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PP1 design

PP1 developments at LAPP Nicolas Massol , on behalf of the LAPP team ATLAS Upgrade Week CERN, Nov 20th 2012. PP1 design. Based on a moveable PCB : patch-panel + cables rerouting + environmental barrier. PP1 based on a PCB. Type I side. Type II side. AXON hybrid nano -D. Hypertac.

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PP1 design

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  1. PP1 developments at LAPPNicolas Massol, on behalf of the LAPP team ATLAS Upgrade WeekCERN, Nov 20th 2012

  2. PP1 design Based on a moveable PCB : patch-panel + cables rerouting + environmental barrier Nicolas Massol

  3. PP1 based on a PCB Type I side Type II side AXON hybrid nano-D Hypertac Nicolas Massol

  4. The MAPP (Moveable ATLAS Patch-Panel) Board • Specifications : • 20 Layers • Total thickness : 2,76mm • Top and Bottomlayers for LV signals • 8 Innerlayers for the HV signal • 10 Innerlayers for DCS differential pairs • Components : • 6 Hypertacconnectors • 40 Axon nano-D connectors Nicolas Massol

  5. The MAPP Board : routing • Number of pins : • DCS : 1600 • HV : 1920 • LV : 320 • GND : 228 PCB area : ~1000 cm² (includingmechanics) Electrical part area: ~600 cm² PCB produced and received, not yettested Nicolas Massol

  6. The Axon type I harness: new version • Electrical tests on the first version: • HV spark on the 12 channels: around 1.5kV  safety margin not big enough • Weak point in this design : distance between pins row and metallic shell • Air gap between male and female inserts is also a weakness • Modification of the current design: • BeforeAfter • Wall thickness of the femalemetallicshell / length of the male metallicshelldecreased • Mechanical tolerance on the insert part removed  tolerance now on the shells • New order placed for a new harness Nicolas Massol

  7. Fake harnesses • Fake type I harnesses manufacturing: 40 per PCB • Fake cables based on the real prototype harness specs • Hybrid nanoD connectors made in rapid prototyping • Real screws + standoffs to study the plug locking and the accessibility Nicolas Massol

  8. PP1 region mockup • Transparent box to simulate the tracker volume • Direct vision on the bundles behaviour during the PP1 closing • Possibility to pressurize the box to measure the PP1 tightness • All the material available but the full assembly not yet started Nicolas Massol

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