Harry Nelson

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
3
Clean Areas Overpressure (all Class 2000)
? H2S air scrubbed
(From Frasier Duncan)
4
Initial Suite of Experiments (Bernard Sadoulet)

• Deep Campus
• Biology observ.
• Deep Biology Drilling
• 3 Medium block experiments
• PHYSICS

TPC
Solar ?
DM
ßß
5
Xenon Infrastructure (Hanguo Wang)
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.

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 ßß
  program?
• (Majorana, Gerda, Genius, CUORE)

8

• Simulated Santa Barbara (better yet, Isla Vista)
  beach
• rest area

9
Dark Matter Sensitivity versus Depth
Dongming Mei AH, preliminary
10
bb Sensitivity versus Depth
Degenerate Inverted
Internal BGND Total Muon BGND Muons Muon-Induced
Neutrons
Normal
Dongming Mei AH, preliminary