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MINOS Near Detector Hall and Access Spaces

MINOS Near Detector Hall and Access Spaces. Presented by Rob Plunkett Fermi National Accelerator Laboratory. Introduction. Physical Layout of Minos Shaft and Hall Access to Hall Video of hall Infrastructure and Services Hall Environment Conclusions.

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MINOS Near Detector Hall and Access Spaces

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  1. MINOS Near Detector Halland Access Spaces Presented by Rob Plunkett Fermi National Accelerator Laboratory

  2. Introduction • Physical Layout of Minos Shaft and Hall • Access to Hall • Video of hall • Infrastructure and Services • Hall Environment • Conclusions

  3. Hall Schematic showing Detector and Services Experiment Electronics Experimental Power Magnet P.S. “House” Power LCW Distribution

  4. Hall Schematic showing Beam Envelope Beam envelope 12 ft. diameter Notes: Beam descends at 3.3o angle Area in front of detector has been kept clear from muon rate considerations!

  5. Elevation of MINOS Service Building

  6. Details of Hall and Detector

  7. Underground Schematic showing Detector Installation Path 400 ft. shaft to end 340 ft.

  8. Personnel Elevator Elevator Characteristics ~20 person capacity 4000 lb. load limit Speed 200 ft/s Size 5’4” x 7’10” (about like highrise) Separate emergency elevator Vertical Doors

  9. Details of MINOS Shaft Clear load space 22 ft. max. 8 ft. slot 5 ¾ ft

  10. Access Tunnels showing Beam Wider Section (downstream) Narrow Section

  11. Floor Area near Shaft To Absorber (9% grade) Sump trench Elevator (separated by wall) To Minos (level)

  12. View of Hall Outfitting Crane Rails Drip Ceiling Escape Passageway Looking towards Soudan

  13. Equipment Cranes • There are cranes installed in both the MINOS service building and the MINOS hall. • For use lowering equipment down shaft: • 15 ton capacity • Speed 40 ft/min. • Hook height 18’6” • “Pitch and catch” control system • For assembling MINOS detector in hall: • 15 ton capacity • Hook height 22 ft.

  14. Installed Electrical Power • Power in Minos Hall comes in “house power” and experimental “quiet power” varieties. Will focus on quiet power for now. • Sizing of capacity for quiet power in hall has been determined by the needs of the Minos Experiment. • Front-end electronics • DAQ electronics • Current experimental needs of the experiment are served by: • Two 75 KVA transformers ==> 150 KW. • Upstream panel board is sized for 600 A @ 480 V or 300 KW. • Upstairs transformer is 750 KVA.

  15. Pumping and Water Control • Tunnel system will generate between 320-400 gal/min. steadily. • All water is pumped out of MINOS shaft sump. • Target and decay pipe system drain to this point. • Before it is removed, water will serve as primary cooling for the underground equipment. • Pumping system based around redundancy. • Two well pumps, each with adequate capacity to handle job separately. • Third backup pump as well. • Emergency generator.

  16. Installed Water Cooling • Cooling needs (LCW) of MINOS experiment include: • Direct Water cooling of front end ASIC electronics. • Cooling of MINOS magnet. • Cooling of magnet power supply • Our primary cooling water supply is expected to be the tunnel inflow. • One large unit Fan Coil (25 KW) for general hall environmental control • 4 units for supplemental electronics cooling @ 7 KW each. • Heat exchanger for LCW sized for 150 KW. This is adequate but not generous for experiment. • Little or no spare capacity • May need to add dehumidifiers • Loads usually come in higher than design. • Proposals would prudently plan for additional cooling. (My opinion). • Probably needs additional water supply

  17. Expected Environmental Conditions • Temperature in Hall will be held at 60-70 degrees F. • Fan coil units with auxiliary heaters. • Relative Humidity at 60% • Egress corridor maintained at positive pressure w.r.t. hall. • Basic air flow is from corridor into the hall, then exiting through vent to surface. • Drip ceiling covers area over MINOS detector only. • Remainder of hall will be quite dry anyway.

  18. Conclusions • Needs of MINOS experiment will be well-met by the MINOS service building, shaft, and experimental hall. • Services have been sized to be appropriate. No extra cooling capacity. • Beam itself enters at an angle. Upstream section of hall has beam center about 10 feet above floor. • Experiment has specified a stay-clear drift space of 40 m upstream of detector, and this is reflected in the civil construction. Material in this area would require extensive simulation to understand its effects.

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