Author: Brito Neto, J.L.
Paper Title Page
MOPB03 Commissioning and Prospects of the High-Dynamic DCMs at Sirius/LNLS 25
  • R.R. Geraldes, J.L. Brito Neto, R.M. Caliari, M.A.S. Eleoterio, S.A.L. Luiz, M.A.L. Moraes, A.V. Perna, M.S. Silva, G.S. de Albuquerque
    LNLS, Campinas, Brazil
  Funding: Ministry of Science, Technology and Innovation (MCTI)
The High-Dynamic Double-Crystal Monochromator (HD-DCM)*,** is an opto-mechatronic system with unique architecture, and deep paradigm changes as compared to traditional beamline monochromators. Aiming at unmatching scanning possibilities and positioning stability in vertical-bounce DCMs, it has been developed since 2015 for hard X-ray beamlines at Sirius Light Source at the Brazilian Synchrotron Light Laboratory (LNLS). Two units are currently operational at the MANACA (macromolecular crystallography) and the EMA (extreme conditions) undulator beamlines, whereas a model for extended scanning capabilities in the energy range between 3.1 to 43 keV, the so-called HD-DCM-Lite, is in advanced development stage for two new beamlines, namely: QUATI (quick absorption spectroscopy), with a bending-magnet source; and SAPUCAIA (small-angle scattering), with an undulator source. In this work, online commissioning and operating results of the HD-DCMs are presented with emphasis on: the 10 nrad RMS (1 Hz - 2.5 kHz) pitch-parallelism performance; energy calibration; energy-dependent beam motion at sample; and flyscan with monochromator-undulator synchronization, which is a well-known control challenge at beamlines. To conclude, the Sirius HD-DCM family prospects, including the HD-DCM-Lite, are discussed.
*Geraldes, R. R., et al. "The New High-dynamics DCM for Sirius." Proc. of MEDSI 2016.
**Geraldes, R. R., et al. "The Status of the New High-Dynamic DCM for Sirius." Proc. of MEDSI 2018.
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About • paper received ※ 25 July 2021       paper accepted ※ 01 October 2021       issue date ※ 02 November 2021  
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