RuPAC2014 - List of Authors (Lalayan, M.V.)

Paper	Title	Page
WEPSB04	Field Optimization Technique of the Multigap H-mode Resonators	162
	S.E. Toporkov, A.B. Buleiko, M.V. Lalayan MEPhI, Moscow, Russia
	Optimization of the H-mode resonators requires uniform accelerating field distribution on its axes. To realize this task pylons with the holes on its end walls are used in many cases. During applying this technique in case of cavities with low number of periods it was mentioned that the best value of the field flatness was obtained in case of zero gap between end walls of the resonator and the pylon. It means that each pylon has got the electrical contact with one of the end walls of the resonator. For such cavity geometry magnetic field distribution differs from the classical H – resonator: it transforms in one common magnetic flux like in split-coaxial cavities. The analysis of such structures was performed for two types of H-mode resonators: Cross bar H-mode (CH) resonators with working frequency 324MHz and Interdigital H-mode (IH) resonators with working frequency 162MHz. All types of resonators work on the pi-mode and have 9 accelerating gaps. The main stages of E-field flatness optimization inside CH⁻ and IH⁻ cavities are presented at this paper.

WEPSB07	MultP-M Code Geometry Import Module Performance Optimization	169
	M. Gusarova, S. Khudyakov, M.V. Lalayan MEPhI, Moscow, Russia
	The new possibilities of three-dimensional modeling program multipactor MultP-M are presented. On an example, consider an increase in the speed and accuracy of the calculation using a new algorithm for calculating the use of loading geometry format STL.

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.

THPSC38	Development of the Software for the Accelerating Fields in Linear Structures Measurement	407
	E.A. Savin, M.V. Lalayan, A.Yu. Smirnov MEPhI, Moscow, Russia A.A. Zavadtsev Nano, Moscow, Russia
	The software which allows controlling the whole installation to measure electric fields in the linear structures has been developed. The installation consists of linear structure, step motor drive, motor controller, a probe which moves on the string throw the structure to perturb the field to use the perturbation measuring method, network vector analyzer and the PC. He software interface is user-friendly, user only needs to write down the length of the structure, a desired step of the probe and push the start button. As a result user can obtain the picture of electric field on the structure axis. It is possible to choose between two measuring methods: by S11 of by S21.

Paper

Title

Page

Field Optimization Technique of the Multigap H-mode Resonators

162

S.E. Toporkov, A.B. Buleiko, M.V. Lalayan
MEPhI, Moscow, Russia

Optimization of the H-mode resonators requires uniform accelerating field distribution on its axes. To realize this task pylons with the holes on its end walls are used in many cases. During applying this technique in case of cavities with low number of periods it was mentioned that the best value of the field flatness was obtained in case of zero gap between end walls of the resonator and the pylon. It means that each pylon has got the electrical contact with one of the end walls of the resonator. For such cavity geometry magnetic field distribution differs from the classical H – resonator: it transforms in one common magnetic flux like in split-coaxial cavities. The analysis of such structures was performed for two types of H-mode resonators: Cross bar H-mode (CH) resonators with working frequency 324MHz and Interdigital H-mode (IH) resonators with working frequency 162MHz. All types of resonators work on the pi-mode and have 9 accelerating gaps. The main stages of E-field flatness optimization inside CH⁻ and IH⁻ cavities are presented at this paper.

WEPSB07

MultP-M Code Geometry Import Module Performance Optimization

169

M. Gusarova, S. Khudyakov, M.V. Lalayan
MEPhI, Moscow, Russia

The new possibilities of three-dimensional modeling program multipactor MultP-M are presented. On an example, consider an increase in the speed and accuracy of the calculation using a new algorithm for calculating the use of loading geometry format STL.

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.

THPSC38

Development of the Software for the Accelerating Fields in Linear Structures Measurement

407

E.A. Savin, M.V. Lalayan, A.Yu. Smirnov
MEPhI, Moscow, Russia
A.A. Zavadtsev
Nano, Moscow, Russia

The software which allows controlling the whole installation to measure electric fields in the linear structures has been developed. The installation consists of linear structure, step motor drive, motor controller, a probe which moves on the string throw the structure to perturb the field to use the perturbation measuring method, network vector analyzer and the PC. He software interface is user-friendly, user only needs to write down the length of the structure, a desired step of the probe and push the start button. As a result user can obtain the picture of electric field on the structure axis. It is possible to choose between two measuring methods: by S11 of by S21.