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G$^0$ Electronics and Data Acquisition (Forward-Angle Measurements)

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.
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http://hal.in2p3.fr/in2p3-00136423
Contributor : Dominique Marchand <>
Submitted on : Wednesday, March 14, 2007 - 8:21:18 PM
Last modification on : Wednesday, May 6, 2020 - 4:26:04 PM
Document(s) archivé(s) le : Tuesday, April 6, 2010 - 10:19:58 PM

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D. Marchand, J. Arvieux, L. Bimbot, A. Biselli, J. Bouvier, et al.. G$^0$ Electronics and Data Acquisition (Forward-Angle Measurements). Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Elsevier, 2008, 586, pp.251-269. ⟨10.1016/j.nima.2007.11.028⟩. ⟨in2p3-00136423⟩

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