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Characterization of Wired-OR prototype board

Characterization of Wired-OR prototype board. Alberto Aloisio – Gianpaolo Carlino – Givi Sekhniaidze. 200 Wired-OR boards have been produced to be used in integration test in Frascati and cabling test at CERN. Prototype tested with unshielded 16 pole flat cable. Bench test results

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Characterization of Wired-OR prototype board

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  1. Characterization of Wired-OR prototype board Alberto Aloisio – Gianpaolo Carlino – Givi Sekhniaidze 200 Wired-OR boards have been produced to be used in integration test in Frascati and cabling test at CERN. Prototype tested with unshielded 16 pole flat cable. • Bench test results • Comparison of pulse shapes on RPC • Statistical analysis on Cosmic Ray data Lecce - RPC meeting

  2. Fast-Or board TDR analysis • TDR test results: • Z0 = 107 Ohm • Lmin = 290ps • Lmax = 320ps • Line-to-line max skew is 30ps Connectors’ through holes Lecce - RPC meeting

  3. Test setup Lecce - RPC meeting

  4. Bench test results • Input pulses in the 5 to 25 ns range (ch.1) • Output pulse on the 100 Ohm load (ch.2) Lecce - RPC meeting

  5. Selected pulses are acquired with a digitizing scope Scope is triggered by cosmic rays Signals from BML-D chamber equipped with final front-end boards with stretching capacitor RPC signals without and with OR Direct pulse Wired-OR Lecce - RPC meeting

  6. Typical RPC pulses with and without OR are superimposed OR loading and multiple-reflection pattern sharpen the pulses Width and amplitude are both preserved Only few pulses acquired Statistical analysis is required to evaluate the impact on detector performances Direct comparison Direct pulse Wired OR Lecce - RPC meeting

  7. Efficiency measured in both cases are the sameVTH = -1.0 V, HV = 10400 V, e ~ 97% Statistical analysis on Cosmic Ray events(8 strip pairs) Direct pulse Wired OR Leading edge Trailing edge Width Lecce - RPC meeting

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