Mean number of TPC hits per padrow per event averaged over sectors vs. luminosity (depth in the histograms).

Hits available to tracking, all sectors	Hits with flag=0, all sectors
Hits available to tracking, good sectors	Hits with flag=0, good sectors

Hits available to tracking exclude those with flag & FCF_CHOPPED or flag & FCF_SANITY. I have not investigated which flags are set for the hits that fail the flag=0 cut.

Good sectors exclude 3,5,6,7,15,19,20,21,22,23 (meant to exclude portions of the TPC where there are dead channels or low gain regions).

Runs used (50 events of zerobias data from each): 13077066, 13077068, 13077073, 13077076, 13077081, 13078001, 13078006, 13078014, 13078028, 13078035, 13078039, 13078043, 13078048, 13078051, 13078058, 13078070, 13099025 (this last run is the lone high luminosity run in this sample).

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Here are the fraction of hits available to tracking (in good sectors) which have their flags set:

FCF_ONEPAD (1)	FCF_MERGED (2)
FCF_BIG_CHARGE (8)	FCF_CHOPPED (256)

I found no other flags set except for a couple hits with FCF_SANITY. We see FCF_ONEPAD at the few percent level, increasing with luminosity (occupancy?). Similarly for FCF_MERGED, but at the 10s of percent level (nearly reaching 50%). FCF_BIG_CHARGE is at a very small level with no clear pattern in this data. FCF_CHOPPED is also at the sub-1% level, with the only obvious pattern being more of them in the outer sectors than inner.

-Gene