Abstract
The good time and position resolution of the resistive plate chamber (RPC) make it an attractive candidate for muon trigger systems at future colliders. However, this device has severe rate problems that make it unusable above 1 Hz/cm 2 in its present form. We have investigated various materials and have also discovered a new mode of operation that allowed us to operate the RPC at 150 Hz/cm 2. We discuss further improvements that may extend operation to even higher rates. We also discuss spark formation and explain the cause for the abnormally late spark signals.
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