MEDSI2016 - List of Keywords (operation)

Paper	Title	Other Keywords	Page
MOPE07	Ground Motions Measurements for Synchrotron	ion, ground-motion, experiment, synchrotron	15
	D.T. Ziemianski CUT, Kraków, Poland M.P. Nowak Solaris, Kraków, Poland
	For more than two decades, ground vibration measurements were made by different teams for feasibility studies of linear accelerators. Recent measurements were performed in the SPS tunnel and at different CERN sites on the surface. The devices to measure vibrations of magnitude ranging in nanometres, the analysis techniques and the results are critically discussed and compared with the former measurements. The implication of the measured integrated R.M.S. displacements for the Crab cavities cavern is mentioned. The equipment used in this study consists of 2 state-of-the-art Guralp broadband triaxial seismometers. Models CMG-T60-0004 performed measurements in three directions V, N/S and E/W. The first analysis was to evaluate the power spectral density for each direction of sensors and event. The power spectral density is calculated from the auto power spectrum. The power spectral density shows a typical curve for the geophones with theμseismic peak between 0.2 and 0.4 [Hz]. It is import ant to point that ground vibrations should not be ignored in planning accelerator facility. Actually it is one of the limiting factor in the optimization of future accelerators.
	Poster MOPE07 [4.968 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE07
About •	paper received ※ 09 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)

MOPE16	Development of the RIXS Manipulator	ion, vacuum, scattering	35
	H. Jöhri, C. Hess, L. Nue, L. Patthey, T. Schmitt PSI, Villigen PSI, Switzerland
	The RIXS Manipulator (RIXS = Resonant Inelastic X-ray Scattering) is a further development of the Carving Manipulator. The carving manipulator has six independent degree of freedom. (Three translations and three rotations). All three rotations are exactly in the middle of the sample surface. The head of the manipulator is in UHV and the sample can be cooled down to 10K. For the RIXS manipulator there is a new requirement to have a field of view from 0-180°. There are mainly two parts in the carving manipulator that set the probe in the shadow of the beam at small angles. - A bellow - The bearings To solve these problems we shifted the bellow behind the pivot point. This give some strange movements of the bellows and we had to analyse this in a separate test installation. For the bearings, we developed a goniometer bearing with ceramic bearing shells. Meanwhile the RIXS manipulator is implemented and in routine operation
	Poster MOPE16 [1.357 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE16
About •	paper received ※ 09 September 2016 paper accepted ※ 14 September 2016 issue date ※ 22 June 2017
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPE26	Front End Photon Shutter Water Leak to Vacuum at the Canadian Light Source	ion, photon, vacuum, cavity	60
	G.R. Henneberg, M.J.P. Adam, G.R. Barkway CLS, Saskatoon, Saskatchewan, Canada
	In early July 2016 CLS experienced a water to vacuum leak in the storage ring. The source of the leak was a pin hole in the absorbing surface of Photon Shutter 1 in the front end of the HXMA Beamline. The leak was caused by high velocity cooling water erosion of the internal cooling water path of the copper photon shutter block. The poster will present the root cause analysis of the leak, implications for other identical photon shutters and currently in service and the current remedial action plan.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE26
About •	paper received ※ 11 September 2016 paper accepted ※ 23 September 2016 issue date ※ 22 June 2017
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MOPE42	Experimental and Numerical Study of the ALBA LINAC Cooling System	ion, linac, experiment, cavity	102
	M. Ferrater UPC, Barcelona, Spain J.J. Casas, C. Colldelram, D. Lanaia, R. Muñoz Horta, F. Pérez, M. Quispe ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
	This work investigates experimentally and numerically the performance of the ALBA LINAC cooling system. The main objective is to enhance the hydraulic system in order to significantly improve its thermal and water flow stability. In normal operation some problems have been identified that affect the performance of the LINAC: flowrate below the nominal values and water flow decreasing in time. The cooling subsystems have been experimentally characterized in terms of the pressure drop and flowrate. The measurements were taken using a portable hydraulic unit made at ALBA as well as a set of ultrasonic flowmeters. For the numerical studies the cooling network has been simulated using the software Pipe Flow Expert. The experimental results have shown that a number of components are too restrictive. In some cases the possibility to increase the flowrate is limited. The numerical results show that the velocity magnitude is inadequate in some places, producing air bubble entrapment, high pressure drop at pipes and insufficient flow. Based on this study several modifications are presented in order to raise the nominal flow and to adequate the water flow velocities between 0.5 and 3 m/s.
	Poster MOPE42 [1.073 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE42
About •	paper received ※ 09 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)

MOPE43	Hydraulic Failure Caused by Air in Pipelines of the Experimental Area Ring of ALBA Synchrotron Light Source: Research, Simulations and Solutions	ion, experiment, controls, simulation	105
	L. Macià UPC, Barcelona, Spain J.J. Casas, C. Colldelram, M. Quispe ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
	After five years in operation of the ALBA Synchrotron Light Source a hydraulic failure caused a maximum decreasing of water flow about 40% of its nominal value, hampering the refrigeration of the local components. The problem was mainly caused by the air accumulated in pipes due to very low velocities of water flow. A literature review was conducted about the minimum water flow velocity for removing air in pipelines as design criteria. The aim of this work is to develop hydraulic solutions in order to achieve the minimum flowrate in pipelines of the Experimental Area (EA) ring. In the short term it is proposed to install a controlled bypass in the EA. A numerical simulation using the software Pipe Flow Expert has been implemented in order to determine the requirements of the bypass that works under different conditions to assure a minimum flowrate all along the ring. The velocity map in EA ring is simulated for different scenarios: 180 and 360 degrees distribution for both clockwise and anticlockwise rotation. For the long term a design of pipes with variable cross section is proposed which optimizes the flow velocity magnitude in EA ring in agreement with the design criteria.
	Poster MOPE43 [1.347 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE43
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)

TUCA03	Estimation of the Temperature Fluctuations Harshness Regarding Stability of Structures in the Nanometer Range	ion, experiment, ECR, simulation	133
	N. Jobert, F. Alves, S.K. Kubsky SOLEIL, Gif-sur-Yvette, France
	Thermally induced distortions are a key contributor to the overall positional and pointing performance of high-stability systems. Though stability scales with temperature fluctuations, there is some hidden complexity is the subject. Firstly, not all temperature oscillations will distort the structure: fast variations will hardly propagate into the structure, little change in overall dimensions but primarily pointing errors. Conversely, slow variations will result in quasi uniform temperature fields that change dimensions, hence mainly positional errors. Secondly, there is randomness in temperature fluctuations which obscures the actual severity of a given environment: randomness occurs timewise, but also space-wise. For highly stable situations, random part of the temperature field becomes prominent, and discarding this component becomes questionable. No harshness indicator exists that could help quantifying the actual severity of a given thermal environment. It is the objective of this paper to provide some insight on the matter, and propose a simple yet efficient numerical method allowing the evaluation of actual structural response to any realistic thermal environment.
	Slides TUCA03 [7.080 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUCA03
About •	paper received ※ 01 September 2016 paper accepted ※ 20 September 2016 issue date ※ 22 June 2017
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPE01	DMM Thermal Mechanical Design	ion, optics, detector, experiment	152
	J.H. Kelly DLS, Oxfordshire, United Kingdom
	A Double Multilayer Monochromator (DMM) was designed in-house for the VMXi beamline. Thermal mechanical finite element analysis was performed to design a novel optic geometry, employing In/Ga eutectic cooling. The integration of a DMM into the existing beamline required additional power management components, such as a low energy power filter, a power detector and compact CuCrZr masks. This paper describes the thermal management challenges and their solutions. The DMM has been fully commissioned and is operational within the original I02 beamline.
	Poster TUPE01 [6.566 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE01
About •	paper received ※ 08 September 2016 paper accepted ※ 20 September 2016 issue date ※ 22 June 2017
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPE05	Numerical Simulation of the ALBA Synchrotron Light Source Cooling System Response for Failure Prevention	ion, ECR, simulation, synchrotron	162
	X. Escaler UPC, Barcelona, Spain J.J. Casas, C. Colldelram, M. Prieto, M. Quispe ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
	The ALBA Synchrotron Light Source cooling system is designed with a common return pipe that interconnects the four consumption rings. Such configuration is believed to compromise its optimal operation. To understand its thermo-fluid dynamic behaviour, a detailed 1D model has been built comprising all the components such as the pipes, fittings, bends, valves, pumping stations, heat exchangers and so on, and the various regulation mechanisms. Preliminarily, the model results in steady state operating conditions have been compared with experimental measurements and the maximum deviations have been found below 13%. Then, a series of transient numerical simulations have been carried out to determine the system response. Specifically, effects of the blockage and leakage of a consumption line as well as the increase and decrease of heat duty for the tunnel rings have been investigated. As a result, the stability of the system has been evaluated and the operational limits have been estimated in front of hydraulic and thermal load variations. Moreover, particular behaviors have been identified which can be used to design monitoring and control strategies to prevent unexpected failures.
	Poster TUPE05 [0.615 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE05
About •	paper received ※ 07 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)

TUPE21	CLSI BMIT’s Super-Conducting Wiggler Cryogenic Safety Improvements*	ion, wiggler, cryogenics, vacuum	209
	L.X. Lin, T.W. Wysokinski CLS, Saskatoon, Saskatchewan, Canada
	4.1 T superconducting (SC) wiggler on CLS Biomedical Imaging and Therapy (BMIT) beamline [1-4] developed a critical problem in the cryogenic safety relief and refill paths. Ice blockage formed and prevented helium gas from relieving during liquid helium (LHe) refill. This resulted in an internal pressure built up, which caused expelling of the LHe and cold gas helium (GHe) from the wiggler cryostat. Several improvements were performed over the years including replacement of the original rupture disk, the pressure relief valves and installation of metal O-ring seals at external ports. Following these improvements, a major upgrade on the wiggler safety relief path was implemented by adding a new vent pipe directly connected to the cryostat for safety exhaust. The LHe refill path was also modified to eliminate possibility of ice blockage. During initial tests after the up-grades, we experienced significant heat load increase which was linked to the thermal acoustic oscillations in the LHe transfer line. The problem was resolved by improving the insulation vacuum in the transfer line and adding a super insulation assembly into the direct vent pipe along with a plug at the refill path. *Work supported by Budker Institute of Nuclear Physics under contract No. C60109-029 ¿ Linda. Lin@lightsource.ca
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE21
About •	paper received ※ 08 September 2016 paper accepted ※ 22 September 2016 issue date ※ 22 June 2017
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TUPE23	Glidcop Brazing in Sirius’ High Heat Load Front-End Components	ion, vacuum, synchrotron, photon	216
	G.V. Claudiano, O.R. Bagnato, P.T. Fonseca, F.R. Francisco, R.L. Parise, L.M. Volpe LNLS, Campinas, Brazil
	Sirius is a 4th generation synchrotron light source in project. Some of Sirius’ beamlines will have a very high power density, more than 50 kW/mrad², to be dissipated in components that have a limited space condition. Thus, the refrigeration of these components is complex when one has in mind that the coolant flow cannot be too turbulent in order to not induce much vibration in the components. Oxygen Free Electrolytic Cu (OFEC) has been replaced by the Glidcop, on 4th generation synchrotron applications, due to its good thermal conductivity and preservation of mechanical properties after heating cycles. However, as this material is not very workable in terms of union with other materials, which led to the development of a brazing process for Glidcop and stainless steel union. Glidcop samples were submitted to a Cu-electroplating process and a silver base alloy (BVAg-8) was used to join the parts in a high vacuum furnace. Electroplating was used to improve the filler metal wettability. The results were very satisfactory, ensuring water and vacuum tightness. A desirable characteristic not yet proved is the virtual leak property. This paper will discourse about this brazing method.
	Poster TUPE23 [1.553 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE23
About •	paper received ※ 09 September 2016 paper accepted ※ 22 September 2016 issue date ※ 22 June 2017
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TUPE31	Manufacturing of Photon Beam-Intercepting Components from CuCrZr	ion, vacuum, photon, synchrotron	233
	F.A. DePaola, C. Amundsen, S.K. Sharma BNL, Upton, Long Island, New York, USA
	Photon beam-intercepting components in synchrotron light sources have usually been made as water-cooled Glidcop bodies brazed to stainless steel conflate flanges. This fabrication method involves many manufacturing steps which result in increased cost, long procurement time and lower manufacturing reliability. A new design approach was recently proposed which simplifies fabrication by eliminating brazing and utilizes a readily available copper alloy, CuCrZr. This paper describes the manufacturing experience gained at NSLS-II from fabricating many components of this new design. Results of an investigation of various techniques for joining CuCrZr to itself and to SS304 and AL-6061 are also presented.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE31
About •	paper received ※ 09 September 2016 paper accepted ※ 15 September 2016 issue date ※ 22 June 2017
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WEPE01	Combined Fixed Mask, Photon Shutter, Safety Shutter, and Collimator Design for BXDS IVU at the CLS	ion, radiation, photon, vacuum	309
	M.J.P. Adam, C. Bodnarchuk CLS, Saskatoon, Saskatchewan, Canada
	Funding: Canadian Foundation for Innovation The first shutter assembly outside of the Front End (FE) for Brockhouse X-Ray Diffraction and Scattering Sector (BXDS) beamline required a unique design solution to accommodate all components into required safety shutter position. Located between the IVW high energy wiggler monochromator and POE1 wall, the total envelope size approximated 1m x 0.660m (LxW). Accommodating a smaller space required an alternative shutter design than traditionally used implemented at the CLS. The alternative proposed design combined the collimator (CLM), safety shutter (SSH), photon shutter (PSH) and Fixed Mask (FM) into one chamber. Finite Element Analysis (FEA) was conducted on the FM and PSH assembly to verify that geometric designs were adequate for reasonable operation in the beamline. FEA was used to determine the steady-state thermal and static-structural response in both operating positions. Missteer was analyzed for both operating positions to a maximum of 2.5mm (commonly accepted missteer used at the CLS) from center. Finally, two extreme position (5mm) analyses were completed for determination of potential, but unlikely operating conditions.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE01
About •	paper received ※ 11 September 2016 paper accepted ※ 21 September 2016 issue date ※ 22 June 2017
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WEPE22	F-Switch: Novel ’Random Access’ Manipulator for Large Numbers of Compound Refractive Lenses	ion, vacuum, FEL, alignment	345
	G.M.A. Duller, D.R. Hall, A. Stallwood DLS, Oxfordshire, United Kingdom
	The F-Switch is a new concept of device for the manipu-lation of large arrays of 2D CRLs or similar disc-shaped optical elements (12mm dia, 2mm thick) under high vac-uum. Unlike the well-known transfocator devices the optical elements are randomly selectable. This enables a number of potential modes of operation, including the fine adjustment of focal length by adjusting the effective lens centre position when using CRLs or the use of some positions within the array to implement filters or reference foils. Actuation and guidance is achieved within the thickness of the element, so that the overall length of the device is minimised. The device has been in user operation on the I04 MX beamline at Diamond Light Source (DLS) since 2015. Another device is being assembled for use on the I11 beamline at DLS. It is also hoped to install another device on the I03 beamline. We present details of the mechanical design of the F-Switch and some examples of its operation.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE22
About •	paper received ※ 10 September 2016 paper accepted ※ 21 September 2016 issue date ※ 22 June 2017
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Paper

Title

Other Keywords

Page

MOPE07

Ground Motions Measurements for Synchrotron

ion, ground-motion, experiment, synchrotron

15

D.T. Ziemianski
CUT, Kraków, Poland
M.P. Nowak
Solaris, Kraków, Poland

For more than two decades, ground vibration measurements were made by different teams for feasibility studies of linear accelerators. Recent measurements were performed in the SPS tunnel and at different CERN sites on the surface. The devices to measure vibrations of magnitude ranging in nanometres, the analysis techniques and the results are critically discussed and compared with the former measurements. The implication of the measured integrated R.M.S. displacements for the Crab cavities cavern is mentioned. The equipment used in this study consists of 2 state-of-the-art Guralp broadband triaxial seismometers. Models CMG-T60-0004 performed measurements in three directions V, N/S and E/W. The first analysis was to evaluate the power spectral density for each direction of sensors and event. The power spectral density is calculated from the auto power spectrum. The power spectral density shows a typical curve for the geophones with theμseismic peak between 0.2 and 0.4 [Hz]. It is import ant to point that ground vibrations should not be ignored in planning accelerator facility. Actually it is one of the limiting factor in the optimization of future accelerators.

Poster MOPE07 [4.968 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE07

About •

paper received ※ 09 September 2016 paper accepted ※ 15 September 2016 issue date ※ 22 June 2017

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MOPE16

Development of the RIXS Manipulator

ion, vacuum, scattering

35

H. Jöhri, C. Hess, L. Nue, L. Patthey, T. Schmitt
PSI, Villigen PSI, Switzerland

The RIXS Manipulator (RIXS = Resonant Inelastic X-ray Scattering) is a further development of the Carving Manipulator. The carving manipulator has six independent degree of freedom. (Three translations and three rotations). All three rotations are exactly in the middle of the sample surface. The head of the manipulator is in UHV and the sample can be cooled down to 10K. For the RIXS manipulator there is a new requirement to have a field of view from 0-180°. There are mainly two parts in the carving manipulator that set the probe in the shadow of the beam at small angles. - A bellow - The bearings To solve these problems we shifted the bellow behind the pivot point. This give some strange movements of the bellows and we had to analyse this in a separate test installation. For the bearings, we developed a goniometer bearing with ceramic bearing shells. Meanwhile the RIXS manipulator is implemented and in routine operation

Poster MOPE16 [1.357 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE16

About •

paper received ※ 09 September 2016 paper accepted ※ 14 September 2016 issue date ※ 22 June 2017

Export •

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

MOPE26

Front End Photon Shutter Water Leak to Vacuum at the Canadian Light Source

ion, photon, vacuum, cavity

60

G.R. Henneberg, M.J.P. Adam, G.R. Barkway
CLS, Saskatoon, Saskatchewan, Canada

In early July 2016 CLS experienced a water to vacuum leak in the storage ring. The source of the leak was a pin hole in the absorbing surface of Photon Shutter 1 in the front end of the HXMA Beamline. The leak was caused by high velocity cooling water erosion of the internal cooling water path of the copper photon shutter block. The poster will present the root cause analysis of the leak, implications for other identical photon shutters and currently in service and the current remedial action plan.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE26

About •

paper received ※ 11 September 2016 paper accepted ※ 23 September 2016 issue date ※ 22 June 2017

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MOPE42

Experimental and Numerical Study of the ALBA LINAC Cooling System

ion, linac, experiment, cavity

102

M. Ferrater
UPC, Barcelona, Spain
J.J. Casas, C. Colldelram, D. Lanaia, R. Muñoz Horta, F. Pérez, M. Quispe
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain

This work investigates experimentally and numerically the performance of the ALBA LINAC cooling system. The main objective is to enhance the hydraulic system in order to significantly improve its thermal and water flow stability. In normal operation some problems have been identified that affect the performance of the LINAC: flowrate below the nominal values and water flow decreasing in time. The cooling subsystems have been experimentally characterized in terms of the pressure drop and flowrate. The measurements were taken using a portable hydraulic unit made at ALBA as well as a set of ultrasonic flowmeters. For the numerical studies the cooling network has been simulated using the software Pipe Flow Expert. The experimental results have shown that a number of components are too restrictive. In some cases the possibility to increase the flowrate is limited. The numerical results show that the velocity magnitude is inadequate in some places, producing air bubble entrapment, high pressure drop at pipes and insufficient flow. Based on this study several modifications are presented in order to raise the nominal flow and to adequate the water flow velocities between 0.5 and 3 m/s.

Poster MOPE42 [1.073 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE42

About •

paper received ※ 09 September 2016 paper accepted ※ 15 September 2016 issue date ※ 22 June 2017

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

MOPE43

Hydraulic Failure Caused by Air in Pipelines of the Experimental Area Ring of ALBA Synchrotron Light Source: Research, Simulations and Solutions

ion, experiment, controls, simulation

105

L. Macià
UPC, Barcelona, Spain
J.J. Casas, C. Colldelram, M. Quispe
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain

After five years in operation of the ALBA Synchrotron Light Source a hydraulic failure caused a maximum decreasing of water flow about 40% of its nominal value, hampering the refrigeration of the local components. The problem was mainly caused by the air accumulated in pipes due to very low velocities of water flow. A literature review was conducted about the minimum water flow velocity for removing air in pipelines as design criteria. The aim of this work is to develop hydraulic solutions in order to achieve the minimum flowrate in pipelines of the Experimental Area (EA) ring. In the short term it is proposed to install a controlled bypass in the EA. A numerical simulation using the software Pipe Flow Expert has been implemented in order to determine the requirements of the bypass that works under different conditions to assure a minimum flowrate all along the ring. The velocity map in EA ring is simulated for different scenarios: 180 and 360 degrees distribution for both clockwise and anticlockwise rotation. For the long term a design of pipes with variable cross section is proposed which optimizes the flow velocity magnitude in EA ring in agreement with the design criteria.

Poster MOPE43 [1.347 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE43

About •

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

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

TUCA03

Estimation of the Temperature Fluctuations Harshness Regarding Stability of Structures in the Nanometer Range

ion, experiment, ECR, simulation

133

N. Jobert, F. Alves, S.K. Kubsky
SOLEIL, Gif-sur-Yvette, France

Thermally induced distortions are a key contributor to the overall positional and pointing performance of high-stability systems. Though stability scales with temperature fluctuations, there is some hidden complexity is the subject. Firstly, not all temperature oscillations will distort the structure: fast variations will hardly propagate into the structure, little change in overall dimensions but primarily pointing errors. Conversely, slow variations will result in quasi uniform temperature fields that change dimensions, hence mainly positional errors. Secondly, there is randomness in temperature fluctuations which obscures the actual severity of a given environment: randomness occurs timewise, but also space-wise. For highly stable situations, random part of the temperature field becomes prominent, and discarding this component becomes questionable. No harshness indicator exists that could help quantifying the actual severity of a given thermal environment. It is the objective of this paper to provide some insight on the matter, and propose a simple yet efficient numerical method allowing the evaluation of actual structural response to any realistic thermal environment.

Slides TUCA03 [7.080 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUCA03

About •

paper received ※ 01 September 2016 paper accepted ※ 20 September 2016 issue date ※ 22 June 2017

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

TUPE01

DMM Thermal Mechanical Design

ion, optics, detector, experiment

152

J.H. Kelly
DLS, Oxfordshire, United Kingdom

A Double Multilayer Monochromator (DMM) was designed in-house for the VMXi beamline. Thermal mechanical finite element analysis was performed to design a novel optic geometry, employing In/Ga eutectic cooling. The integration of a DMM into the existing beamline required additional power management components, such as a low energy power filter, a power detector and compact CuCrZr masks. This paper describes the thermal management challenges and their solutions. The DMM has been fully commissioned and is operational within the original I02 beamline.

Poster TUPE01 [6.566 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE01

About •

paper received ※ 08 September 2016 paper accepted ※ 20 September 2016 issue date ※ 22 June 2017

Export •

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

TUPE05

Numerical Simulation of the ALBA Synchrotron Light Source Cooling System Response for Failure Prevention

ion, ECR, simulation, synchrotron

162

X. Escaler
UPC, Barcelona, Spain
J.J. Casas, C. Colldelram, M. Prieto, M. Quispe
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain

The ALBA Synchrotron Light Source cooling system is designed with a common return pipe that interconnects the four consumption rings. Such configuration is believed to compromise its optimal operation. To understand its thermo-fluid dynamic behaviour, a detailed 1D model has been built comprising all the components such as the pipes, fittings, bends, valves, pumping stations, heat exchangers and so on, and the various regulation mechanisms. Preliminarily, the model results in steady state operating conditions have been compared with experimental measurements and the maximum deviations have been found below 13%. Then, a series of transient numerical simulations have been carried out to determine the system response. Specifically, effects of the blockage and leakage of a consumption line as well as the increase and decrease of heat duty for the tunnel rings have been investigated. As a result, the stability of the system has been evaluated and the operational limits have been estimated in front of hydraulic and thermal load variations. Moreover, particular behaviors have been identified which can be used to design monitoring and control strategies to prevent unexpected failures.

Poster TUPE05 [0.615 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE05

About •

paper received ※ 07 September 2016 paper accepted ※ 21 September 2016 issue date ※ 22 June 2017

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TUPE21

CLSI BMIT’s Super-Conducting Wiggler Cryogenic Safety Improvements*

ion, wiggler, cryogenics, vacuum

209

L.X. Lin, T.W. Wysokinski
CLS, Saskatoon, Saskatchewan, Canada

4.1 T superconducting (SC) wiggler on CLS Biomedical Imaging and Therapy (BMIT) beamline [1-4] developed a critical problem in the cryogenic safety relief and refill paths. Ice blockage formed and prevented helium gas from relieving during liquid helium (LHe) refill. This resulted in an internal pressure built up, which caused expelling of the LHe and cold gas helium (GHe) from the wiggler cryostat. Several improvements were performed over the years including replacement of the original rupture disk, the pressure relief valves and installation of metal O-ring seals at external ports. Following these improvements, a major upgrade on the wiggler safety relief path was implemented by adding a new vent pipe directly connected to the cryostat for safety exhaust. The LHe refill path was also modified to eliminate possibility of ice blockage. During initial tests after the up-grades, we experienced significant heat load increase which was linked to the thermal acoustic oscillations in the LHe transfer line. The problem was resolved by improving the insulation vacuum in the transfer line and adding a super insulation assembly into the direct vent pipe along with a plug at the refill path.
*Work supported by Budker Institute of Nuclear Physics under contract No. C60109-029
¿ Linda. Lin@lightsource.ca

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE21

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paper received ※ 08 September 2016 paper accepted ※ 22 September 2016 issue date ※ 22 June 2017

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TUPE23

Glidcop Brazing in Sirius’ High Heat Load Front-End Components

ion, vacuum, synchrotron, photon

216

G.V. Claudiano, O.R. Bagnato, P.T. Fonseca, F.R. Francisco, R.L. Parise, L.M. Volpe
LNLS, Campinas, Brazil

Sirius is a 4th generation synchrotron light source in project. Some of Sirius’ beamlines will have a very high power density, more than 50 kW/mrad², to be dissipated in components that have a limited space condition. Thus, the refrigeration of these components is complex when one has in mind that the coolant flow cannot be too turbulent in order to not induce much vibration in the components. Oxygen Free Electrolytic Cu (OFEC) has been replaced by the Glidcop, on 4th generation synchrotron applications, due to its good thermal conductivity and preservation of mechanical properties after heating cycles. However, as this material is not very workable in terms of union with other materials, which led to the development of a brazing process for Glidcop and stainless steel union. Glidcop samples were submitted to a Cu-electroplating process and a silver base alloy (BVAg-8) was used to join the parts in a high vacuum furnace. Electroplating was used to improve the filler metal wettability. The results were very satisfactory, ensuring water and vacuum tightness. A desirable characteristic not yet proved is the virtual leak property. This paper will discourse about this brazing method.

Poster TUPE23 [1.553 MB]

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE23

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

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TUPE31

Manufacturing of Photon Beam-Intercepting Components from CuCrZr

ion, vacuum, photon, synchrotron

233

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

Photon beam-intercepting components in synchrotron light sources have usually been made as water-cooled Glidcop bodies brazed to stainless steel conflate flanges. This fabrication method involves many manufacturing steps which result in increased cost, long procurement time and lower manufacturing reliability. A new design approach was recently proposed which simplifies fabrication by eliminating brazing and utilizes a readily available copper alloy, CuCrZr. This paper describes the manufacturing experience gained at NSLS-II from fabricating many components of this new design. Results of an investigation of various techniques for joining CuCrZr to itself and to SS304 and AL-6061 are also presented.

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE31

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paper received ※ 09 September 2016 paper accepted ※ 15 September 2016 issue date ※ 22 June 2017

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WEPE01

Combined Fixed Mask, Photon Shutter, Safety Shutter, and Collimator Design for BXDS IVU at the CLS

ion, radiation, photon, vacuum

309

M.J.P. Adam, C. Bodnarchuk
CLS, Saskatoon, Saskatchewan, Canada

Funding: Canadian Foundation for Innovation
The first shutter assembly outside of the Front End (FE) for Brockhouse X-Ray Diffraction and Scattering Sector (BXDS) beamline required a unique design solution to accommodate all components into required safety shutter position. Located between the IVW high energy wiggler monochromator and POE1 wall, the total envelope size approximated 1m x 0.660m (LxW). Accommodating a smaller space required an alternative shutter design than traditionally used implemented at the CLS. The alternative proposed design combined the collimator (CLM), safety shutter (SSH), photon shutter (PSH) and Fixed Mask (FM) into one chamber. Finite Element Analysis (FEA) was conducted on the FM and PSH assembly to verify that geometric designs were adequate for reasonable operation in the beamline. FEA was used to determine the steady-state thermal and static-structural response in both operating positions. Missteer was analyzed for both operating positions to a maximum of 2.5mm (commonly accepted missteer used at the CLS) from center. Finally, two extreme position (5mm) analyses were completed for determination of potential, but unlikely operating conditions.

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE01

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paper received ※ 11 September 2016 paper accepted ※ 21 September 2016 issue date ※ 22 June 2017

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WEPE22

F-Switch: Novel ’Random Access’ Manipulator for Large Numbers of Compound Refractive Lenses

ion, vacuum, FEL, alignment

345

G.M.A. Duller, D.R. Hall, A. Stallwood
DLS, Oxfordshire, United Kingdom

The F-Switch is a new concept of device for the manipu-lation of large arrays of 2D CRLs or similar disc-shaped optical elements (12mm dia, 2mm thick) under high vac-uum. Unlike the well-known transfocator devices the optical elements are randomly selectable. This enables a number of potential modes of operation, including the fine adjustment of focal length by adjusting the effective lens centre position when using CRLs or the use of some positions within the array to implement filters or reference foils. Actuation and guidance is achieved within the thickness of the element, so that the overall length of the device is minimised. The device has been in user operation on the I04 MX beamline at Diamond Light Source (DLS) since 2015. Another device is being assembled for use on the I11 beamline at DLS. It is also hoped to install another device on the I03 beamline. We present details of the mechanical design of the F-Switch and some examples of its operation.

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reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEPE22

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

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