RuPAC2014 - List of Authors (Polozov, S.M.)

Paper	Title	Page
TUPSA12	The User Friendly Interface for BEAMDULAC-RFQ Code	60
	S.M. Polozov, P.O. Larin MEPhI, Moscow, Russia
	The BEAMDULAC* beam dynamics simulation code is under development at MEPhI Department of Electrophysical Facilities since 1999. Such code includes versions for beam dynamics simulation in a number of accelerating structures as RFQ, DTL, APF, transport channels, ets. The motion equation for each particle is solved selfconsistently in the external fields and the inter-particle Coulomb field simultaneously. The BEAMDULAC code utilizes the cloud-in-cell (CIC) method for accurate treatment of the space charge effects. The external field can be represented analytically, as a series or on the grid. The absence of user friendly interface was the main disadvantage of the code. Last year such interface was developed and will present in the report. * S.M. Polozov. Problems of Atomic Science and Technology. Series: Nuclear Physics Investigations, 3 (79), 2012, p. 131-136.

TUPSA20	Output Energy Variation in the SC Linac for the Proton Radiotherapy	80
	I.A. Ashanin, S.M. Polozov, A.V. Samoshin MEPhI, Moscow, Russia
	Current success of the superconducting linear accelerators based on independently phased SC cavities gives a seriously reason to consider such structure in proton radiotherapy. Superconductivity allow to solve at once some problems concerned with a low rate of energy gain, high length, higher capacity losses and higher cost of the proton linear accelerator subsequently. One of the traditional aims of such facilities is receiving of the beam energy about 240 MeV with possibility of fluently regulation in range from 150 to 240 MeV that responds to irradiate the tumors located at different depth. The possibility of beam energy variation by means of RF field phase in last resonators and number of the resonator turn-off becomes the major advantage of the proton SC linac. The optimal choice of accelerator parameters and the beam dynamics simulation results with using BEAMDULAC-SCL code will presented. Methods of the output energy variation with beam quality preservation in the proton SC linac will discussed. A.V. Samoshin. Proc. of LINAC2012, Tel-Aviv, Israel, TUPB069, p. 630 - 632

WEPSB06	The Optimization of the Buncher at 145.2 MHz to Reduce Multipactor Effect	166
	M. Gusarova, T. Kulevoy, I.I. Petrushina, A.S. Plastun, S.M. Polozov MEPhI, Moscow, Russia T. Kulevoy, A.S. Plastun ITEP, Moscow, Russia
	The results of the optimization of the cavity of the single gap buncher at 145.2 MHz to reduce multipacting effect are presented. Resonant voltages, impact energies and corresponding particle trajectories are obtained. The variants of design to reduce multipacting effect are considered.

WEPSB35	Thermal Simulations of the Biperiodical Accelerating Structure with the Operating Frequency 27 GHz	237
	Yu.D. Kliuchevskaia, S.M. Polozov MEPhI, Moscow, Russia
	Biperiodical accelerating structure (BAS) represents an accelerating structure based on disk loaded waveguide (DLW) with π/2 operation mode. The 1 cm band structure will have very compact transverse size. Such characteristics give it perspective to use in medical accelerators. The results of beam dynamics simulation and electrodynamics study was discussed early. It will important to study the BAS electrodynamics taking into account thermal processes in structure and to design the cooling system. It is important because of the high pulse RF power (about 1.5 MW) necessary for the beam acceleration. The simulation results which are defined using CST code will presented in report. Calculation and determination of the thermolysis coefficient depending on speed, temperature and the water flow direction will make.

WEPSB36	A prototype of a Phased Array for Deep Thermoradiotherapy	240
	A.M. Fadeev, A.A. Blinnikov, S.M. Ivanov, S.M. Polozov MEPhI, Moscow, Russia
	It is proven that hyperthermia increases radiation and chemotherapy efficiency. In oncology, the generation of a higher temperature at a tumor-involved region of the body is called hyperthermia. The thermoradiotherapy is widely and effective uses. A phased array of eight dipoles for the hyperthermia treatment of deep-seated tumors is proposed earlier. The power and phase coherently delivered to the radiating elements can be varied, so that the electromagnetic field is increased at the tumor location and decreased in the normal tissues. The prototype of the phased array of two dipoles and the RF power scheme are presented and results of experiments are discussed. Measured and simulated temperature distributions along the line connecting two dipoles are discussed in this paper.

THPSC03	Study of Superconducting Accelerating Structures for Megawatt Proton Driver Linac	318
	S.M. Polozov, K.A. Aliev, A.M. Fadeev, M. Gusarova, T. Kulevoy, M.V. Lalayan, N.P. Sobenin, O. Verjbitskiy MEPhI, Moscow, Russia
	Funding: This project was supported by the Ministry of Science and Education of Russia under contract No. 14.516.11.0084 The preliminary design of megawatt level proton accelerator-driver is carrying out by collaboration between Russian scientific centers MEPhI, ITEP, Kurchatov Institute. This project was supported in 2013 by the Ministry of Science and Education of Russia. The linac general layout includes SC Spoke-cavities at middle energy range and elliptical cavity at high energy one. The usage of QWR and/or HWR at 10-30 MeV was also discussed. Due to electrodynamics models of all structures types were designed and the electrodynamics characteristics were studied. QWR, HWQ and Spoke-cavities were proposed to operate on 324 MHz and elliptical cavities on 972 MHz. The main electrodynamics simulation results will present in report. The multipactor study results will also discussed.

THPSC04	Study of Normal Conducting Accelerating Structures for Megawatt Proton Driver Linac	321
	S.M. Polozov, A.E. Aksentyev, A.A. Kalashnikova, T. Kulevoy, M.V. Lalayan, S.E. Toporkov MEPhI, Moscow, Russia
	Funding: This project was supported by the Ministry of Science and Education of Russia under contract No. 14.516.11.0084 The preliminary design of megawatt level proton accelerator-driver is carrying out by collaboration between Russian scientific centers MEPhI, ITEP, Kurchatov Institute. This project was supported in 2013 by the Ministry of Science and Education of Russia. The linac general layout includes RFQ section and section(s) with radiofrequency focusing. The different types of RF focusing were studied due to this project: RF crossed lenses, modified electrodes RFQ, axi-symmetrical RF focusing. All such focusing can be realized by IH-type cavities. The design of segmented vane RFQ (SVRFQ) with coupling windows and IH⁻ and CH-type normal conducting cavities will discuss in the report. All cavities operate on 162 MHz. The main electrodynamics simulation results will present.

THPSC05	Study of Possibility of 600-1000 MeV and 1 MW Proton Driver Linac Development in Russia	324
	S.M. Polozov, A.E. Aksentyev, K.A. Aliev, I.A. Ashanin, Y.A. Bashmakov, A.A. Blinnikov, T.V. Bondarenko, A.N. Didenko, M.S. Dmitriyev, V.V. Dmitriyeva, V.S. Dyubkov, A.M. Fadeev, A. Fertman, M. Gusarova, A.A. Kalashnikova, V.I. Kaminsky, E. Khabibullina, Yu.D. Kliuchevskaia, A.D. Kolyaskin, T. Kulevoy, M.V. Lalayan, S.V. Matsievskiy, V.I. Rashchikov, A.V. Samoshin, E.A. Savin, Ya.V. Shashkov, A.Yu. Smirnov, N.P. Sobenin, S.E. Toporkov, O. Verjbitskiy, A.V. Ziiatdinova, V. Zvyagintsev MEPhI, Moscow, Russia P.N. Alekseev, V.A. Nevinnitsa NRC, Moscow, Russia V.F. Batyaev, G. Kropachev, D.A. Liakin, S.V. Rogozhkin, Y.E. Titarenko ITEP, Moscow, Russia S. Stark INFN/LNL, Legnaro (PD), Italy
	Funding: This project was supported by the Ministry of Science and Education of Russia under contract No. 14.516.11.0084 Alternative nuclear energetic's technologies as fast reactors and accelerating driven systems (ADS) are necessary to solve a number of problems as U-238 or thorium fuel reactor and nuclear wastes transmutation. ADS subcritical system should consist of megawatt-power proton accelerator, neutron producing target and breeder. A number of ADS projects are under development in EU, Japan, USA, China, S.Korea at present. Superconducting linacs or their complexes with high energy storage synchrotron are under design in main projects as a megawatt power proton beam driver. In Russian Federation the complex design for accelerator-driver was carried down more than ten years ago. The new approach to the ADS complex is now under development in framework of the project carried out by collaboration between Russian scientific centers MEPhI, ITEP, Kurchatov Institute. This project was supported in 2013 by the Ministry of Science and Education of Russia. A brief results observation for accelerator part of the project is presented in report. It includes accelerator-driver general layout, beam dynamics simulation, electrodynamics simulations of accelerating cavities and analysis of technological background in Russia.

Paper

Title

Page

The User Friendly Interface for BEAMDULAC-RFQ Code

60

S.M. Polozov, P.O. Larin
MEPhI, Moscow, Russia

The BEAMDULAC* beam dynamics simulation code is under development at MEPhI Department of Electrophysical Facilities since 1999. Such code includes versions for beam dynamics simulation in a number of accelerating structures as RFQ, DTL, APF, transport channels, ets. The motion equation for each particle is solved selfconsistently in the external fields and the inter-particle Coulomb field simultaneously. The BEAMDULAC code utilizes the cloud-in-cell (CIC) method for accurate treatment of the space charge effects. The external field can be represented analytically, as a series or on the grid. The absence of user friendly interface was the main disadvantage of the code. Last year such interface was developed and will present in the report.
* S.M. Polozov. Problems of Atomic Science and Technology. Series: Nuclear Physics Investigations, 3 (79), 2012, p. 131-136.

TUPSA20

Output Energy Variation in the SC Linac for the Proton Radiotherapy

80

I.A. Ashanin, S.M. Polozov, A.V. Samoshin
MEPhI, Moscow, Russia

Current success of the superconducting linear accelerators based on independently phased SC cavities gives a seriously reason to consider such structure in proton radiotherapy. Superconductivity allow to solve at once some problems concerned with a low rate of energy gain, high length, higher capacity losses and higher cost of the proton linear accelerator subsequently. One of the traditional aims of such facilities is receiving of the beam energy about 240 MeV with possibility of fluently regulation in range from 150 to 240 MeV that responds to irradiate the tumors located at different depth. The possibility of beam energy variation by means of RF field phase in last resonators and number of the resonator turn-off becomes the major advantage of the proton SC linac. The optimal choice of accelerator parameters and the beam dynamics simulation results with using BEAMDULAC-SCL code will presented*. Methods of the output energy variation with beam quality preservation in the proton SC linac will discussed.
* A.V. Samoshin. Proc. of LINAC2012, Tel-Aviv, Israel, TUPB069, p. 630 - 632

WEPSB06

The Optimization of the Buncher at 145.2 MHz to Reduce Multipactor Effect

166

M. Gusarova, T. Kulevoy, I.I. Petrushina, A.S. Plastun, S.M. Polozov
MEPhI, Moscow, Russia
T. Kulevoy, A.S. Plastun
ITEP, Moscow, Russia

The results of the optimization of the cavity of the single gap buncher at 145.2 MHz to reduce multipacting effect are presented. Resonant voltages, impact energies and corresponding particle trajectories are obtained. The variants of design to reduce multipacting effect are considered.

WEPSB35

Thermal Simulations of the Biperiodical Accelerating Structure with the Operating Frequency 27 GHz

237

Yu.D. Kliuchevskaia, S.M. Polozov
MEPhI, Moscow, Russia

Biperiodical accelerating structure (BAS) represents an accelerating structure based on disk loaded waveguide (DLW) with π/2 operation mode. The 1 cm band structure will have very compact transverse size. Such characteristics give it perspective to use in medical accelerators. The results of beam dynamics simulation and electrodynamics study was discussed early. It will important to study the BAS electrodynamics taking into account thermal processes in structure and to design the cooling system. It is important because of the high pulse RF power (about 1.5 MW) necessary for the beam acceleration. The simulation results which are defined using CST code will presented in report. Calculation and determination of the thermolysis coefficient depending on speed, temperature and the water flow direction will make.

WEPSB36

A prototype of a Phased Array for Deep Thermoradiotherapy

240

A.M. Fadeev, A.A. Blinnikov, S.M. Ivanov, S.M. Polozov
MEPhI, Moscow, Russia

It is proven that hyperthermia increases radiation and chemotherapy efficiency. In oncology, the generation of a higher temperature at a tumor-involved region of the body is called hyperthermia. The thermoradiotherapy is widely and effective uses. A phased array of eight dipoles for the hyperthermia treatment of deep-seated tumors is proposed earlier. The power and phase coherently delivered to the radiating elements can be varied, so that the electromagnetic field is increased at the tumor location and decreased in the normal tissues. The prototype of the phased array of two dipoles and the RF power scheme are presented and results of experiments are discussed. Measured and simulated temperature distributions along the line connecting two dipoles are discussed in this paper.

THPSC03

Study of Superconducting Accelerating Structures for Megawatt Proton Driver Linac

318

S.M. Polozov, K.A. Aliev, A.M. Fadeev, M. Gusarova, T. Kulevoy, M.V. Lalayan, N.P. Sobenin, O. Verjbitskiy
MEPhI, Moscow, Russia

Funding: This project was supported by the Ministry of Science and Education of Russia under contract No. 14.516.11.0084
The preliminary design of megawatt level proton accelerator-driver is carrying out by collaboration between Russian scientific centers MEPhI, ITEP, Kurchatov Institute. This project was supported in 2013 by the Ministry of Science and Education of Russia. The linac general layout includes SC Spoke-cavities at middle energy range and elliptical cavity at high energy one. The usage of QWR and/or HWR at 10-30 MeV was also discussed. Due to electrodynamics models of all structures types were designed and the electrodynamics characteristics were studied. QWR, HWQ and Spoke-cavities were proposed to operate on 324 MHz and elliptical cavities on 972 MHz. The main electrodynamics simulation results will present in report. The multipactor study results will also discussed.

THPSC04

Study of Normal Conducting Accelerating Structures for Megawatt Proton Driver Linac

321

S.M. Polozov, A.E. Aksentyev, A.A. Kalashnikova, T. Kulevoy, M.V. Lalayan, S.E. Toporkov
MEPhI, Moscow, Russia

Funding: This project was supported by the Ministry of Science and Education of Russia under contract No. 14.516.11.0084
The preliminary design of megawatt level proton accelerator-driver is carrying out by collaboration between Russian scientific centers MEPhI, ITEP, Kurchatov Institute. This project was supported in 2013 by the Ministry of Science and Education of Russia. The linac general layout includes RFQ section and section(s) with radiofrequency focusing. The different types of RF focusing were studied due to this project: RF crossed lenses, modified electrodes RFQ, axi-symmetrical RF focusing. All such focusing can be realized by IH-type cavities. The design of segmented vane RFQ (SVRFQ) with coupling windows and IH⁻ and CH-type normal conducting cavities will discuss in the report. All cavities operate on 162 MHz. The main electrodynamics simulation results will present.

THPSC05

Study of Possibility of 600-1000 MeV and 1 MW Proton Driver Linac Development in Russia

324

S.M. Polozov, A.E. Aksentyev, K.A. Aliev, I.A. Ashanin, Y.A. Bashmakov, A.A. Blinnikov, T.V. Bondarenko, A.N. Didenko, M.S. Dmitriyev, V.V. Dmitriyeva, V.S. Dyubkov, A.M. Fadeev, A. Fertman, M. Gusarova, A.A. Kalashnikova, V.I. Kaminsky, E. Khabibullina, Yu.D. Kliuchevskaia, A.D. Kolyaskin, T. Kulevoy, M.V. Lalayan, S.V. Matsievskiy, V.I. Rashchikov, A.V. Samoshin, E.A. Savin, Ya.V. Shashkov, A.Yu. Smirnov, N.P. Sobenin, S.E. Toporkov, O. Verjbitskiy, A.V. Ziiatdinova, V. Zvyagintsev
MEPhI, Moscow, Russia
P.N. Alekseev, V.A. Nevinnitsa
NRC, Moscow, Russia
V.F. Batyaev, G. Kropachev, D.A. Liakin, S.V. Rogozhkin, Y.E. Titarenko
ITEP, Moscow, Russia
S. Stark
INFN/LNL, Legnaro (PD), Italy

Funding: This project was supported by the Ministry of Science and Education of Russia under contract No. 14.516.11.0084
Alternative nuclear energetic's technologies as fast reactors and accelerating driven systems (ADS) are necessary to solve a number of problems as U-238 or thorium fuel reactor and nuclear wastes transmutation. ADS subcritical system should consist of megawatt-power proton accelerator, neutron producing target and breeder. A number of ADS projects are under development in EU, Japan, USA, China, S.Korea at present. Superconducting linacs or their complexes with high energy storage synchrotron are under design in main projects as a megawatt power proton beam driver. In Russian Federation the complex design for accelerator-driver was carried down more than ten years ago. The new approach to the ADS complex is now under development in framework of the project carried out by collaboration between Russian scientific centers MEPhI, ITEP, Kurchatov Institute. This project was supported in 2013 by the Ministry of Science and Education of Russia. A brief results observation for accelerator part of the project is presented in report. It includes accelerator-driver general layout, beam dynamics simulation, electrodynamics simulations of accelerating cavities and analysis of technological background in Russia.