1. G$^0$ Electronics and Data Acquisition (Forward-Angle Measurements)
- Author
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Marchand, D., Arvieux, J., Bimbot, L., Biselli, A., Bouvier, J., Breuer, H., Clark, R., Cuzon, J. -C., Engrand, M., Foglio, R., Furget, C., Grave, X., Guillon, B., Guler, H., King, P. M., Kox, S., Kuhn, J., Ky, Y., Lachniet, J., Lenoble, J., Liatard, E., Liu, J., Munoz, E., Pouxe, J., Quéméner, G., Quinn, B., Réal, J. -S., Rossetto, O., and Sellem, R.
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Nuclear Experiment - Abstract
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 $\vec{e}p$ elastic scattering by counting the recoil protons corresponding to the two beam-helicity states. Due to the high accuracy required on the 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 was used for monitoring (mainly FastBus). The time-encoding electronics and the DAQ system have been designed to handle events at a mean rate of 2 MHz per detector with low deadtime and to minimize 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., Comment: 35 pages. 17 figures. This article is to be submitted to NIM section A. It has been written with Latex using \documentclass{elsart}. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment In Press (2007)
- Published
- 2007
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