Transcript Assay and Acquisition of Radiopure Materials Principle Investigators Priscilla Cushman (University of Minnesota) Dongming Mei (University of South Dakota) Kara Keeter (Black Hills State.

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
Priscilla Cushman
University of Minnesota
DUSEL S4 Workshop
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
Priscilla Cushman
University of Minnesota
Reyco Henning
Jeff Martoff
Robert McTaggart
Esther Mintzer
Tullis Onstott
Andreas Piepke
Andrew Sonnenshein
John Wilkerson
DUSEL S4 Workshop
Oct 1, 2009 Lead, SD
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)
Priscilla Cushman
University of Minnesota
DUSEL S4 Workshop
Oct 1, 2009 Lead, SD
Why do we need
anweLBCF?
Why do
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
Priscilla Cushman
University of Minnesota
DUSEL S4 Workshop
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
Priscilla Cushmaneventually be part of the DUSEL AARM system?
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)
Priscilla Cushman
University of Minnesota
DUSEL S4 Workshop
Oct 1, 2009 Lead, SD
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)
Priscilla Cushman
University of Minnesota
DUSEL S4 Workshop
Oct 1, 2009 Lead, SD
4850 level = Facility for AARM (FAARM)
g,b,a screening and support infrastructure
rendered images from CNA
Engineering
Priscilla Cushman
University of Minnesota
DUSEL S4 Workshop
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.
Priscilla Cushman
University of Minnesota
DUSEL S4 Workshop
Oct 1, 2009 Lead, SD
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
Priscilla Cushman
University of Minnesota
DUSEL S4 Workshop
Oct 1, 2009 Lead, SD
Confirmed 4850 level
Define overall size and location
Yates Shaft
Existing Drifts
Small Lab Module
Standard Lab Modules
FAARM
Davis
Cavern
Project Scope (LM)
Project Scope (LC)
Expt
New Drifts
at 4850L
Large Cavity 1
New Bypass Drift
and Large Cavity
Utility Area
at 4850L
Staging
Area
New Winze
New Drift
to 5040L
Ross Shaft
#6 Winze
Priscilla Cushman
University of Minnesota
DUSEL S4 Workshop
Oct 1, 2009 Lead, SD
Confirmed 4850 level
Located at back of Module 2
Emergency Egress
Shielded
Clean
Prototyping
Assembly
New Winze
Expt
Main Entrance
Priscilla Cushman
University of Minnesota
DUSEL S4 Workshop
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
Priscilla Cushman
University of Minnesota
DUSEL S4 Workshop
Oct 1, 2009 Lead, SD
Ultra-sensitive Immersion Tank
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
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…
Priscilla Cushman
University of Minnesota
DUSEL S4 Workshop
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 …)
Priscilla Cushman
University of Minnesota
DUSEL S4 Workshop
Oct 1, 2009 Lead, SD
Milestones for the AARM Cooperative Agreement
Site Characterization and Simulation Studies
Priscilla Cushman
University of Minnesota
DUSEL S4 Workshop
Oct 1, 2009 Lead, SD
Milestones for the AARM Cooperative Agreement
Determining the parameters of the FAARM
Priscilla Cushman
University of Minnesota
DUSEL S4 Workshop
Oct 1, 2009 Lead, SD
Milestones for the AARM Cooperative Agreement
Translating this into a Conceptual Design
Priscilla Cushman
University of Minnesota
DUSEL S4 Workshop
Oct 1, 2009 Lead, SD