| Paper |
Title |
Page |
| MOPAN065 |
The Conceptual Design and Thermal Analysis of ALBA Crotch Absorbers
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299 |
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- E. Al-Dmour, D. Einfeld, M. Q. Quispe
ALBA, Bellaterra (Cerdanyola del Valles)
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ALBA is a 3 GeV, 268.8 m storage ring with DBA structure under construction near Barcelona. With the design current of 400 mA, a total power of 407 kW is radiated by the circulating beam from the bending magnets. The design of the vacuum system was done by using the concept of the crotch absorbers which is used in many modern synchrotron light sources. These absorbers are not only going to absorb the power of the unused radiation but also will allow fast vacuum conditioning. 156 absorbers are need all around the machine in order to guarantee that no radiation will hit the chamber walls, the absorbers are grouped into three types, several design criteria have been studied in order to create our own one which is based on the number of allowed cycles before failure with the concept of the strain values. Finite element analysis has been performed to estimate the stress, strain, maximum overall temperature and the maximum cooling temperature for all the types. The results for the critical absorber under conservative conditions: max. overall temperature is 313 C, max. strain is 0.1% and max. stress is 112 MPa. With this strain, the absorber can withstand up to 1.105 cycles of operation.
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| TUPMN066 |
Status of the ALBA Project
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1073 |
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- D. Einfeld
ALBA, Bellaterra (Cerdanyola del Valles)
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The construction of ALBA, the 3 GeV third generation Synchrotron Light Source near Barcelona (Spain) is proceeding according to schedule. The works for the building started in June 2006 and access to the building for installation of the 100 MeV Linac is expected at the end of 2007. Most of the machine components are already under construction and some have already been delivered. This report will concentrate on recent design developments, component choices and current status. Also the results on the first prototypes will be discussed. Other papers at this conference deal with accelerator physics issues and low level RF.
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| TUPMN068 |
Modelling of Gradient Bending Magnets for the Beam Dynamics Studies at ALBA
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1076 |
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- D. Einfeld, M. Belgroune, G. Benedetti, M. L. Lopes, J. Marcos, M. Munoz, M. Pont
ALBA, Bellaterra (Cerdanyola del Valles)
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The performance of the ALBA light source will be strongly determined by the quality of the bending magnet. In the ALBA case, most of the vertical focusing takes place in the combined function bending magnet, and the contribution of the edge focusing is required to obtain a stable working point. Experience from other modern light sources using combined function magnets (CLS, ASP, Spear-III) shows that the usual hard model is not sufficient for an accurate modelling of the machine. In this paper, we review the methods to model the effect of the bending magnet, including fringe fields, and how to obtain a good model from the 3D magnetic model.
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