Trigger and Data Acquisition at the LHC Part I: Introduction and ...

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● ● ● ● ● ● Inelastic CrossSection is ~70mb 'Interesting' Physics on the order of a few nb 'Discovery' Physics on the order of pb or even fb Cannot (and probably do not) want to record every beam crossing Need to make choices defining 'interesting' 99.99%+ of these choices are made very quickly (within microseconds) and
Generic Trigger Requirements and Challenges ● ● Highly Efficient on the very rare processes that we wish to record Large Reduction of rate – Higher rate 'less interesting' processes – Instrumental Backgrounds ● ● ● ● High Processing Rate Large number of channels ~ 0.1 – few billion Push out 100 Mb/s to disk Not all detectors have data available in 25 ns (some take more than 10 times this) ● Do all of the above in simultaneously with a finite amount of $$ and time...
Page 1 and 2: Trigger and Data Acquisition at the
Page 3: Basics ● ● ● ● LHC will col
Page 9 and 10: Trigger 101 ● Need to examine (ne
Page 11 and 12: Pipelines ● ● ● Events come e
Page 13 and 14: Deadtime ● Deadtime - Fraction of
Page 15 and 16: Overall Trigger Architecture CMS AT
Page 17 and 18: Divide and Conquer ● Global LVL1
Page 19 and 20: Why not Inner Detector Tracking at
Page 21 and 22: to ROI or not to ROI ● ● ●
Page 23 and 24: Remove overlap, tabulate informatio
Page 25 and 26: Muon Trigger Efficiency and Rates A
Page 27 and 28: CMS Calorimeter Towers η ϕ η η
Page 29 and 30: Regional Calorimeter Trigger Receiv
Page 31 and 32: Of Strawman and Real Menus ● Teva

Trigger and Data Acquisition at the LHC Part I: Introduction and ...

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