Mechanical design of the Disc DIRC - current status & volume - PowerPoint PPT Presentation

Mechanical design of the Disc DIRC - current status & volume clashes Klaus Föhl Erik Etzelmüller Thomas Wasem AG Düren - Gießen University PANDA-MEC-meeting 9-December-2013 at GSI

most recent status Disc DIRC front view

Muon Detectors (Barrel)

summarising ● GEM ● overlap with cable paths – should be easy to remedy ● EMC ● overlapping tubes – should be easy to remedy ● laser pulser volumes clashing with supply lines ● opening in frame at 45 degrees not much usable? ● feedthroughs possible at 30 and 60 degrees? ● lowering Al frame by 15mm → routing tubes around ● Muon Detectors ● can some Barrel panels be made shorter? ● no cable routes indicated in the available drawings... ● SciTil ● drawings? (concept?)

Thank You

backup slides

most recent status – FLG element fused silica LiF radiator extension bars cylindrical or spherical curvature ● LiF doubling as MCP-PMT sensor extension and mirror dispersion- coating needed correcting piece colour filter ● cylindrical or (pigment or fused silica Focussing Light Guide dielectric) spherical surface possible ● colour filter to adjust photon rate to MCP allowable light photon dose performance curve for cylindric curvature

FLGs – typical sigma resolutions g e d 2 1 + sigma = 0.2 – 0.7 mm g e d 0 with added 2 nd curvature 2 - sigma = 0.2mm sigma = 0.015 – 0.03 mm sigma = 0.18 – 0.24 mm with added 2 nd curvature sigma = 0.07 – 0.13 mm

most recent status - positioning LiF bar Lif finger bars FLGs MCP-PMT synthetic amorphous fused silica radiator disc radiator Endcap EMC