Change det sim config to match current numbers

[jdkio]

Current det sim numbers were set some time ago. Andy's talk has more up-to-date numbers from the test stand. Also I didn't realize that TMS won't have reflective fiber ends like Minerva. The det sim currently assumes it does with 95% reflectivity. It doesn't make a large difference as most light comes from the direct path rather than from reflections. See practice Andy's talk here

[jdkio]

Andy pointed out that the number using test stand was using a 1cm scintillator. The scintillator in TMS is larger so that's why we have a larger number. So we don't think it needs to be changed. But the reflective ends still need to be removed

[jdkio]

At the second set of TMS practice talks, there was discussion of attenuation length. Lengths of 2-3m were discussed, and 4.16m was considered too long. At the same time, this plot from Minos suggests had ~35% attenuation after 7m, implying an attenuation length of -7/ln(0.35)=6.7m. Iirc, I got my numbers from spec sheets based on what WSF we'll get. So we need to have another look at this