FLS2023 - List of Authors (Jiao, Y.)

Paper	Title	Page
MO3B4	Generating High Repetition Rate X-ray Attosecond Pulses in SAPS	22
	W. Liu, X. Liu, Y. Zhao IHEP CSNS, Guangdong Province, People’s Republic of China Y. Jiao, X. Li, S. Wang IHEP, Beijing, People’s Republic of China
	Attosecond, which refers to 10^-18 seconds, is the timescale of electron motion within an atom. Accurate observation of electron motion helps deepen the understanding of microscopic quantum processes such as charge transfer in molecules, wave packet dynamics, and charge transfer in organic photovoltaic materials. To meet the needs of relevant research, the South Advanced Photon Source (SAPS), currently in the design phase, is considering the construction of an attosecond beamline. This paper presents relevant research on achieving high-repetition-rate coherent attosecond pulses on the fourth-generation storage ring at SAPS. Realizing attosecond pulses in a storage ring requires femtosecond to sub-femtosecond-level longitudinal modulation of the beam, and the modulation scheme needs to consider multiple factors to avoid a significant impact on other users. The study shows that with high-power, few-cycle lasers, and advanced beam modulation techniques, the photon flux of attosecond pulses can be significantly enhanced with a minimal impact on the brightness of synchrotron radiation. Adopting high-repetition-rate lasers and precise time delay control, the repetition rate of attosecond pulses at SAPS can reach the megahertz level. Currently, the design wavelength range for attosecond pulses covers the water window (2.3-4.4 nm), which is "transparent" to water but strongly absorbed by elements constituting living organisms. This wavelength range has significant application value in fields such as biology and chemistry.
	Slides MO3B4 [3.400 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-FLS2023-MO3B4
About •	Received ※ 23 August 2023 — Revised ※ 24 August 2023 — Accepted ※ 31 August 2023 — Issued ※ 02 December 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TU3B3	Pyapas: A New Framework for High Level Application Development at HEPS	77
	X.H. Lu IHEP CSNS, Guangdong Province, People’s Republic of China D. Ji, H.F. Ji, Y. Jiao, J.Y. Li, N. Li, C. Meng, Y.M. Peng, J. Wan, Y. Wei, G. Xu, H.S. Xu, Y.L. Zhao IHEP, Beijing, People’s Republic of China
	The development of high-level application (HLA) is an indispensable part of the light source construction process. With the increase in the scale and complexity of accelerators, the development of HLA will also face many new challenges, such as increased data volume, multiple data types, more parameter channels, and more complex tuning algorithms. So a new framework named Pyapas has been designed for HLA development which aims to provide a high-performance, scalable, flexible, and reliable HLA development framework to meet the needs of large-scale parameter tuning and data processing. Pyapas is designed with a modular concept, decomposing the development needs of HLA into different modules for decoupled development, and calling them through simple interfaces. In the communication module, a singleton factory class is designed to avoid duplicate creation of channel connections, and combined with Qt’s signal-slot mechanism to create non-blocking communication connections, greatly improving the carrying capacity of parameter scale. While a deeply decoupled two-layer physical model module is designed to quickly switch different mathematical models to meet different online computing needs. Moreover, the design of the C/S architecture development module and the rapid creation and management module of the database is helpful for quickly developing complex programs, further enhancing the applicability of Pyapas. This paper will introduce the main feature of Pyapas
	Slides TU3B3 [6.913 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-FLS2023-TU3B3
About •	Received ※ 30 August 2023 — Revised ※ 31 August 2023 — Accepted ※ 01 September 2023 — Issued ※ 02 December 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TU4P27	Progress of the HEPS Accelerator Construction and Linac Commissioning	131
	C. Meng, J.S. Cao, Z. Duan, D.Y. He, P. He, H.F. Ji, Y. Jiao, W. Kang, J. Li, J.Y. Li, W.M. Pan, Y.M. Peng, H. Qu, S.K. Tian, G. Xu, H.S. Xu, J. Zhang, J.R. Zhang IHEP, Beijing, People’s Republic of China X.H. Lu IHEP CSNS, Guangdong Province, People’s Republic of China
	The High Energy Photon Source (HEPS) is the first fourth-generation synchrotron radiation source in China that has been on the track for construction. The accelerator complex of the light source is composed of a 7BA storage ring, a booster injector, a Linac pre-injector, and three transfer lines. In order to provide high-bunch-charge beams for the storage ring, the booster was designed to be capable of both beam acceleration from low injection energy to extraction energy and charge accumulation at the extraction energy by means of accepting electron bunches from the storage ring. The Linac was built using S-band normal conducting structures, and can provide electron beam with pulse charge up to 7 nC. This paper reports the progress of the construction of the accelerators, including the installation of the storage ring, the pre-commissioning tests of the booster, and commissioning of the Linac. In particular, the beam commissioning of the Linac will be introduced in detail.
DOI •	reference for this paper ※ doi:10.18429/JACoW-FLS2023-TU4P27
About •	Received ※ 29 August 2023 — Revised ※ 29 August 2023 — Accepted ※ 30 August 2023 — Issued ※ 02 December 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Generating High Repetition Rate X-ray Attosecond Pulses in SAPS

22

W. Liu, X. Liu, Y. Zhao
IHEP CSNS, Guangdong Province, People’s Republic of China
Y. Jiao, X. Li, S. Wang
IHEP, Beijing, People’s Republic of China

Attosecond, which refers to 10^-18 seconds, is the timescale of electron motion within an atom. Accurate observation of electron motion helps deepen the understanding of microscopic quantum processes such as charge transfer in molecules, wave packet dynamics, and charge transfer in organic photovoltaic materials. To meet the needs of relevant research, the South Advanced Photon Source (SAPS), currently in the design phase, is considering the construction of an attosecond beamline. This paper presents relevant research on achieving high-repetition-rate coherent attosecond pulses on the fourth-generation storage ring at SAPS. Realizing attosecond pulses in a storage ring requires femtosecond to sub-femtosecond-level longitudinal modulation of the beam, and the modulation scheme needs to consider multiple factors to avoid a significant impact on other users. The study shows that with high-power, few-cycle lasers, and advanced beam modulation techniques, the photon flux of attosecond pulses can be significantly enhanced with a minimal impact on the brightness of synchrotron radiation. Adopting high-repetition-rate lasers and precise time delay control, the repetition rate of attosecond pulses at SAPS can reach the megahertz level. Currently, the design wavelength range for attosecond pulses covers the water window (2.3-4.4 nm), which is "transparent" to water but strongly absorbed by elements constituting living organisms. This wavelength range has significant application value in fields such as biology and chemistry.

Slides MO3B4 [3.400 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-FLS2023-MO3B4

About •

Received ※ 23 August 2023 — Revised ※ 24 August 2023 — Accepted ※ 31 August 2023 — Issued ※ 02 December 2023

Cite •

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

TU3B3

Pyapas: A New Framework for High Level Application Development at HEPS

77

X.H. Lu
IHEP CSNS, Guangdong Province, People’s Republic of China
D. Ji, H.F. Ji, Y. Jiao, J.Y. Li, N. Li, C. Meng, Y.M. Peng, J. Wan, Y. Wei, G. Xu, H.S. Xu, Y.L. Zhao
IHEP, Beijing, People’s Republic of China

The development of high-level application (HLA) is an indispensable part of the light source construction process. With the increase in the scale and complexity of accelerators, the development of HLA will also face many new challenges, such as increased data volume, multiple data types, more parameter channels, and more complex tuning algorithms. So a new framework named Pyapas has been designed for HLA development which aims to provide a high-performance, scalable, flexible, and reliable HLA development framework to meet the needs of large-scale parameter tuning and data processing. Pyapas is designed with a modular concept, decomposing the development needs of HLA into different modules for decoupled development, and calling them through simple interfaces. In the communication module, a singleton factory class is designed to avoid duplicate creation of channel connections, and combined with Qt’s signal-slot mechanism to create non-blocking communication connections, greatly improving the carrying capacity of parameter scale. While a deeply decoupled two-layer physical model module is designed to quickly switch different mathematical models to meet different online computing needs. Moreover, the design of the C/S architecture development module and the rapid creation and management module of the database is helpful for quickly developing complex programs, further enhancing the applicability of Pyapas. This paper will introduce the main feature of Pyapas

Slides TU3B3 [6.913 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-FLS2023-TU3B3

About •

Received ※ 30 August 2023 — Revised ※ 31 August 2023 — Accepted ※ 01 September 2023 — Issued ※ 02 December 2023

Cite •

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

TU4P27

Progress of the HEPS Accelerator Construction and Linac Commissioning

131

C. Meng, J.S. Cao, Z. Duan, D.Y. He, P. He, H.F. Ji, Y. Jiao, W. Kang, J. Li, J.Y. Li, W.M. Pan, Y.M. Peng, H. Qu, S.K. Tian, G. Xu, H.S. Xu, J. Zhang, J.R. Zhang
IHEP, Beijing, People’s Republic of China
X.H. Lu
IHEP CSNS, Guangdong Province, People’s Republic of China

The High Energy Photon Source (HEPS) is the first fourth-generation synchrotron radiation source in China that has been on the track for construction. The accelerator complex of the light source is composed of a 7BA storage ring, a booster injector, a Linac pre-injector, and three transfer lines. In order to provide high-bunch-charge beams for the storage ring, the booster was designed to be capable of both beam acceleration from low injection energy to extraction energy and charge accumulation at the extraction energy by means of accepting electron bunches from the storage ring. The Linac was built using S-band normal conducting structures, and can provide electron beam with pulse charge up to 7 nC. This paper reports the progress of the construction of the accelerators, including the installation of the storage ring, the pre-commissioning tests of the booster, and commissioning of the Linac. In particular, the beam commissioning of the Linac will be introduced in detail.

DOI •

reference for this paper ※ doi:10.18429/JACoW-FLS2023-TU4P27

About •

Received ※ 29 August 2023 — Revised ※ 29 August 2023 — Accepted ※ 30 August 2023 — Issued ※ 02 December 2023

Cite •

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