CeBr3 holder

2024-04-29

Sled with PTFE pads and new side hanger supports with large grooves for ISS screw crown.

Close-up on PTFE sled.

2024-02-19

Files sent for water-cutting, including models, technical drawings, and remaining parts of the holder that cannot be water cut.

2023-12-12

2023-11-17

2023-11-16

Less material, thinner where FEA was very relaxed, but I tried to keep margins around ideal constraints/conditions. The single-piece hanger is a lot more rigid than the old design, so keeping it if reasonable to manufacture. Added threaded holes in the front/back plates to mount wires on bolts for alignment. Bolt types reused quite heavily, so some look a bit long in some places. 44 kg total. Interference test cleared.

• All parts are Aluminium 7075, with a tensile strength of 572 MPa, parts were changed until < 100 MPa and often much lower than that, so some parts could be made even in 6061 (124–290 MPa) if cost/delivery is an issue.
• The front/back plates were done both standing on the feet and hanging.
• I put 10 N for "pressing" the crystals with negligible stress on the supports.
• Static position deviations were kept ~< 0.5 m, is typically lower.
• Cable weight/tension has not been taken into consideration.

2023-11-10

Less material, U-profiles for positioning crystals, magenta bars thinner + wider + ridge, combined some pieces in the hanger (not sure about that approach), feet for manipulation before hanging, spare holes for shields. The full model weighs 45 kg, each crystal ~ 0.9 kg. Interference analysis of full model cleared, FEA not yet done.

2023-11-09

Hanger design, and started optimising horiz+vert main plate supports from meeting with Jan-Åke. Making a snapshot before doing remaining suggested changes.

2023-11-05

Inventor 2023 model with implemented suggestions, eg. bolts+nuts, Al plates to press and protect detectors + deterministic positions, thicker bars (which need more work).

2023-09-20

4+5+4+5 #2

Corrected for actual crystals housing sizes of 55x55x110 mm^3, changed thickness of thick plates to 8 mm by recommendation from Jan-Åke, and carved out some material.

2023-09-15

4+4+4+4

2 rings, each ring with 4 sides, each side with 4 crystals. Thick plates are a ridiculous 1 cm thick.

4+5+4+5

2 rings, each with with 4 sides, top and bottom sides with 4 crystals, left and right with 5 crystals. Thick plates 5 mm thick.