IPAC2015 - List of Authors (Leng, Y.B.)

Paper	Title	Page
MOPTY019	Precise Position Measurement by Analyzing the Correlation Between Electrodes of a Single Bpm	975
	Z.C. Chen SSRF, Shanghai, People's Republic of China L.W. Lai, Y.B. Leng, Y.B. Yan SINAP, Shanghai, People's Republic of China
	Beam position is one of the most important parameters in a particle accelerator. The more accurate and precise the measurement system is, the more features of the beam dynamics could be revealed. A method called model-independent analysis (MIA) takes advantage of multiple beam position monitors (BPM) on the storage ring to obtain the actual beam positions by removing the random noise of each BPM. Inspired by MIA, the original voltage waveforms obtained from the electrodes of a single BPM can also be decomposed to get the beam position information. This article discusses the results of the experiments and the evaluation of the performance of the BPM at the Shanghai Institute of Applied Physics.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY019
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TUPJE023	Consideration on the Future Major Upgrades of the SSRF Storage Ring	1672
	Z.T. Zhao, B.C. Jiang, Y.B. Leng, S.Q. Tian, L. Yin, M.Z. Zhang SINAP, Shanghai, People's Republic of China
	The SSRF storage ring was in operation from 2008, currently it is operating at the energy of 3.5GeV, the natural emittance of 3.9 nm-rad and the beam current of 240 mA, serving for 13 beamlines with 9 IDs. There will be around 40 operated beamlines around 2020, which need some upgrade of the storage ring existing performance, such as the new lattice with superbends. And looking for the future beyond, the major upgrade towards a diffraction limited storage ring is under consideration. This paper presents the initial investigation and the proposal on the ultimate storage ring upgrade for SSRF.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-TUPJE023
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MOPTY020	An Intelligent Trigger Abnormal Beam Operation Monitoring Processor at the SSRF	978
	L.W. Lai, Z.C. Chen, Y.B. Leng, Y.B. Yan SSRF, Shanghai, People's Republic of China
	Funding: Work supported by National Nature Science Fundation of China(11305253)(11375255)(11105211) An intelligent trigger abnormal beam operation monitoring processor has been designed at the SSRF. By applying digital signal processing algorithms in FPGA, the processor keeps monitoring the beam operation status. It will output a trigger signal and store the turn-by-turn beam position data when abnormal events detected. The abnormal events include injection, beam loss, and abnormal disturbance. This ability makes the processor a powerful tool for abnormal operation causes analysing and machine study.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY020
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MOPTY021	Measurement of Clock Jitter in Beam Diagnostic System	981
	Y. Yang, Y.B. Leng, Y.B. Yan SSRF, Shanghai, People's Republic of China
	Low clock jitter can improve the performance of beam diagnostic system. This paper presents a procedure for the direct measurement of low-level clock jitter. High resolution spectrum analyzer or broadband high sampling rate oscilloscope is not demanded by using this method. Simulation will be introduced.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY021
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MOPTY022	Bunch by Bunch DBPM Processor Development and Preliminary Experiment in SSRF*	984
	Y.B. Leng, Z.C. Chen, L.W. Lai, Y.B. Yan, Y. Yang SSRF, Shanghai, People's Republic of China
	Funding: Work supported by Chinese NSFC11375255. Digital BPM processor with turn-by-turn capability has been widely used in synchrotron radiation facilities over the world, which is proved to be very useful and powerful for daily operation and linear optics study but not good enough in the case of individual bunch information required. In order to sufficient individual bunch diagnostics requirements a development plan of the next generation DBPM processor with bunch-by-bunch capability has been initiated in SINAP since 2012. The whole development was divided into three steps: a concept processor based on digital oscilloscope IOC, an algorithm prototype processor based on commercial high speed ADC board, and a custom designed dedicated processor. The progress of this work and several preliminary beam experiments will be discussed in this paper.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY022
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Paper

Title

Page

Precise Position Measurement by Analyzing the Correlation Between Electrodes of a Single Bpm

975

Z.C. Chen
SSRF, Shanghai, People's Republic of China
L.W. Lai, Y.B. Leng, Y.B. Yan
SINAP, Shanghai, People's Republic of China

Beam position is one of the most important parameters in a particle accelerator. The more accurate and precise the measurement system is, the more features of the beam dynamics could be revealed. A method called model-independent analysis (MIA) takes advantage of multiple beam position monitors (BPM) on the storage ring to obtain the actual beam positions by removing the random noise of each BPM. Inspired by MIA, the original voltage waveforms obtained from the electrodes of a single BPM can also be decomposed to get the beam position information. This article discusses the results of the experiments and the evaluation of the performance of the BPM at the Shanghai Institute of Applied Physics.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY019

Export •

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

TUPJE023

Consideration on the Future Major Upgrades of the SSRF Storage Ring

1672

Z.T. Zhao, B.C. Jiang, Y.B. Leng, S.Q. Tian, L. Yin, M.Z. Zhang
SINAP, Shanghai, People's Republic of China

The SSRF storage ring was in operation from 2008, currently it is operating at the energy of 3.5GeV, the natural emittance of 3.9 nm-rad and the beam current of 240 mA, serving for 13 beamlines with 9 IDs. There will be around 40 operated beamlines around 2020, which need some upgrade of the storage ring existing performance, such as the new lattice with superbends. And looking for the future beyond, the major upgrade towards a diffraction limited storage ring is under consideration. This paper presents the initial investigation and the proposal on the ultimate storage ring upgrade for SSRF.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-TUPJE023

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

MOPTY020

An Intelligent Trigger Abnormal Beam Operation Monitoring Processor at the SSRF

978

L.W. Lai, Z.C. Chen, Y.B. Leng, Y.B. Yan
SSRF, Shanghai, People's Republic of China

Funding: Work supported by National Nature Science Fundation of China(11305253)(11375255)(11105211)
An intelligent trigger abnormal beam operation monitoring processor has been designed at the SSRF. By applying digital signal processing algorithms in FPGA, the processor keeps monitoring the beam operation status. It will output a trigger signal and store the turn-by-turn beam position data when abnormal events detected. The abnormal events include injection, beam loss, and abnormal disturbance. This ability makes the processor a powerful tool for abnormal operation causes analysing and machine study.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY020

Export •

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

MOPTY021

Measurement of Clock Jitter in Beam Diagnostic System

981

Y. Yang, Y.B. Leng, Y.B. Yan
SSRF, Shanghai, People's Republic of China

Low clock jitter can improve the performance of beam diagnostic system. This paper presents a procedure for the direct measurement of low-level clock jitter. High resolution spectrum analyzer or broadband high sampling rate oscilloscope is not demanded by using this method. Simulation will be introduced.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY021

Export •

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

MOPTY022

Bunch by Bunch DBPM Processor Development and Preliminary Experiment in SSRF*

984

Y.B. Leng, Z.C. Chen, L.W. Lai, Y.B. Yan, Y. Yang
SSRF, Shanghai, People's Republic of China

Funding: Work supported by Chinese NSFC11375255.
Digital BPM processor with turn-by-turn capability has been widely used in synchrotron radiation facilities over the world, which is proved to be very useful and powerful for daily operation and linear optics study but not good enough in the case of individual bunch information required. In order to sufficient individual bunch diagnostics requirements a development plan of the next generation DBPM processor with bunch-by-bunch capability has been initiated in SINAP since 2012. The whole development was divided into three steps: a concept processor based on digital oscilloscope IOC, an algorithm prototype processor based on commercial high speed ADC board, and a custom designed dedicated processor. The progress of this work and several preliminary beam experiments will be discussed in this paper.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPTY022

Export •

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