IBIC2021 - List of Authors (Zhou, T.Y.)

Paper	Title	Page
MOPP13	Design of Support for BPM Displacement Measurement System for Half and EPICS Connection	59
	C.H. Wang, P. Lu, B.G. Sun, L.L. Tang, T.Y. Zhou USTC/NSRL, Hefei, Anhui, People’s Republic of China
	The beam orbit stability is an important parameter to measure the stability of the synchrotron radiation source. As for the fourth-generation storage ring, the emittance and beam size continue to decrease and higher requirements are being put for-ward for beam orbit stability. There are two main factors that affect the stability of the beam orbit. One is the vibration of the ground and other systems, which requires highly mechanically stable support. The other is due to synchrotron radiation and changes in ambient temperature, which lead to the expansion and deformation of the vacuum chamber, causing BPM movement and misjudging the position of the beam orbit. The misjudging will introduce errors in the orbit feedback system and decrease the stability of the beam orbit. Therefore, a set of offline BPM (beam position monitor) displacement measurement system with high stability was built. However, considering the adverse effect of the INVAR36 on magnetic field and the drift of the displacement data, we added carbon fiber to the new support for BPM displacement measurement probes. Besides we realized the function of real-time reading BPM displacement data through EPICS. This article mainly introduces the support design and EPICS connection of the BPM displacement measurement system.
	Poster MOPP13 [0.834 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-MOPP13
About •	paper received ※ 08 September 2021 paper accepted ※ 17 September 2021 issue date ※ 10 October 2021
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPP06	Simulation of a Quad-Slits Interferometer for Measuring the Transverse Beam Size in HLS-II	198
	S.S. Jin, B.G. Sun, L.L. Tang, J.G. Wang, F.F. Wu, Y.K. Zhao, T.Y. Zhou USTC/NSRL, Hefei, Anhui, People’s Republic of China
	In this paper, a quad-slits interferometer using visible light is designed to measure the transverse beam size of Hefei Light Source-II (HLS-II). According to the beam parameters of the B7 source point, the preliminary simulation results are obtained by using the Synchrotron Radiation Workshop (SRW) code. Furthermore, the core parameters of the quad-slits components in the interferometer are optimized. Among, the optimum slits-separations of dH and dV are acquired to be 6.0 mm and 10.0 mm, respectively. It is shown that the simulated results are consistent with the theoretical values, which provides a reference value for performing the related experiments in the future.
	Poster TUPP06 [1.492 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-TUPP06
About •	paper received ※ 06 September 2021 paper accepted ※ 16 September 2021 issue date ※ 02 October 2021
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPP06	Observation and Analysis of Island Phenomenon in the Storage Ring Light Source	373
	Y.K. Zhao, S.S. Jin, P. Lu, B.G. Sun, L.L. Tang, J.G. Wang, F.F. Wu, T.Y. Zhou USTC/NSRL, Hefei, Anhui, People’s Republic of China
	In the previous experimental investigations and measurements using the radio-frequency (RF) phase modulation method to study the longitudinal beam characteristics of the Hefei Light Source-II (HLS-II), we found that the longitudinal bunch distributions under different modulation frequencies and amplitudes have great difference. In order to further explore island phenomenon and better understand beam motion associated with external RF phase modulation, the streak camera is exploited to effectively observe the longitudinal bunch profile and distribution in single-bunch filling mode. In addition, the dependence between island size, bunch dilution effect and modulation frequency are also discussed in detail. This is meaningful for researching the impact of RF noise on longitudinal beam dynamics, beam manipulation, and machine maintenance and debugging.
	Poster WEPP06 [2.545 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-WEPP06
About •	paper received ※ 02 September 2021 paper accepted ※ 17 September 2021 issue date ※ 02 October 2021
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPP07	Design and Simulation of the Coupling Structure for Single Resonant Cavity Bunch Length Monitor	377
	H.X. Tuo, P. Lu, Q. Luo, B.G. Sun, F.F. Wu, T.Y. Zhou USTC/NSRL, Hefei, Anhui, People’s Republic of China
	The measurement of the bunch length can better realize the monitoring of the beam, because the bunch length is one of the important longitudinal parameters of the beam. In this paper, a new single-cavity bunch length monitor is proposed, whose coupling structures consist of two kinds of filters. One is a low pass filter, the other is a band pass filter. The coaxial low-pass filter is used to couple out lowfrequency signals, and the band-pass filter is used to couple higher-frequency signals. According to the beam characteristics of the National Synchrotron Radiation Laboratory (NSRL)based on the tunable infrared laser energy chemistry research large-scale experimental device (FELiChEM), we perform simulation in CST. The simulation results show that the monitor can measure the bunch length of the FELiChEM device very well, and the simulation measurement error is less than 2%.
	Poster WEPP07 [0.440 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-WEPP07
About •	paper received ※ 08 September 2021 paper accepted ※ 27 September 2021 issue date ※ 01 October 2021
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Design of Support for BPM Displacement Measurement System for Half and EPICS Connection

59

C.H. Wang, P. Lu, B.G. Sun, L.L. Tang, T.Y. Zhou
USTC/NSRL, Hefei, Anhui, People’s Republic of China

The beam orbit stability is an important parameter to measure the stability of the synchrotron radiation source. As for the fourth-generation storage ring, the emittance and beam size continue to decrease and higher requirements are being put for-ward for beam orbit stability. There are two main factors that affect the stability of the beam orbit. One is the vibration of the ground and other systems, which requires highly mechanically stable support. The other is due to synchrotron radiation and changes in ambient temperature, which lead to the expansion and deformation of the vacuum chamber, causing BPM movement and misjudging the position of the beam orbit. The misjudging will introduce errors in the orbit feedback system and decrease the stability of the beam orbit. Therefore, a set of offline BPM (beam position monitor) displacement measurement system with high stability was built. However, considering the adverse effect of the INVAR36 on magnetic field and the drift of the displacement data, we added carbon fiber to the new support for BPM displacement measurement probes. Besides we realized the function of real-time reading BPM displacement data through EPICS. This article mainly introduces the support design and EPICS connection of the BPM displacement measurement system.

Poster MOPP13 [0.834 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-MOPP13

About •

paper received ※ 08 September 2021 paper accepted ※ 17 September 2021 issue date ※ 10 October 2021

Export •

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

TUPP06

Simulation of a Quad-Slits Interferometer for Measuring the Transverse Beam Size in HLS-II

198

S.S. Jin, B.G. Sun, L.L. Tang, J.G. Wang, F.F. Wu, Y.K. Zhao, T.Y. Zhou
USTC/NSRL, Hefei, Anhui, People’s Republic of China

In this paper, a quad-slits interferometer using visible light is designed to measure the transverse beam size of Hefei Light Source-II (HLS-II). According to the beam parameters of the B7 source point, the preliminary simulation results are obtained by using the Synchrotron Radiation Workshop (SRW) code. Furthermore, the core parameters of the quad-slits components in the interferometer are optimized. Among, the optimum slits-separations of dH and dV are acquired to be 6.0 mm and 10.0 mm, respectively. It is shown that the simulated results are consistent with the theoretical values, which provides a reference value for performing the related experiments in the future.

Poster TUPP06 [1.492 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-TUPP06

About •

paper received ※ 06 September 2021 paper accepted ※ 16 September 2021 issue date ※ 02 October 2021

Export •

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

WEPP06

Observation and Analysis of Island Phenomenon in the Storage Ring Light Source

373

Y.K. Zhao, S.S. Jin, P. Lu, B.G. Sun, L.L. Tang, J.G. Wang, F.F. Wu, T.Y. Zhou
USTC/NSRL, Hefei, Anhui, People’s Republic of China

In the previous experimental investigations and measurements using the radio-frequency (RF) phase modulation method to study the longitudinal beam characteristics of the Hefei Light Source-II (HLS-II), we found that the longitudinal bunch distributions under different modulation frequencies and amplitudes have great difference. In order to further explore island phenomenon and better understand beam motion associated with external RF phase modulation, the streak camera is exploited to effectively observe the longitudinal bunch profile and distribution in single-bunch filling mode. In addition, the dependence between island size, bunch dilution effect and modulation frequency are also discussed in detail. This is meaningful for researching the impact of RF noise on longitudinal beam dynamics, beam manipulation, and machine maintenance and debugging.

Poster WEPP06 [2.545 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-WEPP06

About •

paper received ※ 02 September 2021 paper accepted ※ 17 September 2021 issue date ※ 02 October 2021

Export •

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

WEPP07

Design and Simulation of the Coupling Structure for Single Resonant Cavity Bunch Length Monitor

377

H.X. Tuo, P. Lu, Q. Luo, B.G. Sun, F.F. Wu, T.Y. Zhou
USTC/NSRL, Hefei, Anhui, People’s Republic of China

The measurement of the bunch length can better realize the monitoring of the beam, because the bunch length is one of the important longitudinal parameters of the beam. In this paper, a new single-cavity bunch length monitor is proposed, whose coupling structures consist of two kinds of filters. One is a low pass filter, the other is a band pass filter. The coaxial low-pass filter is used to couple out lowfrequency signals, and the band-pass filter is used to couple higher-frequency signals. According to the beam characteristics of the National Synchrotron Radiation Laboratory (NSRL)based on the tunable infrared laser energy chemistry research large-scale experimental device (FELiChEM), we perform simulation in CST. The simulation results show that the monitor can measure the bunch length of the FELiChEM device very well, and the simulation measurement error is less than 2%.

Poster WEPP07 [0.440 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2021-WEPP07

About •

paper received ※ 08 September 2021 paper accepted ※ 27 September 2021 issue date ※ 01 October 2021

Export •

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