3rd ILIAS Annual Meeting JRA1. LBT-DUSLilias.in2p3.fr/ilias_site/meetings/documents/ILIAS... · 3rd...

113rd ILIAS Annual Meeting. LNGS, Feb3rd ILIAS Annual Meeting. LNGS, Feb--March 2006 March 2006 JRA1 web page JRA1 web page http://http://www.unizar.es/iliaswww.unizar.es/ilias

3rd ILIAS Annual Meeting3rd ILIAS Annual MeetingJRA1. LBTJRA1. LBT--DUSLDUSLLow background techniques Low background techniques for deep underground sciencesfor deep underground sciences

•• Reminder of goalsReminder of goals

•• Present statusPresent status

•• Work in progressWork in progress


JRA1 JRA1 WPsWPsWP1 WP1 –– MeasurementMeasurement of backgrounds in the EU underground labsof backgrounds in the EU underground labs

WP2 WP2 –– Development of a library of background Development of a library of background simulation codessimulation codes

WP3 WP3 –– R&DR&D for for UL background techniquesUL background techniques and and facilitiesfacilities in the labsin the labs

WP4 WP4 –– R&DR&D on on radioradio--puritypurity of materials and purification techniquesof materials and purification techniques

JRA1 JRA1 participantsparticipantsContractors:Contractors:UNIZAR, CEA, CNRS, INFN, USFD, MPIK, TUM, JRCUNIZAR, CEA, CNRS, INFN, USFD, MPIK, TUM, JRC

NonNon--contractors:contractors:RAL, FZK, Dortmund, Silesia, Henryk Niewodniczanski, Pol. MilanoRAL, FZK, Dortmund, Silesia, Henryk Niewodniczanski, Pol. Milano


Management structure of JRA1Management structure of JRA1Activity coordinatorsActivity coordinators Julio Morales/JosJulio Morales/Joséé M. M. CarmonaCarmona (LSC)(LSC)Deputy coordinatorDeputy coordinator Nicola Ferrari (LNGS)Nicola Ferrari (LNGS)

WP1. Background measurements in the deep underground sites:WP1. Background measurements in the deep underground sites:CoordinatorCoordinator Nicola Ferrari (LNGS)Nicola Ferrari (LNGS)Deputy coordinatorsDeputy coordinators Marisa Marisa SarsaSarsa/Gloria /Gloria LuzLuzóónn (LSC)(LSC)

WP2. Background simulations:WP2. Background simulations:CoordinatorCoordinator Gloria Gloria LuzLuzóónn/Susana /Susana CebriCebriáánn (LSC)(LSC)Deputy coordinatorDeputy coordinator VitalyVitaly KudriavtsevKudriavtsev (IUS)(IUS)

WP3. Low background facilities:WP3. Low background facilities:CoordinatorCoordinator Matthias Matthias LaubensteinLaubenstein (LNGS)(LNGS)Deputy coordinatorDeputy coordinator Jean Louis Jean Louis ReyssReyss (LSM)(LSM)

WP4 . WP4 . RadiopurityRadiopurity of the materials:of the materials:CoordinatorCoordinator PiaPia LoaizaLoaiza (LSM)(LSM)Deputy coordinatorDeputy coordinator Lino Lino MiramontiMiramonti (LNGS)(LNGS)


MeetingsMeetingsWorking group meetings (last year):Working group meetings (last year):-- April 2005 (Valencia, N3&N6 meeting): WP2April 2005 (Valencia, N3&N6 meeting): WP2-- May 2005 (Gran Sasso Open Day): WP1, WP4May 2005 (Gran Sasso Open Day): WP1, WP4-- September 2005 (Zaragoza, IDEA meeting): WP2September 2005 (Zaragoza, IDEA meeting): WP2-- September 2005 (Zaragoza, TAUP conference): WP2, WP4September 2005 (Zaragoza, TAUP conference): WP2, WP4-- March 2006 (Gran Sasso, ILIAS General Meeting): WP3, WP4March 2006 (Gran Sasso, ILIAS General Meeting): WP3, WP4

JRA1 General Meetings:JRA1 General Meetings:•• 10th September 2004, Edinburgh10th September 2004, Edinburgh•• 12th January 2005, Modane12th January 2005, Modane•• 14th February 2006, Paris14th February 2006, Paris


JRA1 main web pageJRA1 main web page

It contains:It contains:

A description of the JRA1 activity and general documentsA description of the JRA1 activity and general documentsNews and deadlinesNews and deadlinesJRA1 list of participantsJRA1 list of participantsInformation on next and previous meetingsInformation on next and previous meetingsLinks to other ILIAS activities closely related to JRA1Links to other ILIAS activities closely related to JRA1Working group pagesWorking group pages:: participants, documents, databases, participants, documents, databases, reference papers, activitiesreference papers, activities……

http://http://www.unizar.es/iliaswww.unizar.es/ilias


SUMMARY OF ACTIVITIESSUMMARY OF ACTIVITIES


WP1 WP1 activitiesactivities: : ((coordinatedcoordinated by INFN)by INFN)

Participants:Participants:INFN, CEA, CNRS, UNIZAR, USFD, RAL, Milano, Silesia, Henryk N.INFN, CEA, CNRS, UNIZAR, USFD, RAL, Milano, Silesia, Henryk N.

Key objective:Key objective:To To measuremeasure the environmental background components in the four the environmental background components in the four underground sites in a coherent and underground sites in a coherent and coordinatedcoordinated way.way.

The background components in the deep underground sites:The background components in the deep underground sites:

1.1. EnvironmentalEnvironmental gamma gamma raysrays

2.2. RadioactivityRadioactivity ofof rock, concrete, etc.rock, concrete, etc.

3.3. NeutronsNeutrons

4.4. Rn monitoring in the air and in the waterRn monitoring in the air and in the water

5.5. MuonsMuons


WP1 WP1 –– Background Background measurementsmeasurements•• AnalysisAnalysis and and interpretationinterpretation of data from a of data from a first surveyfirst survey of of measurements:measurements:

BoulbyBoulby measurements of measurements of γγ spectrumspectrum (PF (PF Smith et Smith et alal, , AstroparticleAstroparticle PhysicsPhysics 2222(2005), 409) (2005), 409) withwith unshieldedunshielded 2kg 2kg GeGedetectordetector comparedcompared to Monte Carlo.to Monte Carlo.

Results and conclusions:Results and conclusions:

•• Calculated nCalculated n--production from rock (production from rock (NaClNaCl): ): ~3E~3E--8 g8 g--11 ss--11..•• Neutron flux from rock + plasterboard wall: Neutron flux from rock + plasterboard wall: 2.76E2.76E--6 cm6 cm--22 ss--11

•• plasterboard wall reduces neutron flux by plasterboard wall reduces neutron flux by ~8%; main neutron background dominated ~8%; main neutron background dominated by average U/by average U/ThTh concentration in rock.concentration in rock.


WP1 WP1 –– Background measurementsBackground measurements•• A second survey A second survey of background measurements:of background measurements:Recent Recent TARI fundedTARI funded study of study of radonradonmonitoring and monitoring and gammagamma measurements with measurements with a portable a portable HPGeHPGe--detector at detector at BoulbyBoulby::J.KeiselJ.Keisel & & J.DordaJ.Dorda ((InstInst. Phys., U. . Phys., U. SilesiaSilesia, , Katowice, Katowice, PolandPoland), ), AugAug 2005:2005:

•• Typical integrated Typical integrated γγ counting rate:counting rate: 20 20 –– 24 24 counts kgcounts kg--11 ss--11

•• Typical Typical 222222Rn concentrationRn concentration in all tested in all tested locations: 2.5 locations: 2.5 ±± 1.6 Bq/m1.6 Bq/m33

BOX "2" - start 5.08.05 13:04 stop 7.08.05 13:04

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WP1 WP1 –– Background measurementsBackground measurements•• A second survey A second survey of background measurements:of background measurements:Measurements of Measurements of γγ spectrumspectrum in various locations at in various locations at LNGSLNGS with a with a portable 16 kg portable 16 kg NaINaI ((TlTl) detector,) detector,controlled via a USB connection to a laptop computer controlled via a USB connection to a laptop computer

ResolutionResolution (FWHM) (FWHM) @ 1173.23 keV = 5.6%@ 1173.23 keV = 5.6%@ 1132.51 keV = 6.1%@ 1132.51 keV = 6.1%

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WP1 WP1 –– Background measurementsBackground measurements•• A second survey A second survey of background measurements:of background measurements:Neutron Neutron background measurements at background measurements at BoulbyBoulby with NUTS: a with NUTS: a 6.5L 6.5L GdGd--loaded loaded scintillatorscintillator detector. detector. TwoTwo--pulsepulse signaturesignature(proton recoils followed by gammas from (proton recoils followed by gammas from neutron capture) is used to neutron capture) is used to distinguish distinguish neutron events.neutron events.

nthermal + 155,157Gd → 156,158Gd* → 156,158Gd + γ´s

60ppb U, 130ppb ThComparison withComparison with MC simulationsMC simulations


WP1 WP1 –– Background measurementsBackground measurements•• A second survey A second survey of background measurements:of background measurements:AtAt BoulbyBoulby also DRIFTalso DRIFT--IIaIIa –– a 1ma 1m33 (167g) low pressure CS(167g) low pressure CS22, negative ion drift , negative ion drift TPC detectorTPC detector is being used to determine the is being used to determine the neutron background.neutron background. NeutronNeutron--induced recoils produce distinctive high induced recoils produce distinctive high dE/dxdE/dx tracks. tracks.


WP1 WP1 –– Background measurementsBackground measurements•• A second survey A second survey of background measurements:of background measurements:AtAt LNGSLNGS a set of cells filled with BC501A a set of cells filled with BC501A liquid liquid scintillatorscintillator is operating since last summer:is operating since last summer:–– spectrum and intensity of the spectrum and intensity of the neutron fluxneutron flux (fast component)(fast component)–– possible possible fluctuationsfluctuations with time of the with time of the neutron intensityneutron intensity–– correlationscorrelations with other with other environmental parametersenvironmental parameters

Spurious events

e- (γ)

p (n)


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(Bq/

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WP1 WP1 –– Background measurementsBackground measurements•• A second survey A second survey of background measurements:of background measurements:

New New (preliminary)(preliminary) RnRnmeasurements atmeasurements at LSCLSC


WP1 WP1 –– Background measurementsBackground measurements•• Future plans:Future plans:

–– MuonMuon and neutronand neutron measurements at new measurements at new LSCLSC

–– MuonMuon--induced neutroninduced neutron investigation with investigation with GdGd--lined liquid lined liquid scintillatorscintillator atatBoulbyBoulby

–– FollowFollow--up of up of neutronneutron measurements atmeasurements at LNGSLNGS

–– GammaGamma measurements by the Silesia group at measurements by the Silesia group at BoulbyBoulby,, ModaneModane and and CanfrancCanfranc using two portable using two portable GeGe detectorsdetectors

–– Radon monitoringRadon monitoring at all four labsat all four labs

–– Analysis Analysis of second survey of background measurementsof second survey of background measurements


WP2 WP2 activitiesactivities: : ((coordinatedcoordinated by UNIZAR by UNIZAR andand USFD)USFD)

Participants:Participants:INFN, CEA, CNRS, UNIZAR, USFD, TUM, RAL, Dortmund, FZKINFN, CEA, CNRS, UNIZAR, USFD, TUM, RAL, Dortmund, FZK

Key objective:Key objective:To To produceproduce a reliable a reliable Monte Carlo libraryMonte Carlo library of simulation codes for of simulation codes for the the interpretation of data and for planning future experiments.interpretation of data and for planning future experiments.

N3N3--BSNSBSNS JRA2(IDEA) JRA2(IDEA) WP3WP3--B1B1

JRA1JRA1--WP2WP2

Background Background Simulation, Simulation,

NeutronNeutron--ShieldShieldand and MuonMuon--VetosVetos

Study on Study on CosmogenicCosmogenic

Induced ActivityInduced Activity


WP2 WP2 –– Monte Carlo library of simulation codesMonte Carlo library of simulation codes•• Neutron production from U/Neutron production from U/ThTh contamination:contamination:

SOURCES SOURCES code gives neutron flux and energy spectrumcode gives neutron flux and energy spectrum–– ModifiedModified to include alphas with to include alphas with E>6.5 E>6.5 MeVMeV–– Updated libraryUpdated library of (of (αα,n) cross sections at code repository ,n) cross sections at code repository

Similar production rates Similar production rates found for found for ModaneModane and and BoulbyBoulby rock (1.3 rock (1.3 n/g/yn/g/yand 1.5 and 1.5 n/g/yn/g/y) despite ) despite higher radioactivity levels higher radioactivity levels in in ModaneModane: : lower (lower (αα,n,n) ) reaction thresholds in reaction thresholds in NaClNaCl

R. Lemrani et al., to be published in NIMA [arXiv:hep-ex/0601030]


WP2 WP2 –– Monte Carlo library of simulation codesMonte Carlo library of simulation codes•• Propagation of low energy neutrons:Propagation of low energy neutrons:

Propagation of low energy neutrons through Propagation of low energy neutrons through rock, leadrock, lead and and hydrocarbon hydrocarbon moderator has been compared for moderator has been compared for GEANT4, GEANT3GEANT4, GEANT3 and and MCNPX MCNPX using the using the same neutron inputssame neutron inputs and and geometry benchmarkgeometry benchmark




R. Lemrani et al., to be published in NIMA [arXiv:hep-ex/0601030]NaCl Modane

MaximumMaximum differencesdifferences betweenbetween codescodes ~15~15--20%20%

GEANT4 GEANT4 inelasticinelastic cross cross sectionssections onon ClClcorrectedcorrected

SmallerSmaller neutronneutron flux in flux in ModaneModane duedue toto waterwatercontentcontent in rockin rock

Flux Flux enhancementenhancement (50%, 30%) (50%, 30%) duedue totobackscatteringbackscattering ofof neutronsneutrons whenwhen consideringconsideringreal real cavernscaverns

AtAt rock rock boundaryboundary ––




AfterAfter PbPb + CH+ CH22 ––

~50 g/cm~50 g/cm22 shouldshould suppresssuppress lowlow energyenergy neutronneutronflux flux fromfrom environmentenvironment by more by more thanthan 6 6 ordersorders ofofmagnitudemagnitude

Summarizing…

GoodGood agreementagreement betweenbetween GEANT4GEANT4 andandMCNPXMCNPX forfor propagationpropagation ofof lowlow energyenergyneutronsneutrons: :

•• afterafter correctioncorrection ofof bugbug in in inelasticinelastic cross cross sectionssections forfor ClCl in in GEANT4GEANT4 librarylibrary

•• mainmain conclusionsconclusions do do notnot dependdepend onon codecode


WP2 WP2 –– Monte Carlo library of simulation codesMonte Carlo library of simulation codes•• Production of neutrons by Production of neutrons by muonsmuons::ComparisonsComparisons betweenbetween GEANT4GEANT4 andand FLUKAFLUKA: : yieldsyields, , energyenergyspectrumspectrum, lateral , lateral distributiondistribution, , dependancedependance onon materialmaterialSee H. M. Araujo et al., Nucl.Instrum.Meth. A545 (2005) 398-411; M. Bauer et al., Proc. IDM2004, p. 494; M. Horn, Valencia meeting April 2005; M. Bauer, Valencia meeting April 2005.

AgreementAgreement withinwithin a factor ~2 (a factor ~2 (eveneven betterbetter forfor somesome materialsmaterialsandand energiesenergies), ), althoughalthough FLUKA FLUKA predictionprediction isis alwaysalways higherhigher

PendingPending problemproblem:: somesome experimentalexperimental resultsresults disagreedisagree withwithGEANT4/FLUKA GEANT4/FLUKA predictionspredictions, , beingbeing thethe measuredmeasured neutronneutronproductionproduction significantlysignificantly higherhigher thanthan in in calculationscalculations

–– ProblemProblem forwardedforwarded toto GEANT4 GEANT4 collaborationcollaboration–– Data Data fromfrom experimentsexperiments (LVD, SNO, (LVD, SNO, KamLANDKamLAND, , BorexinoBorexino CTF) CTF) wouldwould be be welcomewelcome toto check check neutronneutron productionproduction by by muonsmuons–– DedicatedDedicated experimentexperiment toto measuremeasure neutronneutron flux flux inducedinduced by by muonsmuonsin in leadlead??


WP2 WP2 –– Monte Carlo library of simulation codesMonte Carlo library of simulation codes•• CosmogenicCosmogenic activation of materials:activation of materials:1.1. CollectionCollection ofof availableavailable datadata onon productionproduction cross cross sectionssections fromfrom thethe

literatureliterature andand nuclear nuclear databasedatabase librarieslibraries

2.2. AnalysisAnalysis ofof computationalcomputational codescodes forfor n/p n/p activationactivation: Monte : Monte CarloCarlo ororsemiempiricalsemiempirical codescodes

S. Cebrián et al, TAUP2005

ExcitationExcitation functionfunction by by nucleonsnucleons ofof 6868GeGe in in natural Genatural Ge


WP2 WP2 –– Monte Carlo library of simulation codesMonte Carlo library of simulation codes•• CosmogenicCosmogenic activation of materials:activation of materials:1.1. CollectionCollection ofof availableavailable datadata onon productionproduction cross cross sectionssections fromfrom thethe

literatureliterature andand nuclear nuclear databasedatabase librarieslibraries

2.2. AnalysisAnalysis ofof computationalcomputational codescodes forfor n/p n/p activationactivation: Monte : Monte CarloCarlo ororsemiempiricalsemiempirical codescodes

3.3. ComparisonComparison of of calculationscalculations with with experimentalexperimental data when availabledata when available

DeviationsDeviations factorsfactors F F betweenbetween availableavailable measuredmeasured productionproduction cross cross sectionssections andand differentdifferent calculationscalculations: : rangerange fromfrom ~1.5 ~1.5 toto ~2.5~2.5


WP2 WP2 –– Monte Carlo library of simulation codesMonte Carlo library of simulation codes•• CosmogenicCosmogenic activation of materials:activation of materials:SomeSome preliminarypreliminary conclusionsconclusions

SinceSince::

1.1. productionproduction cross cross sectionssections by by neutronsneutrons andand protonsprotons atat lowlow energiesenergies (<200 (<200 MeVMeV) are ) are significantlysignificantly differentdifferent in in mostmost cases cases

2.2. protonproton flux flux atat lowlow energyenergy isis negligiblenegligible atat sea sea levellevel

thethe followingfollowing wayway ofof evaluatingevaluating thethe excitationexcitation functionsfunctions isis proposedproposed::

–– atat lowlow enegyenegy,, cross cross sectionssections specificallyspecifically calculatedcalculated forfor neutronsneutrons (MENDL (MENDL librarylibrary, HMS, HMS--ALICE)ALICE)

–– atat mediummedium--highhigh energiesenergies,, semiempiricalsemiempirical YIELDX YIELDX calculationscalculations

ComparisonsComparisons ofof estimatedestimated productionproduction ratesrates usingusing thisthis reciperecipe withwithmeasurementsmeasurements in Ge in Ge andand Cu are Cu are goodgood forfor somesome productsproducts, , deviationsdeviationsup up toto factor 3 in factor 3 in manymany casescases


WP2 WP2 –– Monte Carlo library of simulation codesMonte Carlo library of simulation codes•• GEANT4:GEANT4:

Contact has been established between the GEANT4 Collaboration anContact has been established between the GEANT4 Collaboration and the d the underground physics community in ILIASunderground physics community in ILIAS

• Production of µ-induced neutrons in high-Z materials

• Propagation of Low Energy neutrons

• Inelastic scattering of neutrons

• Interactions of high-energy muons

• Isotope production

TTo o gogo furtherfurther thanthan justjust thethe useruser feedback feedback toto solvesolve bugsbugs andand smallsmallproblemsproblems…… which on the other hand is very which on the other hand is very importantimportant!!

•• ProblemProblem withwith inelasticinelastic cross cross sectionssections forfor neutronsneutrons onon ClCl solvedsolved

•• PatchPatch availableavailable by by Luciano Luciano PandolaPandola forfor bugbug forfor simulationsimulation ofofdede--excitationexcitation gammas in gammas in inelasticinelastic processprocess Ge(n,nGe(n,n’’)Ge*)Ge*

•• BugBug foundfound onon inelasticinelastic cross cross sectionssections ofof 6262Ni Ni forfor ((n,pn,p) in ) in 6262CuCu

solved in newG4NDL3.8 !


WP2 WP2 –– Monte Carlo library of simulation codesMonte Carlo library of simulation codes•• Library of codes:Library of codes:

WebWeb--site:site: http://www.unizar.es/ilias/wp2Back/wp2BackSim.htmhttp://www.unizar.es/ilias/wp2Back/wp2BackSim.htm(most of the information also available at N3 website)(most of the information also available at N3 website)FTP repository:FTP repository: http://www.unizar.es/ilias/JRA1/09.htmhttp://www.unizar.es/ilias/JRA1/09.htmunder password, ask account at under password, ask account at [email protected]@unizar.es, , [email protected]@unizar.es

–– General informationGeneral information about codes, links to code webabout codes, links to code web--sites, sites, access to some codes.access to some codes.

–– ModificationsModifications to codes:to codes:–– Updated version of Updated version of SOURCESSOURCES with new cross sectionswith new cross sections–– Interface between Interface between GEANT4GEANT4 and and SOURCES4ASOURCES4A–– Interface between Interface between MUSUN MUSUN and and GEANT4 GEANT4

–– ExamplesExamples


WP3 WP3 activitiesactivities: : ((coordinatedcoordinated by INFN by INFN andand MPIK)MPIK)

Participants:Participants:INFN, CEA, CNRS, UNIZAR, USFDINFN, CEA, CNRS, UNIZAR, USFD

Key objectives:Key objectives:•• Construction and upgrading of Construction and upgrading of ultra low background facilitiesultra low background facilities(ULBF)(ULBF) in the four underground labs forming an EUin the four underground labs forming an EU--coordinated coordinated service for applications in rare event physics and other fields service for applications in rare event physics and other fields of of worldworld--wide value.wide value.

•• Implementation of Implementation of newnew techniquestechniques to deal with the background: to deal with the background: active and passive shielding, veto systems, particle discriminatactive and passive shielding, veto systems, particle discrimination ion techniques, fragmentation of calorimeter detectors, control and techniques, fragmentation of calorimeter detectors, control and suppression of radon levels...suppression of radon levels...

•• Study of the feasibility of Study of the feasibility of fabricationfabrication of detectors and materials of detectors and materials underground.underground.


WP3 WP3 –– Low background facilitiesLow background facilitiesLow background lab at Low background lab at BoulbyBoulby

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•• Class 1000 clean room.Class 1000 clean room.

•• Floor area ~70mFloor area ~70m22..

•• 0.5 tonne swing crane.0.5 tonne swing crane.

•• RADRAD--7 radon detector7 radon detector operational.operational.

•• NaINaI –– based detectorbased detector in place and operational.in place and operational.

•• HPGeHPGe detectordetector operational (operational (PbPb/Cu castle under /Cu castle under construction).construction).


WP3 WP3 –– Low background facilitiesLow background facilitiesLow background lab at Low background lab at BoulbyBoulby

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Castle for Castle for HPGeHPGe detectordetectorcurrently under construction currently under construction (8cm OFHC Cu, surrounded by (8cm OFHC Cu, surrounded by 15 cm 15 cm PbPb).).


WP3 WP3 –– Low background facilitiesLow background facilitiesNew low background facilities at New low background facilities at GranGran SassoSasso

•• Development of new generation of Development of new generation of HPGeHPGe detectorsdetectors for ultra for ultra lowlow--level applications level applications

Two new ultra low-level detectors developed in the MPI-K of Heidelberg arrived in Gran Sasso (GeMPI-3 in Nov. 2005, GeMPI-4 in Feb. 2006); shielding design is under preparation; future improvements include re-design of sample handling (glove box, Rn tight sealing), improvement of DAQ and/or electric supply,…


WP3 WP3 –– Low background facilitiesLow background facilitiesNew low background facilities at New low background facilities at GranGran SassoSasso

•• Development of new generation of Development of new generation of HPGeHPGe detectorsdetectors for ultra for ultra lowlow--level applications level applications

•• SetSet--up of up of ultra lowultra low--level scintillation counter systemlevel scintillation counter system

•• Ultra lowUltra low--level gas counting (GNO counting lab)level gas counting (GNO counting lab)New space in hall A available


WP3 WP3 –– Low background facilitiesLow background facilitiesNew low background developments at New low background developments at ModaneModane

•• Development of a Development of a low background low background GeGe detectordetector in collaboration in collaboration with Canberrawith Canberra--EurisysEurisys (France)(France)

GeGoal:Goal: Reduce the background by one Reduce the background by one order of magnitudeorder of magnitude for for EEγγ < 600keV, < 600keV, withwitha a resolutionresolution atat 122 122 keVkeV ≤≤ 750 750 eVeV..

CharacteristicsCharacteristics::CrystalCrystal:: Surface 5000 mmSurface 5000 mm22

ThicknessThickness 30 mm30 mm

Planning:Planning:Command Command begginingbeggining ofof MarchMarch8 to 12 8 to 12 monthsmonths for for realizationrealization


WP3 WP3 –– Low background facilitiesLow background facilitiesNew copper electroforming facility at New copper electroforming facility at CanfrancCanfranc

PUMP

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SO CuS O 4H2 4

Copper Electroforming Overview VoltageSupply

Filter andPump

ElectronicControl System

ElectroliticBath


WP3 WP3 –– Low background facilitiesLow background facilitiesNew copper electroforming facility at New copper electroforming facility at CanfrancCanfranc

Initial stepsInitial steps After appropriate After appropriate tuningtuning of of current density, current density, rotation speed rotation speed and and rotation direction:rotation direction:


WP3 WP3 –– Low background facilitiesLow background facilitiesNew New CanfrancCanfranc Underground Laboratory (LSC)Underground Laboratory (LSC)


WP3 WP3 –– Low background facilitiesLow background facilities

New New CanfrancCanfranc Underground Laboratory (LSC)Underground Laboratory (LSC)

RailwayRailway tunneltunnel

RoadRoad tunneltunnel

LABORATORY SCHEMATIC VIEWLABORATORY SCHEMATIC VIEW

ServicesServices,,cleanclean roomsrooms andand officesoffices

ToTo CERN CERN 650 650 kmkm

OldOld laboratorylaboratory20 x 5 m (h=4,5 m)20 x 5 m (h=4,5 m)

MainMain hallhall40 x 15 m (h=12 m)40 x 15 m (h=12 m)

LowLow--background background lablab15 x 10 m (h=8 m)15 x 10 m (h=8 m)


WP4 WP4 activitiesactivities: : ((coordinatedcoordinated by LSM)by LSM)

Participants:Participants:INFN, CEA, CNRS, UNIZAR, USFD, JRCINFN, CEA, CNRS, UNIZAR, USFD, JRC

Key objectives:Key objectives:-- CollectCollect new (and old) new (and old) datadata on radioactive contamination and on radioactive contamination and cosmogenic activation of materials used in rarecosmogenic activation of materials used in rare--event physics event physics experiments and ultraexperiments and ultra--low background instrumentationlow background instrumentation

-- Development and test of Development and test of purificationpurification techniquestechniques to improve the to improve the radioradio--purity of materials.purity of materials.


Database Database (http://radiopurity.in2p3.fr/):(http://radiopurity.in2p3.fr/):

WP4 WP4 –– RadiopurityRadiopurity of materialsof materials

Measurements from gamma spectroscopy from:Edelweiss

ROSEBUDANAISCAST

Measurements from ICPMS, Neutron Activation Analysis from:UKDM

Measurements on 222Rn by Rn emanation from:Borexino


WP4 WP4 –– RadiopurityRadiopurity of materialsof materialsOther activities:Other activities:•• Measurements of cosmogenic activationsMeasurements of cosmogenic activationsData collection, MC simulations, and direct measurements of Data collection, MC simulations, and direct measurements of radioisotope production in materials (coop. WP3 of IDEA)radioisotope production in materials (coop. WP3 of IDEA)•• Measurements on radiopurity of materialsMeasurements on radiopurity of materialsCrossCross--check with reference samples in preparationcheck with reference samples in preparation IAEA 315 - GeMI

effMC/effEXPE [keV]

1.092614.5

1.032204

1.161764.5

1.201460.8

1.141120.3

1.11969.1

1.07911.2

1.23609.3

1.19583

1.12351.9

1.03338.2

1.12295.2

IAEA 315Marine sedimentGeMI detector

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