Barrel DIRC Mechanics -Update Andreas Gerhardt PANDA Collaboration - PowerPoint PPT Presentation

Barrel DIRC Mechanics -Update Andreas Gerhardt PANDA Collaboration Meeting 19/2 Darmstadt, 2019/06/25

Outline • Barrel DIRC Main Components • Conceptual Design of the Radiator Frame • Potential Usage of Shared Installation Platforms • Downstream Overlap of GEM/DIRC Border 2 Andreas Gerhardt – PANDA Collaboration Meeting

Barrel DIRC Main Components Radiator Barrel (SciTil Support) Readout Unit Internal radius 448mm • Internal radius 448mm • External radius 538mm • External radius 1080mm • Total weight ≈ 400kg • Total weight ≈ 500kg • 3 Andreas Gerhardt – PANDA Collaboration Meeting

Conceptual Design of the Radiator Frame Support structure of the barrel: Radiator Barrel Frame: Slots for 16 bar boxes • Slots for 16 SciTil boxes • Central tracker beams included • 4 Andreas Gerhardt – PANDA Collaboration Meeting

Conceptual Design of the Radiator Frame Support structure of the barrel: outer sheet (CFRP) downstream ring (aluminum) 5 Andreas Gerhardt – PANDA Collaboration Meeting

Conceptual Design of the Radiator Frame Support structure of the barrel: outer sheet (CFRP) downstream ring (aluminum) inner sheets (CFRP) 16 slot profiles (extruded aluminum) upstream ring (aluminum) 6 Andreas Gerhardt – PANDA Collaboration Meeting

Conceptual Design of the Radiator Frame Support structure of the barrel: 2 CT beams outer sheet (CFRP) (extruded aluminum) downstream ring (aluminum) inner sheets (CFRP) 16 slot profiles (extruded aluminum) upstream ring (aluminum) 7 Andreas Gerhardt – PANDA Collaboration Meeting

Conceptual Design of the Radiator Frame CT beams integration: previous design of the CT beams Barrel DIRC volume flanges to connect rail-system for STT frame SciTil slot bar box slot slot profile 8 Andreas Gerhardt – PANDA Collaboration Meeting

Conceptual Design of the Radiator Frame CT beams integration: new design of the CT beams Barrel DIRC volume flanges to connect rail-system for STT frame (still needed?) SciTil slot bar box slot slot profile 9 Andreas Gerhardt – PANDA Collaboration Meeting

Conceptual Design of the Radiator Frame CT beams integration: new conceptual design of the CT beams Barrel DIRC volume Advantages: no connections to slot profiles necessary • less parts; less material; etc. • 10 Andreas Gerhardt – PANDA Collaboration Meeting

Conceptual Design of the Radiator Frame Connection between rings and profiles (downstream): machined profile contour joining bolts Mechanical joining with bolts • to reach a high precision. Machined profile contour to reach a • defined gap for an adhesive joint. slot profile 11 Andreas Gerhardt – PANDA Collaboration Meeting

Conceptual Design of the Radiator Frame Connection between rings and profiles (upstream): joining bolts Mechanical joining with bolts • to reach a high precision. Machined profile contour to reach a • defined gap for an adhesive joint. slot profile 12 Andreas Gerhardt – PANDA Collaboration Meeting

Conceptual Design of the Radiator Frame Conceptual Design of the outer sheet: outer sheet Outer sheet directly fabricated to the frame • to reach a stiff, form-locked connection. Cylindrical shape changed to polygon shape. • 13 Andreas Gerhardt – PANDA Collaboration Meeting

Conceptual Design of the Radiator Frame Conceptual design of the outer sheet: outer sheet – polygonal shaped inner sheet – cylindrical shaped 14 Andreas Gerhardt – PANDA Collaboration Meeting

Potential Usage of Shared Installation Platforms DIRC radiator barrel installation: DS support cone Barrel DIRC frame Barrel EMC installation platform 15 Andreas Gerhardt – PANDA Collaboration Meeting

Potential Usage of Shared Installation Platforms DIRC radiator barrel installation: The Barrel EMC • installation beam fits into the Barrel DIRC radiator frame. 16 Andreas Gerhardt – PANDA Collaboration Meeting

Potential Usage of Shared Installation Platforms DIRC radiator barrel installation: After the DS support cone is • installed, the Barrel DIRC frame can be moved in. Access is needed on the upstream and downstream side of the barrel. 17 Andreas Gerhardt – PANDA Collaboration Meeting

Potential Usage of Shared Installation Platforms DIRC radiator barrel installation: A shared usage of the • installation platform could be possible, but… 18 Andreas Gerhardt – PANDA Collaboration Meeting

Potential Usage of Shared Installation Platforms … the preliminary concept intends to lift the installation • beam to move it out of the barrel. This could be a problem with the dimensions of the Barrel DIRC. Slides from talk of Valeriy Ferapontov – February 2019 19 Andreas Gerhardt – PANDA Collaboration Meeting

Potential Usage of Shared Installation Platforms DIRC bar boxes (+SciTil boxes) installation: needed space for special device bar box (SciTil box) additional access needed close to the barrel aux platform 20 Andreas Gerhardt – PANDA Collaboration Meeting

Potential Usage of Shared Installation Platforms DIRC readout unit (+prism boxes) installation: readout unit prism box frame additional access aux platform needed close to the barrel 21 Andreas Gerhardt – PANDA Collaboration Meeting

Downstream Overlap of GEM/DIRC Border CT beam GEM Barrel DIRC 22 Andreas Gerhardt – PANDA Collaboration Meeting

Downstream Overlap of GEM/DIRC Border CT beam GEM ≈ 18mm overlap of the CT beams; inner flanks 23 Andreas Gerhardt – PANDA Collaboration Meeting

Downstream Overlap of GEM/DIRC Border Barrel DIRC GEM inner sheet ≈ 2mm overlap of the GEM and the Barrel DIRC inner sheet • a lot of 0-contacts between GEM and Barrel DIRC surfaces (need to check the • safety distances) Involved groups are in contact and working on a solution… 24 Andreas Gerhardt – PANDA Collaboration Meeting

Thank you for your attention.