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The new Vertex Locator for LHCb, comprising a new pixel detector and readout electronics, will be installed in 2020 for data-taking in Run 3 at the LHC. The electronics centres around the "VeloPix" ASIC at the front-end operating in a triggerless readout at 40 MHz. Custom serialisers send zero-suppressed data from the VeloPix at a line rate of 5.13 Gb/s. System tests of the com- plete electronic and optical chain, along with early results from high-speed link tests at CERN are presented.

2017 IEEE International Black Sea Conference on Communications and Networking, BlackSeaCom 2017 -- 5 June 2017 through 8 June 2017 -- -- 134510, 2-s2.0-85050773594, In this study, we propose a new dynamic line rate assignment strategy that responds to load intensity fluctuations of daily traffic in wavelength-division-multiplexed (WDM) mixed-line-rate (MLR) optical networks. We present Survivable Routing with Rate and Wavelength Assignment (SRRWA) and we propose an efficient shared backup path protection solution for dynamic traffic model. We prepared simulation scenarios to demonstrate the effect of handling load intensity periods over routing performance in terms of communication cost and resource utilization. We compared the results of the proposed strategy with static line rate assignment methods. The simulation results show that proposed strategy has an average performance while highest resource utilization and lowest cost values are obtained by the static rate matching line rate assignment method. © 2017 IEEE.

An XYZ nanopositioner is designed for fast the atomic force microscopy. The first resonant modes of the device are measured at 8.8, 8.9, and 48.4 kHz along the X-, Y-, and Z-axes, respectively, which are in close agreement to the finite-element simulations. The measured travel ranges of the lateral and vertical axes are 6.5 ?m � 6.6 ?m and 4.2 ?m, respectively. Actuating the nanopositioner at frequencies beyond 1% of the first resonance of the lateral axes causes mechanical vibrations that result in degradation of the images generated. In order to improve the lateral scanning bandwidth, controllers are designed using the integral resonant control methodology to damp the resonant modes of the nanopositioner and to enable fast actuation. Due to the large bandwidth of the designed nanopositioner, a field programmable analog array is used for analog implementation of the controllers. High-resolution images are successfully generated at 200-Hz line rate with 200�200 pixel resolution in closed loop. � 1996-2012 IEEE.