For each unit, these pieces were cnc'd out of delrin. From the left:
a plate to hold the preamp, a plate to hold the SiPM, two plates to
hold the scintillating bar, and an end plate.
Solidworks files:
1,
2,
3,
4.
Stl files:
1,
2,
3,
4.
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| The plates are covered on both sides with black tape. Here the
preamp is mounted, and the SiPM (just visible) is mounted in the
rectangular well in the second plate.
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| Backside of these same plates. Visible are the 2-pin connector on the
back of the preamp, and the 2 leads of the SIPM on the middle one.
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| On the far end, just the bar holder and the endplate. A piece of
foam (not visible here) is taped to the inside of the back plate, so that
it pushes gently on the fiber end. The plates are held wit 6-32 screws, and
(hot)glued in the paper sleeve. The sleeve slides into the tube.
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| Stacks and sleeves.
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| Fibers are visible in the gap betewwn the bar and the SiPM plate
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| Final assembly. There is one unit with a 2x2cm bar, and one with a 1x1
cm bar. Total length 36" for the 2x2 unit, a bit shorter for the other one.
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| The tubes, by the way, are 2" ID plastic tubes from the
big printer paper roll, with a double black tape cover.
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