Author: Ruz, A.
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TUAPL04 Em# Electrometer Comes to Light 137
  • J.A. Avila-Abellan, M. Broseta, G. Cuní, O. Matilla, M. Rodriguez, A. Ruz, J. Salabert, X. Serra-Gallifa
    ALBA-CELLS Synchrotron, Cerdanyola del Vallès, Spain
  • A. Milan-Otero, P. Sjöblom
    MAX IV Laboratory, Lund University, Lund, Sweden
  Em# project is a collaboration project between MAX IV Laboratory and ALBA Synchrotron to obtain a high performant four-channel electrometer. Besides the objective of accurate current measurements down to the pico-ampere range, the project pursues to establish a reusable instrumentation platform with time stamped data collection able to perform real time calculations for flexible feedback implementations. The platform is based on a FPGA responsible of acquisition and synchronization where a real-time protocol between the modules has been implemented (Harmony) [*]. The data acquired is transmitted via PCIe to a Single Board Computer with an embedded Linux distribution where high level processing and synchronization with upper levels of Control System is executed. In this proceeding, the reasons that lead to start a complex instrument development instead of using a Commercial On the Shelf (COTS) solution will be discussed. The results of the produced units will be analyzed in terms of accuracy and processing capabilities. Finally, different Em# applications in particle accelerators will be described, further widening the functionality of the current state-of-the-art instrumentation.
[*] Present and Future of Harmony Bus, a Real-Time High Speed Bus for Data Transfer Between Fpga Cores, these proceedings
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