Author: Rocha e Silva, D.V.
Paper Title Page
MOPB08 Vibration Assessment at the CARNAÚBA Beamline at Sirius/LNLS 37
  • C.S.N.C. Bueno, F.A. Borges, G.R.B. Ferreira, R.R. Geraldes, L.M. Kofukuda, M.A.L. Moraes, G.B.Z.L. Moreno, D.V. Rocha e Silva, M.H.S. Silva, H.C.N. Tolentino, L.M. Volpe, V.B. Zilli, G.S. de Albuquerque
    LNLS, Campinas, Brazil
  Funding: Ministry of Science, Technology and Innovation (MCTI)
CARNAÚBA (Coherent X-Ray Nanoprobe Beamline) is the longest beamline at Sirius Light Source at the Brazilian Synchrotron Light Laboratory (LNLS), working in the energy range between 2.05 and 15 keV and hosting two stations: the sub-microprobe TARUMÃ, with coherent beam size varying from 550 to 120 nm; and the nanoprobe SAPOTI, with coherent beam size varying from 150 to 30 nm. Due to the long distances from the insertion device to the stations (136 and 143 m) and the extremely small beam sizes, the mechanical stability of all opto-mechanical systems along the facility is of paramount importance. In this work we present a comprehensive set of measurements of both floor stability and modal analyses for the main components, including: two side-bounce mirror systems; the four-crystal monochromator; the Kirkpatrick-Baez (KB) focalizing optics; and the station bench and the sample stage at TARUMÃ. To complement the components analyses, we also present synchronized long-distance floor acceleration measurements that make it possible to evaluate the relative stability through different floor slabs: the accelerator slab, over which the insertion device and first mirror are installed; experimental hall slab, which accommodates the second mirror; and the slabs in satellite building, consisting of three inertial blocks lying over a common roller-compacted concrete foundation, the first with the monochromator and the remaining ones with an station each. In addition to assessing the stability across this beamline, this study benchmarks the in-house design of the recently-installed mirrors, monochromators and end-stations.
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About • paper received ※ 29 July 2021       paper accepted ※ 16 September 2021       issue date ※ 09 November 2021  
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