Mechanical Design And Installation Hadron Blind Detector (HBD) Don Lynch

1. Mechanical Design And Installation Hadron Blind Detector (HBD) Don Lynch HBD Safety Review

2. HBD General Features Detector surrounds beampipe in Central Region Gas tight enclosure using CF4. SS gas piping for high gas purity routes through sill. Transparency monitor in cabinet under South stairs. Continuous gas monitoring Alignment Precision: X, Y, Z : +/- 1.0 mm pitch, roll, yaw : +/- 1.0 mrad Repeatability: X, Y, Z : +/- 1.0 mm pitch, roll, yaw : +/- 1.0 mrad Stability: X, Y, Z : +/- .05 mm pitch, roll, yaw : +/- .05 mrad Install in Tight Position…move to retracted position when VTX is installed 12 detector modules per arm 48 HV cables from rack on Bridge to distribution boxes 168 shorter cables from dist box to detectors (21 each for north/south, up/down, east west) 24 LV & 2304 coax pair signal cables to old MVD rack distributed along the north and south arcs for the east and west arms to the 24 panels HBD Safety Review

3. Materials of Construction • Per Detector Enclosure: • Mylar coated with Al ("Sheldahl") 0.02 kg • Stainless Steel Mesh 0.19 kg • GEM detectors ("CERN“, Cu coated Kapton) 0.50 kg • PCB ("CERN“, Cu coated Kapton) 0.23 kg • FR4 (Gem frames, inserts, enclosure frames) 8.20 kg • Aramid Fiber Honeycomb (“Plascore”) 1.27 kg • Plastic screws 0.14 kg • Delryn Screws 0.05 kg • “Swagelok” Stainless gas connectors 0.32 kg • SHV connectors (“Huber-Suhner”) 1.76 kg • Internal HV wire (“Huber-Suhner”) 0.42 kg • Internal signal wire (“Huber-Suhner”) 0.12 kg • Banana connectors Total per detector enclosure 0.08 kg • SMD HV resistors (“Welwyn Components”) 0.20 kg • Voltage Divider resistors and Connectors 0.20 kg • Total per enclosure 13.70 kg • Additional assembly wt 10.00 kg • Total for entire detector assembly 37.40 kg (82.3 lb) HBD Safety Review

4. Clearance +/- 3 mm Z= 656.4 mm HBD final design 2x21 HV connectors serving 2x3 detector modules Gas out Removable window FR4 frame all around the cover HBD Safety Review

5. HBD exploded view Honeycomb Detector Modules HV Connectors Window & Frame Framing HBD Safety Review

6. Panel construction • The detector vessel has a polygonal shape formed by panels glued together • The panels behind the HBD active area consist of a 0.25 mm thick FR4 sheet and a 0.5 mm multilayer motherboard glued under vacuum to a ¾” thick honeycomb core • The other panels, outside the active area, are made of honeycomb sandwiched between two 0.25 mm thick FR4 facesheets HBD Safety Review

7. Installation HV Rack on Bridge 12 inch cable tray below bridge divided for HV and signal (Gas supply lines <not shown> run up south pole face to I-beams then to horizontally to detector connections) I beams to support HBD and later VTX. Also support plastic/aluminum cable trays to detectors LV and signal cables to Lower Rack in former MVD rack location HBD Safety Review

8. Four (4) 3 inch Aluminum I-beams, 2 below and 2 above for mounting & structural support for utilities. 3 brackets from each detector hemisphere, 2 each to upper beam and 1 to lower beam with 3 point adjustment for alignment. Set y, z, roll pitch and yaw with hemisphere away from beampipe, then adjust x position radially inward. Connect gas supply and return lines Attach arched cable management to beams and pole face and back to existing MVD cable tray or up to Bridge cable tray. Attach LV, HV and signal cables Installation HBD Safety Review

9. Gas Pipe Routing Stainless Steel pipe routed to and from mixing house into AH to gas monitoring (cabinet under stairs), over labyrinth, down below tracks through sill to CM region and up CM south pole face to i-beams HBD Safety Review