1. Assay and Acquisition of Radiopure Materials
Principle Investigators
Priscilla Cushman (University of Minnesota)
Dongming Mei (University of South Dakota)
Kara Keeter (Black Hills State University)
Richard Schnee (Syracuse University)
Engineering Consortium
CNA Consulting Engineers (Lee Petersen)
Dunham Associates
Miller Dunwiddie Architecture, Inc
Characterize radon, neutron, gamma, and alpha/beta backgrounds at Homestake
Develop a conceptual design for a common, dedicated facility for low background counting and other assay techniques.
Assist where appropriate in the creation of common infrastructure required to perform low background experiments.
Perform targeted R&D for ultra-sensitive screening and water shielding

2. Structure of AARM S4 Process
Conventional Design of the Facility for AARM by Engineering Consortium
Based on Information from the Users (YOU!)
Gleaned and organized by the Co-PIs
YOU are represented by the following “AARM Scientific Collaboration” who has already given feedback, but must continue to provide information as the process evolves.
Scientific Collaboration
Craig Aalseth
Henning Back
Tim Classen
Jodi Cooley-Sekula
Yuri Efremenko
Reyco Henning Jeff Martoff Robert McTaggart Esther Mintzer Tullis Onstott
Andreas Piepke
Andrew Sonnenshein
John Wilkerson

3. Integrate Effort with European Labs
The Synergy Workshops and Integrative Website were dropped: budget 1.3M  1.0M
(linking research fields and linking multiple sites)
Same thing happened in ILIAS Next process via reviewer comments
** Difficult to fund interdisciplinary projects **
But, we will still draw heavily from expertise in existing Low Background Facilities via
International Scientific Advisory Panel
Laura Baudis (Zurich University) Richard Ford (Queen’s University, SNOLab)
Gilles Gerbier (CEA Saclay) Gerd Heusser (Max Planck Institute, Heidelberg)
Andrea Giuliani (University of Insubria (Como), Coordinator of ILIAS Continuation) Mikael Hult (European Commission: JRC Inst. for Reference materials and Measurements)
Vitaly Kudryavtsev (University of Sheffield) Pia Loaiza (Laboratoire Souterrain de Modane)
Matthias Laubenstein (INFN, Gran Sasso Laboratory) Neil Spooner (University of Sheffield)

4. Why do we need a common Low Background Facility?
Why do we need an LBCF?
Why do we need a common Low Background Facility?
Cost effective sharing of resources, close to experiments
Unified scheduling tools and infrastructure will streamline counting and match users to the sensitivity and modality needed.
Common materials database and shared experience
Electronics pool, code repository, unified analysis system
Expert Technicians and Training center
can become a center for new R&D in screening and assay develops new field of low background techniques
Large enough to include on site clean machine shop, chemical services, radon-free storage and assembly areas, common shielding and shielding elements available

5. Why do we need other sites as well?
Urgency of screening: DUSEL experiments need to begin screening NOW
Design parameters are determined in part by material selection Prototypes are being built now Sanford is not yet up to speed, Multiple sites can help
Economy of scale only goes so far
Experiments are designed and built at local institutions Local on-site analysis/screening inexpensive access, quick turn-around, student training
Cooperative agreements with local industry, accelerators, commercial labs can generate user fees and foster synergies with other fields
Some specialty users may prefer a different site e.g. high security, different rock or bugs, different bkgds
There are no resources in the S4 to unify and facilitate multiple sites Can we identify funding source(s) to create Training Centers at existing sites (Kimballton, WIPP, Soudan, Oroville) Establish loan programs and jump start purchases of detectors the will eventually be part of the DUSEL AARM system?

6. Points of Contact, Meeting Summary
We have filled out the docs contact form
Spokesperson: P. Cushman AARM Engineer: L. Petersen EH&S Contact: K. Keeter
E&O Coordinator: C. Keller
Liaison Engineer: S. Marks Liaison Scientist: Y-D Chan
Met with about 10 members of the AARM Scientific Collaboration plus Dave Plate and Steve Marks
Firmed up plans for FAARM design and determined location Discussed interface between AARM, Facilities, and the Experiments
New floor plan will be distributed in 2 weeks, need feedback in a month Recast our “Program Infrastructure” spreadsheet into official docs form (2 weeks)

7. Facility for AARM (FAARM) Staged approach to cleanliness and shielding
Class 2000 clean room & Rn mitigation throughout.
Additional separate Class 100 (or 500) clean rooms (sample handling, assembly)
Shielded room with easy access
Additional shielding for screeners, Special water shield for sensitive applications.
Veto shield for the most sensitive applications and for Prototypes (e.g. dark matter)

8. 4850 level = Facility for AARM (FAARM)
g,b,a screening and support infrastructure
rendered images from CNA Engineering

9. Facility for AARM (FAARM)
Refinement of Design
New plan will be drawn, including first pass at sensitivities for each screener
Distribute to AARM Collaboration and all S4 PI which labeled screeners will you use and for how long? Typical use of clean room, storage needs, machining needs Protoyping? Ultra-sensitive screening type, size, sensitivity.

10. Confirmed 4850 level 4850-ft level
deep enough for ultra sensitive screening and dark matter prototype testing
close to experiments for easy access (drive in large items)
share water purification and cryogen infrastructure
Open Questions tend to be about duplication with facilities or experiments
Location and commonality of Water Purification and Cryogen system
Nitrogen liquifier and distribution system? !st stage of water purification for shield
Radon mitigation for the whole lab or just for us?
Additional Cu Electroforming probably required timescale of handing over the Majorana facility

11. Confirmed 4850 level Define overall size and location
Yates Shaft
Existing Drifts
Small Lab Module
Standard Lab Modules
FAARM
Project Scope (LM)
Project Scope (LC)
Davis
Cavern
Expt
New Drifts
at 4850L
Large Cavity 1
Staging
Area
New Winze
New Bypass Drift
and Large Cavity
Utility Area
at 4850L
New Drift
to 5040L
Ross Shaft
#6 Winze

12. Confirmed 4850 level Located at back of Module 2
Emergency Egress
Shielded
Clean
Prototyping
Assembly
New Winze
Expt
Main Entrance

13. Water Shield Design
Modular, stackable containers vs Steel frame support vs custom wall
We will move ahead quickly on vendor quotes
Simulation of thickness and sensitivity requirements still needs to be done properly, but
General consensus that we go for the gamma reduction as well as the rock radioactivity  3 m water
e.g. commercial vendor
Dufrane Nucear Shieding

14. Ultra-sensitive Immersion Tank
It is there because it needs to be! Goal: – g/g U/Th
Ideas, but no existence proof yet – include only a footprint for April 2010
Identity Crisis
I. A very pure water shield into which we put several high sensitivity screeners
or even whole prototype experiments (e.g. high pressure Xe or …?) or
II. A Sensitive Detector into which we dip large items that need whole body counting
LUX water tank may be available for purpose I at the right timescale but we need to plan our requirements – let Facilities integrate
Need both applications eventually
Explore a double tank or concentric tank solution more real estate required…

15. Other levels are also part of AARM
800’ level Storage of Materials (overburden and radon-free) copper, lead, small components
Pre-screeners and NAA gamma counters
Radiochemistry labs for NAA
Chemical Assay and/or Cu Electroforming
Coordinate with Majorana (e.g. might be at 4850’)
Define Surface Facilities
NAA receiving
Later additions may include ICPMS, Surface Characterization Lab (PIXE, SIMS, RBS, Auger …)

16. Milestones for the AARM Cooperative Agreement
Site Characterization and Simulation Studies

17. Milestones for the AARM Cooperative Agreement
Determining the parameters of the FAARM

18. Milestones for the AARM Cooperative Agreement
Translating this into a Conceptual Design