MEDSI2016 - Classification: Core Technology Developments / Others

Paper	Title	Page
TUPE26	Carbon-Steel/poliethylene Radiation Enclosures for the Sirius Beamlines	223
	L. Sanfelici, H.F. Canova, F.H. Cardoso, R. Madacki, M.A. Pereira, M.L. Roca Santo, L.G. Silva, M.S. Silva, J.E. dos Santos LNLS, Campinas, Brazil L. Buccianti, M.H.A. Costa, E. Palombarini Biotec Controle Ambiental, São José dos Campos, SP, Brazil C. Prudente Prudente Engenharia Ltda., Uberlândia, Minas Gerais, Brazil
	Funding: Brazilian Ministry of Science, Technology, Innovation and Communication Lead enclosures have been used over the past decades for radiation protection at mid and high-energy synchrotron light-sources, requiring nearly 10% of the investment needed to set up a new beamline. Due to the increasing concern about neutron levels, in part due to the reduction of the photon radiation levels with the increased thickness of the hutch walls, the existing constructive models were revisited and a new constructive approach based on Carbon-Steel (CS) and High-Density Polyethylene (HDPE) is proposed for the SIRIUS beamlines, leading to increased overall radiation protection and potentially lower cost. This work is going to show preliminary simulation results, cost-comparison, as well as a few mechanical design details and prototyping initiatives.
	Poster TUPE26 [2.930 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE26
About •	paper received ※ 09 September 2016 paper accepted ※ 21 September 2016 issue date ※ 22 June 2017
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPE27	A New Generation of X-ray Absorbers for the EBS Storage Ring
	E. Gagliardini, J.C. Biasci, D. Coulon, Y. Dabin, T. Ducoing, F. Ewald, P. Marion, F. Thomas ESRF, Grenoble, France
	The X-ray absorbers are essential components of the storage ring vacuum system. Their function is to protect the vacuum chambers from the high power density produced by the dipole magnets synchrotron radiation. In the EBS storage ring, the 430 kW total heatload will be stopped by 400 individual absorbers of twelve different types. In order to simplify their design and reduce their costs, a new material will be used (CuCr1Zr) associated with a novel design integrating the vacuum sealing flange in the CuCr1 absorber body and avoiding any brazed or welded junctions. This alloy, used for other applications (ITER-Fusion for Energy), offers an alternative to Glidcop with a very good compromise between thermal and mechanical characteristics. The exact location of each absorber is established through precise ray-tracing studies, which define the best place between the optical elements. The design of the absorbers will be described including technological aspects, together with the investigations on the CuCr1Zr material, the prototypes and tests carried out to validate the novel design choices.
	Poster TUPE27 [12.575 MB]
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPE28	Characterization of the Acoustic Field Generated by the Single-Axis Acoustic Levitator	226
	A. Chavan GIT/ECE, Atlanta, Georgia, USA A. DiChiara, P.D. Hartog, B. Hu, K.J. Suthar ANL, Argonne, Illinois, USA
	The acoustic levitator utilizes two transducers that emit acoustic waves. A standing wave is generated between the two transducers that allows for the levitation of particles at the nodes of the standing wave. These levitated particles experience an instability. In order to aid in the process of solving this instability, the acoustic field created by one of the transducers was characterized in this experiment. This characterization helps to understand the intensity of the acoustic field at different points throughout the region and how the acoustic wave diverges as it travels away from the transducer.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE28
About •	paper received ※ 10 September 2016 paper accepted ※ 21 September 2016 issue date ※ 22 June 2017
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEBA02	Minimization of Mechanical Constraint Effects of Eutectic GaIn as Thermal Interface
	L. Zhang, D. Cocco, J.H. James, N.M. Kelez, D.S. Morton SLAC, Menlo Park, California, USA
	Eutectic Gallium-Indium (eGaIn: 75% Gallium + 25 Indium) is widely used as the thermal interface in water-cooled X-ray optics. The thermal contact resistance of the eGaIn can be smaller than 0.1 mm2. K/W. The LCLS-II KB mirrors will be water cooled, and mostly dynamically bendable. The requirement on the bending accuracy can be expressed as residual slope error after the subtraction of the ideal ellipsoidal shape. This residual slope error should be smaller than 0.1rad, which is at least 4 orders of magnitude smaller than the mirror bent slope. Therefore, the mechanical constraint force from the eGaIn interface should be at least 4, and mostly 5 orders of magnitude smaller than the bending forces with the bending arm length comparable to the mirror length. But what is the mechanical constraint force of the eGaIn interface? What are the mechanical properties of the eGaIn in terms of Youngs or shear modulus. How should this eGaIn interface optimized, for instance the thickness of this interface? In this paper, we will present experimental studies conducted at SLAC to answer these questions, and propose a solution to minimize the constraint forces of the eGaIn.
	Slides WEBA02 [6.677 MB]
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEBA03	Recent Progress on the Design of High-Heat-Load Components	277
	S.K. Sharma, C. Amundsen, F.A. DePaola, F.C. Lincoln, J.L. Tuozzolo BNL, Upton, Long Island, New York, USA
	A new design was recently proposed for the high power masks and slits of the front-ends at the 2014 MEDSI Conference. The main features of the new design are integrated knife edges in high conductivity copper alloys, interception of the photon beam only on horizontal surfaces, replacing Glidcop® with readily available CuCrZr, and thermal optimization with internal fins. Numerous components based on this design have been built for NSLS-II front-ends and some of the design features have been incorporated into other high-heat-load components such as beamline masks and crotch absorbers. In this paper we describe recent progress at NSLS-II in further advancing this design approach by FE analysis, fabrication and testing.
	Slides WEBA03 [4.523 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEBA03
About •	paper received ※ 09 September 2016 paper accepted ※ 16 September 2016 issue date ※ 22 June 2017
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEBA04	A Discussion on Utilization of Heat Pipes and Vapour Chamber Technology as a Primary Device for Heat Extraction from Photon Absorber Surfaces	280
	K.J. Suthar, P.K. Den Hartog, A.M. Lurie ANL, Argonne, Illinois, USA
	Funding: This research used resources of the APS, a U.S. Department of Energy Office of Science User Facility operated by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. The basic problem for photon absorbers in a particle accelerator is to remove a large quantity of heat from a small space. Heat pipes and vapor chambers excel at precisely this so it is natural to consider them for the application. However, even though this technology has been proven to be an excellent thermal management solution for cooling everything from laptops to satellite shields in space, they have yet to be adopted for use in particle accelerators. The use of heat pipes and vapor chambers are thermal transport devices which work on the principle of capillary-force-driven two-phase flow. These devices are highly customizable and offer very high effective thermal conductivities (5,000-200, 000 W/m/K) depending on many factors including size, shape, and orientation. This paper discusses feasibility of the use of heat pipes and vapor chambers as the primary heat transport devices in particle accelerator photon absorbers. We discuss their limitations and advantages via careful consideration of analysis and simulation results assuming properties described in the literature and manufacturer specifications.
	Slides WEBA04 [3.263 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEBA04
About •	paper received ※ 10 September 2016 paper accepted ※ 15 September 2016 issue date ※ 22 June 2017
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Carbon-Steel/poliethylene Radiation Enclosures for the Sirius Beamlines

223

L. Sanfelici, H.F. Canova, F.H. Cardoso, R. Madacki, M.A. Pereira, M.L. Roca Santo, L.G. Silva, M.S. Silva, J.E. dos Santos
LNLS, Campinas, Brazil
L. Buccianti, M.H.A. Costa, E. Palombarini
Biotec Controle Ambiental, São José dos Campos, SP, Brazil
C. Prudente
Prudente Engenharia Ltda., Uberlândia, Minas Gerais, Brazil

Funding: Brazilian Ministry of Science, Technology, Innovation and Communication
Lead enclosures have been used over the past decades for radiation protection at mid and high-energy synchrotron light-sources, requiring nearly 10% of the investment needed to set up a new beamline. Due to the increasing concern about neutron levels, in part due to the reduction of the photon radiation levels with the increased thickness of the hutch walls, the existing constructive models were revisited and a new constructive approach based on Carbon-Steel (CS) and High-Density Polyethylene (HDPE) is proposed for the SIRIUS beamlines, leading to increased overall radiation protection and potentially lower cost. This work is going to show preliminary simulation results, cost-comparison, as well as a few mechanical design details and prototyping initiatives.

Poster TUPE26 [2.930 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE26

About •

paper received ※ 09 September 2016 paper accepted ※ 21 September 2016 issue date ※ 22 June 2017

Export •

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

TUPE27

A New Generation of X-ray Absorbers for the EBS Storage Ring

E. Gagliardini, J.C. Biasci, D. Coulon, Y. Dabin, T. Ducoing, F. Ewald, P. Marion, F. Thomas
ESRF, Grenoble, France

The X-ray absorbers are essential components of the storage ring vacuum system. Their function is to protect the vacuum chambers from the high power density produced by the dipole magnets synchrotron radiation. In the EBS storage ring, the 430 kW total heatload will be stopped by 400 individual absorbers of twelve different types. In order to simplify their design and reduce their costs, a new material will be used (CuCr1Zr) associated with a novel design integrating the vacuum sealing flange in the CuCr1 absorber body and avoiding any brazed or welded junctions. This alloy, used for other applications (ITER-Fusion for Energy), offers an alternative to Glidcop with a very good compromise between thermal and mechanical characteristics. The exact location of each absorber is established through precise ray-tracing studies, which define the best place between the optical elements. The design of the absorbers will be described including technological aspects, together with the investigations on the CuCr1Zr material, the prototypes and tests carried out to validate the novel design choices.

Poster TUPE27 [12.575 MB]

Export •

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

TUPE28

Characterization of the Acoustic Field Generated by the Single-Axis Acoustic Levitator

226

A. Chavan
GIT/ECE, Atlanta, Georgia, USA
A. DiChiara, P.D. Hartog, B. Hu, K.J. Suthar
ANL, Argonne, Illinois, USA

The acoustic levitator utilizes two transducers that emit acoustic waves. A standing wave is generated between the two transducers that allows for the levitation of particles at the nodes of the standing wave. These levitated particles experience an instability. In order to aid in the process of solving this instability, the acoustic field created by one of the transducers was characterized in this experiment. This characterization helps to understand the intensity of the acoustic field at different points throughout the region and how the acoustic wave diverges as it travels away from the transducer.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE28

About •

paper received ※ 10 September 2016 paper accepted ※ 21 September 2016 issue date ※ 22 June 2017

Export •

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

WEBA02

Minimization of Mechanical Constraint Effects of Eutectic GaIn as Thermal Interface

L. Zhang, D. Cocco, J.H. James, N.M. Kelez, D.S. Morton
SLAC, Menlo Park, California, USA

Eutectic Gallium-Indium (eGaIn: 75% Gallium + 25 Indium) is widely used as the thermal interface in water-cooled X-ray optics. The thermal contact resistance of the eGaIn can be smaller than 0.1 mm2. K/W. The LCLS-II KB mirrors will be water cooled, and mostly dynamically bendable. The requirement on the bending accuracy can be expressed as residual slope error after the subtraction of the ideal ellipsoidal shape. This residual slope error should be smaller than 0.1rad, which is at least 4 orders of magnitude smaller than the mirror bent slope. Therefore, the mechanical constraint force from the eGaIn interface should be at least 4, and mostly 5 orders of magnitude smaller than the bending forces with the bending arm length comparable to the mirror length. But what is the mechanical constraint force of the eGaIn interface? What are the mechanical properties of the eGaIn in terms of Youngs or shear modulus. How should this eGaIn interface optimized, for instance the thickness of this interface? In this paper, we will present experimental studies conducted at SLAC to answer these questions, and propose a solution to minimize the constraint forces of the eGaIn.

Slides WEBA02 [6.677 MB]

Export •

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

WEBA03

Recent Progress on the Design of High-Heat-Load Components

277

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

A new design was recently proposed for the high power masks and slits of the front-ends at the 2014 MEDSI Conference. The main features of the new design are integrated knife edges in high conductivity copper alloys, interception of the photon beam only on horizontal surfaces, replacing Glidcop® with readily available CuCrZr, and thermal optimization with internal fins. Numerous components based on this design have been built for NSLS-II front-ends and some of the design features have been incorporated into other high-heat-load components such as beamline masks and crotch absorbers. In this paper we describe recent progress at NSLS-II in further advancing this design approach by FE analysis, fabrication and testing.

Slides WEBA03 [4.523 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEBA03

About •

paper received ※ 09 September 2016 paper accepted ※ 16 September 2016 issue date ※ 22 June 2017

Export •

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

WEBA04

A Discussion on Utilization of Heat Pipes and Vapour Chamber Technology as a Primary Device for Heat Extraction from Photon Absorber Surfaces

280

K.J. Suthar, P.K. Den Hartog, A.M. Lurie
ANL, Argonne, Illinois, USA

Funding: This research used resources of the APS, a U.S. Department of Energy Office of Science User Facility operated by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.
The basic problem for photon absorbers in a particle accelerator is to remove a large quantity of heat from a small space. Heat pipes and vapor chambers excel at precisely this so it is natural to consider them for the application. However, even though this technology has been proven to be an excellent thermal management solution for cooling everything from laptops to satellite shields in space, they have yet to be adopted for use in particle accelerators. The use of heat pipes and vapor chambers are thermal transport devices which work on the principle of capillary-force-driven two-phase flow. These devices are highly customizable and offer very high effective thermal conductivities (5,000-200, 000 W/m/K) depending on many factors including size, shape, and orientation. This paper discusses feasibility of the use of heat pipes and vapor chambers as the primary heat transport devices in particle accelerator photon absorbers. We discuss their limitations and advantages via careful consideration of analysis and simulation results assuming properties described in the literature and manufacturer specifications.

Slides WEBA04 [3.263 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEBA04

About •

paper received ※ 10 September 2016 paper accepted ※ 15 September 2016 issue date ※ 22 June 2017

Export •

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