RuPAC2021 - List of Authors (Gavrilov, S.A.)

Paper	Title	Page
WEPSC50	Enhancement of Transverse Beam Phase Space Analysis by Tomography Method at INR Linac	433
	A.I. Titov, S. Bragin, S.A. Gavrilov, O. Volodkevich RAS/INR, Moscow, Russia S.A. Gavrilov, A.I. Titov MIPT, Dolgoprudniy, Moscow Region, Russia
	The investigation of transverse beam phase space parameters behavior along the accelerator is important for proper accelerator tuning. At INR RAS linac transverse emittance and Twiss parameters are reconstructed from beam profile measurements with quadrupole scan technique at several measurement points along the accelerator. Profile treatment is performed with ordinary transverse profiles method and tomographic reconstruction method. Various experimental data is presented. The comparison of the results obtained by the two methods is done. Features of beam dynamics simulation based on the data from these methods are discussed.
	Poster WEPSC50 [6.621 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC50
About •	Received ※ 17 September 2021 — Revised ※ 21 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 22 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPSC51	Concept of Decision Support System for INR RAS Linac Beam Tuning	436
	A.I. Titov, S.A. Gavrilov RAS/INR, Moscow, Russia S.A. Gavrilov, A.I. Titov MIPT, Dolgoprudniy, Moscow Region, Russia
	During the last decade, instruments of machine learning are gaining popularity in accelerator control systems. One of these instruments is decision support system (DSS) that is already successfully used in other fields of science. In this article a motivation for implementation of such system for INR RAS linac tuning is discussed. Concept of developed DSS is presented. Changes in INR RAS linac data acquisition system essential for future DSS operation are proposed.
	Poster WEPSC51 [6.759 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC51
About •	Received ※ 21 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 01 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOX02	Development and Implementation of Bunch Shape Instrumentation for Ion Linacs	1
	A. Feschenko, V. Gaidash, S.A. Gavrilov RAS/INR, Moscow, Russia
	A longitudinal charge distribution in beam bunches, so-called bunch shape, is one of the most important and difficult to measure characteristics of a beam in ion linear accelerators. Despite the variety of approaches only the methods using low energy secondary electrons emitted, when the beam passes through a thin target, found practical application. The most common beam instrumentation, based on this method, became Bunch Shape Monitor developed in INR RAS. The monitor provides direct measurements of bunch shape and bunch longitudinal halo, allows to carry out such complex diagnostic procedures as longitudinal emittance measurements, amplitude and phase setting of accelerating cavities and control of bunch shape evolution in time to check the overall quality of longitudinal tuning of the accelerator. The principle of the monitor operation, design features, ultimate parameters and limitations are discussed. Several modifications of the monitor with implementation peculiarities are described as well as lots of measurement results at different ion linacs with a variety of beam parameters. New challenges for bunch shape instrumentation to satisfy demands of forthcoming linacs are also characterized.
	Slides MOX02 [9.840 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOX02
About •	Received ※ 30 September 2021 — Revised ※ 04 October 2021 — Accepted ※ 07 October 2021 — Issued ※ 20 October 2021
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TUPSB39	Study of Space Charge Compensation Process of a 400 KeV Pulsed Hydrogen Ion Beam	313
	A. Belov, O.T. Frolov, S.A. Gavrilov, L.P. Nechaeva, A.V. Turbabin, V. Zubets RAS/INR, Moscow, Russia
	Funding: Institute for Nuclear Research of the Russian Academy of Sciences, Moscow, Russia A three grid energy analyzer of slow secondary ions with a twin analyzing grid is described. The analyzer has cylindrical geometry and Pi angle for recording of the slow ions. The analyzer has been used for measurements of degree of space-charge compensation (SCC) of a pulsed hydrogen ion beam with energy of 400 keV and peak beam current of 60 mA. Results of the measurements are presented and compared with theoretical estimations based on model in which the SCC degree is limited by heating of electrons in collisions with fast ions of the beam.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB39
About •	Received ※ 20 September 2021 — Revised ※ 05 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 16 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Enhancement of Transverse Beam Phase Space Analysis by Tomography Method at INR Linac

433

A.I. Titov, S. Bragin, S.A. Gavrilov, O. Volodkevich
RAS/INR, Moscow, Russia
S.A. Gavrilov, A.I. Titov
MIPT, Dolgoprudniy, Moscow Region, Russia

The investigation of transverse beam phase space parameters behavior along the accelerator is important for proper accelerator tuning. At INR RAS linac transverse emittance and Twiss parameters are reconstructed from beam profile measurements with quadrupole scan technique at several measurement points along the accelerator. Profile treatment is performed with ordinary transverse profiles method and tomographic reconstruction method. Various experimental data is presented. The comparison of the results obtained by the two methods is done. Features of beam dynamics simulation based on the data from these methods are discussed.

Poster WEPSC50 [6.621 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC50

About •

Received ※ 17 September 2021 — Revised ※ 21 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 22 October 2021

Cite •

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

WEPSC51

Concept of Decision Support System for INR RAS Linac Beam Tuning

436

A.I. Titov, S.A. Gavrilov
RAS/INR, Moscow, Russia
S.A. Gavrilov, A.I. Titov
MIPT, Dolgoprudniy, Moscow Region, Russia

During the last decade, instruments of machine learning are gaining popularity in accelerator control systems. One of these instruments is decision support system (DSS) that is already successfully used in other fields of science. In this article a motivation for implementation of such system for INR RAS linac tuning is discussed. Concept of developed DSS is presented. Changes in INR RAS linac data acquisition system essential for future DSS operation are proposed.

Poster WEPSC51 [6.759 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC51

About •

Received ※ 21 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 01 October 2021

Cite •

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

MOX02

Development and Implementation of Bunch Shape Instrumentation for Ion Linacs

1

A. Feschenko, V. Gaidash, S.A. Gavrilov
RAS/INR, Moscow, Russia

A longitudinal charge distribution in beam bunches, so-called bunch shape, is one of the most important and difficult to measure characteristics of a beam in ion linear accelerators. Despite the variety of approaches only the methods using low energy secondary electrons emitted, when the beam passes through a thin target, found practical application. The most common beam instrumentation, based on this method, became Bunch Shape Monitor developed in INR RAS. The monitor provides direct measurements of bunch shape and bunch longitudinal halo, allows to carry out such complex diagnostic procedures as longitudinal emittance measurements, amplitude and phase setting of accelerating cavities and control of bunch shape evolution in time to check the overall quality of longitudinal tuning of the accelerator. The principle of the monitor operation, design features, ultimate parameters and limitations are discussed. Several modifications of the monitor with implementation peculiarities are described as well as lots of measurement results at different ion linacs with a variety of beam parameters. New challenges for bunch shape instrumentation to satisfy demands of forthcoming linacs are also characterized.

Slides MOX02 [9.840 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-MOX02

About •

Received ※ 30 September 2021 — Revised ※ 04 October 2021 — Accepted ※ 07 October 2021 — Issued ※ 20 October 2021

Cite •

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

TUPSB39

Study of Space Charge Compensation Process of a 400 KeV Pulsed Hydrogen Ion Beam

313

A. Belov, O.T. Frolov, S.A. Gavrilov, L.P. Nechaeva, A.V. Turbabin, V. Zubets
RAS/INR, Moscow, Russia

Funding: Institute for Nuclear Research of the Russian Academy of Sciences, Moscow, Russia
A three grid energy analyzer of slow secondary ions with a twin analyzing grid is described. The analyzer has cylindrical geometry and Pi angle for recording of the slow ions. The analyzer has been used for measurements of degree of space-charge compensation (SCC) of a pulsed hydrogen ion beam with energy of 400 keV and peak beam current of 60 mA. Results of the measurements are presented and compared with theoretical estimations based on model in which the SCC degree is limited by heating of electrons in collisions with fast ions of the beam.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB39

About •

Received ※ 20 September 2021 — Revised ※ 05 October 2021 — Accepted ※ 09 October 2021 — Issued ※ 16 October 2021

Cite •

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