m.raymond@ic.ac.ukCMS Tracker Week, January 200212 Deadtime measurements – effect of decoupling and/or reducing R Deadtime dependence on whether hip signal on 1 or 2 channels significant only in R=100  case Decoupling and/or reducing R -> substantial improvement in deadtime Can parameterise deadtime and use to predict deadtime in CMS but already obvious that R-> 50  and/or adding decoupling will give significant improvement
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