MEDSI2020 - List of Keywords (FEL)

Paper	Title	Other Keywords	Page
MOPC08	Compact X-Ray and Bremsstrahlung Collimator for LCLS-II	alignment, photon, interface, vacuum	68
	N.A. Boiadjieva, D.M. Fritz, T. Rabedeau SLAC, Menlo Park, California, USA
	Beam collimation is crucial to maintaining machine and personnel safety during LCLS-II operation. The high density of optics and beam transport components needed to steer the beam to multiple beam lines places a premium on compact collimator design. This presentation discusses a compact collimator consisting of an X-ray beam power collimator, a burn through monitor (BTM) designed to detect failure of the X-ray beam collimator, and a Bremsstrahlung collimator. The collimator body is a monolith machined from CuCrZr (C18150) that eliminates costly braze operations and reduces assembly time and complexity. Sintered high thermal conductivity SiC is employed as the X-ray absorber with design provisions incorporated to permit the inclusion of additional absorbers (e.g. diamond). The allowed FEL beam power is limited to 100W. Finite element analyses ensure that the power absorber remains in safe temperature and stress regimes under the maximum power loading and smallest expected beam dimensions. The beam power will be limited via credited controls placed on the electron beam. Beam containment requirements stipulate the inclusion of a monitor to detect burn through events owing to absorber failure. The BTM is a gas-filled, thin wall vessel which, if illuminated by the beam, will burn through and release the contained gas and trip pressure switches that initiate beam shutdown. The beam absorber and BTM shadow the Bremsstrahlung collimator shielding after appropriate propagation of manufacturing, assembly, and installation tolerances. Tooling is developed to minimize assembly complexity and ensure minimal alignment errors.
	Poster MOPC08 [0.950 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2020-MOPC08
About •	paper received ※ 21 July 2021 paper accepted ※ 13 October 2021 issue date ※ 08 November 2021
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUOA02	Conceptual Design of the Cavity Mechanical System for Cavity-Based X-Ray Free Electron Laser	cavity, vacuum, laser, electron	103
	D. Shu, J.W.J. Anton, L. Assoufid, W.G. Jansma, S.P. Kearney, K.-J. Kim, R.R. Lindberg, S.T. Mashrafi, X. Shi, Yu. Shvyd’ko, W.F. Toter, M. White ANL, Lemont, Illinois, USA H. Bassan, F.-J. Decker, G.L. Gassner, Z. Huang, G. Marcus, H.-D. Nuhn, T.-F. Tan, D. Zhu SLAC, Menlo Park, California, USA
	Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract DE-AC02-06CH1 1357 (ANL) and DE-AC02-76SF00515 (SLAC). The concept behind the cavity-based X-ray FELs (CBXFELs) such as the X-ray free-electron laser oscillator (XFELO)* and the X-ray regenerative amplifier free-electron laser (XRAFEL)** is to form an X-ray cavity with a set of narrow bandwidth diamond Bragg crystals. Storing and recirculating the output of an amplifier in an X- ray cavity so that the X-ray pulse can interact with following fresh electron bunches over many passes enables the development of full temporal coherence. One of the key challenges to forming the X-ray cavity is the precision of the cavity mechanical system design and construction. In this paper, we present conceptual design of the cavity mechanical system that is currently under development for use in a proof-of-principle cavity-based X-ray free electron laser experiment at the LCLS-II at SLAC. Kwang-Je Kim et al., TUPRB096, Proceedings of IPAC2019 *Gabe Marcus et al., TUD04, Proceedings of IPAC2019
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2020-TUOA02
About •	paper received ※ 02 August 2021 paper accepted ※ 05 October 2021 issue date ※ 30 October 2021
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEOA01	CAD Integration for PETRA-IV	lattice, interface, experiment, photon	215
	B. List, L. Hagge, M. Hüning, D. Miller, P.-O. Petersen DESY, Hamburg, Germany
	The PETRA-IV next-generation synchrotron radiation source planned at DESY is currently in preparation as successor of PETRA-III, with a completely new accelerator and a new experimental hall, while existing buildings, tunnels and experimental beamlines will be retained where possible. The Technical Design Report is due to be completed by the end of 2022. A CAD integration model has been set up for the complete accelerator and photon science complex. It combines the contributions of all relevant trades, the accelerator components, supply infrastructure, installations, frames, tunnels and buildings, and the design of the campus. The CAD model structure is aligned with the project’s part breakdown structure (PBS) and the Work Breakdown Structure (WBS) to facilitate integration with systems engineering and reflect responsibility within the project organization. Within the model, it is possible to switch between different levels of detail for space allocation (DG1 - "black box"), interface definition (DG2 - "grey box") and detailed design (DG3 - "white box"), separating layout from design, while ensuring their consistency. Placement of accelerator components is directly governed by the lattice through direct access to spreadsheet data, allowing fast design changes after a lattice update and ensuring consistency between mechanical and lattice design. The resulting model will support the complete facility lifecycle, from layout and design to fabrication, installation and operation. The presentation explains the tasks and requirements of the CAD integration process and uses examples to explain the structure and the modeling methodology of the CAD integration model.
	Slides WEOA01 [9.470 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2020-WEOA01
About •	paper received ※ 12 August 2021 paper accepted ※ 16 October 2021 issue date ※ 09 November 2021
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPC05	An Improved, Compact High Temperature Sample Furnace for X-Ray Powder Diffraction	laser, shielding, GUI, radiation	317
	E. Haas BNL, Upton, New York, USA E. Cardenas NYIT, Old Westbury, New York, USA A.P. Sirna SBU, Stony Brook, New York, USA
	A compact sample furnace was designed and tested at the X-ray Powder Diffraction (XPD) beamline at NSLS-II. This furnace is designed to heat small samples to temperatures of 2000 - 2300°C while allowing the XPD photon beam to pass through with adequate downstream opening in the furnace to collect diffraction data. Since the XPD samples did not reach the desired temperatures initially, engineering studies, tests, and incremental improvements were planned and undertaken to improve performance. The design of the sample furnace will be presented as background, and engineering details will be presented in this paper describing work undertaken to improve the furnace design to allow sample temperatures to reach 2000 - 2300°C or more.
	Poster WEPC05 [0.534 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2020-WEPC05
About •	paper received ※ 26 July 2021 paper accepted ※ 17 October 2021 issue date ※ 31 October 2021
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THOB02	Heat Load Simulation of Optic Materials at European XFEL	simulation, photon, synchrotron, operation	357
	F. Yang, D. La Civita, H. Sinn, M. Vannoni EuXFEL, Hamburg, Germany
	The European XFEL GmbH, located in Hamburg area in Germany, is the X-ray free electron laser light source which has been in the operation since 2017. It is designed to provide users high intensity X-ray beam with 27000 pulses/s repetition rate in the photon energy range from 0.5 to 25 keV. In the beam transport system, the optic components which have direct contact with the beam, e.g. mirror, absorber and beam shutter, etc., could get up to 10 kW heat load on a sub-mm spot in 0.6 ms. Therefore, the thermo-mechanical performance of these optic components is playing an important role in the safety operation of the facility, restricting the maximum allowed beam power delivered to each experiment station. In this contribution, using finite element simulation tools, a parametric study about coupled thermo-mechanical behavior of some general used materials, e.g. CVD diamond, B4C, silicon, etc. is presented. Based on the design of several devices which are already in operation at European XFEL, an initial damage threshold for these materials is established, with respect to the corresponding beam parameters. Furthermore, the relevant analytical and numerical solutions are discussed and compared, taking the material and geometrical nonlinearities into account. These simulation results can be referred as design and operation benchmark for the optic elements in the beamlines. Altarelli, M. et al., The XFEL Technical Design Report, 2006. **Tschentscher, Th. et al., Photon Beam Transport and Scientific Instruments at the European XFEL, Applied Sciences 7(6):592, 2017.
	Slides THOB02 [1.911 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2020-THOB02
About •	paper received ※ 21 July 2021 paper accepted ※ 28 September 2021 issue date ※ 29 October 2021
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOPC08

Compact X-Ray and Bremsstrahlung Collimator for LCLS-II

alignment, photon, interface, vacuum

68

N.A. Boiadjieva, D.M. Fritz, T. Rabedeau
SLAC, Menlo Park, California, USA

Beam collimation is crucial to maintaining machine and personnel safety during LCLS-II operation. The high density of optics and beam transport components needed to steer the beam to multiple beam lines places a premium on compact collimator design. This presentation discusses a compact collimator consisting of an X-ray beam power collimator, a burn through monitor (BTM) designed to detect failure of the X-ray beam collimator, and a Bremsstrahlung collimator. The collimator body is a monolith machined from CuCrZr (C18150) that eliminates costly braze operations and reduces assembly time and complexity. Sintered high thermal conductivity SiC is employed as the X-ray absorber with design provisions incorporated to permit the inclusion of additional absorbers (e.g. diamond). The allowed FEL beam power is limited to 100W. Finite element analyses ensure that the power absorber remains in safe temperature and stress regimes under the maximum power loading and smallest expected beam dimensions. The beam power will be limited via credited controls placed on the electron beam. Beam containment requirements stipulate the inclusion of a monitor to detect burn through events owing to absorber failure. The BTM is a gas-filled, thin wall vessel which, if illuminated by the beam, will burn through and release the contained gas and trip pressure switches that initiate beam shutdown. The beam absorber and BTM shadow the Bremsstrahlung collimator shielding after appropriate propagation of manufacturing, assembly, and installation tolerances. Tooling is developed to minimize assembly complexity and ensure minimal alignment errors.

Poster MOPC08 [0.950 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2020-MOPC08

About •

paper received ※ 21 July 2021 paper accepted ※ 13 October 2021 issue date ※ 08 November 2021

Export •

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

TUOA02

Conceptual Design of the Cavity Mechanical System for Cavity-Based X-Ray Free Electron Laser

cavity, vacuum, laser, electron

103

D. Shu, J.W.J. Anton, L. Assoufid, W.G. Jansma, S.P. Kearney, K.-J. Kim, R.R. Lindberg, S.T. Mashrafi, X. Shi, Yu. Shvyd’ko, W.F. Toter, M. White
ANL, Lemont, Illinois, USA
H. Bassan, F.-J. Decker, G.L. Gassner, Z. Huang, G. Marcus, H.-D. Nuhn, T.-F. Tan, D. Zhu
SLAC, Menlo Park, California, USA

Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract DE-AC02-06CH1 1357 (ANL) and DE-AC02-76SF00515 (SLAC).
The concept behind the cavity-based X-ray FELs (CBXFELs) such as the X-ray free-electron laser oscillator (XFELO)* and the X-ray regenerative amplifier free-electron laser (XRAFEL)** is to form an X-ray cavity with a set of narrow bandwidth diamond Bragg crystals. Storing and recirculating the output of an amplifier in an X- ray cavity so that the X-ray pulse can interact with following fresh electron bunches over many passes enables the development of full temporal coherence. One of the key challenges to forming the X-ray cavity is the precision of the cavity mechanical system design and construction. In this paper, we present conceptual design of the cavity mechanical system that is currently under development for use in a proof-of-principle cavity-based X-ray free electron laser experiment at the LCLS-II at SLAC.
*Kwang-Je Kim et al., TUPRB096, Proceedings of IPAC2019
**Gabe Marcus et al., TUD04, Proceedings of IPAC2019

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2020-TUOA02

About •

paper received ※ 02 August 2021 paper accepted ※ 05 October 2021 issue date ※ 30 October 2021

Export •

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

WEOA01

CAD Integration for PETRA-IV

lattice, interface, experiment, photon

215

B. List, L. Hagge, M. Hüning, D. Miller, P.-O. Petersen
DESY, Hamburg, Germany

The PETRA-IV next-generation synchrotron radiation source planned at DESY is currently in preparation as successor of PETRA-III, with a completely new accelerator and a new experimental hall, while existing buildings, tunnels and experimental beamlines will be retained where possible. The Technical Design Report is due to be completed by the end of 2022. A CAD integration model has been set up for the complete accelerator and photon science complex. It combines the contributions of all relevant trades, the accelerator components, supply infrastructure, installations, frames, tunnels and buildings, and the design of the campus. The CAD model structure is aligned with the project’s part breakdown structure (PBS) and the Work Breakdown Structure (WBS) to facilitate integration with systems engineering and reflect responsibility within the project organization. Within the model, it is possible to switch between different levels of detail for space allocation (DG1 - "black box"), interface definition (DG2 - "grey box") and detailed design (DG3 - "white box"), separating layout from design, while ensuring their consistency. Placement of accelerator components is directly governed by the lattice through direct access to spreadsheet data, allowing fast design changes after a lattice update and ensuring consistency between mechanical and lattice design. The resulting model will support the complete facility lifecycle, from layout and design to fabrication, installation and operation. The presentation explains the tasks and requirements of the CAD integration process and uses examples to explain the structure and the modeling methodology of the CAD integration model.

Slides WEOA01 [9.470 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2020-WEOA01

About •

paper received ※ 12 August 2021 paper accepted ※ 16 October 2021 issue date ※ 09 November 2021

Export •

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

WEPC05

An Improved, Compact High Temperature Sample Furnace for X-Ray Powder Diffraction

laser, shielding, GUI, radiation

317

E. Haas
BNL, Upton, New York, USA
E. Cardenas
NYIT, Old Westbury, New York, USA
A.P. Sirna
SBU, Stony Brook, New York, USA

A compact sample furnace was designed and tested at the X-ray Powder Diffraction (XPD) beamline at NSLS-II. This furnace is designed to heat small samples to temperatures of 2000 - 2300°C while allowing the XPD photon beam to pass through with adequate downstream opening in the furnace to collect diffraction data. Since the XPD samples did not reach the desired temperatures initially, engineering studies, tests, and incremental improvements were planned and undertaken to improve performance. The design of the sample furnace will be presented as background, and engineering details will be presented in this paper describing work undertaken to improve the furnace design to allow sample temperatures to reach 2000 - 2300°C or more.

Poster WEPC05 [0.534 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2020-WEPC05

About •

paper received ※ 26 July 2021 paper accepted ※ 17 October 2021 issue date ※ 31 October 2021

Export •

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

THOB02

Heat Load Simulation of Optic Materials at European XFEL

simulation, photon, synchrotron, operation

357

F. Yang, D. La Civita, H. Sinn, M. Vannoni
EuXFEL, Hamburg, Germany

The European XFEL GmbH, located in Hamburg area in Germany, is the X-ray free electron laser light source which has been in the operation since 2017. It is designed to provide users high intensity X-ray beam with 27000 pulses/s repetition rate in the photon energy range from 0.5 to 25 keV*. In the beam transport system, the optic components which have direct contact with the beam, e.g. mirror, absorber and beam shutter, etc., could get up to 10 kW heat load on a sub-mm spot in 0.6 ms. Therefore, the thermo-mechanical performance of these optic components is playing an important role in the safety operation of the facility, restricting the maximum allowed beam power delivered to each experiment station. In this contribution, using finite element simulation tools, a parametric study about coupled thermo-mechanical behavior of some general used materials, e.g. CVD diamond, B4C, silicon, etc. is presented. Based on the design of several devices which are already in operation at European XFEL**, an initial damage threshold for these materials is established, with respect to the corresponding beam parameters. Furthermore, the relevant analytical and numerical solutions are discussed and compared, taking the material and geometrical nonlinearities into account. These simulation results can be referred as design and operation benchmark for the optic elements in the beamlines.
*Altarelli, M. et al., The XFEL Technical Design Report, 2006.
**Tschentscher, Th. et al., Photon Beam Transport and Scientific Instruments at the European XFEL, Applied Sciences 7(6):592, 2017.

Slides THOB02 [1.911 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2020-THOB02

About •

paper received ※ 21 July 2021 paper accepted ※ 28 September 2021 issue date ※ 29 October 2021

Export •

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