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RAL Update

RAL Update. 25/05/2012. SP Stavelet #2. The best stavelet side yet! Rumours of “shrinkage” greatly exaggerated: shield pads match sensors well I blame my plastic ruler... Cutouts in cover layer slightly offset, but OK

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RAL Update

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  1. RAL Update 25/05/2012

  2. SP Stavelet #2 • The best stavelet side yet! • Rumours of “shrinkage” greatly exaggerated: shield pads match sensors well • I blame my plastic ruler... • Cutouts in cover layer slightly offset, but OK • Lengths of some of referencing bonds will be longer than on the existing stavelet • Roy’s design respects HV rules • My scalpel did not... Assembly mock up using module 13 (previously removed from DC-DC Stavelet)

  3. SP Stavelet #1 (CofM 9A) with HV MUX • Leakage • 674uA MUX no sensors • 508uA MUX with sensors • 158uA Sensors only • 9uA discrepancy

  4. Seperate HV feeds: 192.5, 195.0, 197.5, 200.0

  5. HV MUX: 191.9, 194.5, 197.2, 199.9

  6. DTN Seperate HV • Column 0 0 0 1 • Column 1 0 0 0 • Column 2 0 0 1 • Column 3 0 0 34 • Column 4 0 0 0 • Column 5 0 0 0 • Column 6 0 0 16 • Column 7 0 0 113 • Column 8 0 0 16 • Column 9 0 0 2 • Column 10 0 0 35 • Column 11 0 0 75 • Column 12 0 0 188 • Column 13 0 0 60 • Column 14 0 0 86 • Column 15 0 0 396 HV MUX • Column 0 0 0 0 • Column 1 0 0 0 • Column 2 0 0 1 • Column 3 0 0 36 • Column 4 0 0 1 • Column 5 0 0 1 • Column 6 0 0 20 • Column 7 0 0 116 • Column 8 0 0 7 • Column 9 0 0 2 • Column 10 0 0 24 • Column 11 0 0 51 • Column 12 0 0 105 • Column 13 0 0 49 • Column 14 0 0 54 • Column 15 0 0 247

  7. HV MUX: 191.9, 194.5, (0V), 199.9

  8. Comments Comments • HV MUX seems to work well • Noise with 3 on looks slightly higher • If I rerun with 4 on that’s now higher too! • Reproducibility issue, probably not related to MUX Features • Cannot go below voltage of SP+ if one wishes to avoid trips • HV switches can change state if HV supply trips • When HV switches open, can use SHV connectors to measure hybrid “0V” potential

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