MEDSI2023 - List of Keywords (brightness)

Paper	Title	Other Keywords	Page
TUPYP043	The Design of Test Beamline at HEPS	experiment, photon, wiggler, undulator	90
	J.L. Yang, Q.J. Jia, M. Li, P. Liu, Y. Tao IHEP, People’s Republic of China
	This paper describes the design of a test beamline for a new generation of high-energy, high-flux, and high-coherence SR beamlines. The beamline will be built at ID42 of HEPS. The beamline includes two sources, a wiggler and an undulator, to provide high-energy, high thermal power, large size, and high-coherence, high-brightness X-ray beams, respectively. In the current design, the beamline mainly has optical components such as monochromators, CRLs, and filters. With different combinations of sources and optical components, the beamline can provide various modes, including white, monochromatic, and focused beam. Using a Si111 DCM, the beamline covers a wide photon energy range from 5 to 45 keV. In the future, the beamline will be capable of providing monochromatic beam with photon energy over 300 keV. The wiggler’s white beam can provide high thermal load test conditions over 1 kW. The beamline offers high flexibility and versatility in terms of available beam size (from micrometers to over 100 mm), energy resolution, and photon flux range. Various experimental techniques including diffraction, spectroscopy, imaging, and at-wavelength measurement can be performed on this beamline.
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP043
About •	Received ※ 08 November 2023 — Revised ※ 09 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 18 April 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPPP007	Optimizing Indirect Cooling of a High Accuracy Surface Plane Mirror in Plane-Grating Monochromator	synchrotron, optics, SRF, ECR	280
	J. Chen, X.W. Du, M.H. Lin, Q.P. Wang, Z. Wang USTC/NSRL, Hefei, Anhui, People’s Republic of China
	Funding: This work is supported by the Chinese Academy of Science (CAS) and the Anhui province government for key techniques R&D of Hefei Advanced Light Facility. For the cooling of the plane mirror in VIA-PGMs (var-iable-included-angle plane-grating monochromators), the top-side indirect cooling based on water is preferred for its advantages, such as cheaper, easier to use, smart notches, etc, when compared to the internal cooling. But it also arises challenges to control the RMS residual slope error of the mirror, whose requirement is less than 100 nano-radian. This requirement is even hard to fulfill, when combined with 1) the asymmetry thermal defor-mation on the meridian of the footprint area during the energy scanning, 2) the high heat load deduced by the synchrotron light and 3) the no obvious effects of the classical optimizations, such as increasing footprint size, cooling efficiency or adding smart notches. An effective way was found after numerous attempts, which is to make the footprint area far from the mirror¿s edge to reduce the asymmetry of the thermal deformation except for leading to a longer mirror. This paper will illustrate how the asymmetry affects the mirror¿s residual slope error and then, focus on the relationship among the asymmetry of cooling and the distance to provide a ref-erence for optical cooling.
	Poster THPPP007 [1.805 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP007
About •	Received ※ 26 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 04 March 2024
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

TUPYP043

The Design of Test Beamline at HEPS

experiment, photon, wiggler, undulator

90

J.L. Yang, Q.J. Jia, M. Li, P. Liu, Y. Tao
IHEP, People’s Republic of China

This paper describes the design of a test beamline for a new generation of high-energy, high-flux, and high-coherence SR beamlines. The beamline will be built at ID42 of HEPS. The beamline includes two sources, a wiggler and an undulator, to provide high-energy, high thermal power, large size, and high-coherence, high-brightness X-ray beams, respectively. In the current design, the beamline mainly has optical components such as monochromators, CRLs, and filters. With different combinations of sources and optical components, the beamline can provide various modes, including white, monochromatic, and focused beam. Using a Si111 DCM, the beamline covers a wide photon energy range from 5 to 45 keV. In the future, the beamline will be capable of providing monochromatic beam with photon energy over 300 keV. The wiggler’s white beam can provide high thermal load test conditions over 1 kW. The beamline offers high flexibility and versatility in terms of available beam size (from micrometers to over 100 mm), energy resolution, and photon flux range. Various experimental techniques including diffraction, spectroscopy, imaging, and at-wavelength measurement can be performed on this beamline.

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-TUPYP043

About •

Received ※ 08 November 2023 — Revised ※ 09 November 2023 — Accepted ※ 10 November 2023 — Issued ※ 18 April 2024

Cite •

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

THPPP007

Optimizing Indirect Cooling of a High Accuracy Surface Plane Mirror in Plane-Grating Monochromator

synchrotron, optics, SRF, ECR

280

J. Chen, X.W. Du, M.H. Lin, Q.P. Wang, Z. Wang
USTC/NSRL, Hefei, Anhui, People’s Republic of China

Funding: This work is supported by the Chinese Academy of Science (CAS) and the Anhui province government for key techniques R&D of Hefei Advanced Light Facility.
For the cooling of the plane mirror in VIA-PGMs (var-iable-included-angle plane-grating monochromators), the top-side indirect cooling based on water is preferred for its advantages, such as cheaper, easier to use, smart notches, etc, when compared to the internal cooling. But it also arises challenges to control the RMS residual slope error of the mirror, whose requirement is less than 100 nano-radian. This requirement is even hard to fulfill, when combined with 1) the asymmetry thermal defor-mation on the meridian of the footprint area during the energy scanning, 2) the high heat load deduced by the synchrotron light and 3) the no obvious effects of the classical optimizations, such as increasing footprint size, cooling efficiency or adding smart notches. An effective way was found after numerous attempts, which is to make the footprint area far from the mirror¿s edge to reduce the asymmetry of the thermal deformation except for leading to a longer mirror. This paper will illustrate how the asymmetry affects the mirror¿s residual slope error and then, focus on the relationship among the asymmetry of cooling and the distance to provide a ref-erence for optical cooling.

Poster THPPP007 [1.805 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-MEDSI2023-THPPP007

About •

Received ※ 26 October 2023 — Revised ※ 06 November 2023 — Accepted ※ 08 November 2023 — Issued ※ 04 March 2024

Cite •

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