Yearly: 2014

Control system and smart camera with image based trigger for fast synchrotron applications

Stevanovic U., Caselle M., Balzer M., Cecilia A., Chilingaryan S., Farago T., Gasilov S., Herth A., Kopmann A., Vogelgesang M., Weber M.

in 2014 19th IEEE-NPSS Real Time Conference, RT 2014 – Conference Records (2014), 7097495. DOI:10.1109/RTC.2014.7097495

Abstract

© 2014 IEEE. High-speed X-ray imaging applications such as radiography and tomography play a crucial role for non-destructive investigations in material and biology sciences. For data-intensive applications, on-line analysis of the data is necessary for initial quality assurance and data-driven feedback. In this article we will present a new smart camera platform, with embedded FPGA processing that is able to stream and process data continuously in real-time. It is used in the new imaging beamline IMAGE, in ANKA. The new smart camera platform consists of a CMOS sensor, an FPGA readout card connected with a high speed PCIe interface to the GPU-based readout computer. It is tightly coupled to a newly implemented control system, called Concert. Concert enables efficient operation of the beamline by integrating devices and experiment process control, as well as data analysis. A key feature of smart cameras is embedded image processing. In this article we will demonstrate the potential of this approach with the implementation of an image-based self-event trigger. The algorithm automatically restricts the readout to selected regions with changed content. Application dependent trigger parameters are hidden by our control system which sets them automatically according to experiment requirements and conditions.

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A picosecond sampling electronic “rapture” for terahertz synchrotron radiation

Caselle M., Brosi M., Chilingaryan S., Dritschler T., Hiller N., Judin V., Kopmann A., Muller A.-S., Raasch J., Rota L., Petzold L., Smale N.J., Steinmann J.L., Vogelgesang M., Wuensch S., Siegel M., Weber M.

in International Beam Instrumentation Conference, IBIC 2014 (2014).

Abstract

The ANKA storage ring generates brilliant coherent synchrotron radiation (CSR) in the THz range due to a dedicated low-ac-optics with reduced bunch length. At higher electron currents the radiation is not stable but is emitted in powerful bursts caused by micro-bunching instabilities. This intense THz radiation is very attractive for users. However, the experimental conditions cannot be easily reproduced due to those power fluctuations. To study the bursting CSR in multi-bunch operation an ultra- fast and high-accuracy data acquisition system for recording of individual ultra-short coherent pulses has been developed. The Karlsruhe Pulse Taking Ultra-fast Readout Electronics (KAPTURE) is able to monitor all buckets turn-by-turn in streaming mode. KAPTURE provides real-time sampling of the pulse with a minimum sampling time of 3 ps and a total time jitter of less than 1.7 ps. The KAPTURE system, the synchrotron operation modes and beam test results are presented in this paper.

Commissioning of an ultra-fast data acquisition system for coherent synchrotron radiation detection

Caselle M., Brosi M., Chilingaryan S., Dritschler T., Hertle E., Judin V., Kopmann A., Muller A.-S., Raasch J., Schleicher M., Smale N.J., Steinmann J., Vogelgesang M., Wuensch S., Siegel M., Weber M.

in IPAC 2014: Proceedings of the 5th International Particle Accelerator Conference (2014) 3497-3499.

Abstract

Copyright © 2014 CC-BY-3.0 and by the respective authors.The commissioning of a new real-time and high-accuracy data acquisition system suitable for recording individual ultra-short coherent pulses detected by fast terahertz detectors will be presented. The Karlsruhe Pulse Taking Ultra-fast Readout Electronics (KAPTURE) is able to monitor turn-by-turn all buckets in streaming mode. KAPTURE is based on a direct sampling pulse operating with a minimum sampling time of 3 ps and a total time jitter less than 1.7 ps. A very low noise layout design combined with wide dynamic range and bandwidth of the analog front-end enables the sampling of signals generated by different GHz/THz detectors. The system has already been used with NbN and YBCO superconductor film detectors as well as zero biased Schottky diode detectors. The digitized data is transmitted to a DAQ system by a FPGA high throughput board with data transfer rates of 4 GByte/s. The setup is accomplished by a real-time data processing unit based on high-end graphics processor units (GPUs) for on-line analysis of the frequency behaviour of the coherent synchrotron emission. The system has been successfully used to study the beam properties of the ANKA synchrotron radiation source located at the Karlsruhe Institute of Technology.