Description
Pagina 3 di 10
BPM
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The BPMs are based on the interception of the tails of the photon beam transversal intensity distribution by four metallic blades collecting a drain current. The distribution has been calculated and simulated by the FERMI@Elettra Machine Physics Group, and it results Gaussian in both transverse directions. Consequently, it is possible to calculate precisely the centroid of the horizontal-vertical transverse intensity distributions. Each blade can travel 30 mm transversally, and a complete closure in both directions is possible. All the four blades are electrically insulated, and made by Copper. By reading simultaneously the four currents it is possible to determine, pulse-by-pulse, the relative displacement of each single pulse with respect to the others, and the initial nominal position. The spatial resolution is expected to be better than 2 µm rms. Moreover, by the concurrent readings of the second BPM positioned about 9 meters after, it is possible to determine the angular movement of the photon beam shot-by-shot with sub-µrad precision. |
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Ultima modifica il Venerdì, 15 Novembre 2019 12:07
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Elettra-Sincrotrone Trieste S.C.p.A. di interesse nazionale Strada Statale 14 - km 163,5 in AREA Science Park 34149 Basovizza, Trieste ITALY Tel. +39 040 37581 - Fax. +39 040 9380902 Anagrafe Nazionale Ricerche Cod. 51779CRP partita IVA 00697920320 |
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