1. Improved Rise Approximation Method for Pulse Arrival Timing.
- Author
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Jokhovets, L., Erven, A., Grewing, C., Herzkamp, M., Kulessa, P., Ohm, H., Pysz, K., Ritman, J., Serdyuk, V., Streun, M., Waasen, S. V., and Wintz, P.
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NUCLEAR counters , *APPLICATION-specific integrated circuits , *SIGNAL sampling , *ELECTRICITY pricing , *SAMPLING errors , *PROTON beams - Abstract
This paper describes the deduction of pulse arrival times from digital waveforms recorded with a multichannel data-acquisition (DAQ) system. A linear rise approximation (LRA) arrival timing method provides restricted timing resolution for pulses with nonlinear rise. It reaches 1/20th of the sampling period, if the relation between signal shaping and sampling rate is optimized. We introduce a nonlinear rise approximation (nLRA), which reduces the sampling phase error (SPE) down to less than 1/100th of the sampling period. The proposed timing algorithm uses a single free parameter that can easily be adjusted for various radiation detectors. The technique permits using a rather slow pulse shaping and low sampling rates, thus strongly reducing power consumption and the costs of the system. A high-density DAQ system integrating over 2000 channels inside an OpenVPX crate is presented. A prototype has been tested in the proton beam at cooler synchrotron (COSY) at Jülich Research Center (Germany). [ABSTRACT FROM AUTHOR]
- Published
- 2019
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