This board has a Hamamatsu LVR-6050CS-SMP1 SiPM in the middle, 6x6mm sensitive area.

This frame mounts loosely on the (inner) 4 big holes, and is aligned with pins closest to the SiPM.

The fibers are 60mils = 1.524mm. So 4x4 fibers don't fit, but a 4x3 hex pattern measures 5.48x5.33 mm.

Hubert van Hecke
Last modified: Sun Sep 23 17:20:57 MDT 2018