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Analysis of Global and Muon Trigger Latency in CMS (November 2005)

This document discusses the latency measurements for the Global Trigger (GT) and Global Muon Trigger (GMT) as of November 11, 2005. Authors Anton Taurok and Manfred Jeitler provide insights into the estimated latency values, which include specific delays attributed to various components such as RPC, CSC, DTTF, and GCT. The overall latency between muon inputs and TTCci is reported at 19 bx, with additional transfer times highlighted. This analysis builds upon the previous review conducted in 2004, ensuring comprehensive documentation on the trigger performance.

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Analysis of Global and Muon Trigger Latency in CMS (November 2005)

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  1. Global Trigger and Global Muon Trigger Latency 11 November 2005 Anton Taurok / Manfred Jeitler Anton Taurok / Manfred Jeitler: GT and GMT latency

  2. 9.5 bx 9.5 bx 3 bx* RPC GMT GT 3 bx* CSC 3 bx* DTTF ? bx PSB GCT ? bx PSB 2 bx * estimated, subject to cable length Anton Taurok / Manfred Jeitler: GT and GMT latency

  3. GMT and GT latency Anton Taurok / Manfred Jeitler: GT and GMT latency

  4. comments • latency has not changed since last review in 2004 • overall latency between muon inputs and TTCci is 19 bx • add an estimated 3 bx transfer time for muons from RPC, CSC, DTTF • see CMS note 2004/022, chapter 5 • add transfer time from GCT to GT over ~2-3 m long Infiniband cable Anton Taurok / Manfred Jeitler: GT and GMT latency

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