| ID |
Date |
Author |
Category |
Subject |
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1
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Mon Jul 6 15:05:45 2026 |
Esther | design | NEEC project - scintillator holder for glueing to light guide |
Design
- 3D-printed holder for scintillator plate (100 x 28.9 x 1.05 mm)
- the thicknesses of the distance pieces can account for slight variations in the scintillator plate thickness, adjust as necessary
- design with and without alignment nubs at the bottom (for the detectors built in 2026 we used the design with alignment nubs)
- see picture for assembly details
- the parts of the holder are held together by M2 vinyl bolts and nuts, pressing the scintillator in-between them
- design used in 2026 to built a detector prototype for the NEEC experiment
Assembly
- the light guide was sanded on both sides using the turning tables next to Davide's workshop
- sanding up to a grit of about 800 to 1500 seems to make sense (for the glueing a rougher surface might be better?)
- optical glue provided by Michael Heil (CHECK WHICH ONE!!!)
- the glue components were mixed according to the instructions and left for a few hours to let the air bubbles escape
- a small plastic syringe was used both for mixing the components and for applying the glue to the light guide, this did not work as well as was hoped, in might be better to try disposable pipettes (at least for the mixing)
- the light guide was fixed vertically (check with spirit level!) in a vice and the holder was assembled with the scintillator plate inside (make sure that the bottom of the scintillator is flush with the base of the holder, then tighten the screws)
- a small strip of glue was applied to the top of the light guide were the base of the scintillator plate would sit
- the holder was placed on top of the light guide which spreads the glue (corrections are possible for a short time)
- the assembly was left as is over the weekend after which the glue had hardened well and the small amount of excess which had run down the along the light guide could be easily removed |
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2
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Tue Jul 21 14:15:59 2026 |
Esther | design | NEEC project - particle detector holder |
This is a 3D printed holder that serves multiple purposes for securing the holder at the back end of the pocket and shielding the photomultiplier (PMT) from the light in the cave.
It is designed for the long, square pocket that is installed at the first dipole magnet following the electron cooler.
It consists of three parts that are printed individually:
Part 1 is glued to the lightguide and PMT and attaches to the backend of the pocket using screws.
Part 2 is also attached using screws or can be glued into place as well. It surrounds the PMT.
Part 3 is slid onto part2 and acts as a light shield. The two cables coming of the end of the PMT (HV supply and signal output) are placed in the protruding cable channel.
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3
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Wed Jul 22 13:51:37 2026 |
Esther | design | Centering pieces for the light guide inside the pocket |
These are two designs for 3D printed centering pieces for the light guide within the square (46 x 46 mm) pocket.
The inner diameter is 35 mm which is intentionally larger than the diameter of the light guide (30 mm). The gap will be padded with foam rubber.
The design is 45.5 mm in one direction to center the light guide in side the pocket, but narrower in the other direction. The idea is to use at least two sets which are installed at a 90 degree angle. |