JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
@inproceedings{martinsdossantos:icalepcs2021-tupv003,
author = {L. Martins dos Santos and J.H. Řežende and P.D. Aranha and L.M. Kofukuda and G.N. Kontogiorgos and M.A.L. Moraes and M. Saveri Silva and H.C.N. Tolentino},
% author = {L. Martins dos Santos and J.H. Řežende and P.D. Aranha and L.M. Kofukuda and G.N. Kontogiorgos and M.A.L. Moraes and others},
% author = {L. Martins dos Santos and others},
title = {{The Control System of the Four-Bounce Crystal Monochromators for SIRIUS/LNLS Beamlines}},
booktitle = {Proc. ICALEPCS'21},
pages = {365--369},
eid = {TUPV003},
language = {english},
keywords = {controls, feedback, operation, synchrotron, alignment},
venue = {Shanghai, China},
series = {International Conference on Accelerator and Large Experimental Physics Control Systems},
number = {18},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {03},
year = {2022},
issn = {2226-0358},
isbn = {978-3-95450-221-9},
doi = {10.18429/JACoW-ICALEPCS2021-TUPV003},
url = {https://jacow.org/icalepcs2021/papers/tupv003.pdf},
abstract = {{CARNAÚBA (Coherent X-ray Nanoprobe) and CATERETÊ (Coherent and Time Resolved Scattering) are the longest beamlines in Sirius - the 4th generation light source at the Brazilian Synchrotron Light Laboratory (LNLS). They comprise Four-Bounce Crystal Monochromators (4CM) for energy selection with strict stability and performance requirements. The motion control architecture implemented for this class of instruments was based on Omron Delta Tau Power Brick LV, controller with PWM amplifier. The 4CM was in-house designed and consists of two channel-cut silicon crystals whose angular position is given by two direct-drive actuators. A linear actuator mounted between the crystals moves a diagnostic device and a mask used to obstruct spurious diffractions and reflections. The system is assembled in an ultra-high vacuum (UHV) chamber onto a motorized granite bench that permits the alignment and the operation with pink-beam. This work details the motion control approach for axes coordination and depicts how the implemented methods led to the achievement of the desired stability, considering the impact of current control, in addition to benchmarking with manufacturer solution.}},
}