1. Priscilla Cushman DUSEL S4 Workshop University of Minnesota Oct 1, 2009 Lead, SD Principle Investigators Priscilla Cushman (University of Minnesota) Dongming Mei (University of South Dakota) Kara Keeter (Black Hills State University) Richard Schnee (Syracuse University) Assay and Acquisition of Radiopure Materials 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 Engineering Consortium CNA Consulting Engineers (Lee Petersen) Dunham Associates Miller Dunwiddie Architecture, Inc

2. Priscilla Cushman DUSEL S4 Workshop University of Minnesota Oct 1, 2009 Lead, SD 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. Priscilla Cushman DUSEL S4 Workshop University of Minnesota Oct 1, 2009 Lead, SD 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) 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

4. Priscilla Cushman DUSEL S4 Workshop University of Minnesota Oct 1, 2009 Lead, SD 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 Why do we need an LBCF? Why do we need a common Low Background Facility?

5. Priscilla Cushman DUSEL S4 Workshop University of Minnesota Oct 1, 2009 Lead, SD 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. Priscilla Cushman DUSEL S4 Workshop University of Minnesota Oct 1, 2009 Lead, SD 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. Priscilla Cushman DUSEL S4 Workshop University of Minnesota Oct 1, 2009 Lead, SD Facility for AARM (FAARM) Staged approach to cleanliness and shielding Class 2000 clean room & Rn mitigation throughout. Shielded room with easy access Additional separate Class 100 (or 500) clean rooms (sample handling, assembly) 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. Priscilla Cushman DUSEL S4 Workshop University of Minnesota Oct 1, 2009 Lead, SD 4850 level = Facility for AARM (FAARM)  screening and support infrastructure rendered images from CNA Engineering

9. Priscilla Cushman DUSEL S4 Workshop University of Minnesota Oct 1, 2009 Lead, SD 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. Priscilla Cushman DUSEL S4 Workshop University of Minnesota Oct 1, 2009 Lead, SD 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 Confirmed 4850 level Radon mitigation for the whole lab or just for us? Additional Cu Electroforming probably required timescale of handing over the Majorana facility

11. Priscilla Cushman DUSEL S4 Workshop University of Minnesota Oct 1, 2009 Lead, SD Davis Cavern Ross Shaft Standard Lab Modules Yates Shaft New Drifts at 4850L Existing Drifts Staging Area New Drift to 5040L Large Cavity 1 Project Scope (LM) Project Scope (LC) #6 Winze New Winze New Bypass Drift and Large Cavity Utility Area at 4850L Small Lab Module Confirmed 4850 level Define overall size and location FAARM Expt

12. Priscilla Cushman DUSEL S4 Workshop University of Minnesota Oct 1, 2009 Lead, SD New Winze Confirmed 4850 level Located at back of Module 2 Expt Shielded Clean Assembly Prototyping Main Entrance Emergency Egress

13. Priscilla Cushman DUSEL S4 Workshop University of Minnesota Oct 1, 2009 Lead, SD 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. Priscilla Cushman DUSEL S4 Workshop University of Minnesota Oct 1, 2009 Lead, SD Ultra-sensitive Immersion Tank 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… It is there because it needs to be! Goal: 10 -13 – 10 -14 g/g U/Th Ideas, but no existence proof yet – include only a footprint for April 2010

15. Priscilla Cushman DUSEL S4 Workshop University of Minnesota Oct 1, 2009 Lead, SD 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. Priscilla Cushman DUSEL S4 Workshop University of Minnesota Oct 1, 2009 Lead, SD Milestones for the AARM Cooperative Agreement Site Characterization and Simulation Studies

17. Priscilla Cushman DUSEL S4 Workshop University of Minnesota Oct 1, 2009 Lead, SD Milestones for the AARM Cooperative Agreement Determining the parameters of the FAARM

18. Priscilla Cushman DUSEL S4 Workshop University of Minnesota Oct 1, 2009 Lead, SD Milestones for the AARM Cooperative Agreement Translating this into a Conceptual Design