1 / 16

Ultra Low Mass Mechanics with CO 2 Cooling for a Future 4 Layer Barrel Pixel Detector

Ultra Low Mass Mechanics with CO 2 Cooling for a Future 4 Layer Barrel Pixel Detector. Silvan Steuli Roland Horisberger Stefan K ö nig CMS Upgrade Workshop FNAL 20 Novemer 2008. Two identical half shells 1 type of fullmodule 2 types of halfmodules At least 100 different cablelenghts.

margot
Download Presentation

Ultra Low Mass Mechanics with CO 2 Cooling for a Future 4 Layer Barrel Pixel Detector

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Ultra Low Mass Mechanics with CO2 Cooling for a Future 4 Layer Barrel Pixel Detector Silvan Steuli Roland Horisberger Stefan König CMS Upgrade Workshop FNAL 20 Novemer 2008

  2. Two identical half shells 1 type of fullmodule 2 types of halfmodules At least 100 different cablelenghts Current BPIX Mechanics

  3. Only one type of modules Simpler mechanics Two identical half shells All modules with same cablelenght More clearance between half shells Layer 1 closer to beampipe (44mm → 39mm) BPIX wheels adjustable in X andY (±3mm) → adapt to real situation → safer tolerances CO2 cooling .... Wishlist BPIX mechanics for 2013

  4. Possible number of faces • 18 faces (the current BPIX layer 1) • Top face displaced inwards • Bottom face displaced outwards • Half shells are notequal • This design requires: # faces = even number • 16 faces (BPIX Layer 1, 2013) • Top & bottom faces displaced outwards • Half shells are equal • This design requires: # faces = multiple of 4

  5. New BPIX layout for 2013 (proposal) • Two identical half shells • 1 type of fullmodule only • Layer 1: R 39mm; 16 faces • Layer 2: R 68mm; 28 faces • Layer 3: R 109mm: 44 faces • Layer 4: R 160mm: 64 faces • Clearance to beampipe 4mm

  6. Clearance to beampipe support Insertion: Minimum clearance to beampipe support is 10.5mm @ z= 1635mm.

  7. Adjustable wheel 3D view BPIX halfshell mechanics 2013 Half BPIX detector only one endflange shown

  8. 3D view BPIX detector mechanics 2013

  9. 20 10 0 10 50 20 30 40 h coverage of 4 Layer Pixel System Number of pixel modules in 4 layers system ~1.8 times of old 3 layers system.

  10. Transverse View of 4 Layer Barrel with FPIX Envelope BPIX supply tube BPIX cabling envelope need approval soon! FPIX envelope

  11. Layer 1 r=3.9cm Diamond filled Araldite Modified Mechanics for CO2 Cooling Cooling pipes stainless steel. Diameter d = 1.50mm and wall thickness t = 50mm  pmax = 275 bar safety factor 3  pop = 90bar 19 Nov 2008 test @ 90 bar Old New

  12. Temperature Distribution of module around CO2 tube Temperature profile of halfside of new BPIX module ROC 75 mm Silicon Sensor (t=300mm) ROC Power 120mW 2/3 Periphery 2mm 1/3 Pixel area 8mm C-fibre facets(t= 300mm)  heat transfer to tube is ok with reduced option !

  13. Cooling Pipe Connections to Supply Tube Micro-SERTO Stainless tubes D=1.5mm, t= 50mm 20 coolling loops per half shell  2 m loop length !

  14. Cassette with rails for pixel-insertion tests • Rails for FPIX / BPIX • Ribs to emulate TIB & bulkhead inner envelope • Cassette made out of Corapan (aluminium-styrofoam sandwich) • Rails milled out of 15mm PVC plates • Better studies for further pixel detector installation. • Corapan rail cassette top lid and top rails not shown

  15. New wheelset for next shutdown New detector top wheel New detector bottom wheel exchangeable spacer exchangeable spacer Old detector top wheel Old detector bottom wheel

  16. Very low mass mechanics for new 4 layer BPIX looks feasable Outer layer 4 has stiffness, layer 1,2 & 3 in very low mass construction Long pigtail modules & ultra low mass construction with CO2 cooling should give large factors in material budget. Impact parameter term due to multiple scattering in FPIX region (h =1.5–2.3) should reduce substantial New BPIX layout with one module type only  # faces = multiple of 4 Layer 1 radius reduces from 44mm  39mm Future BPIX wheelsets adjustable  adapt to real beampipe position Workout detailed design of new BPIX mechanics and fabricate in 3D stereo lithography model inclusive new supply tubes  insertion tests, clearances ! Cassette with rails for pixel-insertion tests design completed → fabrication Summary

More Related