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MOPE42 |
Experimental and Numerical Study of the ALBA LINAC Cooling System |
ion, experiment, operation, cavity |
102 |
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- 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
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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.
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Poster MOPE42 [1.073 MB]
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-MEDSI2016-MOPE42
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About • |
paper received ※ 09 September 2016 paper accepted ※ 15 September 2016 issue date ※ 22 June 2017 |
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TUPE09 |
Thermo-Fluid Study of the UPC Race-Track Microtron Cooling System |
ion, microtron, simulation, vacuum |
173 |
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- 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
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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.
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Poster TUPE09 [0.552 MB]
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE09
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About • |
paper received ※ 02 September 2016 paper accepted ※ 21 September 2016 issue date ※ 22 June 2017 |
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TUPE38 |
Progress and Mechanical Engineering of FEL Projects at SINAP |
FEL, ion, undulator, electron |
246 |
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- L. Yin, W. Fang, X. Hu, S. Sun, L. Wang, L.Y. Yu, W. Zhang
SINAP, Shanghai, People’s Republic of China
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Free electron laser (FEL) technology is the next focus at Shanghai Institute of Applied Physics (SINAP). Shanghai Deep Ultraviolet Free-Electron Laser (SDUV-FEL), a test facility for new FEL principles, was operated for 5 years and got a series of important results. Dalian Coherent Light Source (DCLS), a 50~150nm wavelength FEL user facility based on a 300MeV linac located at Dalian Institute of Chemical Physics, started beam commissioning in August. Shanghai X-ray Free-Electron Laser (SXFEL), a soft X-ray FEL test facility based on an 840MeV linac, will be installed in this month and the commissioning is scheduled at the beginning of 2017. The Progress of the FEL projects and the mechanical engineering in the design and construction are presented.
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Poster TUPE38 [8.096 MB]
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DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-MEDSI2016-TUPE38
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About • |
paper received ※ 07 September 2016 paper accepted ※ 15 September 2016 issue date ※ 22 June 2017 |
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