Photon Rates
This figure shows the total photon rates for 1 nA at each detector, as well as the rates due to each process, for three energy ranges. Note that at each detector the highest rate seems to be from high energy Moller electrons.
These plots show the photon attenuation length parameterization for argon (From Figure 11.1 in PDB 1994). 
The rates were reduced by factoring in the photon attenuation in 1 cm of argon for 1nA current. The following plots show the rates with the argon attenuation factored in; note they are 500X smaller, less than 10 kHz. 
