Title :
An ultra-fast digitizer with picosecond sampling time for Coherent Synchrotron Radiation
Author :
Caselle, M. ; Brosi, M. ; Chilingaryan, S. ; Dritschler, T. ; Judin, V. ; Kopmann, A. ; Mueller, A.-S. ; Raasch, J. ; Smale, N.J. ; Steinmann, J. ; Vogelgesang, M. ; Wuensch, S. ; Siegel, M. ; Weber, M.
Author_Institution :
Karlsruhe Inst. of Technol., Karlsruhe, Germany
Abstract :
Since a few years Coherent Synchrotron Radiation (CSR) generated by short electron bunches is provided at the ANKA synchrotron light source. To study the THz emission characteristics over multiple revolutions superconducting YBa2Cu3O7-δ (YBCO) thin-film detectors can be used. The intrinsic response time of YBCO thin films is in the order of a few picoseconds only. For fast and continuous sampling of this individual ultra-short terahertz pulses a novel digitizer system has been developed with programmable sampling times in the range of 3 to 100 ps. The Real-time system is based on a heterogeneous FPGA and GPU architecture for on-line pulse reconstruction and evaluations of the peak amplitudes and the time between consecutive bunches. The data is transmitted to a GPU computing node by a fast data transfer link based on a bus master DMA engine connected to PCI express endpoint logic. This new DMA architecture ensures a continuous high data throughput of up to 4 GByte/s. The presented DAQ system is able to resolve the bursting behavior of single bunches even in a multi-bunch environment and to study the bunch-bunch-interactions.
Keywords :
computerised instrumentation; data acquisition; data communication; field programmable gate arrays; graphics processing units; particle beam bunching; peripheral interfaces; real-time systems; synchrotron radiation; terahertz waves; ANKA synchrotron light source; DAQ system; GPU architecture; GPU computing node; PCI express endpoint logic; THz emission characteristics; bunch-bunch-interaction; bus master DMA engine; coherent synchrotron radiation; data transfer link; data transmission; heterogeneous FPGA; multibunch environment; online pulse reconstruction; picosecond sampling time; real-time system; superconducting YBCO thin film detector; time 3 ps to 100 ps; ultrafast digitizer system; Data acquisition; Detectors; Fluctuations; Graphics processing units; Synchrotron radiation; Yttrium barium copper oxide;
Conference_Titel :
Real Time Conference (RT), 2014 19th IEEE-NPSS
Print_ISBN :
978-1-4799-3658-8
DOI :
10.1109/RTC.2014.7097535