CSC Trigger Rate Capabilities

One has to consider the rate capabilities of the CSC trigger with and without the presence of backgrounds. There will be large rates of punch-through pions, neutron-related hits in chambers, and penetrating accelerator muons. The present baseline design leads to expected background rates summarized here.

There is a note describing muon stub or LCT rates (Breedon, Fisyak, Ko, Rowe). This uses the present, somewhat inaccurate CMSIM simulation of cathode LCTs. A much worse assumption is that anode LCT patterns are assumed to be the same as the cathode LCT patterns. In fact, they should be much more limited (trigger rates should be much smaller.

Spreadsheets for the muon stub or LCT rates and background rate safety factors:

Strip rates and safety factors in html (web) or xls (Excel) format
Wire rates and safety factors in html (web) or xls (Excel) format
The Explanation for these calculations. (The hyperlinks are outdated).

There are a number of additional effects of background on the CSC muon trigger to consider:

Ghosting: when two muons or one muon plus a background stub are in the same chamber, one has four points of intersection of the two projections (strips and wires). What are the effects? Look here.
Do the measurements get distorted by the presence of background, so that the muon stubs are inefficient or have poor resolution? Look here.
Are there sources of "deadtime" within the front-end cards? Look here.
Are there sources of deadtime because of data flow bottlenecks? For example, transmission of stubs to motherboards, from motherboards to Port Cards, or from Port Cards to the Track Finder. Look here.