SAP2023 - List of Authors (Xin, T.)

Paper	Title	Page
MOPB015	Optimization Design of Photocathode Injector Assisted by Deep Gaussian Process
	T. Xin, Z. Sun IHEP, Beijing, People’s Republic of China
	The Circular Electron-Positron Collider (CEPC) has high requirements for bunch charge, transverse emittance, and longitudinal length at the injector exit. Consequently, designing a high-performance injector has become a challenge. Therefore, we propose a method of searching in a high-dimensional parameter space using a multi-objective genetic algorithm to optimize the beam at the injector exit ,with an initial charge of 10 nC. Since the full simulation of bunch transportaion with spacecharge effect is extremly time consuming, we adopted the deep Gaussian process as an surrogate model to solve this issue. A total of 16 geometric parameters and 10 beam element parameters have been determined in this paper. We presented an design optimization for an injector consisting of a L-band radio frequency electron gun, a pair of solenoids, and a traveling wave tube. After calculating 6500 effective solutions, and good solutions are observed on the comprehensive performance. The corresponding transverse normalized emittance is 26.14 pi mm.mrad, and the rms beam length is 0.8 mm. Compared with the current design, the beam energy is increased by about 25%,the emittance is reduced by about 70%.
	Poster MOPB015 [0.563 MB]
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MOPB019	Development Status of Beam Dynamics Software APES for CEPC	49
	W.B. Liu, Z. Duan, H. Geng, T. Xin, Y. Zhang, Y.L. Zhao IHEP, Beijing, People’s Republic of China Y.X. Dai, Z.H. Li, W.B. Liu, M.Y. Su, Y. Zhang UCAS, Beijing, People’s Republic of China X.H. Lu IHEP CSNS, Guangdong Province, People’s Republic of China
	Funding: Innovative Fund of IHEP The physical design and research work of China Electron Positron Collider (CEPC) is an unprecedented challenge in the field of international accelerator collider. In the simulation research, many physical phenomena must be considered, including large Piwinski angle, crab waist colliding, strong nonlinear effect, energy sawtooth, beam-beam, etc. To address this challenge, a software project APES is proposed in 2021. And this project received support from the IHEP innovative fund in 2022. The progress and future plans of APES project will be introduced in the poster.
DOI •	reference for this paper ※ doi:10.18429/JACoW-SAP2023-MOPB019
About •	Received ※ 05 July 2023 — Accepted ※ 11 July 2023 — Issued ※ 16 September 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

MOPB015

Optimization Design of Photocathode Injector Assisted by Deep Gaussian Process

T. Xin, Z. Sun
IHEP, Beijing, People’s Republic of China

The Circular Electron-Positron Collider (CEPC) has high requirements for bunch charge, transverse emittance, and longitudinal length at the injector exit. Consequently, designing a high-performance injector has become a challenge. Therefore, we propose a method of searching in a high-dimensional parameter space using a multi-objective genetic algorithm to optimize the beam at the injector exit ,with an initial charge of 10 nC. Since the full simulation of bunch transportaion with spacecharge effect is extremly time consuming, we adopted the deep Gaussian process as an surrogate model to solve this issue. A total of 16 geometric parameters and 10 beam element parameters have been determined in this paper. We presented an design optimization for an injector consisting of a L-band radio frequency electron gun, a pair of solenoids, and a traveling wave tube. After calculating 6500 effective solutions, and good solutions are observed on the comprehensive performance. The corresponding transverse normalized emittance is 26.14 pi mm.mrad, and the rms beam length is 0.8 mm. Compared with the current design, the beam energy is increased by about 25%,the emittance is reduced by about 70%.

Poster MOPB015 [0.563 MB]

Cite •

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

MOPB019

Development Status of Beam Dynamics Software APES for CEPC

49

W.B. Liu, Z. Duan, H. Geng, T. Xin, Y. Zhang, Y.L. Zhao
IHEP, Beijing, People’s Republic of China
Y.X. Dai, Z.H. Li, W.B. Liu, M.Y. Su, Y. Zhang
UCAS, Beijing, People’s Republic of China
X.H. Lu
IHEP CSNS, Guangdong Province, People’s Republic of China

Funding: Innovative Fund of IHEP
The physical design and research work of China Electron Positron Collider (CEPC) is an unprecedented challenge in the field of international accelerator collider. In the simulation research, many physical phenomena must be considered, including large Piwinski angle, crab waist colliding, strong nonlinear effect, energy sawtooth, beam-beam, etc. To address this challenge, a software project APES is proposed in 2021. And this project received support from the IHEP innovative fund in 2022. The progress and future plans of APES project will be introduced in the poster.

DOI •

reference for this paper ※ doi:10.18429/JACoW-SAP2023-MOPB019

About •

Received ※ 05 July 2023 — Accepted ※ 11 July 2023 — Issued ※ 16 September 2024

Cite •

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