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["Corey, Sam" <corey.90 AT buckeyemail.osu.edu>]

Hi Caroline, all,

 

I attached a zip file containing a bunch of plots with different combinations of configurations, as well as plots showing the difference between each configuration and the default.

 

I also caught a bug on my end that effected our conversation earlier-the 20 layer, 2cm absorber, 8cm scintillator configurations were missing from the plot. This is quite important because these are the configurations with the highest efficiency. The conclusions we can draw from this are:

 

1. 5x5 cm vs. 10x10 cm tiles do not make a huge difference, but 10x10 is slightly higher efficiency
2. Increasing the number of layers increases the efficiency. Going from 10 to 15 layers while keeping all else the same increases the efficiency by about 5% for 1 GeV neutrons.
3. Increasing the amount of scintillator compared to the amount of absorber causes the largest change in efficiency.  For neutrons around 0.5 GeV, with 20 layers, 2cm absorber, going from 4mm scintillator to 8mm scintillator increases the efficiency by nearly 20%.

 

The scintillator/absorber ratio causes the most change in efficiency. The least efficient configurations have r=0.1, and the most efficient has 0.4. The LFHCal-like configuration (1.52 cm absorber, 25 layers) has r=0.26, and the 20 layer options with 4mm and 8mm scintillator have r=0.2 and 0.4 respectively.

 

Sorry I missed this in my first pass at the plots!

 

Thanks everyone,

Sam

Attachment: neutron effs.zip
Description: neutron effs.zip