priscilla cushman dusel s4 workshop university of minnesota oct 1, 2009 lead, sd principle...

Priscilla Cushman DUSEL S4 WorkshopUniversity of Minnesota Oct 1, 2009 Lead, SD

Principle InvestigatorsPriscilla 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 ConsortiumCNA Consulting Engineers (Lee Petersen)Dunham Associates Miller Dunwiddie Architecture, Inc


Structure of AARM S4 Process

Conventional Design of the Facility for AARM by Engineering ConsortiumBased 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 AalsethHenning BackTim ClassenJodi Cooley-SekulaYuri Efremenko

Reyco HenningJeff MartoffRobert McTaggartEsther MintzerTullis Onstott

Andreas PiepkeAndrew SonnensheinJohn Wilkerson


International Scientific Advisory PanelLaura 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


• 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 centercan 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?


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 selectionPrototypes 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 institutionsLocal 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 sitee.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?


Points of Contact, Meeting Summary

We have filled out the docs contact form Spokesperson: P. CushmanAARM Engineer: L. PetersenEH&S Contact: K. KeeterE&O Coordinator: C. Keller

Liaison Engineer: S. MarksLiaison Scientist: Y-D Chan

Met with about 10 members of the AARM Scientific Collaborationplus Dave Plate and Steve Marks

Firmed up plans for FAARM design and determined locationDiscussed interface between AARM, Facilities, and the ExperimentsNew floor plan will be distributed in 2 weeks, need feedback in a monthRecast our “Program Infrastructure” spreadsheet into official docs form (2 weeks)


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)


4850 level = Facility for AARM (FAARM) screening and support infrastructure

rendered images from CNA Engineering


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 PIwhich labeled screeners will you use and for how long? Typical use of clean room, storage needs, machining needsProtoyping? Ultra-sensitive screening type, size, sensitivity.


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 systemNitrogen 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


Davis Cavern

Ross Shaft

Standard Lab ModulesYates Shaft

New Driftsat 4850L

Existing Drifts

StagingArea

New Driftto 5040L

Large Cavity 1

Project Scope (LM)Project Scope (LC)

#6 Winze

New WinzeNew Bypass Driftand Large Cavity

Utility Areaat 4850L

Small Lab Module

Confirmed 4850 levelDefine overall size and location

FAARM

Expt


New Winze

Confirmed 4850 levelLocated at back of Module 2

Expt

Shielded

Clean

Assembly

Prototyping

Main Entrance

Emergency Egress


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 requirementsstill needs to be done properly, but

General consensus that we go for the gamma reductionas well as the rock radioactivity 3 m water

e.g. commercial vendorDufrane Nucear Shieding


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 timescalebut 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


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 ElectroformingCoordinate 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 …)


Milestones for the AARM Cooperative Agreement Site Characterization and Simulation Studies


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


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

priscilla cushman dusel s4 workshop university of minnesota oct 1, 2009 lead, sd principle...

Documents

common low background

common shielding

low background experiments

common materials database

assay techniques

reference materials

new rd

dedicated facility