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IHEP 2001 - 53 (In Russian) | |
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| E.A.Usenko | ||
| Low Threshold Discriminator for Chambers RPC | ||
| Protvino, 2001.-p.7, figs.6, tables 1, refs.:6. | ||
The fast, low threshold discriminator for testing RPC chambers for Muon System ATLAS experiment (CERN, Switzerland) are presented. Low threshold discriminator is complete of low noise preamplifier and time-over-threshold discriminator. The preamplifier is consisting of external circuit of low noise transistor KT399A and fast amplifier 171UV2 (analog mA733). The results of its general characteristics are presented. The minimum threshold of amplifier-discriminator is 60 uV, input impedance 25 Ohm, time slewing is 0.6 nsec from 2X to 20X threshold, minimum input voltage noise 25 uV (RMS), rise time of preamplifier typically 8 nsec.
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