RuPAC2014 - List of Keywords (coupling)

Paper	Title	Other Keywords	Page
TUPSA04	Operating Frequency and Accelerating Structure Geometry Chose for the Travelling Wave Compact Electron Linear Accelerator	impedance, electron, linac	42
	E.A. Savin, I.D. Sokolov MEPhI, Moscow, Russia
	For the compact electron linear accelerating structure based on the hybrid scheme which consists from SW biperiodic structure buncher and TW DLS with magnetic couple TW accelerating part, the best option for the operating frequency and cells geometry has been chosen. Comparative calculations for the DLS cells with magnetic couple and without it, on the different operating frequencies and with the different couple coefficient were carried out. The best option will be manufactured, measured and used in the accelerator structure.

WEPSB08	Multi-beam Generator Cavity for the Proton Linear Accelerator Feeding System on 991 MHz Frequency Geometry Optimization	cavity, impedance, proton, electron	171
	E.A. Savin, S.V. Matsievskiy, N.P. Sobenin MEPhI, Moscow, Russia A.A. Zavadtsev Nano, Moscow, Russia
	For the proton linear accelerator feeding system 800 kW input power value is required. The system consists from pillbox cavity with six beam tubes connected to the rectangular waveguide as a power output system is designed. In case of using high voltage gun with modulated six-bunch injection, this system allows to transform the energy of electron bunches which flies throw beam tubes to accelerating section feeding power. Different types of the structure geometry were calculated. The whole structure consists both from generator cavity and accelerating structure has been designed.

WEPSB13	Oversized Interference Switches of Active Microwave Pulse Compressors	cavity, extraction, operation, plasma	183
	V.S. Igumnov, S.N. Artemenko, V.A. Avgustinovich, S.A. Gorev, V.L. Kaminski, S.A. Novikov, Yu.G. Yushkov TPU, Tomsk, Russia
	Funding: "Science" state order of the Russian Ministry of Education and Science. Results of simulation and experimental study of two types of the oversized interference switches are presented. The switch of the first type was developed on basis of the simulation of the oversized rectangular waveguide H-tee with the H01 operation mode. Conditions of effective operation of the first type switch as an energy extraction element of active microwave pulse compressors are determined. The output pulse power of 2.8 MW and pulse width of 3.5 ns with the corresponding amplification factor of 17.5 dB for were obtained in the X-band microwave pulse compressor prototype containing the storage cavity made of WR-284 waveguide and the switch made of the waveguide with the cross section area of 58×25 mm2. The results of experimental study of the oversized X-band interference switch of the second type with the synchronous energy extraction through a compact packet of common single mode switches incorporating the five identical waveguide tees are presented as well. Possibility of full synchronization of the switch packet is proved and the conditions of such synchronization are determined. Permissible quantity of the switches in a packet unit is estimated. The output pulse power of 0.8 MW, pulse width of 3.2 ns at the power gain of 12 dB and the pulse power of 2.2 MW, pulse width of 3.5 ns at the power gain of 16.5 dB were obtained when the energy extraction from the five different single mode resonant cavities and an oversized cavity respectively was synchronous.

WEPSB35	Thermal Simulations of the Biperiodical Accelerating Structure with the Operating Frequency 27 GHz	simulation, linac, electron, medical-accelerators	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.

THX02	Experience in Research, Development, Construction and Commissioning of Normally Conducting Accelerating Structures	linac, HOM, simulation, cavity	278
	V.V. Paramonov, L.V. Kravchuk RAS/INR, Moscow, Russia
	The experience and results of research, development, construction and start of normally conducting accelerating structures for high intensity hadron linear accelerators at medium and high energii is summarized Created methods and obtained results provided construction and start of operation of accelerating system in INR H⁻ linac with designed energy 600 MeV. The research results allow generalize the properties of high energy structures and develop methods and criteria for improvements, with were realized in the development and commissioning of accelerating structures in another foreign laboratories. Basing on research results, the high energy accelerating structure, which surpasses analogues in the total list of parameters, is proposed and approved.
	Slides THX02 [1.259 MB]

THPSC04	Study of Normal Conducting Accelerating Structures for Megawatt Proton Driver Linac	rfq, linac, cavity, Windows	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.

Paper

Title

Other Keywords

Page

Operating Frequency and Accelerating Structure Geometry Chose for the Travelling Wave Compact Electron Linear Accelerator

impedance, electron, linac

42

E.A. Savin, I.D. Sokolov
MEPhI, Moscow, Russia

For the compact electron linear accelerating structure based on the hybrid scheme which consists from SW biperiodic structure buncher and TW DLS with magnetic couple TW accelerating part, the best option for the operating frequency and cells geometry has been chosen. Comparative calculations for the DLS cells with magnetic couple and without it, on the different operating frequencies and with the different couple coefficient were carried out. The best option will be manufactured, measured and used in the accelerator structure.

WEPSB08

Multi-beam Generator Cavity for the Proton Linear Accelerator Feeding System on 991 MHz Frequency Geometry Optimization

cavity, impedance, proton, electron

171

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

For the proton linear accelerator feeding system 800 kW input power value is required. The system consists from pillbox cavity with six beam tubes connected to the rectangular waveguide as a power output system is designed. In case of using high voltage gun with modulated six-bunch injection, this system allows to transform the energy of electron bunches which flies throw beam tubes to accelerating section feeding power. Different types of the structure geometry were calculated. The whole structure consists both from generator cavity and accelerating structure has been designed.

WEPSB13

Oversized Interference Switches of Active Microwave Pulse Compressors

cavity, extraction, operation, plasma

183

V.S. Igumnov, S.N. Artemenko, V.A. Avgustinovich, S.A. Gorev, V.L. Kaminski, S.A. Novikov, Yu.G. Yushkov
TPU, Tomsk, Russia

Funding: "Science" state order of the Russian Ministry of Education and Science.
Results of simulation and experimental study of two types of the oversized interference switches are presented. The switch of the first type was developed on basis of the simulation of the oversized rectangular waveguide H-tee with the H01 operation mode. Conditions of effective operation of the first type switch as an energy extraction element of active microwave pulse compressors are determined. The output pulse power of 2.8 MW and pulse width of 3.5 ns with the corresponding amplification factor of 17.5 dB for were obtained in the X-band microwave pulse compressor prototype containing the storage cavity made of WR-284 waveguide and the switch made of the waveguide with the cross section area of 58×25 mm2. The results of experimental study of the oversized X-band interference switch of the second type with the synchronous energy extraction through a compact packet of common single mode switches incorporating the five identical waveguide tees are presented as well. Possibility of full synchronization of the switch packet is proved and the conditions of such synchronization are determined. Permissible quantity of the switches in a packet unit is estimated. The output pulse power of 0.8 MW, pulse width of 3.2 ns at the power gain of 12 dB and the pulse power of 2.2 MW, pulse width of 3.5 ns at the power gain of 16.5 dB were obtained when the energy extraction from the five different single mode resonant cavities and an oversized cavity respectively was synchronous.

WEPSB35

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

simulation, linac, electron, medical-accelerators

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.

THX02

Experience in Research, Development, Construction and Commissioning of Normally Conducting Accelerating Structures

linac, HOM, simulation, cavity

278

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

The experience and results of research, development, construction and start of normally conducting accelerating structures for high intensity hadron linear accelerators at medium and high energii is summarized Created methods and obtained results provided construction and start of operation of accelerating system in INR H⁻ linac with designed energy 600 MeV. The research results allow generalize the properties of high energy structures and develop methods and criteria for improvements, with were realized in the development and commissioning of accelerating structures in another foreign laboratories. Basing on research results, the high energy accelerating structure, which surpasses analogues in the total list of parameters, is proposed and approved.

Slides THX02 [1.259 MB]

THPSC04

Study of Normal Conducting Accelerating Structures for Megawatt Proton Driver Linac

rfq, linac, cavity, Windows

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.