Low Background Counting Facility at Henderson DUSEL

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Low Background Counting Facility at Henderson
DUSEL
Lots of resources already exist, e.g. 1.
Homestake NUSL Reference Design Report
WBS 6.1 (Low-level counting facility) 2. NUSL
White Paper (Nico, Piepke, Shutt) Lots of
experience with ultra-sensitive low-level
experiments, e.g. Borexino and the Counting Test
Facility (Gran Sasso) SNO experiment BUT not
much experience in low background user
facilities Funding agencies and Historical
Precedent lead to each experiment providing its
own screening and purity methods Europe is ahead
in organization (ILIAS) And in sites/experiments
which are lending out their old facilities
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Any DUSEL installation of a full-fledged LBC
Facility consists of
A Suite of Devices with varying degrees of
cleanliness sensitivity Ultra-low bkgd
Emphasize sensitivity At least one
state-of-the-art whole body facility
10-13-10-15 g/g 238U/232Th multiple ports
and flexible staging Leaching/emanation lab
10-12 g/g Space for the next generation 10-16
10-17 g/g Novel techniques e.g. HPGe in LN
(a la GERDA) 10-12 g/g ? Traditional
low-bkgd counting techniques Emphasize
throughput. HPGe with low bkgd shielding and
cryostats 10-9 g/g extending to 10-12 g/g
with NAA Tracking MWPCs for surface beta, alpha
Proportional counters for single atom counting
of gas samples Pre-screeners NaI, less
sensitive HPGe, Radon monitors,
PLUS
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Any DUSEL installation of a full-fledged LBC
Facility consists of
Plus the infra-structure to support them
Dedicated staff offices for analysis
Sample preparation Underground prep and
storage Surface prep and chem lab (including
radiochem for NAA) Clean rooms Radon
mitigation Clean Machining Washing Station
Underground fabrication utilities Electrofor
med copper for cryostats and shielding Detector
assembly Provide Radon-free air, N2, and
LN Ultra-pure water, ultra-pure liquid
scintillator Optional Extensions include
Secure Lab for sensitive (of a different sort!)
applications Shielded Prototyping space
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Figure E-16 from the Homestake Reference Design
NAA Laboratory general environmental sample
handling
Secure lab
Emanation and leachinglaboratory
(TBA) Pool 2Gd-loaded liq. Scint for neutron
sensitivity or Mini-Borexino for U/Th down to
10-16 g/g
Pool 112 m cube ultra-pure water
Built-in liq. Scint acrylic thimble ports read
out by PMTs for U/Th down to 10-14 g/g
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CTF can lead the way to the next generation
ultra-sensitive whole body assay technique
Matthias Laubenstein (Borexino)Talk at Synergies
Workshop
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Nonetheless, Henderson needs to make some
choices Actual Layout SnoLab model or Nested
clean areas or Simple Tree Multiple screening
depths? Or staged downward trend? Accessibility
Outreach and Tourists National
Security Quality of Life for shift-takers Degr
ee of Centralization Model 1 Complementarity
with existing sites Exploit Deep Site
characteristics Model 2 Include all possible
facilities Exploit economy of scale Degree
of Availability Provide screening and assay to
the general public? Only to DUSEL
participants? Only to the experiment that
owns the equipment?
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DUSEL LBCF does not have to re-invent
the wheel Existing counting facilities in the
US Best technique may not be counting
ICPMS, AMS () RBS, PIXE, Auger,
SIMS Analysis centers at most Universities
User fees cheaper for University
faculty Commercial Labs Longer turn around,
more expensive, more standardized Use for
Others at most national labs (Oak Ridge, LANL,
BNL) A few shallow ? middle depth sites open for
users LBL Bldg72 and Oroville Dam now LOMO
at PNNL - soon Underground screening sites in
development stage, with some capacity now WIPP
SEGA running, MEGA/EXO installing Infrastructure
thru LANL. Soudan MINOS/CDMS running g
-screening capability in SOLO Protyping
facility with active muon veto shield Kimballton
LENS experiment slated for here Ties to NRL.
Possible Natl Security niche
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What needs to be done NOW? The DUSEL sites
have a vested interest in this so
How does HUSEP become involved?

• Screening for existing experiments (and
  security-related appl.)
• Underground testing of prototypes for DUSEL
  technology choices
• Screening for the proposed experiments
• Development of new, high purity materials
• RD now for a future DUSEL LBCF

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Existing Underground Infrastructure should be
Utilized in an Organized Way
Soudan
WIPP
Open for use40 x 30 x 100 surrounded by
active muon veto shield. Office space and
infrastructure exists
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Solution Propose NOW a multi-site LBCF with
proper integration and enough throughput to deal
with mounting screening and purity issues Part of
this is just building the community and
consensus It has already started
with Meetings Collaboration
DUSEL Solicitation 1 LRT 1st Topical
Workshop Sudbury, Canada. December 2004 2nd
Topical Workshop September 30 - October 3, 2006
- Aussois, FRANCE Synergies Workshop
Minneapolis, MN. July 2005 European ILIAS
already exists. North American Integration
Website (input from Synergies Workshop)
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PURPOSE 1. Institutions with at least some
capacity to serve users will be featured, along
with the detectors, sensitivities and support
facilities available. This should bring some
order to the diverse array of solutions and
provide users with means to schedule their
research needs. 2. Diverse research fields will
be able to learn from each other and create
collaborations based on low radioactivity
techniques they may have in common by exploring
this site. Links to the workshop talks will be a
first step since the talks will be given by
representatives of the various disciplines,
surveying the ways in which they currently use
these techniques and how they might benefit from
improved sensitivity in the future. To
participate in the creation of this community,
first register as a member (see bottom left
sidebar). You will be sent a member id number
which you can use to add resource links, edit
your contact information and add functionality to
this website. Once you have your id, login by
clicking on the "Add to Website" link on the
sidebar to the left.



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Research Portals


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North American Research Facilities

• Schedule a Sample
• To schedule a sample, check the available
  detectors and click here to submit your request.
• What's Available?
• HPGe
• Alpha counting
• Beta counting

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Member Profile for prisca_at_physics.umn.edu
Current Contact Information for Professor of
Physics Priscilla Cushman
Participate In the Integration Process