RuPAC2021 - List of Keywords (coupling)

Paper	Title	Other Keywords	Page
MOPSA03	Calculations of Ion Dynamics and Elecrodynamics Characteristics of 800 KeV/nucleon RFQ	emittance, cavity, Windows, rfq	135
	M.A. Guzov, A.M. Opekunov, L.E. Polyakov, N.V. Zavyalov RFNC-VNIIEF, Sarov, Nizhniy Novgorod region, Russia M.A. Guzov, E.N. Indiushnii, Y. Lozeev, A.I. Makarov, S.M. Polozov MEPhI, Moscow, Russia M.L. Smetanin, A.V. Telnov VNIIEF, Sarov, Russia
	Accelerating structure with radio-frequency quadrupole focusing (RFQ) was observed in this research. The RFQ is aimed to bunch up, accelerate and focus 1 MeV/nucleon ions with A/Z from 1 to 3.2 (A - mass number of ion, Z - ion charge). The chemical elements from H⁺ to O5+ fill up this particle types range. The protons current is 2 mA and ion current is 1 mA. In this paper charged particle dynamics calculations, which essential for next electrodynamic cavity modeling, were performed. The electrodynamic model of 4-vane RFQ cavity with windows of magnetic connection was created. The dependence between frequency and cavity geometrics was defined. Topology of magnetic windows, which aimed to have the maximum mod separations, was determined. Different types of tanks were considered and corresponding electromagnetic characteristics were calculated. Tuning elements (plungers and spacers) influence on cavity was modeled. As a result optimized model of accelerating structure was realized.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA03
About •	Received ※ 20 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 07 October 2021 — Issued ※ 18 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPSA04	The Tuning of RF Parameters of 40 MHz RFQ	rfq, linac, cavity, Windows	139
	A. Sitnikov, G. Kropachev, T. Kulevoy, D.N. Selesnev, A.I. Semennikov ITEP, Moscow, Russia
	The new linac for A/Z = 8, output energy 4 MeV/u and 10 mA current is under development at NRC "Kurchatov Institute" - ITEP. The linac consists of Radio-Frequency Quadrupole (RFQ) and two sections of Drift Tube Linac (DTL). The 40 MHz 11 meters long RFQ is based on a 4-vane structure with magnetic coupling windows. The paper presents results of tuning radio-frequency (RF) RFQ parameters.
	Poster MOPSA04 [1.243 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA04
About •	Received ※ 24 September 2021 — Revised ※ 25 September 2021 — Accepted ※ 07 October 2021 — Issued ※ 16 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPSA06	Parameters of the Normal Conducting Accelerating Structure for the Up to 1 GeV Hadron Linacs	linac, cavity, multipactoring, hadron	142
	I.V. Rybakov, A. Feschenko, L.V. Kravchuk, V.V. Paramonov, V.L. Serov RAS/INR, Moscow, Russia
	Compensated bi-periodic accelerating structure Cut Disk Structure (CDS) was developed for accelerating particle beams at beta eq 1. In the papers dedicated to the development of this structure, a significant decrease in Ze was shown for medium energies range, beta 0.4-0.5. For high-intensity hadron linacs, this energy range, in which particles are captured to acceleration from the drift tube structure, is of the greatest interest. In this paper, a set of CDS parameters was obtained, which provides a Ze value not lower in the comparison to the proven structures in the medium energy range. By the comparison of the electrodynamic and technological parameters of CDS with these structures, the advantages of its application in multi-section cavities for the up to 1 GeV linacs are shown. The selection of optimal cells manufacturing tolerances, the method of its tuning before brazing and frequency parameters control, and the selection of the method for multipactor discharge suppression are determined. The results of the sketch project of the CDS cavity numerical simulation as a non-uniform coupled system and optimization of the transition part of sections and bridge devices are presented.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA06
About •	Received ※ 22 September 2021 — Revised ※ 28 September 2021 — Accepted ※ 07 October 2021 — Issued ※ 16 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPSA42	Compact S-Band Accelerating Structure for Medical Applications	linac, electron, impedance, bunching	186
	M.V. Lalayan, A. Batov, M. Gusarova, S.M. Polozov, R.A. Zbruev MEPhI, Moscow, Russia
	This paper describes electromagnetic design results for the compact 6.3 MeV electron linac for the radiation therapy facility. Linac is based on S-band biperiodic accelerating structure with inner coupling cells with an increased coupling coefficient.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA42
About •	Received ※ 01 October 2021 — Revised ※ 02 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 11 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPSC01	Unit for Matching a Driving Waveguide With a Cavity	cavity, GUI, ECR, Windows	340
	V.V. Paramonov RAS/INR, Moscow, Russia
	To match the driving waveguide, usually operating in the fundamental TE10 wave, with the accelerating structure, a device is required that performs the function of a wave-type transformer. In the microwave region, transforming devices with matching windows are usually used, the field distribution in which can also be described as TE-type. At the ends of the window from the side of the structure, regions with an increased density of Surface Currents (SC) inevitably arise, leading to an increase in the surface temperature in a place that is difficult to access for cooling. There are various solutions for matching windows, in order to reduce the maximum SC from the side of the structure , briefly mentioned in the report. A solution based on the dispersion properties of the waveguide and providing a significant additional decrease in the SC density is considered. This solution can be implemented in devices for S and lower frequency ranges.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC01
About •	Received ※ 06 September 2021 — Revised ※ 20 September 2021 — Accepted ※ 24 September 2021 — Issued ※ 22 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPSC04	Accelerating Structure of 8 MeV Electron Linac	electron, resonance, GUI, radiation	346
	A.N. Shein, I.V. Shorikov RFNC-VNIIEF, Sarov, Nizhniy Novgorod region, Russia A.V. Telnov VNIIEF, Sarov, Russia
	Linear resonance electron accelerator LU-10-20 is under operation in RFNC-VNIIEF since 1994. LU-10-20 is aimed at carrying out radiation processing of materials and researching radiation processes. The energy of accelerated electrons is up to 10 MeV, the average beam power - up to 12 kW. This accelerator has demonstrated that it is highly useful for performing radiation researches and tests. As of today work is underway on modernization of LU-10-20 including its accelerating structure and RF power supply. Accelerating structure is aimed at electron beam acceleration up to nominal energy and consists of complicated resonance TW RF structure, which uncluded iris-loaded waveguide, input and output matching devices. The paper presents the electrodynamic calculation results of modernized accelerating structure, input and output matching devices, and also beam dynamics calculation results. N.V.Zavyalov et al. Commercial linear accelerator of electrons LU-10-20. Materials of the XV All-Union Seminar on Linear Accelerators of Charged Particles, Nucl. Phys. Res.No2, 3(29, 30),1997, p.39-41.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC04
About •	Received ※ 28 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 18 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPSC05	Modeling of the Energy Compression System SLED for the LINAC-200 Accelerator	cavity, linac, electron, klystron	349
	K. Yunenko, M. Gostkin, V.V. Kobets, A. Zhemchugov JINR, Dubna, Moscow Region, Russia
	This paper is devoted to the research of the possibility of increasing the output energy of an electron beam at the LINAC-200 linear accelerator by using the SLED energy compression system with constant parameters of the storage cavities. In order to select the necessary parameters and characteristics for the successful creation of this system on the acceleratorm, the SLED system structure simulation and the characteristics of cylindrical hollow resonators calculation were conducted using the CST MICROWAVE STUDIO program.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC05
About •	Received ※ 18 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 16 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPSC12	Preliminary Calculation of the Power Coupler for the SYLA Storage Ring RF Cavity	cavity, storage-ring, operation, synchrotron	364
	S.V. Matsievskiy, M. Gusarova, M.V. Lalayan, Ya.V. Shashkov MEPhI, Moscow, Russia
	Several new accelerator facilities will be built in Russia in the next few years. One of those facilities is a 6 GeV storage ring light source, the Ultimate Source of Synchrotron Radiation to be built in Protvino, near Moscow. This paper considers storage ring RF cavity power coupler design issues and provides preliminary calculations of the device.
	Poster WEPSC12 [0.741 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC12
About •	Received ※ 08 September 2021 — Accepted ※ 27 September 2021 — Issued ※ 22 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOPSA03

Calculations of Ion Dynamics and Elecrodynamics Characteristics of 800 KeV/nucleon RFQ

emittance, cavity, Windows, rfq

135

M.A. Guzov, A.M. Opekunov, L.E. Polyakov, N.V. Zavyalov
RFNC-VNIIEF, Sarov, Nizhniy Novgorod region, Russia
M.A. Guzov, E.N. Indiushnii, Y. Lozeev, A.I. Makarov, S.M. Polozov
MEPhI, Moscow, Russia
M.L. Smetanin, A.V. Telnov
VNIIEF, Sarov, Russia

Accelerating structure with radio-frequency quadrupole focusing (RFQ) was observed in this research. The RFQ is aimed to bunch up, accelerate and focus 1 MeV/nucleon ions with A/Z from 1 to 3.2 (A - mass number of ion, Z - ion charge). The chemical elements from H⁺ to O5+ fill up this particle types range. The protons current is 2 mA and ion current is 1 mA. In this paper charged particle dynamics calculations, which essential for next electrodynamic cavity modeling, were performed. The electrodynamic model of 4-vane RFQ cavity with windows of magnetic connection was created. The dependence between frequency and cavity geometrics was defined. Topology of magnetic windows, which aimed to have the maximum mod separations, was determined. Different types of tanks were considered and corresponding electromagnetic characteristics were calculated. Tuning elements (plungers and spacers) influence on cavity was modeled. As a result optimized model of accelerating structure was realized.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA03

About •

Received ※ 20 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 07 October 2021 — Issued ※ 18 October 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPSA04

The Tuning of RF Parameters of 40 MHz RFQ

rfq, linac, cavity, Windows

139

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

The new linac for A/Z = 8, output energy 4 MeV/u and 10 mA current is under development at NRC "Kurchatov Institute" - ITEP. The linac consists of Radio-Frequency Quadrupole (RFQ) and two sections of Drift Tube Linac (DTL). The 40 MHz 11 meters long RFQ is based on a 4-vane structure with magnetic coupling windows. The paper presents results of tuning radio-frequency (RF) RFQ parameters.

Poster MOPSA04 [1.243 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA04

About •

Received ※ 24 September 2021 — Revised ※ 25 September 2021 — Accepted ※ 07 October 2021 — Issued ※ 16 October 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPSA06

Parameters of the Normal Conducting Accelerating Structure for the Up to 1 GeV Hadron Linacs

linac, cavity, multipactoring, hadron

142

I.V. Rybakov, A. Feschenko, L.V. Kravchuk, V.V. Paramonov, V.L. Serov
RAS/INR, Moscow, Russia

Compensated bi-periodic accelerating structure Cut Disk Structure (CDS) was developed for accelerating particle beams at beta eq 1. In the papers dedicated to the development of this structure, a significant decrease in Ze was shown for medium energies range, beta 0.4-0.5. For high-intensity hadron linacs, this energy range, in which particles are captured to acceleration from the drift tube structure, is of the greatest interest. In this paper, a set of CDS parameters was obtained, which provides a Ze value not lower in the comparison to the proven structures in the medium energy range. By the comparison of the electrodynamic and technological parameters of CDS with these structures, the advantages of its application in multi-section cavities for the up to 1 GeV linacs are shown. The selection of optimal cells manufacturing tolerances, the method of its tuning before brazing and frequency parameters control, and the selection of the method for multipactor discharge suppression are determined. The results of the sketch project of the CDS cavity numerical simulation as a non-uniform coupled system and optimization of the transition part of sections and bridge devices are presented.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA06

About •

Received ※ 22 September 2021 — Revised ※ 28 September 2021 — Accepted ※ 07 October 2021 — Issued ※ 16 October 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPSA42

Compact S-Band Accelerating Structure for Medical Applications

linac, electron, impedance, bunching

186

M.V. Lalayan, A. Batov, M. Gusarova, S.M. Polozov, R.A. Zbruev
MEPhI, Moscow, Russia

This paper describes electromagnetic design results for the compact 6.3 MeV electron linac for the radiation therapy facility. Linac is based on S-band biperiodic accelerating structure with inner coupling cells with an increased coupling coefficient.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOPSA42

About •

Received ※ 01 October 2021 — Revised ※ 02 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 11 October 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPSC01

Unit for Matching a Driving Waveguide With a Cavity

cavity, GUI, ECR, Windows

340

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

To match the driving waveguide, usually operating in the fundamental TE10 wave, with the accelerating structure, a device is required that performs the function of a wave-type transformer. In the microwave region, transforming devices with matching windows are usually used, the field distribution in which can also be described as TE-type. At the ends of the window from the side of the structure, regions with an increased density of Surface Currents (SC) inevitably arise, leading to an increase in the surface temperature in a place that is difficult to access for cooling. There are various solutions for matching windows, in order to reduce the maximum SC from the side of the structure , briefly mentioned in the report. A solution based on the dispersion properties of the waveguide and providing a significant additional decrease in the SC density is considered. This solution can be implemented in devices for S and lower frequency ranges.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC01

About •

Received ※ 06 September 2021 — Revised ※ 20 September 2021 — Accepted ※ 24 September 2021 — Issued ※ 22 October 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPSC04

Accelerating Structure of 8 MeV Electron Linac

electron, resonance, GUI, radiation

346

A.N. Shein, I.V. Shorikov
RFNC-VNIIEF, Sarov, Nizhniy Novgorod region, Russia
A.V. Telnov
VNIIEF, Sarov, Russia

Linear resonance electron accelerator LU-10-20 is under operation in RFNC-VNIIEF since 1994*. LU-10-20 is aimed at carrying out radiation processing of materials and researching radiation processes. The energy of accelerated electrons is up to 10 MeV, the average beam power - up to 12 kW. This accelerator has demonstrated that it is highly useful for performing radiation researches and tests. As of today work is underway on modernization of LU-10-20 including its accelerating structure and RF power supply. Accelerating structure is aimed at electron beam acceleration up to nominal energy and consists of complicated resonance TW RF structure, which uncluded iris-loaded waveguide, input and output matching devices. The paper presents the electrodynamic calculation results of modernized accelerating structure, input and output matching devices, and also beam dynamics calculation results.
*N.V.Zavyalov et al. Commercial linear accelerator of electrons LU-10-20. Materials of the XV All-Union Seminar on Linear Accelerators of Charged Particles, Nucl. Phys. Res.No2, 3(29, 30),1997, p.39-41.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC04

About •

Received ※ 28 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 18 October 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPSC05

Modeling of the Energy Compression System SLED for the LINAC-200 Accelerator

cavity, linac, electron, klystron

349

K. Yunenko, M. Gostkin, V.V. Kobets, A. Zhemchugov
JINR, Dubna, Moscow Region, Russia

This paper is devoted to the research of the possibility of increasing the output energy of an electron beam at the LINAC-200 linear accelerator by using the SLED energy compression system with constant parameters of the storage cavities. In order to select the necessary parameters and characteristics for the successful creation of this system on the acceleratorm, the SLED system structure simulation and the characteristics of cylindrical hollow resonators calculation were conducted using the CST MICROWAVE STUDIO program.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC05

About •

Received ※ 18 September 2021 — Revised ※ 01 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 16 October 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPSC12

Preliminary Calculation of the Power Coupler for the SYLA Storage Ring RF Cavity

cavity, storage-ring, operation, synchrotron

364

S.V. Matsievskiy, M. Gusarova, M.V. Lalayan, Ya.V. Shashkov
MEPhI, Moscow, Russia

Several new accelerator facilities will be built in Russia in the next few years. One of those facilities is a 6 GeV storage ring light source, the Ultimate Source of Synchrotron Radiation to be built in Protvino, near Moscow. This paper considers storage ring RF cavity power coupler design issues and provides preliminary calculations of the device.

Poster WEPSC12 [0.741 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC12

About •

Received ※ 08 September 2021 — Accepted ※ 27 September 2021 — Issued ※ 22 October 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)