MEDSI2016 - List of Keywords (simulation)

Paper	Title	Other Keywords	Page
MOPE27	The Influences of Material Properties to Micro Damages on Vacuum Chamber CF Flanges	ion, vacuum, FEL, diagnostics	63
	S. Vilcins, M. Holz, M. Lemke, D. Nölle, Ch. Wiebers DESY, Hamburg, Germany
	The European-XFEL, a 3.3 km long X-Ray laser facility, powered by a 17.5 GeV superconducting linear accelerator, is located at DESY in Hamburg [1]. For the diagnostics ultra-high vacuum components with high mechanical precision and strict requirements on particle cleanliness had to be developed, designed and produced. For the screen system of the facility, enabling to observe the size and shape of the electron beam, massive vessels, precisely milled out of stainless steel blocks 1.4435 (316L) have been produced. For these chambers all flange-connections are milled into these blocks. This paper will report onμdamages in these integrated knife edges and will present simulations of the damage mechanisms. It will also describe the influences of material properties of two different stainless steel brands, effects on the ¿knife edge¿ due to the penetration into the gaskets as well as the non-elastic deformation of the sealing area. The dependence of tightening forces under special conditions, like the very clean conditions in particle free applications due to the non-lubricated conditions will be reported. A ¿cooking recipe¿ to avoid suchμdamages will be given.
	Poster MOPE27 [0.187 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE27
About •	paper received ※ 09 September 2016 paper accepted ※ 23 September 2016 issue date ※ 22 June 2017
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPE28	Vacuum System of SESAME Storage Ring	ion, vacuum, storage-ring, injection	71
	M.A. Al-Najdawi, H. Al-Mohammad, E. Huttel, F. Makahleh, M.M. Shehab SESAME, Allan, Jordan
	Funding: N/A SESAME* is a third-generation synchrotron light source under construction near Amman (Jordan). The storage ring has 16 Dipole arc chambers, 8 short and 8 long straight chambers. The general layout and detailed design of the vacuum chambers, crotch absorbers, RF bellows, injection and RF sections will be presented in this contribution, also the testing of the chambers prototype, bake out process and final installation. * Synchrotron-light for Experimental Science and Applications in the Middle East
	Poster MOPE28 [2.696 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE28
About •	paper received ※ 10 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)

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, operation	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)

TUBA01	The Design of a Precision Mechanical Assembly for a Hard X-ray Polarizer	ion, experiment, controls, synchrotron-radiation	116
	S.P. Kearney, D. Shu, T.S. Toellner ANL, Argonne, Illinois, USA
	Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357 Hard x-ray polarisers are commonly applied in synchrotron radiation research to produce photons in a pure polarization state, and as polarization filters to analyse the photon’s polarization state after their interaction with a sample medium. We present the design of a mechanical assembly suitable for a hard X-ray polariser that requires multiple degrees of freedom with the base stage capable of handling at least 2-3 kg loads. The intermediary stages (roll, yaw, and translation directions) consist of commercially available tip/tilt and translational stages (Kohzu Precision Co., LTD). However, the requirements of the pitch stage are much more demanding and require a custom-designed flexure-based rotation stage. The design and analysis of this flexure-based rotation stage will be discussed in this study. This will include FEA analysis of the dynamic response and rotation range capabilities which will then be compared to mechanical performance test results using laser interferometers and accelerometer sensors.
	Slides TUBA01 [1.586 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUBA01
About •	paper received ※ 09 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)

TUCA03	Estimation of the Temperature Fluctuations Harshness Regarding Stability of Structures in the Nanometer Range	ion, experiment, ECR, operation	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)

TUPE02	Experimental Validated CFD Analysis on Helium Discharge	ion, experiment, SRF, cryogenics	156
	J.-C. Chang, Y.C. Chang, F.Z. Hsiao, S.P. Kao, H.C. Li, W.R. Liao, C.Y. Liu NSRRC, Hsinchu, Taiwan
	National Synchrotron Radiation Research Center in Taiwan (NSRRC) had set up three cryogenic systems to provide liquid helium to superconducting radio-frequency (SRF) cavities, insertion devices, and highly brilliant hard X-ray. The first one could produce liquid helium 134 LPH, with maximum cooling capacity of 469 W at 4.5 K. The second one could produce liquid helium 138 LPH, with maximum cooling capacity of 475 W at 4.5 K. The third one could produce liquid helium 239 LPH, with maximum cooling capacity of 890 W at 4.5 K. However, large liquid helium discharge in a closed space will cause personnel danger of lack of oxygen. We performed Computational Fluid Dynamic (CFD) simulation to analyse helium discharge through a SRF cavity in the Taiwan Light Source (TPS) tunnel. We simulated cases of helium discharge flow rates from 0.1 kg/s to 4.2 kg/s with and without fresh air supplied from the air conditioning system. We also set up both physical and numerical models within a space of 2.4m in length, 1.2m in width and 0.8m in height with nitrogen discharge inside to validate the CFD simulation.
	Poster TUPE02 [0.671 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE02
About •	paper received ※ 08 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)

TUPE05	Numerical Simulation of the ALBA Synchrotron Light Source Cooling System Response for Failure Prevention	ion, ECR, synchrotron, operation	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)

TUPE06	Thermo-Fluid Numerical Simulation of the Crotch Absorbers’ Cooling Pinholes for ALBA Storage Ring	ion, storage-ring, synchrotron, radiation	165
	X. Escaler, V. Arbo Sangüesa UPC, Barcelona, Spain J.J. Casas, C. Colldelram, M. Prieto, M. Quispe ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
	The ALBA Synchrotron Light Facility crotch absorbers, that remove the unused storage ring radiation, incorporate an internal cooling system composed by a number of parallel pinholes and by the corresponding stainless steel inner tubes inserted into each of them. Water flows in the resulting annular sections to evacuate the total heat power. Around each inner tube, a spiral wire is fixed along the whole length with a given pitch height in order to enhance the convection heat transfer. The influence of several design parameters on the absorber thermo-fluid behavior has been evaluated by means of the CFD software ANSYS CFX. In particular, the wall heat transfer coefficients and the pressure losses through a single pinhole have been evaluated for a range of different flow rates and pitch heights. Moreover, some modifications of the end wall geometry have been simulated as well as the effect of reversing the flow direction inside the channels. Finally, the critical crotch absorber type 3 has also been simulated and the limiting pitch height-flow rate combinations have been found based on the available driving pressure of the cooling system.
	Poster TUPE06 [1.546 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE06
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)

TUPE08	Finite Element Analysis of a Photon Absorber Based on Volumetric Absorption of the Photon Beam	ion, photon, radiation, synchrotron-radiation	169
	K.J. Suthar, P.K. Den Hartog ANL, Argonne, Illinois, USA
	Funding: This research used resources of the APS, a U.S. Department of Energy (DOE) Office of Science User Facility operated by Argonne National Laboratory under Contract No. DE-AC02-06CH11357. Designing photon absorbers for next generation multibend achromat storage rings can be challenging considering the high power densities and limited space that will typically be present. The potential for problematically high material temperatures and thermal gradients can be expected to be greater than that for previous generation machines on account of the shorter source-to-receiving surface distances. Conventionally, photon absorbers are made from copper which is highly opaque to x-rays. A consequence of this is that the majority of the heat is absorbed within a very short distance of the surface. Utilizing materials that allow a more volumetric absorption of the radiation can improve the efficiency of heat removal as it can keep surface temperatures and thermal gradients lower than would otherwise be possible. This paper discusses multiphysics analysis of a crotch absorber for the APS Upgrade project (APS-U) via full-coupling of heat-transfer and structural mechanics. The simulation results are discussed in detail.
	Poster TUPE08 [1.943 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE08
About •	paper received ※ 10 September 2016 paper accepted ※ 23 September 2016 issue date ※ 22 June 2017
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPE09	Thermo-Fluid Study of the UPC Race-Track Microtron Cooling System	ion, linac, microtron, vacuum	173
	X. Escaler, V. Blasco, Yu.A. Kubyshin, J.A. Romero, A. Sanchez UPC, Barcelona, Spain M. Prieto ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain V.I. Shvedunov SINP MSU, Moscow, Russia
	The cooling system of the race-track microtron (RTM), which is under construction at the Universitat Politècnica de Catalunya (UPC), has been simulated by means of a computational fluid dynamics (CFD) software. The hydraulic and thermal performance of the system has been studied for various operation conditions. Firstly, the hydraulic model has been validated by comparison with experimental measurements at different flow rates. Then, the cooling fluid temperatures and the pressure losses of the system have been determined and the capacity of the current design to remove the generated heat at nominal power has been confirmed. Finally, the wall maximum and average temperatures and heat transfer coefficients inside the magnets and the accelerating structure have been calculated. These results have allowed us to localize sections of the cooling system with a low convection due to detached flows where, therefore, a risk of zones of high temperatures exists. An optimization of the cooling circuit with the aim to reduce such high temperature zones has been proposed.
	Poster TUPE09 [0.552 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE09
About •	paper received ※ 02 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)

TUPE12	Developing White Beam Components of TPS Beamline 24A	ion, shielding, laser, target	183
	M.H. Lee, C.Y. Chang, C.H. Chang, S.H. Chang, C. Chen, C.C. Chiu, L. Huang, L. Lai, L. Lee, D.G. Liu, Y. Su, H.Y. Yan NSRRC, Hsinchu, Taiwan
	The TPS 24A, Soft X-ray Tomography (SXT) beamline, is one of the beamlines in the second construction phase at the Taiwan Photon Source (TPS). This bending magnet (BM) beamline has high flux in the range between 260 eV and 2600 eV. It is designed for transmission full-field imaging of frozen-hydrated biological samples. At the exit slit, the beam flux optimized in 520 eV is 282 billion photons/second with resolving power 2000, the beam size is 0.05 mm × 0.06 mm (V × H, FWHM) and the beam divergence is 1.73 mrad × 1.57 mrad (V × H, FWHM). By contributions of the generic beamline components project in recent years, modular mechanisms would be used in this beamline such as mask, X-ray beam position monitor (XBPM), photon absorber (PAB), and screens. However, these beamline components were designed for ID beamlines, so they should be redesigned for BM beamlines. This paper generally introduce these beamline components decided and redesigned for the TPS 24A. They will play important roles at the BM beam-lines in the future.
	Poster TUPE12 [1.355 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE12
About •	paper received ※ 09 September 2016 paper accepted ※ 22 September 2016 issue date ※ 22 June 2017
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPE13	Numerical Simulation of the ALBA Synchrotron Light Source Cooling System Response to Pump Start-Up and Shut-Down	ion, controls, synchrotron, network	187
	X. Escaler, D. Juan Garcia 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 submitted to regular pump start-ups and shut-downs. Moreover, pumps can trip due to motor power failures. As a result, the piping system can be subjected to surges and pressure oscillations. The 1D thermo-fluid simulation software Flowmaster has been used to predict these transient conditions taking into account the fluid compressibility, the pipe elasticity, the characteristic time response of the check valves and the pump/motors moments of inertia. During pump start-ups, significant pressure rises are detected that can be reduced by readjusting the PID controller parameters. Unexpected pump shut-downs do not appear to provoke significant water hammer conditions. However, pressure fluctuations are generated mainly in the same pumping line but also in the rest of the system due to the particular common return configuration. In all the cases the pressure regulation mechanisms acting on the pump rotating speeds serve to attenuate the consequences of these transients. Finally, the feasibility of the model to simulate the effect on the system response of trapped air inside the pipes has also been evaluated.
	Poster TUPE13 [0.743 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE13
About •	paper received ※ 07 September 2016 paper accepted ※ 22 September 2016 issue date ※ 22 June 2017
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPE14	Study, Design and Optimization Analysis of the ALBA LOREA Dipole Vacuum Chamber and Crotch Absorbers Based on Finite Element Analysis	ion, dipole, radiation, vacuum	191
	M. Quispe, J. Campmany, J.J. Casas, C. Colldelram, A. Crisol, J. Marcos, G. Peña, M. Tallarida ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
	This work deals with the FEA study, design and optimization of the LOREA dipole vacuum chamber and Glidcop Al-15 crotch absorbers. At present LOREA is the ninth beam-line being designed at ALBA with an Insertion Device (ID) consisting of an Apple II-type helical undulator. For the standard dipole chamber the vertical polarized light hits the walls because of the very narrow vertical aperture between the cooling channels. In vertical mode the ID vertical divergence equals ± 2.2 mrad and the peak power density and total power are 5.6 kW/mrad² and 5.5 kW, respectively. Due to the high power a temperature as high as more than 600 °C is calculated. In consequence the dipole chamber has to be modified and the absorbers have to withstand the Bending Magnet (BM) and ID radiation. The new absorbers have to be thicker and its cooling channels are farer from BM power deposition than the standard absorbers. The thermal mechanical simulations show good results, the new absorbers are in a safe range, the maximum temperature, stress and strain are 309.2 °C, 164.2 MPa and 0.14%, respectively. The main ALBA Storage Ring design parameters used in the simulations are: 3 GeV, 400 mA and 1.42 T (BM).
	Poster TUPE14 [1.524 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE14
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)

TUPE15	Thermal Management and Crystal Clamping Concepts for the New High-Dynamics DCM for Sirius	ion, synchrotron, radiation, undulator	194
	M. Saveri Silva, R.R. Geraldes, A. Gilmour LNLS, Campinas, Brazil T.A.M. Ruijl, R.M. Schneider MI-Partners, Eindhoven, The Netherlands
	Funding: Brazilian Ministry of Science, Technology and Inovation The monochromator is known to be one of the most critical optical elements of a synchrotron beamline, since it directly affects the beam quality with respect to energy and position. Naturally, the new 4th generation machines, with their small emittances, start to bring about higher stability performance requirements, in spite of factors as high power loads, power load variation, and vibration sources. A new high-dynamics DCM (Double Crystal Monochromator) is under development at the Brazilian Light Source for the Sirius EMA beamline (Extreme Condition X-ray Methods of Analysis). In order to achieve high-bandwidth control and stability of a few nrad, as well as to prevent unpredicted mounting and clamping distortions, new solutions are proposed for crystal fixation and thermal management. Since the design is based on flexural elements, it should be indeed highly predictable, so that the work was developed using mechanical and thermal FEA, including CFD. Efforts were made to predict thermal boundaries associated with the synchrotron beam, including incident, diffracted and scattered power, for which the undulator spectrum was employed in the Monte Carlo simulation package - FLUKA . "FLUKA: a multi-particle transport code", A. Ferrari, P.R. Sala, A. Fasso‘, and J. Ranft, CERN-2005-10 (2005), INFN/TC₀5/11, SLAC-R-773
	Poster TUPE15 [2.630 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE15
About •	paper received ※ 08 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)

TUPE26	Carbon-Steel/poliethylene Radiation Enclosures for the Sirius Beamlines	ion, radiation, shielding, neutron	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)

TUPE28	Characterization of the Acoustic Field Generated by the Single-Axis Acoustic Levitator	ion, experiment, LabView, photon	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)

WEBA01	Nostradamus and the Synchrotron Engineer: Key Aspects of Predicting Accelerator Structural Response	ion, synchrotron, damping, experiment	272
	C.A. Preissner, H. Cease, J.T. Collins, Z. Liu, J. Nudell ANL, Argonne, Illinois, USA B.N. Jensen MAX IV Laboratory, Lund University, Lund, Sweden
	Funding: Argonne is managed by UChicago Argonne, LLC, for the U.S. Department of Energy under contract DE-AC02-06CH11357. MBA designs are placing stringent mechanical tolerances on the magnet support systems. At the APS-U the mag-net-to-magnet vibration tolerances are about 10 nm . Timelines, installation requirements, and budgets constrain the resources available for prototyping and physical testing. Reliance on FEA to predict dynamic response is para-mount in insuring the tolerances are met. However, obtaining accurate results from a magnet support structure FEA is not as simple as analysing the CAD model of the structure. The 16th century author Nostradamus published a collection of prophecies that since his time, have been held up as predictions of various world events. While it is attractive to think his collection of short poems can be used to foretell the future, in reality it is only the vagueness and absence of any dates that make them easy to apply in a posthoc basis. Arguably, a similar statement can be made about the use of FEA in predicting accelerator support response. In this presentation the important contributors to FEA dynamic modelling will be discussed along with techniques that can be used to generate necessary data for models that can accurately predict response. APS-Upgrade, Functional Requirements Document, Advanced Photon Source, Argonne, IL, USA, APSU1695659, May 2016.
	Slides WEBA01 [14.136 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEBA01
About •	paper received ※ 10 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	ion, photon, radiation, factory	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)

FRAA03	Mechanical Design of MIRAS, Infrared Microspectroscopy Beam Line at ALBA Synchrotron	ion, vacuum, extraction, radiation	403
	L.R.M. Ribó, C. Colldelram, A. Crisol, A.A. Gevorgyan, R. Monge, J. Nicolás, L. Nikitina, M. Quispe, I. Sics, I. Yousef ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain P. Dumas SOLEIL, Gif-sur-Yvette, France G. Ellis CSIC, Madrid, Spain
	The infraredμspectroscopy beam line has been an In House project fully developed at ALBA as a result of a collaboration of different teams during the period 2014 where the design started to 2016 It is composed by a retractile mirror to extract the IR light from the bending magnet radiation and a system of 8 transport mirrors located by positioning systems designed for a high stability performance, to transport the extracted light outside the tunnel until the first End Station
	Slides FRAA03 [5.469 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-FRAA03
About •	paper received ※ 09 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)

Paper

Title

Other Keywords

Page

MOPE27

The Influences of Material Properties to Micro Damages on Vacuum Chamber CF Flanges

ion, vacuum, FEL, diagnostics

63

S. Vilcins, M. Holz, M. Lemke, D. Nölle, Ch. Wiebers
DESY, Hamburg, Germany

The European-XFEL, a 3.3 km long X-Ray laser facility, powered by a 17.5 GeV superconducting linear accelerator, is located at DESY in Hamburg [1]. For the diagnostics ultra-high vacuum components with high mechanical precision and strict requirements on particle cleanliness had to be developed, designed and produced. For the screen system of the facility, enabling to observe the size and shape of the electron beam, massive vessels, precisely milled out of stainless steel blocks 1.4435 (316L) have been produced. For these chambers all flange-connections are milled into these blocks. This paper will report onμdamages in these integrated knife edges and will present simulations of the damage mechanisms. It will also describe the influences of material properties of two different stainless steel brands, effects on the ¿knife edge¿ due to the penetration into the gaskets as well as the non-elastic deformation of the sealing area. The dependence of tightening forces under special conditions, like the very clean conditions in particle free applications due to the non-lubricated conditions will be reported. A ¿cooking recipe¿ to avoid suchμdamages will be given.

Poster MOPE27 [0.187 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE27

About •

paper received ※ 09 September 2016 paper accepted ※ 23 September 2016 issue date ※ 22 June 2017

Export •

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

MOPE28

Vacuum System of SESAME Storage Ring

ion, vacuum, storage-ring, injection

71

M.A. Al-Najdawi, H. Al-Mohammad, E. Huttel, F. Makahleh, M.M. Shehab
SESAME, Allan, Jordan

Funding: N/A
SESAME* is a third-generation synchrotron light source under construction near Amman (Jordan). The storage ring has 16 Dipole arc chambers, 8 short and 8 long straight chambers. The general layout and detailed design of the vacuum chambers, crotch absorbers, RF bellows, injection and RF sections will be presented in this contribution, also the testing of the chambers prototype, bake out process and final installation.
* Synchrotron-light for Experimental Science and Applications in the Middle East

Poster MOPE28 [2.696 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE28

About •

paper received ※ 10 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)

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, operation

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)

TUBA01

The Design of a Precision Mechanical Assembly for a Hard X-ray Polarizer

ion, experiment, controls, synchrotron-radiation

116

S.P. Kearney, D. Shu, T.S. Toellner
ANL, Argonne, Illinois, USA

Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357
Hard x-ray polarisers are commonly applied in synchrotron radiation research to produce photons in a pure polarization state, and as polarization filters to analyse the photon’s polarization state after their interaction with a sample medium. We present the design of a mechanical assembly suitable for a hard X-ray polariser that requires multiple degrees of freedom with the base stage capable of handling at least 2-3 kg loads. The intermediary stages (roll, yaw, and translation directions) consist of commercially available tip/tilt and translational stages (Kohzu Precision Co., LTD). However, the requirements of the pitch stage are much more demanding and require a custom-designed flexure-based rotation stage. The design and analysis of this flexure-based rotation stage will be discussed in this study. This will include FEA analysis of the dynamic response and rotation range capabilities which will then be compared to mechanical performance test results using laser interferometers and accelerometer sensors.

Slides TUBA01 [1.586 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUBA01

About •

paper received ※ 09 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)

TUCA03

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

ion, experiment, ECR, operation

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)

TUPE02

Experimental Validated CFD Analysis on Helium Discharge

ion, experiment, SRF, cryogenics

156

J.-C. Chang, Y.C. Chang, F.Z. Hsiao, S.P. Kao, H.C. Li, W.R. Liao, C.Y. Liu
NSRRC, Hsinchu, Taiwan

National Synchrotron Radiation Research Center in Taiwan (NSRRC) had set up three cryogenic systems to provide liquid helium to superconducting radio-frequency (SRF) cavities, insertion devices, and highly brilliant hard X-ray. The first one could produce liquid helium 134 LPH, with maximum cooling capacity of 469 W at 4.5 K. The second one could produce liquid helium 138 LPH, with maximum cooling capacity of 475 W at 4.5 K. The third one could produce liquid helium 239 LPH, with maximum cooling capacity of 890 W at 4.5 K. However, large liquid helium discharge in a closed space will cause personnel danger of lack of oxygen. We performed Computational Fluid Dynamic (CFD) simulation to analyse helium discharge through a SRF cavity in the Taiwan Light Source (TPS) tunnel. We simulated cases of helium discharge flow rates from 0.1 kg/s to 4.2 kg/s with and without fresh air supplied from the air conditioning system. We also set up both physical and numerical models within a space of 2.4m in length, 1.2m in width and 0.8m in height with nitrogen discharge inside to validate the CFD simulation.

Poster TUPE02 [0.671 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE02

About •

paper received ※ 08 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)

TUPE05

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

ion, ECR, synchrotron, operation

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)

TUPE06

Thermo-Fluid Numerical Simulation of the Crotch Absorbers’ Cooling Pinholes for ALBA Storage Ring

ion, storage-ring, synchrotron, radiation

165

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

The ALBA Synchrotron Light Facility crotch absorbers, that remove the unused storage ring radiation, incorporate an internal cooling system composed by a number of parallel pinholes and by the corresponding stainless steel inner tubes inserted into each of them. Water flows in the resulting annular sections to evacuate the total heat power. Around each inner tube, a spiral wire is fixed along the whole length with a given pitch height in order to enhance the convection heat transfer. The influence of several design parameters on the absorber thermo-fluid behavior has been evaluated by means of the CFD software ANSYS CFX. In particular, the wall heat transfer coefficients and the pressure losses through a single pinhole have been evaluated for a range of different flow rates and pitch heights. Moreover, some modifications of the end wall geometry have been simulated as well as the effect of reversing the flow direction inside the channels. Finally, the critical crotch absorber type 3 has also been simulated and the limiting pitch height-flow rate combinations have been found based on the available driving pressure of the cooling system.

Poster TUPE06 [1.546 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE06

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)

TUPE08

Finite Element Analysis of a Photon Absorber Based on Volumetric Absorption of the Photon Beam

ion, photon, radiation, synchrotron-radiation

169

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

Funding: This research used resources of the APS, a U.S. Department of Energy (DOE) Office of Science User Facility operated by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.
Designing photon absorbers for next generation multibend achromat storage rings can be challenging considering the high power densities and limited space that will typically be present. The potential for problematically high material temperatures and thermal gradients can be expected to be greater than that for previous generation machines on account of the shorter source-to-receiving surface distances. Conventionally, photon absorbers are made from copper which is highly opaque to x-rays. A consequence of this is that the majority of the heat is absorbed within a very short distance of the surface. Utilizing materials that allow a more volumetric absorption of the radiation can improve the efficiency of heat removal as it can keep surface temperatures and thermal gradients lower than would otherwise be possible. This paper discusses multiphysics analysis of a crotch absorber for the APS Upgrade project (APS-U) via full-coupling of heat-transfer and structural mechanics. The simulation results are discussed in detail.

Poster TUPE08 [1.943 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE08

About •

paper received ※ 10 September 2016 paper accepted ※ 23 September 2016 issue date ※ 22 June 2017

Export •

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

TUPE09

Thermo-Fluid Study of the UPC Race-Track Microtron Cooling System

ion, linac, microtron, vacuum

173

X. Escaler, V. Blasco, Yu.A. Kubyshin, J.A. Romero, A. Sanchez
UPC, Barcelona, Spain
M. Prieto
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
V.I. Shvedunov
SINP MSU, Moscow, Russia

The cooling system of the race-track microtron (RTM), which is under construction at the Universitat Politècnica de Catalunya (UPC), has been simulated by means of a computational fluid dynamics (CFD) software. The hydraulic and thermal performance of the system has been studied for various operation conditions. Firstly, the hydraulic model has been validated by comparison with experimental measurements at different flow rates. Then, the cooling fluid temperatures and the pressure losses of the system have been determined and the capacity of the current design to remove the generated heat at nominal power has been confirmed. Finally, the wall maximum and average temperatures and heat transfer coefficients inside the magnets and the accelerating structure have been calculated. These results have allowed us to localize sections of the cooling system with a low convection due to detached flows where, therefore, a risk of zones of high temperatures exists. An optimization of the cooling circuit with the aim to reduce such high temperature zones has been proposed.

Poster TUPE09 [0.552 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE09

About •

paper received ※ 02 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)

TUPE12

Developing White Beam Components of TPS Beamline 24A

ion, shielding, laser, target

183

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

The TPS 24A, Soft X-ray Tomography (SXT) beamline, is one of the beamlines in the second construction phase at the Taiwan Photon Source (TPS). This bending magnet (BM) beamline has high flux in the range between 260 eV and 2600 eV. It is designed for transmission full-field imaging of frozen-hydrated biological samples. At the exit slit, the beam flux optimized in 520 eV is 282 billion photons/second with resolving power 2000, the beam size is 0.05 mm × 0.06 mm (V × H, FWHM) and the beam divergence is 1.73 mrad × 1.57 mrad (V × H, FWHM). By contributions of the generic beamline components project in recent years, modular mechanisms would be used in this beamline such as mask, X-ray beam position monitor (XBPM), photon absorber (PAB), and screens. However, these beamline components were designed for ID beamlines, so they should be redesigned for BM beamlines. This paper generally introduce these beamline components decided and redesigned for the TPS 24A. They will play important roles at the BM beam-lines in the future.

Poster TUPE12 [1.355 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE12

About •

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

Export •

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

TUPE13

Numerical Simulation of the ALBA Synchrotron Light Source Cooling System Response to Pump Start-Up and Shut-Down

ion, controls, synchrotron, network

187

X. Escaler, D. Juan Garcia
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 submitted to regular pump start-ups and shut-downs. Moreover, pumps can trip due to motor power failures. As a result, the piping system can be subjected to surges and pressure oscillations. The 1D thermo-fluid simulation software Flowmaster has been used to predict these transient conditions taking into account the fluid compressibility, the pipe elasticity, the characteristic time response of the check valves and the pump/motors moments of inertia. During pump start-ups, significant pressure rises are detected that can be reduced by readjusting the PID controller parameters. Unexpected pump shut-downs do not appear to provoke significant water hammer conditions. However, pressure fluctuations are generated mainly in the same pumping line but also in the rest of the system due to the particular common return configuration. In all the cases the pressure regulation mechanisms acting on the pump rotating speeds serve to attenuate the consequences of these transients. Finally, the feasibility of the model to simulate the effect on the system response of trapped air inside the pipes has also been evaluated.

Poster TUPE13 [0.743 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE13

About •

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

Export •

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

TUPE14

Study, Design and Optimization Analysis of the ALBA LOREA Dipole Vacuum Chamber and Crotch Absorbers Based on Finite Element Analysis

ion, dipole, radiation, vacuum

191

M. Quispe, J. Campmany, J.J. Casas, C. Colldelram, A. Crisol, J. Marcos, G. Peña, M. Tallarida
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain

This work deals with the FEA study, design and optimization of the LOREA dipole vacuum chamber and Glidcop Al-15 crotch absorbers. At present LOREA is the ninth beam-line being designed at ALBA with an Insertion Device (ID) consisting of an Apple II-type helical undulator. For the standard dipole chamber the vertical polarized light hits the walls because of the very narrow vertical aperture between the cooling channels. In vertical mode the ID vertical divergence equals ± 2.2 mrad and the peak power density and total power are 5.6 kW/mrad² and 5.5 kW, respectively. Due to the high power a temperature as high as more than 600 °C is calculated. In consequence the dipole chamber has to be modified and the absorbers have to withstand the Bending Magnet (BM) and ID radiation. The new absorbers have to be thicker and its cooling channels are farer from BM power deposition than the standard absorbers. The thermal mechanical simulations show good results, the new absorbers are in a safe range, the maximum temperature, stress and strain are 309.2 °C, 164.2 MPa and 0.14%, respectively. The main ALBA Storage Ring design parameters used in the simulations are: 3 GeV, 400 mA and 1.42 T (BM).

Poster TUPE14 [1.524 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE14

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)

TUPE15

Thermal Management and Crystal Clamping Concepts for the New High-Dynamics DCM for Sirius

ion, synchrotron, radiation, undulator

194

M. Saveri Silva, R.R. Geraldes, A. Gilmour
LNLS, Campinas, Brazil
T.A.M. Ruijl, R.M. Schneider
MI-Partners, Eindhoven, The Netherlands

Funding: Brazilian Ministry of Science, Technology and Inovation
The monochromator is known to be one of the most critical optical elements of a synchrotron beamline, since it directly affects the beam quality with respect to energy and position. Naturally, the new 4th generation machines, with their small emittances, start to bring about higher stability performance requirements, in spite of factors as high power loads, power load variation, and vibration sources. A new high-dynamics DCM (Double Crystal Monochromator) is under development at the Brazilian Light Source for the Sirius EMA beamline (Extreme Condition X-ray Methods of Analysis). In order to achieve high-bandwidth control and stability of a few nrad, as well as to prevent unpredicted mounting and clamping distortions, new solutions are proposed for crystal fixation and thermal management. Since the design is based on flexural elements, it should be indeed highly predictable, so that the work was developed using mechanical and thermal FEA, including CFD. Efforts were made to predict thermal boundaries associated with the synchrotron beam, including incident, diffracted and scattered power, for which the undulator spectrum was employed in the Monte Carlo simulation package - FLUKA *.
* "FLUKA: a multi-particle transport code", A. Ferrari, P.R. Sala, A. Fasso‘, and J. Ranft, CERN-2005-10 (2005), INFN/TC₀5/11, SLAC-R-773

Poster TUPE15 [2.630 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE15

About •

paper received ※ 08 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)

TUPE26

Carbon-Steel/poliethylene Radiation Enclosures for the Sirius Beamlines

ion, radiation, shielding, neutron

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)

TUPE28

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

ion, experiment, LabView, photon

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)

WEBA01

Nostradamus and the Synchrotron Engineer: Key Aspects of Predicting Accelerator Structural Response

ion, synchrotron, damping, experiment

272

C.A. Preissner, H. Cease, J.T. Collins, Z. Liu, J. Nudell
ANL, Argonne, Illinois, USA
B.N. Jensen
MAX IV Laboratory, Lund University, Lund, Sweden

Funding: Argonne is managed by UChicago Argonne, LLC, for the U.S. Department of Energy under contract DE-AC02-06CH11357.
MBA designs are placing stringent mechanical tolerances on the magnet support systems. At the APS-U the mag-net-to-magnet vibration tolerances are about 10 nm *. Timelines, installation requirements, and budgets constrain the resources available for prototyping and physical testing. Reliance on FEA to predict dynamic response is para-mount in insuring the tolerances are met. However, obtaining accurate results from a magnet support structure FEA is not as simple as analysing the CAD model of the structure. The 16th century author Nostradamus published a collection of prophecies that since his time, have been held up as predictions of various world events. While it is attractive to think his collection of short poems can be used to foretell the future, in reality it is only the vagueness and absence of any dates that make them easy to apply in a posthoc basis. Arguably, a similar statement can be made about the use of FEA in predicting accelerator support response. In this presentation the important contributors to FEA dynamic modelling will be discussed along with techniques that can be used to generate necessary data for models that can accurately predict response.
* APS-Upgrade, Functional Requirements Document, Advanced Photon Source, Argonne, IL, USA, APSU1695659, May 2016.

Slides WEBA01 [14.136 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-WEBA01

About •

paper received ※ 10 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

ion, photon, radiation, factory

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)

FRAA03

Mechanical Design of MIRAS, Infrared Microspectroscopy Beam Line at ALBA Synchrotron

ion, vacuum, extraction, radiation

403

L.R.M. Ribó, C. Colldelram, A. Crisol, A.A. Gevorgyan, R. Monge, J. Nicolás, L. Nikitina, M. Quispe, I. Sics, I. Yousef
ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
P. Dumas
SOLEIL, Gif-sur-Yvette, France
G. Ellis
CSIC, Madrid, Spain

The infraredμspectroscopy beam line has been an In House project fully developed at ALBA as a result of a collaboration of different teams during the period 2014 where the design started to 2016 It is composed by a retractile mirror to extract the IR light from the bending magnet radiation and a system of 8 transport mirrors located by positioning systems designed for a high stability performance, to transport the extracted light outside the tunnel until the first End Station

Slides FRAA03 [5.469 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2016-FRAA03

About •

paper received ※ 09 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)