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Mee#ng wiki is found at h2ps://zzz.physics.umn.edu/lowrad/mee#ng8 Click on the “Detailed Agenda” and upload your talks there
AARM Collabora#on Mee#ng at SDSM&T
AARM Community and Collabora#ve Tools (P. Cushman) Discussion of what the community needs on website. Task assignment and priori9za9on
Dark Ma2er infrastructure priori#es (R. Schnee) Resource-‐sharing to/from broader community informed by these priori9es.
0νββ background infrastructure priori#es (J. Detwiler)
SURF Tours leave promptly at 2 pm
2-‐5:30 is a G2 DM mee=ng (LZ + SuperCDMS) Hisega Room
Introduc#on Today
May 21 (Thursday Morning) Bump Lounge, Surbeck Center. Gotomee#ng All talks provide bullet points for discussion. Unless otherwise designated, assume 15 min for the talk and 5 minutes for discussion. Discussion topics that require more 9me should be noted by the working group leaders and revisited during the parallel sessions. 8:30 Screening
Surface Screening with XIA (J. Cooley) Large volume screening detector (J. Reichenbacher) Beta Cage (R. Schnee) Ultratrace polymer analysis via ICP-‐MS (I. Arnquist) Low radon clean rooms (R. Bunker) Update on the BHUC (B. Mount -‐ remote)
10:15 Coffee 10:45 Radiogenics, alpha-‐n
Code comparisons and cross sec#ons (S. Scorza) Neutron-‐channel reac#on codes (C. Zhang)
11:25 Simula=ons GEANT4 status and prospects (D. Wright) FLUKA vs Geant (A. Kennedy) Depth Requirements for G3 LAr (A. Hime -‐ remote) Cosmogenic Ac#va#on codes (D.M. Mei)
May 21 (Thursday Adernoon)
2:00 Neutrons Bump lounge Neutral par#cle simula#ons for PICO-‐2L (20 min) (A. Robinson) Veto shield and neutron correla#ons. Data access invita#on (A. Villano) Gadolinium neutron-‐capture gammas in Geant4 (Y. Chen) Soudan Liquid Scin#llator detector (10 min) (C. Zhang)
3:20 Coffee 3:50 -‐ 5:30 Working Groups
Cleanliness protocol, Surface Contamina#on & Radon Plateout Leaders: R. Bunker, J. Cooley (Bump Lounge) Priori#es in simula#on and neutron background es#ma#on Leaders: A. Villano, D. Wright (Hisega Room: access code 1626019#)
5:30 – 6:00 Report from working groups – Integra#on discussion (Bump Lounge) 7:00 Group Dinner at Kathmandu
Communica=on and Collabora=on on common issues related to
Assay and Acquisi=on of Radiopure Materials Priscilla Cushman
University of Minnesota
The Model and Funding of AARM have evolved 2009-‐12: NSF grant (DUSEL S4) • Characterize backgrounds at all levels of Homestake • Design a common low background coun9ng facility • Develop common screening tools (R&D as needed) 2012-‐14: Cooperate to help understand and mi#gate backgrounds. Simula=on recognized as a major “infrastructure”
Validate and improve current simula#on tools Major advances in GEANT4 treatment of cosmogenic neutrons Con#nued improvements in (alpha,n) physics and cross-‐sec#ons
Background characteriza=on more broadly defined as Community Materials Assay Database Neutron benchmarking (data vs sim) Integra#on/Promo#on of exis#ng assay resources around the world and the development of a unified plan to increase availability
“Integra=ve Tools for Underground Science” Principle Inves#gators Priscilla Cushman (University of Minnesota) Jodi Cooley (Southern Methodist University) Toni Empl (University of Arkansas, Li2le Rock) Angela Reise2er (Evansville University) Richard Schnee (Syracuse University ! SDSM&T)
• Cosmogenic Simula#on Group • Universal Materials Database
• Radiogenic Cross Sec#on Working Group
• FLUKA-‐Geant4 Compara#ve Study Group
• Neutron Benchmarking Data Group
Funding model: NSF Grant for Specific Tasks iden#fied by the community as high priority,
but not covered directly by the experiment.
AARM is Organized by working group. Bi-‐annual workshops combine talks on new developments with Working Group sessions devoted to work and planning.
Snowmass Community Planning 2013: APS Div. of Par=cles and Fields planning exercise for HEP
Resulted in a strong case for Underground Infrastructure in the main document and in accompanying white papers.
However, momentum lagged in the face of budget reali#es Underground Space is a “Laboratory Capability” “Experimental needs worldwide far outstrip current assay capability. Opera#on as a user facility across mul#ple sites with exis#ng exper#se is the most efficient use of resources and personnel.” “There is enough U.S. infrastructure space for the future if exis#ng U.S. underground labs are maintained. Substan#al past agency investment and future leverage of state, university, private and other agency (e.g., non-‐prolifera#on) funds make it cost effec#ve and a2rac#ve to maintain these sites for smaller experiments, generic R&D, and as elements of a centrally managed materials assay consor#um.”
A DOE-‐proposed Workshop (summer 2014) to define Low Background Infrastructure was delayed
The G2 Down-‐Select and a reduced budget changed the landscape
US agencies look to the 2 major dark ma2er experiments to quan#fy needs Other DM experiments are considered G3 R&D 0νββ is considered G3 and not well-‐integrated into the bigger picture
In response, LZ and SuperCDMS must coordinate background needs.
March mee#ng at PNNL, Second mee#ng today at SDSM&T AARM’s role is to provide tools to facilitate coopera#on within G2, but also to
broaden par#cipa#on to other experiments both US and interna#onal. Natural Partnership with LRT.
LRT conferences for en#re underground community Couple with planning for interim working groups
AARM Going forward
AARM Going forward March 2014: Workshop at FNAL to iden#fy the highest priority items. Enable AARM to con#nue to facilitate exchange of ideas and foster new proposals
Integra=ve Website with o All relevant publica#ons and links organized in one place
Including all the AARM workshop talks and the LRT talks/proceedings o Contact informa#on and scheduling tools for woldwide assay centers
Including HPGe, Surface assay, ICPMS, NAA etc o Community Assay Database, including hooks from the assay centers o GEANT/FLUKA/MCNP code tools, code benchmarking and updates o Nuclear Databases, alpha-‐n, SOURCES4 etc o Cleaning and Handling Protocols. Standardize Assay Prep o Cosmogenic Ac#va#on, underground storage, transport shielding o Data on radon plateout and diffusion in various materials AND the work/computa#on/research that has to be done to populate those pages! e.g. Perform experiments to quan#fy radon plateout and diffusion in many materials
Develop new surface screening techniques Do neutron benchmark experiments of hadronic showers underground
Assay and Acquisition of Radiopure Materialsa cooperative approach to low radiation techniques and sensitive background measurement
Home
Community
Facilities and
Scheduling:
Detectors info
Assay request
Storage request
Community Assay
Database
Background Studies
Laboratory Materials
Clean-handling
Procedures
Resources:
Publications
AARM presentations
LRT presentations
Go to Lowrad Wiki
Interdisciplinary
Research Portals
The purpose of this website is to share knowledge and
resources across the community of those involved in
low-radioactivity experimental techniques. The tasks
covered include
1. Coordinating users and providers of sensitive
assay facilities
2. Linking to information on availability of radiopure
materials
3. Sharing knowledge concerning backgrounds in
low-background experiments
NEWS:
The next AARM meeting is May 20-21, 2015. It will beheld right after the Conference on Science at SURFhosted at the South Dakota School of Mines &Technology.
Summary agenda on the AARM wiki and copied below.For more detail see the full agenda.
May 20 (Wednesday)12:30-1:45 Discussion over box lunch:
AARM (website and other common tools)
G2 collaboration infrastructure priorities
0νββ background infrastructure
2:00-5:00 SURF tour or LZ-SuperCDMS meetingSuggestions? Send them to [email protected] and [email protected]
The AARM Integra=on Website
Rota#ng picture and contact informa#on for Labs & Experiments
Home Page
The AARM Integra=on Website
Facili#es and Scheduling: Detector Info What the Assay Facility Manager submits Up to date informa#on on screening available at labs. Form defines relevant informa#on and sorts it
The AARM Integra=on Website Facili#es and Scheduling: Assay or Storage Request What the user submits Check out the available assay from Detector Info Fill out request form – goes to the contact listed Storage request also available
The AARM Integra=on Website Resources: Easy reference for relevant papers Links to LRT and AARM presenta#ons Add your own papers
The AARM Integra=on Website Step 1: TENDL vs EMPIRE cross sec#ons comparison TENDL 2011 and 2012 have been considered as the USD website inputs. TENDL is a nuclear data library (validated) which provides the output of the TALYS nuclear model code system. EMPIRE cross sec#on are the input libraries of SOURCES4 Step 2: USD website vs SOURCES4 calcula#ons: compare the radiogenic neutron spectra coming from both codes.
Compiled plots and data from AARM studies Portals to other relevant websites
The AARM Integra=on Website Compiled plots and data from AARM studies Portals to other relevant websites
The AARM Integra=on Website Register your name and find others with common interests.
AARM recognized 10 years ago the need for an Assay Database with an easy-‐to-‐use interface to enter new data and to search for radiopure materials, vendors, etc.
The Majorana database (J. Loach) was chosen as a template The more globally used, the more useful for everyone. • Began by entering legacy data:
~300 assays; data from ILIAS, EXO and XENON100
• Now have ~ 1000 assays, primarily historical. • Database is being used by SuperCDMS and DarkSide, LZ evaluating it
• In the process of adding features to the software for easier distributed use.
Discussion Our funding supported specific projects which are now being collected on the integra#on website. It also supported twice-‐a-‐year workshops to share resources and informa#on But AARM Scien#fic Collabora#on has always been a loose collec#on of scien#sts involved in low-‐background studies… This will con#nue
Website is our organiza#onal tool What do you need?? • Radiopurity.org How can we grow the database?
Balance between proprietary vs open? Geant4 material tools?
• Facility informa#on (requires maintenance by manager)
Requests from users (requires prompt response and screener availability)
Discussion What do you need?? • Resources: U#lity of one-‐stop shopping
Hard to maintain – needs the community to populate it Need eyeballs so that your paper gets extra exposure there
• Community: How do we construct a forum that doesn’t get hijacked? Chat rooms? Topical collabora#ve portals? Adver#se your new project or proposal and look for collaborators New ideas discussion thread?
• Background studies: What else should be there? Do you want your link there?
• Is this sustainable with no funding? Probably only if the experiments themselves find this useful and contribute manpower and individuals find it useful OR we could lobby for minimal funding as a group How much $$ ? Who are the proposers?
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