Don Lynch 9/15/05 HBD Safety Review 1 Mechanical Design And Installation Hadron Blind Detector (HBD) Don Lynch

Don Lynch 9/15/05 HBD Safety Review 2 HBD General Features –Detector surrounds beampipe in Central Region –Gas tight enclosure using CF 4. –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

Don Lynch 9/15/05 HBD Safety Review 3 Materials of Construction Per Detector Enclosure: Mylar coated with Al ("Sheldahl")0.02 kg Stainless Steel Mesh0.19 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 screws0.14 kg Delryn Screws0.05 kg “Swagelok” Stainless gas connectors0.32 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 enclosure0.08 kg SMD HV resistors (“Welwyn Components”)0.20 kg Voltage Divider resistors and Connectors0.20 kg Total per enclosure kg Additional assembly wt kg Total for entire detector assembly kg (82.3 lb)

Don Lynch 9/15/05 HBD Safety Review 4 HBD final design Z= mm Clearance +/- 3 mm Gas out 2x21 HV connectors serving 2x3 detector modules Removable window FR4 frame all around the cover

Don Lynch 9/15/05 HBD Safety Review 5 HBD exploded view Window & Frame Detector Modules HV Connectors Framing Honeycomb

Don Lynch 9/15/05 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

Don Lynch 9/15/05 HBD Safety Review 7 Installation HV Rack on Bridge 12 inch cable tray below bridge divided for HV and signal LV and signal cables to Lower Rack in former MVD rack location I beams to support HBD and later VTX. Also support plastic/aluminum cable trays to detectors (Gas supply lines run up south pole face to I-beams then to horizontally to detector connections)

Don Lynch 9/15/05 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

Don Lynch 9/15/05 HBD Safety Review 9 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 Gas Pipe Routing