electronics and data acquisition (forward-angle measurements)
| Autor: | S. Kox, J. Arvieux, R. Sellem, J. Kuhn, A. S. Biselli, M. Engrand, J. Bouvier, H. Guler, P.M. King, J. S. Real, J.-C. Cuzon, L. Bimbot, X. Grave, G. Batigne, O. Rossetto, G. Quéméner, B. Guillon, E. Liatard, Y. Ky, R. Clark, C. Furget, J. Lachniet, R. Foglio, Jianglai Liu, E. Munoz, J. Pouxe, B. P. Quinn, D. Marchand, J. Lenoble, H. Breuer |
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| Rok vydání: | 2008 |
| Předmět: |
Physics
Elastic scattering Nuclear and High Energy Physics Proton Physics::Instrumentation and Detectors media_common.quotation_subject Detector 01 natural sciences Asymmetry 030218 nuclear medicine & medical imaging Nuclear physics 03 medical and health sciences 0302 clinical medicine Data acquisition Recoil 0103 physical sciences Electronics 010306 general physics Nucleon Instrumentation media_common |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 586:251-269 |
| ISSN: | 0168-9002 |
| Popis: | The G 0 parity-violation experiment at Jefferson Lab (Newport News, VA) is designed to determine the contribution of strange/anti-strange quark pairs to the intrinsic properties of the proton. In the forward-angle part of the experiment, the asymmetry in the cross-section was measured for e ⇒ p elastic scattering by counting the recoil protons corresponding to the two beam-helicity states. Due to the high accuracy required to measure the few-part-per-million asymmetry, the G 0 experiment was based on a custom experimental setup with its own associated electronics and data acquisition (DAQ) system. Highly specialized time-encoding electronics provided time-of-flight spectra for each detector for each helicity state. More conventional electronics, processing only a small fraction of the events, was used for monitoring (mainly FastBus). The time-encoding electronics and the DAQ system have been designed to handle events from the 128 detector pairs at a mean rate of 2 MHz per detector pair with low deadtime and with minimal helicity-correlated systematic errors. In this paper, we outline the general architecture and the main features of the electronics and the DAQ system dedicated to G 0 forward-angle measurements. |
| Databáze: | OpenAIRE |
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