Harry Nelson

UCSB

HUSEP Ft. Collins

Nov. 19, 2005

Lower Campus

11/19/05 Ft. Collins DUSEL Workshop 2

CDMSHNN

SNO Cavern110ft H x 75ft OD

RectangularHall

60ft L x 50ft W x 50ft H

Ladder-Labs15ft W x 10ft H20ft W x 10ft H

Cryo-Pit65ft H x 50ft OD

Underground LaboratoryConceptual Layout

White Paper Description in Progress

Excavation has begun under contract with Redpath

First new space in about 1 year

Laboratory complete in 2007

SNOLAB

ChemistryLab

11/19/05 Ft. Collins DUSEL Workshop 3

CDMSHNN

Clean Areas Overpressure – (all Class 2000)

(From Frasier Duncan)

H2S – air scrubbed

11/19/05 Ft. Collins DUSEL Workshop 4

CDMSHNN

Initial Suite of Experiments (Bernard Sadoulet)Deep Campus

Biology observ.

Deep Biology Drilling

3 Medium block experiments

PHYSICS

DMββSolar ν

TPC

11/19/05 Ft. Collins DUSEL Workshop 5

CDMSHNN

Xenon Infrastructure (Hanguo Wang)

11/19/05 Ft. Collins DUSEL Workshop 6

CDMSHNNBubble 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.

11/19/05 Ft. Collins DUSEL Workshop 7

CDMSHNN

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)

11/19/05 Ft. Collins DUSEL Workshop 8

CDMSHNN

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

11/19/05 Ft. Collins DUSEL Workshop 9

CDMSHNN

Dongming Mei & AH, preliminary

Dark Matter Sensitivity versus Depth

11/19/05 Ft. Collins DUSEL Workshop 10

CDMSHNN

Dongming Mei & AH, preliminary

Sensitivity versus Depth

Internal BGNDTotal Muon BGNDMuonsMuon-Induced Neutrons

Degenerate

Inverted

Normal