MEDSI2023 - List of Authors (Luo, P.)

Paper	Title	Page
WEPPP015	Progress of Front Ends at HEPS	175
	H. Shi, P. Luo, Y.X. Ma, Y. Tan, H.Y. Wang IHEP, People’s Republic of China
	High Energy Photon Source (HEPS) is a 6GeV synchrotron radiation facility building in Huairou, with a storage ring perimeter of 1390.6m and 41 straight sections. In phase I, 15 front ends will be installed, including 14 insertion device front ends and 1 bending magnet front end. These front ends are divided into three types: the Undulator front end, the Wiggler front end, and the BM front end. The U-type front end will receive 766W/mrad² of peak power density and 25kW of the total power. The design of the W-type front end is based on compatibility with various insertion devices, including udulators and wigglers. In this paper, the designs and the progress of HEPS front ends are presented.
	Poster WEPPP015 [2.147 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP015
About •	Received ※ 01 November 2023 — Revised ※ 04 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 08 January 2024
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WEPPP020	A Photon Shutter with a Translational Switching Mechanism at HEPS
	P. Luo, Y.X. Ma, H. Shi, H.Y. Wang IHEP, People’s Republic of China
	Currently under construction on High Energy Photon Source (HEPS) is a 6GeV at 200mA¿4th Generation Synchrotron Light Source in Beijing. In order to meet all experimental light requirements for the three types of insertion devices of the hard X-ray imaging beamline at HEPS, a photon shutter that considers both large optical aperture and high heat load has been designed for the beamline Front-End. By designing a segmented surface with different grazing incidence angles, the power density of the incident surface irradiation is effectively reduced, while the length of the absorber is effectively shortened. The photon shutter can switch between open and closed states with a translational switching mechanism through a cylinder and a horizontal slide. And it can receive a maximum bam size of 25.2×22.7mm2 with handling a maximum total thermal power of up to 17.2kW and a peak power density of up to 652W/mm2. The structure of the photon shutter was introduced. Finally, the thermal analyses on the absorber of the photon shutter under various insertion operating modes was completed to verify its safety performance.
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WEPPP021	A Novel Design of Front End Slits for Hard X-Ray Imaging Beamline in High Energy Photon Source
	Y.X. Ma, P. Luo, H. Shi, H.Y. Wang IHEP, People’s Republic of China
	The Hard X-ray Imaging Beamline, being constructed at High Energy Photon Source (HEPS), will use three types of insertion devices in different operating modes, including CPMU, IAW73 and Mango Wiggler. Therefore, the front end of this beamline will receive synchrotron radiation with different distribution, including peak power density and receiving angle. To adequate diverse power distribution with a general geometry, a novel design of front end slits is development. Its absorbers are reasonably designed into segmented surfaces with different grazing angles according to the power density distribution of synchrotron radiation. Through this design, the slits can withstand thermal loads with a peak power density of 414kW/mrad2 and a maximum section of 30×30mm. Detailed thermal analyses of the absorbers under various operating modes are implemented to verify its safety performance under high heat loads. This new type of slits not only can adjust the aperture according to the needs of different operating modes, but also effectively shorten the length of the absorbers in the limited space of the front end.
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WEPPP023	Selection Calculation for the Absorbers of the Filter Equipment of HEPS
	H.Y. Wang, P. Luo, Y.X. Ma, H. Shi, J.L. Yang IHEP, People’s Republic of China
	The under-construction High Energy Photon Source is a fourth-generation synchrotron radiation source. It has two operation modes for its BF beamline station’s insertion devices and extremely high thermal loads. Therefore, it is necessary to use filters to modulate the energy and power of the beam. Filters can effectively absorb part of the thermal load in synchrotron radiation, thereby reducing the thermal load at downstream optical components or experimental samples. This article introduces the parameter design method of the absorbers in the filter, including material selection, thickness allocation, combination method of absorbers, and determination of the number of filter groups. A complete design process is obtained, and key factors affecting the use of filters are analyzed, providing a theoretical basis for the optimization design of the filter equipment. The filter designed using this method has been successfully applied to BF beamline of HEPS.
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Paper

Title

Page

Progress of Front Ends at HEPS

175

H. Shi, P. Luo, Y.X. Ma, Y. Tan, H.Y. Wang
IHEP, People’s Republic of China

High Energy Photon Source (HEPS) is a 6GeV synchrotron radiation facility building in Huairou, with a storage ring perimeter of 1390.6m and 41 straight sections. In phase I, 15 front ends will be installed, including 14 insertion device front ends and 1 bending magnet front end. These front ends are divided into three types: the Undulator front end, the Wiggler front end, and the BM front end. The U-type front end will receive 766W/mrad² of peak power density and 25kW of the total power. The design of the W-type front end is based on compatibility with various insertion devices, including udulators and wigglers. In this paper, the designs and the progress of HEPS front ends are presented.

Poster WEPPP015 [2.147 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-WEPPP015

About •

Received ※ 01 November 2023 — Revised ※ 04 November 2023 — Accepted ※ 09 November 2023 — Issued ※ 08 January 2024

Cite •

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

WEPPP020

A Photon Shutter with a Translational Switching Mechanism at HEPS

P. Luo, Y.X. Ma, H. Shi, H.Y. Wang
IHEP, People’s Republic of China

Currently under construction on High Energy Photon Source (HEPS) is a 6GeV at 200mA¿4th Generation Synchrotron Light Source in Beijing. In order to meet all experimental light requirements for the three types of insertion devices of the hard X-ray imaging beamline at HEPS, a photon shutter that considers both large optical aperture and high heat load has been designed for the beamline Front-End. By designing a segmented surface with different grazing incidence angles, the power density of the incident surface irradiation is effectively reduced, while the length of the absorber is effectively shortened. The photon shutter can switch between open and closed states with a translational switching mechanism through a cylinder and a horizontal slide. And it can receive a maximum bam size of 25.2×22.7mm2 with handling a maximum total thermal power of up to 17.2kW and a peak power density of up to 652W/mm2. The structure of the photon shutter was introduced. Finally, the thermal analyses on the absorber of the photon shutter under various insertion operating modes was completed to verify its safety performance.

Cite •

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

WEPPP021

A Novel Design of Front End Slits for Hard X-Ray Imaging Beamline in High Energy Photon Source

Y.X. Ma, P. Luo, H. Shi, H.Y. Wang
IHEP, People’s Republic of China

The Hard X-ray Imaging Beamline, being constructed at High Energy Photon Source (HEPS), will use three types of insertion devices in different operating modes, including CPMU, IAW73 and Mango Wiggler. Therefore, the front end of this beamline will receive synchrotron radiation with different distribution, including peak power density and receiving angle. To adequate diverse power distribution with a general geometry, a novel design of front end slits is development. Its absorbers are reasonably designed into segmented surfaces with different grazing angles according to the power density distribution of synchrotron radiation. Through this design, the slits can withstand thermal loads with a peak power density of 414kW/mrad2 and a maximum section of 30×30mm. Detailed thermal analyses of the absorbers under various operating modes are implemented to verify its safety performance under high heat loads. This new type of slits not only can adjust the aperture according to the needs of different operating modes, but also effectively shorten the length of the absorbers in the limited space of the front end.

Cite •

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

WEPPP023

Selection Calculation for the Absorbers of the Filter Equipment of HEPS

H.Y. Wang, P. Luo, Y.X. Ma, H. Shi, J.L. Yang
IHEP, People’s Republic of China

The under-construction High Energy Photon Source is a fourth-generation synchrotron radiation source. It has two operation modes for its BF beamline station’s insertion devices and extremely high thermal loads. Therefore, it is necessary to use filters to modulate the energy and power of the beam. Filters can effectively absorb part of the thermal load in synchrotron radiation, thereby reducing the thermal load at downstream optical components or experimental samples. This article introduces the parameter design method of the absorbers in the filter, including material selection, thickness allocation, combination method of absorbers, and determination of the number of filter groups. A complete design process is obtained, and key factors affecting the use of filters are analyzed, providing a theoretical basis for the optimization design of the filter equipment. The filter designed using this method has been successfully applied to BF beamline of HEPS.

Cite •

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