Steve's more detailed analysis

The first 1,000,000 events from this run are analyzed. Configuration was "production2009_200Gev_Single / Physics"

The clusters are generated from Qtdata. These clusters differ from the "appended/internal" L1 DSM input clusters in two aspects. 1. Qt8 sums are NOT truncated. 2. The perimeter high towers are ignored according to Eleanor's table. 

Total of 40 clusters, one for each Qt32 board, are compared to the threshold.

LED suppression is done by looking at the number of channels with ADC>10, and cutting at 800.

At this point, one very hot cell emerged in North Large (ch456) that has raised the trigger rate to ~32%.

Number of trigger breakdown per module

North Large: Total 154943 triggers, top 5 cells produced 88% of the NL triggers. Ch456 is producing more than 50% of the total FMS fast triggers. 

South Large: Total 26126 triggers, top 5 cells produced 19% of the SL triggers. ch282 that used to dominate the rate has been cooled down. 

North Small: Total 18234 triggers, top 5 cells produced 20% of the NS triggers.

South Small: Total 26367 triggers, top 5 cells produced 21% of the SS triggers.

Overall, 80.2% of the trigger came from large cells.

For the following plots, the origin is South Up.

Cluster sum distribution. (after low 5 bit suppression)

Trigger multiplicity

Mean ADC vs. Number of Triggers

Pseudo Rapidity vs. Number of Triggers 

Attached spreadsheet shows number of triggers, pseudo-rapidity, and phi for each cell.