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Slow Monitoring & Recording System, Status Summary

Slow Monitoring & Recording System, Status Summary. Glenn Horton-Smith KSU (presented by C. Lane, Drexel). Quick Summary. “1-wire” chips communicate using a “bus” of only one wire (+ground). Chips provide sensors for voltage, temperature, etc.

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Slow Monitoring & Recording System, Status Summary

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  1. Slow Monitoring & Recording System, Status Summary Glenn Horton-Smith KSU (presented by C. Lane, Drexel)

  2. Quick Summary • “1-wire” chips communicate using a “bus” of only one wire (+ground). • Chips provide sensors for voltage, temperature, etc. • The bus is inverted logic, wire-OR, with pull-up provided by the master, and pull-down by devices on the bus • Each chip has a unique ID, factory set. • Inexpensive, low EM radiation, easy to work with.

  3. How we’ll use them • The plan is to use the 1-wire chips in “powered” rather than “parasitic” mode: transmit +5V and 0V power, signal and signal ground, for faster performance. • Use CAT5 wiring and modular connectors for interconnections.

  4. Branches • Mfr. Spec for reliable operation is 300m/branch, with each chip equivalent to 0.5m, etc. • In principle, we could instrument an entire detector with one branch… • But it makes more sense to have more branches, perhaps with coupler chips to isolate and boost signals. • Multiple branches also allow disabling some branches, isolating faults, etc. • Estimated that we will need 256 chips/lab

  5. Tests • A few small-scale tests with ~4 devices over a few hundreds of meters of CAT5 cable have been carried out at KSU. • GAHS and an REU are doing more significant tests this summer • A large-scale test with hundreds of devices will be carried out before the full system is purchased.

  6. For more information • http://neutrino.phys.ksu.edu/DC/SlowMRS/

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