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rates expected from the proposed upgrade of the Fermilab collider. II. NEW FEATURES OF THE MUON ELECTRONICS

By A. Wire Amplifier and Fig. Wire Amplifier


shows this arrangement. When the difference in arrival time is less than the propagation delay and setup time of the flipflop this scheme breaks down. Replacing the present far end jumper with a delay line of 20 ns solves this problem. A new wire amplifier based on the Analog Devices AD8001 and the Harris HF1105 monolithic operational amplifiers has been designed. A schematic diagram of the wire channel is shown in Fig. 1. The amplifier has a transformer coupled input which rejects common mode and low frequency noise. It has a rise time of 8 ns and an input noise level of 85 nA (RMS) for the bandwidth of interest. This allows us to operate with a discriminator threshold as low as 0.5 µA, compared with the existing threshold level of 2.0 µA. Additional measurements are necessary to determine the level of a synchronous noise produced by the digital par

Year: 2010
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