.A. Drozdovsky, A.V. Bogdanov, S.A. Drozdovsky, R. Gavrilin, A.V. Kantsyrev, V.A. Panyushkin, I. Roudskoy, S.M. Savin, V.V. Yanenko ITEP, Moscow, Russia P.V. Sasorov Keldysh Institute of Applied Mathematics, Moscow, Russia V.V. Yanenko MEPhI, Moscow, Russia
	For researches on plasma physics has been designed and constructed the electronic gun with the cold cathode on energy to 300 keV. The gun have the parameters: time width of pulses -100 ns, current amplitude - 100 A. The adiabatic plasma lens is developed for transportation and compression of the received electron beam. Results of researches are presented.
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TUPSA042	Software Complex "Dynpart" for the Calculation of Self-Consistent Beam Dynamics in Dielectric Wakefield Accelerating Structures	wakefield, electron, acceleration, software	307
	I.L. Sheinman, A.E. Yakushkin LETI, Saint-Petersburg, Russia
	Dielectric waveguide structures are a basis for development of new generation of accelerators on the basis of a wakefield method of the charged particle acceleration, beam manipulation, and also free electron lasers. A self-coordinated dynamics of relativistic particle beams in a single layer cylindrical waveguide with dielectric filling is investigated. The computer code is developed based on mathematical expressions for the analysis of the radial dynamics. The possibility of modeling interaction of different types of particles in a bunch is realized. Influence of both own wake fields and external fields of focusing and deflection systems on bunch dynamics are analyzed.
	Poster TUPSA042 [0.860 MB]
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WEPSB004	The Intelligent Object-oriented Interface in the Design Environment of The Charged Particles Relativistic Beams Transport Channels	quadrupole, 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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WEPSB005	On the Minimax Problem of Beam Dynamics Optimization	controls, rfq, acceleration, linac	360
	M.A. Mizintseva, D.A. Ovsyannikov St. Petersburg State University, St. Petersburg, Russia
	The problem of simultaneous optimization of the ensemble of trajectories and some selected trajectory arises in the research of the charged particle beam dynamics. The present work suggests the use of a smooth functional for the evaluation of the selected trajectories and a minimax functional for the evaluation of the dynamics of the beam of trajectories. A combination of those functionals is considered.
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WEPSB011	About Development System for the Analysis of Charged Particle Beam Dynamics	controls, acceleration, distributed, quadrupole	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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WEPSB015	On the Integro-Differential Equations for Dynamics of Interacting Charged Particles Modeling	simulation, electromagnetic-fields, plasma, controls	392
	D.A. Ovsyannikov St. Petersburg State University, St. Petersburg, Russia N.S. Edamenko Saint Petersburg State University, Saint Petersburg, Russia
	In this paper we investigate the integro-differential model for the dynamics of charged particles with smooth interaction for the analysis and optimization of intense charged particle beams motion in accelerating and focusing structures. Introduced mathematical models allows us to calculate the first variation of the different functionals characterizing the desired parameters of accelerators in analytical form. Thus mathematical model can be effectively used in the analysis and optimization of charged particles dynamics in accelerators.
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WEPSB018	Beam Dynamics Calculation of Electron Bunch Sequence Passing Through Dielectric	radiation, electron, wakefield, quadrupole	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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WEPSB023	Formation of a Given Distribution of the Beam in the Periodic Channel	controls, feedback, space-charge, distributed	411
	S.N. Andrianov St. Petersburg State University, St. Petersburg, Russia N.S. Edamenko Saint Petersburg State University, Saint Petersburg, Russia
	The article considers the problem of forming a predetermined distribution density of the beam (in the phase or configuration space) in a periodic channel. The proposed approach is based on a method of constructing a beam mapping in the form of a truncated series consisting from matrices up to necessary order of nonlinearities. Similar approach allows us to formulate the given task as an optimization problem for some special functionals, created from parameters of the accelerator. Some results of the testing tasks are demonstrated.
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WEPSB033	Focusing of Charged Particles by Magnetic Dipoles	dipole, induction, quadrupole, 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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WEPSB035	Model of the Optimal Parameters Choice for the Charged Particles Beam	controls, electron, hadron, hadrontherapy	437
	S.A. Nemnyugin, O.A. Malafeyev Saint Petersburg State University, Saint Petersburg, Russia
	Problem of the optimal parameters choice for the charged particles beam is considered. The beam is characterized by the set of control parameters and multiple parameters which characterize its quality. So multiple criteria of optimization should be taken into account. Among possible criteria of optimization following ones should be mentioned: energy, intensity, biological efficiency and so on. It is assumed that in general case choice of the control parameters which is optimal for all criteria is not possible. The problem is formulated as the conflict control problem. The case is considered when parameters which should be optimized forms the vector. Finding of the compromise solution is considered. The method and computing algorithms are proposed. Present work is further extension of . G. V. Alferov, O. A. Malafeyev, S. A. Nemnyugin. Charged Particles Beam Focusing with Uncontrollable Changing Parameters // 2014 2nd International Conference on Emission Electronics, Proceedings, 2014. P. 25-27.
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WEPSB049	Temperature Control System for Thermoradiotherapy Facilities	simulation, dipole, controls, experiment	474
	S.M. Polozov, A.M. Fadeev, S.M. Ivanov MEPhI, Moscow, Russia E.A. Perelstein JINR, Dubna, Moscow Region, Russia
	It is known, hyperthermia is widely used to improve the efficiency of cancer treatment. Local hyperthermia is a method where only tumor is heated, on the other hand healthy tissues are protected from overheating. It was proposed to use an array of eight independently phased dipoles operating on 100-150 MHz to focus the RF energy in deep-situated volume of 30-50 mm size. But the problem of non-invasive temperature measurement should to be solved for correct operation of the local thermoradiotherapy systems. Conventional invasive thermometry devices as thermocouples, thermistors or Bragg optical sensors can not be widely used because of serious risk of the cancer cells transport to healthy tissues. Radiothermometry or acoustic thermometry can not be used for tissues located deeper than 5-7 cm. As known electrodynamics characteristics of tissues depend on temperature. It was proposed to use this effect for active radiothermometry in local hyperthermia. Two opposite RF dipoles can be used as generator and receiver of pick-up signal. It was shown by simulations that such method can be used for thermometry of deep-situated tissues and have high resolution. Results of simulation will present in report.
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WEPSB064	Modifications of Electron Linear Accelerators Produced in NIIEFA for Sterilization	electron, gun, klystron, vacuum	505
	Yu. Zuev, A.P. Klinov, A.S. Krestianinov, O.L. Maslennikov, V.V. Terentyev NIIEFA, St. Petersburg, Russia
	The paper analyses a series of electron linear accelerators equipped with one and the same accelerating structure. The structure operates in the standing-wave mode at a frequency of 2856 MHz. The accelerators differ in type and duty cycle of RF generators, electron sources, beam extraction and scanning devices and in configuration and layout of their auxiliary equipment. These modifications can provide the beam energy of 8-10 MeV and beam power up to 10^-12 kW. Facilities with the accelerating structure have been used for electron beam sterilization of medical disposables and food processing over ten years.
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WEPSB073	Design Study of the Proton Linac for Radiopharmaceuticals Production	DTL, linac, cavity, rfq	524
	G. Kropachev, A.I. Balabin, T. Kulevoy, D.N. Selesnev, A. Sitnikov ITEP, Moscow, Russia T. Kulevoy MEPhI, Moscow, Russia
	The 8 MeV 200 MHz linac for acceleration of quasi cw 0.2 mA proton beam is under development at ITEP. The linac is designed for radiopharmaceuticals production which will be used in the Positron-Emission Tomography. The linac includes RFQ and DTL sections with 6D-beam matching between them. The DTL section has modular structure and consists of separated individually phased IH-cavities with beam focusing by permanent magnet quadrupoles located between the cavities. This DTL structure provides linac compactness and enables its tuning and commissioning cavity by cavity. Results of beam dynamic simulation and electrodynamics characteristics of linac cavities are presented.
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THPSC008	Magnetic Systems for Beam Transport at Extraction Channels of ILU Accelerators	electron, extraction, radiation, dipole	556
	V.V. Bezuglov, A.A. Bryazgin, B.L. Faktorovich, E.N. Kokin, V.E. Nekhaev, A.D. Panfilov, V.M. Radchenko, E.A. Shtarklev, V.O. Tkachenko, A. YU. Vlasov, L.A. Voronin BINP SB RAS, Novosibirsk, Russia
	This paper is devoted to magnetic systems for beam transport at extraction channels of electron industrial accelerators of the ILU type. The extraction systems meant for energy of the accelerated electrons up to 10 MeV and beam power up to 100 kW are described. The analysis of their work subject to the processes connected with the induced eddy currents in metal walls of beam scanning chambers is made; special attention is paid to forming of the dose field in a radiation zone. In paper the magnetic system for bending of the nonmonochromatic beams is offered to application. The essence of the described device consists in application of two identical magnetic mirrors in which distribution of magnetic field on depth is formed so that natural rise of magnetic field intensity on an entrance to a mirror is followed by decrease of this field under a certain law. In the issue of impact on charged particles of forces arising in cylindrical lenses of each mirror is possible to compensate angular divergence of strongly nonmonochromatic beams in gaps of magnetic mirrors and to receive after bending a beam with parameters close to phase characteristics of an input beam. The design procedure of such bending device and a general view of installation for experimental check of the offered bending system on electron beam are given in this paper.
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THPSC041	New Superconducting Linac Injector Project for Nuclotron-Nica: Current Results	linac, proton, acceleration, simulation	626
	S.M. Polozov, M. Gusarova, T. Kulevoy, M.V. Lalayan, A.V. Samoshin, S.E. Toporkov, V. Zvyagintsev MEPhI, Moscow, Russia M.A. Baturitski, S.A. Maksimenko INP BSU, Minsk, Belarus A.V. Butenko, A.O. Sidorin, G.V. Trubnikov JINR, Dubna, Moscow Region, Russia A.A. Marysheva, V.S. Petrakovsky, I.L. Pobol, A.I. Pokrovsky, D.A. Shparla, S.V. Yurevich Physical-Technical Institute of the National Academy of Sciences of Belarus, Minsk, Belarus V. Zvyagintsev TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
	The joint collaboration of JINR, NRNU MEPhI, INP BSU, PTI NASB, BSUIR and SPMRC NASB started in 2015 a new project on the development of superconducting cavities production and test technologies and new linac-injector design. This linac intend for the protons acceleration up to25 MeV (up to 50 MeV after upgrade) and light ions acceleration up to ~7.5 MeV/u for Nuclotron-NICA injection. Current status of linac general design and results of the beam dynamics simulation and SRF technology development are presented in this report.
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THPSC069	Measurement of the Ion Beam Profile with the D-Pace Wire Scanner	ion, vacuum, neutron, experiment	695
	E.O. Sokolova Budker INP & NSU, Novosibirsk, Russia D.A. Kasatov, Ya.A. Kolesnikov, A.M. Koshkarev, A.S. Kuznetsov, A.N. Makarov, I.M. Shchudlo, I.N. Sorokin, S.Yu. Taskaev BINP SB RAS, Novosibirsk, Russia
	Funding: The study was supported by grants from the Russian Science Foundation (Project no. 14-32-00006) and the Budker Institute of Nuclear Physics and the Novosibirsk State University. In The Budker Institute of Nuclear Physics the accelerator-based source of epithermal neutrons was invented and now operates to be used in the boron neutron capture therapy. For several reasons the real beam flow in the facility differs from the calculated one. To take into account this distinction it is necessary to provide continuous monitoring of the beam parameters. In order to optimize the facility operation the beam should be followed not only during the formation but also while an acceleration takes place and the proton beam is thrown on the lithium target as the proton current and energy influence on the neutron output. In this way it seems to be a significant issue to measure the current, profile and also the position of the ion beam in a low-energy part of the accelerator. This work represents the results of experiments with the D-Pace WS-30 Wire Scanner Probe, which was installed in the low-energy part of the accelerator. The experiments were carried out under various conditions to vary the position and focusing control via the system of magnetic correcting elements. To correctly interpret experimental data it was necessary to take into account physical phenomena which occur during an experiment. In this way the effects which take place when the probe interacts with the beam were thoroughly considered. The obtained results allowed to restore the ion beam profile, define its size and position.
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Paper

Title

Other Keywords

Page

TUPSA006

Development of RF Accelerator on Parallel-Coupled Structure - Trend in Accelerator Technique

cavity, electron, coupling, acceleration

219

Y.D. Chernousov
ICKC, Novosibirsk, Russia

Development of parallel-coupled accelerating structure (PCS), creation of RF linier accelerator based on PCS is new and rapidly developing field of accelerator technology. Compared with conventional accelerating structures with serial communication - the standard traveling and standing waves structures, the PCS has a lot of features and advantages. There are many problems in the development of RF linear accelerators: breakdowns at high power levels, the destruction of the structure due to overheating, the excitation of higher-order mode, the decline of field strength along the structure, transients, beam loading, beam focusing, multipactor, radiation accelerator cleanliness, etc. PCS - the best accelerating structure for solving these problems.

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TUPSA007

New Experimental Results on RF Accelerator with Parallel-Coupled Structure and RF Controlled Gun

injection, electron, gun, cavity

222

Y.D. Chernousov
ICKC, Novosibirsk, Russia
I.M. Ikryanov, I.V. Shebolaev
ICKC SB RAS, Novosibirsk, Russia

New data on the development and experimental investigation of the RF accelerator based on the 9-cavities parallel-coupled accelerating structure that is equipped with a high-frequency grid-controlled electron gun are presented. Accelerating structure, injection system and focusing system are improved. Previously observed second emission resonant discharge - multipactor is suppressed by increasing the field amplitude in the structure first cavity and using the protector. The parameters of the accelerated beam close to the design ones, i.e. electron energy up to 8 MeV, capture to the acceleration mode up to 100%, were received. Capture is provided by the RF electron focusing of the microwave field structure with usage of the magnetic focusing system based on permanent magnets and RF grid control in the electron gun.

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TUPSA009

Electron Beam Dynamics Calculation and Accelerating Structure Geometry Design in 10 MeV Hybrid Electron Linac

linac, electron, coupling, beam-loading

228

A.V. Bulanov, S.V. Matsievskiy, E.A. Savin, N.P. Sobenin
MEPhI, Moscow, Russia

Electron linear accelerators with an energy of 10 MeV are widely used for industrial purposes. This article presents the electron dynamic calculations and the design of linac with a standing wave (SW) buncher based on the biperiodic accelerating structure and a constant impedance backward traveling wave (BTW) accelerating section after it. In such accelerator, all unused RF power coming out from BTW section is used in SW section to improve the linac efficiency. Thus no RF load is needed. Also, a beam is experiencing an RF focusing in the SW buncher. Solenoid focusing field influence on the beam dynamics in the TW section was studied.

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TUPSA010

Electron Linear Accelerator with the Variable Energy from 6 to 11 MeV

electron, linac, gun, klystron

231

A.V. Bulanov, E.A. Savin, N.P. Sobenin
MEPhI, Moscow, Russia
A.V. Gryzlov
TORIY, Moscow, Russia

The standing wave accelerator with the variable energy from 6 to 11 MeV has been designed. Electron energy is controlled by the injected current. The buncher has been designed to provide capture above 70% for the all injected currents range. The possibility of using a permanent radially magnetized toroidal magnet for the beam focusing was studied.

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TUPSA013

Investigation of a Second Order Method of RFQ Channel Optimization

controls, rfq, acceleration, software

240

O.I. Drivotin
St. Petersburg State University, St. Petersburg, Russia
D.A. Starikov
Saint Petersburg State University, Saint Petersburg, Russia

This report is devoted to a numerical method of solution of the RFQ structure optimization problem. The problem is considered as a control theory problem. Control functions representing geometry of the electrodes and a quality functional describing the beam are introduced. To solve the problem numerically these control functions are parametrized. The presented method is based on the computation of the derivatives of the first and the second order of the quality functional on the parameters. Results of investigation of efficiency of the method relatively to a method including computation of the derivatives only of the first order are presented.

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TUPSA014

A Simple Model for Electromagnetic Field in RFQ Channel

rfq, electromagnetic-fields, real-time, software

244

O.I. Drivotin, I.T. Dulatov
St. Petersburg State University, St. Petersburg, Russia

Numerical solution of the RFQ structure optimization problem requires a great amount of computation. Each consecutive step of the numerical optimization includes modification of geometry of the channel and computation of electromagnetic field for modified geometry. Therefore, a simple model describing the field in the channel is needed for the optimization. Such model is proposed in this report. It differs from the commonly used traditional model of the field, which can be applied when profiles of the vanes are described by the harmonic functions of the longitudinal coordinate. Our model is more general and can be applied for arbitrary profiles of the vanes.

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TUPSA015

Acceleration of Deuterons and Protons in Single RFQ Strucrure

rfq, ion, acceleration, proton

247

A.D. Ovsyannikov, D.A. Ovsyannikov, Y.A. Svistunov
Saint Petersburg State University, Saint Petersburg, Russia
A.P. Durkin
MRTI RAS, Moscow, Russia

Some aspects of acceleration of protons and deuterons in single RFQ are considered. Usually vane voltage for protons must be two times less than vane voltage for deuterons. If space charge is significant vane voltage for protons can be too small to reach high efficiency of bunching and focusing of protons beam. It is shown that a rising of voltage up to nominal value for deuterons leads to increasing of capture and transmission for protons. Another problem is concerned with a choice of radial matching section parameters, which are optimal for both beams (proton and deuterons) simultaneously. Methods of optimization are discussed. Analysis of particles dynamics is illustrated by calculation's results.

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TUPSA020

Installation for the Research of Z-Pinch Plasma Initiated by the Electron Beam

electron, plasma, gun, luminosity

258

A.A. Drozdovsky, A.V. Bogdanov, S.A. Drozdovsky, R. Gavrilin, A.V. Kantsyrev, V.A. Panyushkin, I. Roudskoy, S.M. Savin, V.V. Yanenko
ITEP, Moscow, Russia
P.V. Sasorov
Keldysh Institute of Applied Mathematics, Moscow, Russia
V.V. Yanenko
MEPhI, Moscow, Russia

For researches on plasma physics has been designed and constructed the electronic gun with the cold cathode on energy to 300 keV. The gun have the parameters: time width of pulses -100 ns, current amplitude - 100 A. The adiabatic plasma lens is developed for transportation and compression of the received electron beam. Results of researches are presented.

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TUPSA042

Software Complex "Dynpart" for the Calculation of Self-Consistent Beam Dynamics in Dielectric Wakefield Accelerating Structures

wakefield, electron, acceleration, software

307

I.L. Sheinman, A.E. Yakushkin
LETI, Saint-Petersburg, Russia

Dielectric waveguide structures are a basis for development of new generation of accelerators on the basis of a wakefield method of the charged particle acceleration, beam manipulation, and also free electron lasers. A self-coordinated dynamics of relativistic particle beams in a single layer cylindrical waveguide with dielectric filling is investigated. The computer code is developed based on mathematical expressions for the analysis of the radial dynamics. The possibility of modeling interaction of different types of particles in a bunch is realized. Influence of both own wake fields and external fields of focusing and deflection systems on bunch dynamics are analyzed.

Poster TUPSA042 [0.860 MB]

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WEPSB004

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

quadrupole, 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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WEPSB005

On the Minimax Problem of Beam Dynamics Optimization

controls, rfq, acceleration, linac

360

M.A. Mizintseva, D.A. Ovsyannikov
St. Petersburg State University, St. Petersburg, Russia

The problem of simultaneous optimization of the ensemble of trajectories and some selected trajectory arises in the research of the charged particle beam dynamics. The present work suggests the use of a smooth functional for the evaluation of the selected trajectories and a minimax functional for the evaluation of the dynamics of the beam of trajectories. A combination of those functionals is considered.

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WEPSB011

About Development System for the Analysis of Charged Particle Beam Dynamics

controls, acceleration, distributed, quadrupole

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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WEPSB015

On the Integro-Differential Equations for Dynamics of Interacting Charged Particles Modeling

simulation, electromagnetic-fields, plasma, controls

392

D.A. Ovsyannikov
St. Petersburg State University, St. Petersburg, Russia
N.S. Edamenko
Saint Petersburg State University, Saint Petersburg, Russia

In this paper we investigate the integro-differential model for the dynamics of charged particles with smooth interaction for the analysis and optimization of intense charged particle beams motion in accelerating and focusing structures. Introduced mathematical models allows us to calculate the first variation of the different functionals characterizing the desired parameters of accelerators in analytical form. Thus mathematical model can be effectively used in the analysis and optimization of charged particles dynamics in accelerators.

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WEPSB018

Beam Dynamics Calculation of Electron Bunch Sequence Passing Through Dielectric

radiation, electron, wakefield, quadrupole

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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WEPSB023

Formation of a Given Distribution of the Beam in the Periodic Channel

controls, feedback, space-charge, distributed

411

S.N. Andrianov
St. Petersburg State University, St. Petersburg, Russia
N.S. Edamenko
Saint Petersburg State University, Saint Petersburg, Russia

The article considers the problem of forming a predetermined distribution density of the beam (in the phase or configuration space) in a periodic channel. The proposed approach is based on a method of constructing a beam mapping in the form of a truncated series consisting from matrices up to necessary order of nonlinearities. Similar approach allows us to formulate the given task as an optimization problem for some special functionals, created from parameters of the accelerator. Some results of the testing tasks are demonstrated.

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WEPSB033

Focusing of Charged Particles by Magnetic Dipoles

dipole, induction, quadrupole, 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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WEPSB035

Model of the Optimal Parameters Choice for the Charged Particles Beam

controls, electron, hadron, hadrontherapy

437

S.A. Nemnyugin, O.A. Malafeyev
Saint Petersburg State University, Saint Petersburg, Russia

Problem of the optimal parameters choice for the charged particles beam is considered. The beam is characterized by the set of control parameters and multiple parameters which characterize its quality. So multiple criteria of optimization should be taken into account. Among possible criteria of optimization following ones should be mentioned: energy, intensity, biological efficiency and so on. It is assumed that in general case choice of the control parameters which is optimal for all criteria is not possible. The problem is formulated as the conflict control problem. The case is considered when parameters which should be optimized forms the vector. Finding of the compromise solution is considered. The method and computing algorithms are proposed. Present work is further extension of *.
* G. V. Alferov, O. A. Malafeyev, S. A. Nemnyugin. Charged Particles Beam Focusing with Uncontrollable Changing Parameters // 2014 2nd International Conference on Emission Electronics, Proceedings, 2014. P. 25-27.

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WEPSB049

Temperature Control System for Thermoradiotherapy Facilities

simulation, dipole, controls, experiment

474

S.M. Polozov, A.M. Fadeev, S.M. Ivanov
MEPhI, Moscow, Russia
E.A. Perelstein
JINR, Dubna, Moscow Region, Russia

It is known, hyperthermia is widely used to improve the efficiency of cancer treatment. Local hyperthermia is a method where only tumor is heated, on the other hand healthy tissues are protected from overheating. It was proposed to use an array of eight independently phased dipoles operating on 100-150 MHz to focus the RF energy in deep-situated volume of 30-50 mm size. But the problem of non-invasive temperature measurement should to be solved for correct operation of the local thermoradiotherapy systems. Conventional invasive thermometry devices as thermocouples, thermistors or Bragg optical sensors can not be widely used because of serious risk of the cancer cells transport to healthy tissues. Radiothermometry or acoustic thermometry can not be used for tissues located deeper than 5-7 cm. As known electrodynamics characteristics of tissues depend on temperature. It was proposed to use this effect for active radiothermometry in local hyperthermia. Two opposite RF dipoles can be used as generator and receiver of pick-up signal. It was shown by simulations that such method can be used for thermometry of deep-situated tissues and have high resolution. Results of simulation will present in report.

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WEPSB064

Modifications of Electron Linear Accelerators Produced in NIIEFA for Sterilization

electron, gun, klystron, vacuum

505

Yu. Zuev, A.P. Klinov, A.S. Krestianinov, O.L. Maslennikov, V.V. Terentyev
NIIEFA, St. Petersburg, Russia

The paper analyses a series of electron linear accelerators equipped with one and the same accelerating structure. The structure operates in the standing-wave mode at a frequency of 2856 MHz. The accelerators differ in type and duty cycle of RF generators, electron sources, beam extraction and scanning devices and in configuration and layout of their auxiliary equipment. These modifications can provide the beam energy of 8-10 MeV and beam power up to 10^-12 kW. Facilities with the accelerating structure have been used for electron beam sterilization of medical disposables and food processing over ten years.

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WEPSB073

Design Study of the Proton Linac for Radiopharmaceuticals Production

DTL, linac, cavity, rfq

524

G. Kropachev, A.I. Balabin, T. Kulevoy, D.N. Selesnev, A. Sitnikov
ITEP, Moscow, Russia
T. Kulevoy
MEPhI, Moscow, Russia

The 8 MeV 200 MHz linac for acceleration of quasi cw 0.2 mA proton beam is under development at ITEP. The linac is designed for radiopharmaceuticals production which will be used in the Positron-Emission Tomography. The linac includes RFQ and DTL sections with 6D-beam matching between them. The DTL section has modular structure and consists of separated individually phased IH-cavities with beam focusing by permanent magnet quadrupoles located between the cavities. This DTL structure provides linac compactness and enables its tuning and commissioning cavity by cavity. Results of beam dynamic simulation and electrodynamics characteristics of linac cavities are presented.

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THPSC008

Magnetic Systems for Beam Transport at Extraction Channels of ILU Accelerators

electron, extraction, radiation, dipole

556

V.V. Bezuglov, A.A. Bryazgin, B.L. Faktorovich, E.N. Kokin, V.E. Nekhaev, A.D. Panfilov, V.M. Radchenko, E.A. Shtarklev, V.O. Tkachenko, A. YU. Vlasov, L.A. Voronin
BINP SB RAS, Novosibirsk, Russia

This paper is devoted to magnetic systems for beam transport at extraction channels of electron industrial accelerators of the ILU type. The extraction systems meant for energy of the accelerated electrons up to 10 MeV and beam power up to 100 kW are described. The analysis of their work subject to the processes connected with the induced eddy currents in metal walls of beam scanning chambers is made; special attention is paid to forming of the dose field in a radiation zone. In paper the magnetic system for bending of the nonmonochromatic beams is offered to application. The essence of the described device consists in application of two identical magnetic mirrors in which distribution of magnetic field on depth is formed so that natural rise of magnetic field intensity on an entrance to a mirror is followed by decrease of this field under a certain law. In the issue of impact on charged particles of forces arising in cylindrical lenses of each mirror is possible to compensate angular divergence of strongly nonmonochromatic beams in gaps of magnetic mirrors and to receive after bending a beam with parameters close to phase characteristics of an input beam. The design procedure of such bending device and a general view of installation for experimental check of the offered bending system on electron beam are given in this paper.

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THPSC041

New Superconducting Linac Injector Project for Nuclotron-Nica: Current Results

linac, proton, acceleration, simulation

626

S.M. Polozov, M. Gusarova, T. Kulevoy, M.V. Lalayan, A.V. Samoshin, S.E. Toporkov, V. Zvyagintsev
MEPhI, Moscow, Russia
M.A. Baturitski, S.A. Maksimenko
INP BSU, Minsk, Belarus
A.V. Butenko, A.O. Sidorin, G.V. Trubnikov
JINR, Dubna, Moscow Region, Russia
A.A. Marysheva, V.S. Petrakovsky, I.L. Pobol, A.I. Pokrovsky, D.A. Shparla, S.V. Yurevich
Physical-Technical Institute of the National Academy of Sciences of Belarus, Minsk, Belarus
V. Zvyagintsev
TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada

The joint collaboration of JINR, NRNU MEPhI, INP BSU, PTI NASB, BSUIR and SPMRC NASB started in 2015 a new project on the development of superconducting cavities production and test technologies and new linac-injector design. This linac intend for the protons acceleration up to25 MeV (up to 50 MeV after upgrade) and light ions acceleration up to ~7.5 MeV/u for Nuclotron-NICA injection. Current status of linac general design and results of the beam dynamics simulation and SRF technology development are presented in this report.

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THPSC069

Measurement of the Ion Beam Profile with the D-Pace Wire Scanner

ion, vacuum, neutron, experiment

695

E.O. Sokolova
Budker INP & NSU, Novosibirsk, Russia
D.A. Kasatov, Ya.A. Kolesnikov, A.M. Koshkarev, A.S. Kuznetsov, A.N. Makarov, I.M. Shchudlo, I.N. Sorokin, S.Yu. Taskaev
BINP SB RAS, Novosibirsk, Russia

Funding: The study was supported by grants from the Russian Science Foundation (Project no. 14-32-00006) and the Budker Institute of Nuclear Physics and the Novosibirsk State University.
In The Budker Institute of Nuclear Physics the accelerator-based source of epithermal neutrons was invented and now operates to be used in the boron neutron capture therapy. For several reasons the real beam flow in the facility differs from the calculated one. To take into account this distinction it is necessary to provide continuous monitoring of the beam parameters. In order to optimize the facility operation the beam should be followed not only during the formation but also while an acceleration takes place and the proton beam is thrown on the lithium target as the proton current and energy influence on the neutron output. In this way it seems to be a significant issue to measure the current, profile and also the position of the ion beam in a low-energy part of the accelerator. This work represents the results of experiments with the D-Pace WS-30 Wire Scanner Probe, which was installed in the low-energy part of the accelerator. The experiments were carried out under various conditions to vary the position and focusing control via the system of magnetic correcting elements. To correctly interpret experimental data it was necessary to take into account physical phenomena which occur during an experiment. In this way the effects which take place when the probe interacts with the beam were thoroughly considered. The obtained results allowed to restore the ion beam profile, define its size and position.

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