MEDSI2018 - Classification: Beamlines / Front Ends

Paper	Title	Page
WEPH38	Mechanical Design and Construction of the Coherent X-ray Scattering Beamline at Taiwan Photon Source	286
	H.Y. Yan, C.Y. Chang, C.H. Chang, S.H. Chang, C.Y. Chen, C.C. Chiu, L. Huang, Y.-S. Huang, L. Lee, J.M. Lin, D.G. Liu NSRRC, Hsinchu, Taiwan
	The Coherent X-ray Scattering (CXS) beamline at Taiwan Photon Source has been completely constructed in the end of 2015 and opened for users in the next half year of 2016 successfully. Two In-vacuum Undulators (IU22) with lengths of 3 m and 2 m were used as the Insertion Device (ID) to provide intense synchrotron radiation for the CXS beamline. To achieve the coherent performance, the setup of components in the beamline needs to be considered and designed carefully. As no white-beam diamond window was installed in the upstream beamline for the maintenance of coherent beam, a differential pumping mechanism was evaluated to prevent the worse vacuum condition influencing the front end and the storage ring. A single-crystal diamond filter was also adopted to maintain the coherence of x-ray. The protection of bremsstrahlung radiation for this beamline was designed specifically based on the optical layout. This paper will introduce the detailed mechanical design and current status for the CXS beamline.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH38
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WEPH39	Validation Results for Sirius APU19 Front End Prototype	290
	H.G.P. de Oliveira, L.C. Arruda, C.S.N.C. Bueno, H.F. Canova, P.T. Fonseca, G.L.M.P. Rodrigues, L. Sanfelici, L.M. Volpe LNLS, Campinas, Brazil
	Funding: Ministry of Science, Technology, Innovation and Communication (MCTIC) A Front End (FE) prototype for a 19-mm period length Adjustable Phase Undulator (APU19) beamline of the new Brazilian 4th-generation synchrotron, Sirius, was assembled in the LNLS metrology building in January 2017 to validate main design concepts. Regarding stability, flow-induced vibration (FIV) investigations were carried out on the water-cooled components, and modal analyses were made on the X-Ray Beam Position Monitor (XBPM) support. As for the vacuum system, final pressure levels were investigated and a vacuum breach was intentionally provoked to verify the performance of the equipment protection system (EPS). In addition, cycling tests of the Photon and Gamma shutters were conducted to verify the FE reliability. Moreover, the three-layer protection system, developed to limit the maximum aperture for the high-power slits, was functionally evaluated. Finally, the results were used to improve the FE to its final design. This paper describes the tests setups and results obtained during the validations.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH39
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THPH03	The XBPM Project at MAX IV Frontends, Overview and First Results	340
	A. Bartalesi MAX IV Laboratory, Lund University, Lund, Sweden
	All the frontends installed on the 3GeV storage ring at MAX IV are equipped with two X-Ray Beam Position Monitors. Having recently finished the installation of the acquisition system, it was possible to record and analyse data. This presentation describes the setup and shows the first results.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH03
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THPH08	Develop Standard Components for TPS Beamline
	C.Y. Chang, C.F. Chang, C.H. Chang, S.H. Chang, H.W. Chen, C.C. Chiu, L. Huang, L. Lee, M.H. Lee, C.Y.L. Liu, H.Y. Yan NSRRC, Hsinchu, Taiwan
	The beamline group is actively doing two new projects. One project is developing of standardization and modularization beamline components for the Taiwan Photon Source (TPS) and Taiwan Light Source (TLS) beamlines. The components including the high heat load masks, white/mono beam slits, phosphor screens type beam monitor system, beam shutters, common chambers, and support tables/stands, are selected as the standards so far. Many advanced concepts and materials are applied for the developing components to improve their stability and reliability. The other project is planning to design a monitor and control system for the beamline components. Some EPICS compatible instruments are being partially tested and will be applied to the new beamlines at TPS.[1-3] The log of beamline status for all beamlines will be recorded and stored in an archive. The purpose of these projects will save not only the cost but also the manpower on construction for several beamlines in time.
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THPH11	LCLS-II FEL Photon Collimators Design	358
	S. Forcat Oller, Y. Feng, J. Krzywiński, E. Ortiz, M. Rowen, H. Wang SLAC, Menlo Park, California, USA
	The unique capabilities of LCLS, the world's first hard X-ray FEL, have had significant impact on advancing our understanding across a broad range of science. LCLS-II, a major upgrade of LCLS, is being developed as a high-repetition rate X-ray laser with two simultaneously operating FELs. It features a 4 GeV continuous wave superconducting Linac capable of producing ultrafast X-ray laser pulses at a repetition rate up to 1 MHz and energy range from 0.25 to 5 keV. The LCLS-II upgrade is an enormous engineering challenge not only on the accelerator side but also for safety, machine protection devices and diagnostic units. A major part of the beam containment is covered by the FEL beam collimators. The current collimator design is no longer suitable for the high power densities of the upcoming LCLS-II beam. Therefore, a complete new design has been conceived to satisfy this new constrains. Moreover, a special FEL miss-steering detection system based on a photo diodes array has been designed as an integral part of the photon collimator as additional safety feature. This poster describes the new LCLS-II FEL Collimators, their mechanical design and challenges encountered.
	Poster THPH11 [1.164 MB]
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THPH24	Front End Designs for the Advanced Photon Source Multi-bend Achromats Upgrade	388
	Y. Jaski, M. Abliz, J.S. Downey, S.H. Lee, J. Mulvey, S.M. Oprondek, M. Ramanathan, F. Westferro, B.X. Yang ANL, Argonne, Illinois, USA
	Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357 The Advanced Photon Source (APS) upgrade from double-bend achromats (DBA) to multi-bend achromats (MBA) lattice is underway. This upgrade will change the storage ring energy from 7 GeV to 6 GeV and beam current from 100 mA to 200 mA. All front ends must be upgraded to fulfill the following requirements: 1) Include a clearing magnet in all front ends to deflect and dump any electrons in case the electrons escape from the storage ring during swap-out injection with the safety shutters open, 2) Incorporate the next generation x-ray beam position monitors (XBPMs) into the front ends to meet the new stringent beam stability requirements, 3) For insertion device (ID) front ends, handle the high heat load from two undulators in either inline or canted configuration. The upgraded APS ID front ends will only have two types: High Heat Load Front End (HHLFE) for single beam and Canted Undulator Front End (CUFE) for canted beam. This paper presents the final design of the HHLFE and preliminary design of the CUFE.
	Poster THPH24 [1.279 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH24
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THPH25	The MLS-IDB: A Versatile Beamline for UV to Soft X-Ray Surface Analytics
	H.K. Kaser, A. Gottwald, M. Kolbe PTB, Berlin, Germany
	The PTB operates its own electron storage ring MLS [1] in Berlin. Utilizing the radiation from a U125 undulator, an IDB delivers high flux with high spectral purity from 4.4 nm to 800 nm. The undulator radiation is monochromatized by a normal incidence-grazing incidence (NI-GI) hybrid plane grating monochromator. Different coatings are used to cover the whole wavelength range. The beamline is optimized to suppress false light contributions and to allow a high reliability of the monitoring of the radiation intensity. Thus, it can provide quantitative photon num-bers for traceable measurements. Currently, MLS-IDB is mainly used for investigations of interfaces and nanostructures by various experimental techniques, such as photoelectron spectroscopy [2,3,4] as well as spectroscopic ellipsometry [5]. The investigations of the relation between the optical properties and the inner structure of selected samples provide further information about promising materials in the semiconductor as well as photovoltaic research and manufacturing. Furthermore, a sample preparation chamber with modular design has been recently put into operation. [1] DOI:10.1088/0026-1394/49/2/S146 [2] DOI:10.1016/j.elspec.2017.05.008 [3] DOI:10.1038/ncomms9287 [4] DOI:10.1088/0957-4484/27/32/324005 [5] DOI:10.1063/1.4878919
	Poster THPH25 [3.940 MB]
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THPH41	Frontend Slits for Closely-Spaced Wiggler Beams	424
	S.K. Sharma, C. Amundsen, F.A. DePaola, J.L. Tuozzolo BNL, Upton, Long Island, New York, USA
	A high energy x-ray (HEX) beamline facility will be constructed at NSLS-II for R&D in energy storage tech-nologies using different x-ray imaging techniques. A 4.3 Tesla superconducting wiggler will be used to produced x-rays of total power of approximately 56 kW in 8 keV ' 200 keV range. The nominal horizontal fan of ~ 10 mrad will be split into three closely spaced beams of 0.2 mrad, 1.0 mrad and 0.2 mrad fans. Each beam is required to have a frontend slit with four distinct apertures. The conventional L-shape design of the slit is not feasible for these closely spaced beams because of constraints on side cooling and horizontal travel of the slits. In this paper we propose two solutions for these slits using a beam pass-through design, vertical-only travel and optimized cooling configurations.
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THPH42	The Design of HEPS Front Ends
	H. Shi, L. Gao, M. Li IHEP, Beijing, People's Republic of China
	High Energy Photon Source (HEPS) is a 6GeV synchrotron radiation facility to be built in Huairou, Beijing, with a perimeter of 1390.6m and 48 linear sections. In the first phase, 15 front ends will be installed, including 14 ID front ends and 1 BM front end. These front ends are divided into three categories: the standard undulator front end, the wiggler front end, and the BM front end. The peak power density that the front end bears is about 868kW/mrad², the total power is about 47kW. This paper describes the general layout design of the three different types of front end, the functions of the main components, and the finite element analysis of key devices in the HEPS front end.
	Poster THPH42 [0.657 MB]
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Paper

Title

Page

Mechanical Design and Construction of the Coherent X-ray Scattering Beamline at Taiwan Photon Source

286

H.Y. Yan, C.Y. Chang, C.H. Chang, S.H. Chang, C.Y. Chen, C.C. Chiu, L. Huang, Y.-S. Huang, L. Lee, J.M. Lin, D.G. Liu
NSRRC, Hsinchu, Taiwan

The Coherent X-ray Scattering (CXS) beamline at Taiwan Photon Source has been completely constructed in the end of 2015 and opened for users in the next half year of 2016 successfully. Two In-vacuum Undulators (IU22) with lengths of 3 m and 2 m were used as the Insertion Device (ID) to provide intense synchrotron radiation for the CXS beamline. To achieve the coherent performance, the setup of components in the beamline needs to be considered and designed carefully. As no white-beam diamond window was installed in the upstream beamline for the maintenance of coherent beam, a differential pumping mechanism was evaluated to prevent the worse vacuum condition influencing the front end and the storage ring. A single-crystal diamond filter was also adopted to maintain the coherence of x-ray. The protection of bremsstrahlung radiation for this beamline was designed specifically based on the optical layout. This paper will introduce the detailed mechanical design and current status for the CXS beamline.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH38

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WEPH39

Validation Results for Sirius APU19 Front End Prototype

290

H.G.P. de Oliveira, L.C. Arruda, C.S.N.C. Bueno, H.F. Canova, P.T. Fonseca, G.L.M.P. Rodrigues, L. Sanfelici, L.M. Volpe
LNLS, Campinas, Brazil

Funding: Ministry of Science, Technology, Innovation and Communication (MCTIC)
A Front End (FE) prototype for a 19-mm period length Adjustable Phase Undulator (APU19) beamline of the new Brazilian 4th-generation synchrotron, Sirius, was assembled in the LNLS metrology building in January 2017 to validate main design concepts. Regarding stability, flow-induced vibration (FIV) investigations were carried out on the water-cooled components, and modal analyses were made on the X-Ray Beam Position Monitor (XBPM) support. As for the vacuum system, final pressure levels were investigated and a vacuum breach was intentionally provoked to verify the performance of the equipment protection system (EPS). In addition, cycling tests of the Photon and Gamma shutters were conducted to verify the FE reliability. Moreover, the three-layer protection system, developed to limit the maximum aperture for the high-power slits, was functionally evaluated. Finally, the results were used to improve the FE to its final design. This paper describes the tests setups and results obtained during the validations.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH39

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THPH03

The XBPM Project at MAX IV Frontends, Overview and First Results

340

A. Bartalesi
MAX IV Laboratory, Lund University, Lund, Sweden

All the frontends installed on the 3GeV storage ring at MAX IV are equipped with two X-Ray Beam Position Monitors. Having recently finished the installation of the acquisition system, it was possible to record and analyse data. This presentation describes the setup and shows the first results.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH03

Export •

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

THPH08

Develop Standard Components for TPS Beamline

C.Y. Chang, C.F. Chang, C.H. Chang, S.H. Chang, H.W. Chen, C.C. Chiu, L. Huang, L. Lee, M.H. Lee, C.Y.L. Liu, H.Y. Yan
NSRRC, Hsinchu, Taiwan

The beamline group is actively doing two new projects. One project is developing of standardization and modularization beamline components for the Taiwan Photon Source (TPS) and Taiwan Light Source (TLS) beamlines. The components including the high heat load masks, white/mono beam slits, phosphor screens type beam monitor system, beam shutters, common chambers, and support tables/stands, are selected as the standards so far. Many advanced concepts and materials are applied for the developing components to improve their stability and reliability. The other project is planning to design a monitor and control system for the beamline components. Some EPICS compatible instruments are being partially tested and will be applied to the new beamlines at TPS.[1-3] The log of beamline status for all beamlines will be recorded and stored in an archive. The purpose of these projects will save not only the cost but also the manpower on construction for several beamlines in time.

Export •

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

THPH11

LCLS-II FEL Photon Collimators Design

358

S. Forcat Oller, Y. Feng, J. Krzywiński, E. Ortiz, M. Rowen, H. Wang
SLAC, Menlo Park, California, USA

The unique capabilities of LCLS, the world's first hard X-ray FEL, have had significant impact on advancing our understanding across a broad range of science. LCLS-II, a major upgrade of LCLS, is being developed as a high-repetition rate X-ray laser with two simultaneously operating FELs. It features a 4 GeV continuous wave superconducting Linac capable of producing ultrafast X-ray laser pulses at a repetition rate up to 1 MHz and energy range from 0.25 to 5 keV. The LCLS-II upgrade is an enormous engineering challenge not only on the accelerator side but also for safety, machine protection devices and diagnostic units. A major part of the beam containment is covered by the FEL beam collimators. The current collimator design is no longer suitable for the high power densities of the upcoming LCLS-II beam. Therefore, a complete new design has been conceived to satisfy this new constrains. Moreover, a special FEL miss-steering detection system based on a photo diodes array has been designed as an integral part of the photon collimator as additional safety feature. This poster describes the new LCLS-II FEL Collimators, their mechanical design and challenges encountered.

Poster THPH11 [1.164 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH11

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

THPH24

Front End Designs for the Advanced Photon Source Multi-bend Achromats Upgrade

388

Y. Jaski, M. Abliz, J.S. Downey, S.H. Lee, J. Mulvey, S.M. Oprondek, M. Ramanathan, F. Westferro, B.X. Yang
ANL, Argonne, Illinois, USA

Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357
The Advanced Photon Source (APS) upgrade from double-bend achromats (DBA) to multi-bend achromats (MBA) lattice is underway. This upgrade will change the storage ring energy from 7 GeV to 6 GeV and beam current from 100 mA to 200 mA. All front ends must be upgraded to fulfill the following requirements: 1) Include a clearing magnet in all front ends to deflect and dump any electrons in case the electrons escape from the storage ring during swap-out injection with the safety shutters open, 2) Incorporate the next generation x-ray beam position monitors (XBPMs) into the front ends to meet the new stringent beam stability requirements, 3) For insertion device (ID) front ends, handle the high heat load from two undulators in either inline or canted configuration. The upgraded APS ID front ends will only have two types: High Heat Load Front End (HHLFE) for single beam and Canted Undulator Front End (CUFE) for canted beam. This paper presents the final design of the HHLFE and preliminary design of the CUFE.

Poster THPH24 [1.279 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH24

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THPH25

The MLS-IDB: A Versatile Beamline for UV to Soft X-Ray Surface Analytics

H.K. Kaser, A. Gottwald, M. Kolbe
PTB, Berlin, Germany

The PTB operates its own electron storage ring MLS [1] in Berlin. Utilizing the radiation from a U125 undulator, an IDB delivers high flux with high spectral purity from 4.4 nm to 800 nm. The undulator radiation is monochromatized by a normal incidence-grazing incidence (NI-GI) hybrid plane grating monochromator. Different coatings are used to cover the whole wavelength range. The beamline is optimized to suppress false light contributions and to allow a high reliability of the monitoring of the radiation intensity. Thus, it can provide quantitative photon num-bers for traceable measurements. Currently, MLS-IDB is mainly used for investigations of interfaces and nanostructures by various experimental techniques, such as photoelectron spectroscopy [2,3,4] as well as spectroscopic ellipsometry [5]. The investigations of the relation between the optical properties and the inner structure of selected samples provide further information about promising materials in the semiconductor as well as photovoltaic research and manufacturing. Furthermore, a sample preparation chamber with modular design has been recently put into operation.
[1] DOI:10.1088/0026-1394/49/2/S146
[2] DOI:10.1016/j.elspec.2017.05.008
[3] DOI:10.1038/ncomms9287
[4] DOI:10.1088/0957-4484/27/32/324005
[5] DOI:10.1063/1.4878919

Poster THPH25 [3.940 MB]

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THPH41

Frontend Slits for Closely-Spaced Wiggler Beams

424

S.K. Sharma, C. Amundsen, F.A. DePaola, J.L. Tuozzolo
BNL, Upton, Long Island, New York, USA

A high energy x-ray (HEX) beamline facility will be constructed at NSLS-II for R&D in energy storage tech-nologies using different x-ray imaging techniques. A 4.3 Tesla superconducting wiggler will be used to produced x-rays of total power of approximately 56 kW in 8 keV ' 200 keV range. The nominal horizontal fan of ~ 10 mrad will be split into three closely spaced beams of 0.2 mrad, 1.0 mrad and 0.2 mrad fans. Each beam is required to have a frontend slit with four distinct apertures. The conventional L-shape design of the slit is not feasible for these closely spaced beams because of constraints on side cooling and horizontal travel of the slits. In this paper we propose two solutions for these slits using a beam pass-through design, vertical-only travel and optimized cooling configurations.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-THPH41

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THPH42

The Design of HEPS Front Ends

H. Shi, L. Gao, M. Li
IHEP, Beijing, People's Republic of China

High Energy Photon Source (HEPS) is a 6GeV synchrotron radiation facility to be built in Huairou, Beijing, with a perimeter of 1390.6m and 48 linear sections. In the first phase, 15 front ends will be installed, including 14 ID front ends and 1 BM front end. These front ends are divided into three categories: the standard undulator front end, the wiggler front end, and the BM front end. The peak power density that the front end bears is about 868kW/mrad², the total power is about 47kW. This paper describes the general layout design of the three different types of front end, the functions of the main components, and the finite element analysis of key devices in the HEPS front end.

Poster THPH42 [0.657 MB]

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