News Column

Reports from SLAC National Accelerator Laboratory Add New Data to Findings in Nuclear Science and Technology

June 3, 2014

By a News Reporter-Staff News Editor at Journal of Technology -- Research findings on Nuclear Science and Technology are discussed in a new report. According to news reporting from Menlo Park, California, by VerticalNews journalists, research stated, "ELine100 is a fast-frame 96-channel readout ASIC for SLAC Linac Coherent Light Source (LCLS) detectors. The circuit has been designed to integrate the charge from high-capacitance 2D sensors with rolling shutter and 1D sensors."

The news correspondents obtained a quote from the research from SLAC National Accelerator Laboratory, "It has a noise floor of 55 e(-) + 8 e(-)/pF r.m.s. at room temperature and it is suitable for applications requiring resolutions on the order of 100 e(-) r.m.s. and signals up to 120 photons/pixel/pulse at 8 keV (260 ke(-)). 2D sensors with a rolling shutter like the X-ray Charge Pump Sensor (XCPS), for which the ASIC has been optimized, present many pixels which are bussed on the same readout line. This characteristic, together with the fixed LCLS beam period, impose limitations on the time available for the read out of each pixel. Given the periodic structure of the LCLS beam, the ASIC developed for this application is a time-variant system, providing a two-stage low-noise charge integration, filtering, correlated double sampling and a processing speed of up to 250 k pixel/s on each channel. To cope with the required input range, a charge pump scheme has been implemented using an asynchronous zero-balance measurement method. It provides on-chip 1-bit coarse analog-to-digital conversion of the integrated charge. The residual charge is sampled using correlated double sampling into an analog memory, multiplexed and measured with the required resolution by an external ADC."

According to the news reporters, the research concluded: "In this paper, the ASIC architecture and performances are presented."

For more information on this research see: eLine100: A Front End ASIC for LCLS Detectors in Low Noise Applications. IEEE Transactions on Nuclear Science, 2014;61(2):1001-1006. IEEE Transactions on Nuclear Science can be contacted at: Ieee-Inst Electrical Electronics Engineers Inc, 445 Hoes Lane, Piscataway, NJ 08855-4141, USA. (Institute of Electrical and Electronics Engineers -; IEEE Transactions on Nuclear Science -

Our news journalists report that additional information may be obtained by contacting A. Dragone, SLAC Natl Accelerator Lab, Res Engn Div, Menlo Park, CA 94025, United States. Additional authors for this research include P. Caragiulo, D. Freytag, P. Hart, R. Herbst, S. Herrmann, C. Kenney, J. Segal and G. Haller.

Keywords for this news article include: Menlo Park, California, United States, North and Central America, Nuclear Science and Technology

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Source: Journal of Technology

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