Shading in PISA. Takao. Status and Issue. Implementing shade geometrically (or visually) in PISA was not difficult An issue was that Cherenkov photons were not absorbed at shades. Maxim is also aware of same type of problem
2.5cm means: 2.5cm height, with 2.5cm*2.5cm spacing. Same for 1.5cm.
For 1000 same electrons: Cherenkov photons I get at CsI
No Shade: 19980, Shade 2.5cm: 12319, Shade 1.5cm: 12547