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Lower Campus

This white paper highlights the ongoing construction and conceptual layout of the underground laboratory at Ft. Collins DUSEL Workshop. The facility, scheduled for completion in 2007, includes various specialized labs for deep biology, physics experiments, and the study of dark matter. Key features involve excavation contracts, scalability for new technologies, and infrastructure for large equipment. Critical considerations include access for heavy modules, emergency gas venting, and water resources for multiple experiments, ensuring a robust setup for cutting-edge research.

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Lower Campus

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  1. Lower Campus Harry Nelson UCSB HUSEP Ft. Collins Nov. 19, 2005

  2. SNOLAB Rectangular Hall 60ft L x 50ft W x 50ft H Cryo-Pit 65ft H x 50ft OD Underground Laboratory Conceptual Layout White Paper Description in Progress SNO Cavern 110ft H x 75ft OD Ladder-Labs 15ft W x 10ft H 20ft W x 10ft H Chemistry Lab  Excavation has begun under contract with Redpath  First new space in about 1 year  Laboratory complete in 2007 Ft. Collins DUSEL Workshop

  3. Clean Areas Overpressure – (all Class 2000)  H2S – air scrubbed (From Frasier Duncan) Ft. Collins DUSEL Workshop

  4. Initial Suite of Experiments (Bernard Sadoulet) Deep Campus Biology observ. Deep Biology Drilling 3 Medium block experiments PHYSICS TPC Solar ν DM ββ Ft. Collins DUSEL Workshop

  5. Xenon Infrastructure (Hanguo Wang) Ft. Collins DUSEL Workshop

  6. Bubble Lab Infrastructure (Andrew Sonnenschein) • Scalability and simplicity of construction of bubble and droplet chambers may create a demand for significant amounts of deep underground space on a short time scale. • Depth. Must Henderson equal SNOLAB depth to compete effectively for these projects? Would Henderson “central campus” be an acceptable place to be in 2010? • Type of underground space: General purpose, “Gran Sasso style” caverns would allow the lab to quickly adapt to new technologies, while custom excavations force us to plan further ahead and limit flexibility. • Access for large, heavy modules. These technologies probably allow instruments up to ~1 ton active mass to be built outside the lab and brought in on trucks. • Need water for shielding rock neutrons and perhaps for Muon veto Cherenkov counters. Can share infrastructure for water production and discharge with other experiments? • Venting: may require emergency capability to safely vent asphyxiating or mildly toxic gases. Similar requirement will exist for large cryo experiments. Ft. Collins DUSEL Workshop

  7. Germanium Infrastructure (Harry Nelson) • 20 m L  10 m W  10 m H (60  30  30 feet) • Liquid He and Nitrogen (compressor plant? 100 m2, 1000 sqft) • 100 kVA electrical power • 200 m3/minute air flow (6000 cfm) • low Radon capability (details need work) • 5-ton crane • What facilities are in common with the ββ program? • (Majorana, Gerda, Genius, CUORE) Ft. Collins DUSEL Workshop

  8. Simulated Santa Barbara (better yet, Isla Vista) beach • rest area Ft. Collins DUSEL Workshop

  9. Dark Matter Sensitivity versus Depth Dongming Mei & AH, preliminary Ft. Collins DUSEL Workshop

  10. bb Sensitivity versus Depth Degenerate Inverted Internal BGND Total Muon BGND Muons Muon-Induced Neutrons Normal Dongming Mei & AH, preliminary Ft. Collins DUSEL Workshop

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