RuPAC2021 - List of Authors (Morozov, I.A.)

Paper	Title	Page
TUA01	VEPP-4M Electron Positron Collider Operation at High Energy	34
	P.A. Piminov, G.N. Baranov, A.V. Bogomyagkov, V.M. Borin, V.L. Dorokhov, S.E. Karnaev, K.Yu. Karyukina, V.A. Kiselev, E.B. Levichev, O.I. Meshkov, S.I. Mishnev, I.A. Morozov, I.B. Nikolaev, I.N. Okunev, A.G. Shamov, E.A. Simonov, S.V. Sinyatkin, E.V. Starostina, V.N. Zhilich, A.A. Zhukov, A.N. Zhuravlev BINP SB RAS, Novosibirsk, Russia C. Todyshev Budker Institute of Nuclear Physics, Novosibirsk, Russia
	VEPP-4M is an electron positron collider equipped with the universal KEDR detector for HEP experiments in the beam energy range from 1 GeV to 6 GeV. A unique feature of VEPP 4M is the high precision beam energy calibration by resonant polarization technique which allows conducting of interesting experiments despite the low luminosity of the collider. Recently we have started new luminosity acquisition run above 2 GeV. The hadron cross section was measured from 2.3 GeV to 3.5 GeV has been done. The luminosity run for gamma-gamma physics has been started. The luminosity at Y(1S) meson has been obtained. For the beam energy calibration the laser polarimeter is used. The paper discusses recent results from VEPP 4M collider.
	Slides TUA01 [4.705 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUA01
About •	Received ※ 25 September 2021 — Revised ※ 08 October 2021 — Accepted ※ 13 October 2021 — Issued ※ 22 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WED04	Precise Analysis of Beam Optics at the VEPP-4M by Turn-by-Turn Betatron Phase Advance Measurement	79
	I.A. Morozov, P.A. Piminov, I.S. Yakimov BINP SB RAS, Novosibirsk, Russia
	Turn-by-turn (TbT) beam centroid signals can be used to evaluate various relevant accelerator parameters including betatron frequencies and optical functions. Accurate estimation of parameters and corresponding variances are important to drive accelerator lattice correction. Signals acquired from beam position monitors (BPMs) are limited by beam decoherence and BPM resolution. Therefore, it is important to obtain accurate estimations from available data. Several methods based on harmonic analysis of TbT data are compared and applied to the VEPP-4M experimental signals. The accuracy of betatron frequency, amplitude, and phase measurements are investigated. Optical functions obtained from amplitudes and phases are compared.
	Slides WED04 [3.771 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WED04
About •	Received ※ 12 September 2021 — Revised ※ 20 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 20 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPSC40	Detection of Anomalies in BPM Signals at the VEPP-4M	420
	I.A. Morozov, P.A. Piminov BINP SB RAS, Novosibirsk, Russia
	Beam position monitors (BPMs) are widely used for beam diagnostics in particle accelerators. Turn-by-turn (TbT) beam centroid data provide a means to estimate performance-critical accelerator parameters, like betatron frequency and optical functions. Parameter estimation accuracy is heavily related to TbT data quality. BPM faults might lead to erroneous estimation of accelerator parameters and should be accounted for achieving accurate and reliable results. Several anomaly detection methods for TbT data cleaning are considered. Derived features of BPM signals along with their robust dispersion estimation are used to flag faulty BPM signals. Estimated contamination factor is used with unsupervised learning methods (Local Outlier Factor and Isolation Forest). Application of anomaly detection methods for the VEPP-4M experimental TbT data is reported.
	Poster WEPSC40 [2.681 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC40
About •	Received ※ 05 September 2021 — Accepted ※ 20 September 2021 — Issued ※ 21 September 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

VEPP-4M Electron Positron Collider Operation at High Energy

34

P.A. Piminov, G.N. Baranov, A.V. Bogomyagkov, V.M. Borin, V.L. Dorokhov, S.E. Karnaev, K.Yu. Karyukina, V.A. Kiselev, E.B. Levichev, O.I. Meshkov, S.I. Mishnev, I.A. Morozov, I.B. Nikolaev, I.N. Okunev, A.G. Shamov, E.A. Simonov, S.V. Sinyatkin, E.V. Starostina, V.N. Zhilich, A.A. Zhukov, A.N. Zhuravlev
BINP SB RAS, Novosibirsk, Russia
C. Todyshev
Budker Institute of Nuclear Physics, Novosibirsk, Russia

VEPP-4M is an electron positron collider equipped with the universal KEDR detector for HEP experiments in the beam energy range from 1 GeV to 6 GeV. A unique feature of VEPP 4M is the high precision beam energy calibration by resonant polarization technique which allows conducting of interesting experiments despite the low luminosity of the collider. Recently we have started new luminosity acquisition run above 2 GeV. The hadron cross section was measured from 2.3 GeV to 3.5 GeV has been done. The luminosity run for gamma-gamma physics has been started. The luminosity at Y(1S) meson has been obtained. For the beam energy calibration the laser polarimeter is used. The paper discusses recent results from VEPP 4M collider.

Slides TUA01 [4.705 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUA01

About •

Received ※ 25 September 2021 — Revised ※ 08 October 2021 — Accepted ※ 13 October 2021 — Issued ※ 22 October 2021

Cite •

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

WED04

Precise Analysis of Beam Optics at the VEPP-4M by Turn-by-Turn Betatron Phase Advance Measurement

79

I.A. Morozov, P.A. Piminov, I.S. Yakimov
BINP SB RAS, Novosibirsk, Russia

Turn-by-turn (TbT) beam centroid signals can be used to evaluate various relevant accelerator parameters including betatron frequencies and optical functions. Accurate estimation of parameters and corresponding variances are important to drive accelerator lattice correction. Signals acquired from beam position monitors (BPMs) are limited by beam decoherence and BPM resolution. Therefore, it is important to obtain accurate estimations from available data. Several methods based on harmonic analysis of TbT data are compared and applied to the VEPP-4M experimental signals. The accuracy of betatron frequency, amplitude, and phase measurements are investigated. Optical functions obtained from amplitudes and phases are compared.

Slides WED04 [3.771 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WED04

About •

Received ※ 12 September 2021 — Revised ※ 20 September 2021 — Accepted ※ 23 September 2021 — Issued ※ 20 October 2021

Cite •

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

WEPSC40

Detection of Anomalies in BPM Signals at the VEPP-4M

420

I.A. Morozov, P.A. Piminov
BINP SB RAS, Novosibirsk, Russia

Beam position monitors (BPMs) are widely used for beam diagnostics in particle accelerators. Turn-by-turn (TbT) beam centroid data provide a means to estimate performance-critical accelerator parameters, like betatron frequency and optical functions. Parameter estimation accuracy is heavily related to TbT data quality. BPM faults might lead to erroneous estimation of accelerator parameters and should be accounted for achieving accurate and reliable results. Several anomaly detection methods for TbT data cleaning are considered. Derived features of BPM signals along with their robust dispersion estimation are used to flag faulty BPM signals. Estimated contamination factor is used with unsupervised learning methods (Local Outlier Factor and Isolation Forest). Application of anomaly detection methods for the VEPP-4M experimental TbT data is reported.

Poster WEPSC40 [2.681 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC40

About •

Received ※ 05 September 2021 — Accepted ※ 20 September 2021 — Issued ※ 21 September 2021

Cite •

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