SAP2023 - List of Authors (Li, H.H.)

Paper	Title	Page
MOPB031	Studies on Beam Injection System for Wuhan Advanced Light Source Storage Ring	73
	Y. Zou, Y. Chen, J.H. He, H.H. Li IAS, Wuhan City, People’s Republic of China
	Wuhan Advanced Light Source is the low-energy 4th generation advanced light source, proposed by Wuhan University. It includes a 1.5 GeV of full-energy LINAC injector, a 180 m circumference of low-emittance storage ring, and a series of state-of-the-art beam lines. The standard 7BA magnetic focusing structure is adopted for the storage ring to lower the beam emittance and the lattice has been well- designed and optimized by multiple-objective genetic algorithm to maximize the dynamic aperture and energy acceptance. The dynamic aperture of the storage ring at injection can reach up to 10 mm in the horizontal plane, which makes the off-axis beam injection method possible. An off-axis beam injection scheme based on the pulsed nonlinear magnet is to be employed for the storage ring. Detailed studies about the beam injection scheme, including the beam optical design, nonlinear magnet design and optimization, have been performed and multi-particle simulations have also been carried out to study the beam injection procedure.
DOI •	reference for this paper ※ doi:10.18429/JACoW-SAP2023-MOPB031
About •	Received ※ 01 July 2023 — Revised ※ 08 July 2023 — Accepted ※ 11 July 2023 — Issued ※ 11 July 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPB035	Beam Dynamics Study of a Photo-Injector at Wuhan Light Source	79
	Z.Y. Dai, Y. Chen, J.B. Guan, J.H. He, Z. Hui, H.H. Li, L.X. Liu, Z.S. Liu, Y. Nie, J. Wang, J.H. Zhong, W. Zhou, Y. Zou IAS, Wuhan City, People’s Republic of China H.C. Shi Zhejiang University, Institute for Fusion Theory and Simulation, Hangzhou, People’s Republic of China
	A photo-injector is under development at Wuhan Light Source (WHLS) to provide beams for the 1.5 GeV storage ring proposed as a fourth-generation synchrotron radiation light source and a future free electron laser (FEL) facility. The photo-injector and the following LINAC will be able to produce electron beams with low emittance (<2 mm·mrad), high bunch charge (~1 nC), small energy spread (<0.5%) , and short bunch length, which meet the requirements of the ring injection and the FEL operation simultaneously. The injector boosts the bunch energy to 100 MeV, which is mainly composed of a photocathode RF gun working at 2998 MHz, two solenoid coils for emittance compensation, and two 3-meter-long 2998 MHz traveling-wave (TW) accelerator units. Beam dynamics optimization of the photo-injector is presented in detail, which has been performed with multi-objective genetic algorithm (MOGA) combining theoretical analysis and ASTRA code. After optimization, the 95% projected transverse emittance has reached as low as 0.45 mm·mrad with an RMS bunch length of about 1.0 mm at a bunch charge of 1 nC.
	Poster MOPB035 [2.643 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-SAP2023-MOPB035
About •	Received ※ 28 June 2023 — Accepted ※ 11 July 2023 — Issued ※ 12 November 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Studies on Beam Injection System for Wuhan Advanced Light Source Storage Ring

73

Y. Zou, Y. Chen, J.H. He, H.H. Li
IAS, Wuhan City, People’s Republic of China

Wuhan Advanced Light Source is the low-energy 4th generation advanced light source, proposed by Wuhan University. It includes a 1.5 GeV of full-energy LINAC injector, a 180 m circumference of low-emittance storage ring, and a series of state-of-the-art beam lines. The standard 7BA magnetic focusing structure is adopted for the storage ring to lower the beam emittance and the lattice has been well- designed and optimized by multiple-objective genetic algorithm to maximize the dynamic aperture and energy acceptance. The dynamic aperture of the storage ring at injection can reach up to 10 mm in the horizontal plane, which makes the off-axis beam injection method possible. An off-axis beam injection scheme based on the pulsed nonlinear magnet is to be employed for the storage ring. Detailed studies about the beam injection scheme, including the beam optical design, nonlinear magnet design and optimization, have been performed and multi-particle simulations have also been carried out to study the beam injection procedure.

DOI •

reference for this paper ※ doi:10.18429/JACoW-SAP2023-MOPB031

About •

Received ※ 01 July 2023 — Revised ※ 08 July 2023 — Accepted ※ 11 July 2023 — Issued ※ 11 July 2023

Cite •

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

MOPB035

Beam Dynamics Study of a Photo-Injector at Wuhan Light Source

79

Z.Y. Dai, Y. Chen, J.B. Guan, J.H. He, Z. Hui, H.H. Li, L.X. Liu, Z.S. Liu, Y. Nie, J. Wang, J.H. Zhong, W. Zhou, Y. Zou
IAS, Wuhan City, People’s Republic of China
H.C. Shi
Zhejiang University, Institute for Fusion Theory and Simulation, Hangzhou, People’s Republic of China

A photo-injector is under development at Wuhan Light Source (WHLS) to provide beams for the 1.5 GeV storage ring proposed as a fourth-generation synchrotron radiation light source and a future free electron laser (FEL) facility. The photo-injector and the following LINAC will be able to produce electron beams with low emittance (<2 mm·mrad), high bunch charge (~1 nC), small energy spread (<0.5%) , and short bunch length, which meet the requirements of the ring injection and the FEL operation simultaneously. The injector boosts the bunch energy to 100 MeV, which is mainly composed of a photocathode RF gun working at 2998 MHz, two solenoid coils for emittance compensation, and two 3-meter-long 2998 MHz traveling-wave (TW) accelerator units. Beam dynamics optimization of the photo-injector is presented in detail, which has been performed with multi-objective genetic algorithm (MOGA) combining theoretical analysis and ASTRA code. After optimization, the 95% projected transverse emittance has reached as low as 0.45 mm·mrad with an RMS bunch length of about 1.0 mm at a bunch charge of 1 nC.

Poster MOPB035 [2.643 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-SAP2023-MOPB035

About •

Received ※ 28 June 2023 — Accepted ※ 11 July 2023 — Issued ※ 12 November 2023

Cite •

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