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L1 Trigger Rate Study

L1 Trigger Rate Study. Nathaniel Amos. Part 1. GMT Eta Distributions. GMT Eta Distribution. Studied Eta distribution of GMT output Can be used to estimate GMT Rate in Eta Data sample taken from: Runs: 190389-194115 HLT_L1SingleMuOpen and json_DSConly.txt GMT Qualities selected:

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L1 Trigger Rate Study

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  1. L1 Trigger Rate Study Nathaniel Amos

  2. Part 1 • GMT Eta Distributions

  3. GMT Eta Distribution • Studied Eta distribution of GMT output • Can be used to estimate GMT Rate in Eta • Data sample taken from: • Runs: 190389-194115 • HLT_L1SingleMuOpen and json_DSConly.txt • GMT Qualities selected: • Quality 5: RPC Only • Quality 6: DT or CSC, No RPC • Quality 7: DT/RPC or CSC/RPC

  4. GMT Eta Distribution Spikes Eta

  5. What causes the spikes? • Observe each subsystem independently • Observe GMT-DT matches at GMT Quality 6, 7 • Observe GMT-CSC matches at GMT Quality 6, 7 • If GMT Eta > 2.1, require CSCTF Mode 5 • Observe RPC-GMT matches at GMT Quality 5 and GMT BX = 0 • Plot each Eta distribution

  6. GMT-CSC Matches at Quality = 6 No spike observed at |Eta| = 1.0 Eta

  7. GMT-CSC Matches at Quality = 7 No spike observed at |Eta| = 1.0 Eta

  8. GMT-CSC Matches at 5 ≤ Quality ≤ 7 No spike observed at |Eta| = 1.0 Eta

  9. GMT-RPC Matches at Quality = 5 Eta

  10. GMT-DT Matches at Quality = 6 Spikes Eta

  11. GMT-DT Matches at Quality = 7 Eta

  12. GMT-DT Matches at 5 ≤ Quality ≤ 7 Spikes Eta

  13. Part 2 • GMT Relative Rates

  14. Relative GMT Matches • Plot number of GMT-subsystem matches relative to total number of GMT matches • Plotted for each category (below) • Define several categories for matches: • DT, |Eta| < 0.9 • CSC, 1.2 < |Eta| < 2.1 • or 1.2 < |Eta| < 2.0 (See next slides) • RPC, |Eta| < 1.6 • DT Overlap, 0.9 < |Eta| < 1.2 • CSC Overlap, 0.9 < |Eta| < 1.2

  15. Two Methods of Plotting • Plot GMT-subsystem matches divided by total number of GMT matches (referred to as “relative counts”) • Plot GMT-subsystem matches divided by total number of GMT matches per subsystem region width (a type of rate density) • Example: • CSC (1.2 < |Eta| < 2.1): each Eta bin has width of Eta = 0.1 • Therefore CSC relative counts divided by 18 bins

  16. Relative Counts, |Eta| < 2.1 60% of the GMT matches come from the CSCs.

  17. Relative Counts Per Region Width,|Eta| < 2.1 The spikes we saw in the Overlap region from the DT each come in a single bin (Eta = ±1.0) The DT overlap region produces a much greater contribution per bin.

  18. Relative Counts, |Eta| < 2.0 Now, with |Eta| strictly less than 2.0, the CSCs are seen to contribute less than 30% of the GMT tracks (outside the overlap region). A lot of rate is bottled up in that extra Eta bin at ±2.1 (some tracks maybe have ME1/1 A station).

  19. Relative Counts Per Region Width, |Eta| < 2.0 Once again, with the width of the full region reduced from |Eta| < 2.1 to |Eta|< 2.0, the CSCs are seen to contribute much less rate. The DT Overlap’s spikes are very apparent here.

  20. Conclusions • Spikes do not appear to come from CSC • But there is a lot of rate at 2.0 <|Eta| < 2.1 • Some tracks may come from ME 1/1A • DT in overlap region shows spikes • Appears to be Eta = ±1.0 • Plan to repeat study • Use HLT_L1SingleMu10 • More statistics • JSON_MuonPhys.txt • Exclude possible problems in muonsystem

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