Photon sources and instrumentation E. Karantzoulis1, S. Di Mitri1,2, F. Barbo1, W. Barletta3, S. Bassanese1, R. Bracco1, G. Brajnik1, A. Buonanno1, D. Caiazza1, A. Carniel1, D. Castronovo1, M. Cautero1, S. Cleva1, M. Comisso4, I. Cudin1, S. Dastan1, R. De Monte1, B. Diviacco1, A. Fabris1, R. Fabris1, G. Gaio1, S. Grulja1, L. Gregoratti1, A. Gubertini1, S. Krecic1, S. Lizzit1, G. Loda1, M. Lonza1, K. Manukyan1, B. Mazzucco1, M. Milani1, D. Millo1, M. Modica1, L. Novinec1, G. Pangon1, C. Pasotti1, A. Passarelli5, L. Rumiz1, S. Sbarra1, G. Scrimali1, N. Shafqat1, G. Simonetti1, M. Svandrlik1, F. Tripaldi1, M. Veronese1, R. Visintini1, E. Yousefi1, M. Zaccaria1 1 Elettra – Sincrotrone Trieste S.C.p.A., I - 34149 Basovizza, Trieste, Italy 2 University of Trieste, Department of Physics, I - 34100 Trieste, Italy 3 Department of Physics, Massachusetts Institute of Technology, Cambridge MA, United States 4 University of Trieste, Department of Engineering and Architecture, I - 34100 Trieste, Italy 5 INFN - Sezione di Napoli, Napoli, Italy e-mail: simone.dimitri@elettra.eu Original paper E. Karatzoulis et al., Nuclear Instruments and Methods in Physics Research A 1060 (2024) 169007; DOI: https://doi.org/10.1016/j. nima.2023.169007. Figure 1. Top, 3-D rendering of Elettra 2.0 arc view from inner side, inclusive af all vacuum, magnetic and support components. Bottom, from left to right, CAD model of a new elliptically polarized undulator, photo including its vacuum chamber, and dipole magnet with longitudinal and transverse field gradient. Reproduced from E. Karantzoulius et al., NIM A 1060 (2024) 169007. The energy of the extracted beam is selected by changing the extraction time along the energy ramp of the magnets. Simulations of beam injection into Elettra 2.0 showed that a horizontal emittance of 160 nm rad at 2.4 GeV is small enough to reach an injection efficiency of 95%. Thus, the Booster working point was changed. The new point increases the average horizontal dispersion in the long straight section of the injection and extraction lines, and transverse emittance “swap”, carried out for example through crossing of the difference linear resonance, was demonstrated to push the horizontal emittance down to sub-100 nm rad level. By the end of 2025, the electronics of the Booster beam position monitors will be replaced with the same system of Elettra 2.0, which will provide a resolution as low as 5 µm, more efficient noise rejection, and single-turn measurements. A digitizer card was recently adopted which will allow the detection of any small current leakage during the ramp, and thus will improve the injection efficiency during top-up. Tune measurement is done using inhouse developed, custom electronics, interfaced to an electronic board that includes an FPGA, memories, input and output channels. Elettra Highlights 2024–2025 143
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