Dale A. Ouimette

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The electronics of a secondary trigger for particle physics is described. The system has several desirable features that solve track recognition problems in situations where several subsystems of various cell configurations participate in the decision making. Track curvature and multiplicity are the criteria used. Versatility is attained through the use of(More)
We describe electronics for a drift chamber which measures drift times and has multi-hit capability. The system is based on a stable (± 0.005%) 125 MHz clock which eliminates the need for frequent calibrations. The times are digitized according to a Gray code in order to restrict transition errors to the least significant bit. The least count is 4 ns which(More)
For IT+ = Rate (I$-+IT'~'v), we have measured the charge asymmetry, tj I ($T'-)/($+ r-), to be (+ 0.28 k 0.05)s. Such an asymmetry is evidence of CP violation. We have compared our result with previous CP violation experiments in this and other decay modes of the neutral kaon. We find consistency among the experiments, and consistency with the predictiocs(More)
. We have built, and used to take physics data, a digitizing and readout system for Brookhaven AGS Experiment 791, a high-rate search for rare kaon decays. All digitization of charge and time information is “flash” (performed in less than 200 ns), followed by front-end buffering and a pipelined readout with massive parallelism. A data transfer rate of 0.5(More)
The circuit generates a fast (&#x02248;200 ns) trigger in response to two particles (one &#x003C0; and one &#x003BC;) passing through two scintillation hodoscopes and satisfying criteria of direction and spatial separation. The selection of 4-fold coincidences identifying the relevant tracks is effected by simultaneous RAMs<sup>1</sup> in coincidence with(More)
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