MVTX Interim Design Review Walter Sondheim Los Alamos

MVTX Interim Design Review Walter Sondheim Los Alamos National Laboratory November 19 th, 2018 1

Mechanics & Cooling • Changes to the MVTX CAD model to allow for it’s integration with the current (10 -17 -2018) model for the INTT and the s. PHENIX beam-pipe; End of INTT where MVTX detector fits – Increase radial dimension for each of the three tracking layers such that a minimum of 2. 0 mm stay clear area from the beam-pipe – Reduce the conical section’s radial dimension, at the ends of each detector layer to fit with in the envelope for the INTT November 19 th, 2018 2

Mechanics & Cooling – Modify each of the interconnection patch panels for each layer to be compatible with the smaller radius on the conical shells; • Allow for power cables from each stave to “pass-through” the patch panels in each layer, reducing their overall radial dimension • Extend the length of the analog and digital power cables to 380 and 400 mm each – Incorporate these changes into the outer shell, bringing the connecting flange to mate with a service barrel to the interior of the half cylinder November 19 th, 2018 3

MVTX CAD model: R= 107. 5 mm Modification to radial dimension of shell structure; original outer shell flange had a radius of 140. 0 mm, with a shell radius of 128. 6 mm. Current model has an outer shell radius of 107. 5 mm November 19 th, 2018 4

MVTX CAD model, exploded view; Outer shell & flange to service tube Layer 2 Layer 1 Layer 0 Air cooling distribution November 19 th, 2018 All layers showing 38 & 40 mm extension power cables 5

MVTX CAD model modification to patch-panels: Layer 0 with one ext. power cable & cooling lines Patch panels are in pairs per layer, inner one is structural for supporting outer shell, outer one serves as signal cable interface – 3 D printed November 19 th, 2018 6

Modification to MVTX sensor layers; Modified radial position of sensors in all three layers to give a radial clearance of ~ 2. 0 mm from the s. PHENIX beampipe. Closest radial distance is from surface mount components to beampipe = 2. 025 mm. Each layer moved out radially by 1. 25 mm. November 19 th, 2018 7

Modification to patch-panel & pass –through panel Original patch-panel outer radius: Layer 0, 56. 5 mm Layer 1, 86. 5 mm Layer 2, 116. 5 mm November 19 th, 2018 Modified patch-panel inner & outer radius; Layer 0, 29 & 50 mm Layer 1, 53 & 73. 5 mm Layer 2, 76 & 96. 5 mm View showing extension power cables passing through panel cut-out 8

ALICE inner layers in assembly jig; Layer 0: Patch-panel 3 D printer Pass-through panel, anodized aluminum Layer 1: Both layer shown in their assembly jig, note how pass-through panel serves as structural support for conical shell November 19 th, 2018 9

MVTX cables in service barrel November 19 th, 2018 10

MVTX power cable bundle cross-section Analog Power, OD 1. 55 m, sheath. 4 mm thick, 2 X Digital Power, OD 2. 35 mm, sheath. 4 mm thick, 2 X November 19 th, 2018 OD 8. 6 mm, sheath 1. 0 mm thick A shield will be incorporated Grounds, bias, slow controls OD 1. 45 mm, sheath. 4 mm thick, 6 X 11

MVTX power cable bundle unsheathed From previous slide, two of these adapter/connectors are for one stave. See next picture - November 19 th, 2018 12

November 19 th, 2018 13

MVTX signal (Samtec) and power cables Samtec-blue signal cable, non-halogen free. Two power cables; analog and digital stacked as if they were in a patch-panel. Note lose power cable bundles in this picture from testing at CERN. November 19 th, 2018 14

MVTX cooling concept; • The cooling for the MVTX detector is based on the cooling system designed and tested for the ALICE detector inner tracker upgrade. – Negative pressure water cooling November 19 th, 2018 staves 15

MVTX cooling line numbering in layers; Air cooling needed for MVTX; 5 cubic meters/hour, dry nitrogen to reduce humidity, flow into 5, 4 mm ID tubes mounted inner dia. of layer 0 MVTX cooling system max flow rate ~48 gphour, control to a flow of 1 gphour through each stave, critical to avoid cavitation November 19 th, 2018 16

MVTX plus service barrel estimated weight; • MVTX detector; 2 X 1100 gms = 2200 gms = 5 pounds • 1200 mm service barrel; 2 X 3644 gms = 7288 gms = 16. 08 pounds • Extension cables, water cooling lines, air cooling lines, patch panels/services supports – yet to be designed November 19 th, 2018 17

MVTX cooling fittings; • SMC pneumatic fittings – series KQ 2 H 04 Transition 2 mm from stave to 4 mm November 19 th, 2018 Cooling fan out - 18

MVTX grounding scheme; November 19 th, 2018 19

MVTX-INTT CAD model; Location for second intermediate patch panel, cable support Location for first intermediate patch panel Service half-barrel in this model is 1200 mm long November 19 th, 2018 20

MVTX with s. PHENIX beampipe Overall length of s. PHENIX beampipe, flange to flange 2, 565. 90 mm, beryllium center section length 800 mm November 19 th, 2018 21

MVTX, INTT, s. PHENIX beampipe November 19 th, 2018 22

s. PHENIX CAD model dated 11 -2 -2018 MVTX rack locations November 19 th, 2018 23

s. PHENIX horizontal section view X approximate location for MVTX racks Path for MVTX cable route X X November 19 th, 2018 24

s. PHENIX horizontal section detail; November 19 th, 2018 25

TPC-INTT-MVTX detectors, section view; 1200 mm service tube may not be long enough to locate second cable patch panel where service tube will be supported from, inner HCAL, inner tube for the INTT - November 19 th, 2018 26

MVTX; next steps • Update details on current MVTX CAD model – Remove interferences in model – Verify interfaces between shell layers – Detail analog cable interconnection in patch panel – Detail interconnections between power extension cables – Assume all cables/service terminate in downstream patch panel that will be part of service barrel – Perform FEA analysis towards structural support – Start design work on mounting and installation • In conjunction with INTT or independent November 19 th, 2018 27