T2DM2muographyproject

IgnacioLázaro Roche

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T2DM2forMuographers 2017

1.ObjectivesofT2DM2project

ü Developmentofanon-destructivesystemusingmuonparticlesforimagingandmonitoringlargevolumesofmatter

§Reconstruction of muon tracks using only one detection plane

§Design, fine characterization and industrialization of a very compact detector

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1) LSBB§ Low background noise environment§ Layout of the galleries allowing to deploy the detectors easilybetween 0 and 518m deep

2) BRGM§ National geological survey aiming to respond to Geosciencesissues

§ Skills in a large array of applications (Geological investigation,Natural Hazards, Natural Resources…)

3) IRIS Instruments­ Private company providing geophysical equipment's all overthe world

­ Shared by BRGM and OYO company

2.Collaborationmembers

T2DM2’sinitiator LeaderinGeosciences

Skilledinsensorsdevelopment

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3.Targetedapplications

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Resourcescharacterization

Culturalheritage

Civilengineering Volcanology

Naturalhazard

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Main Muon detection technologies

4.Technology

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Muontomography

Visualtechnologies

Cloudchamber

Emulsiondetectors

Scintillators

Liquid

Plastic

Gaseousdetectors

Micropattern

Geiger-Müller

Wirechamber

GRPC

T2DM2detectorü Externaltriggerprovidedbyscintillatorü Compactandlightü Onlyonedetectionplaneallowsreconstructing

theparticletrackü Performance:

o Temporalresolution,fewnso Angularresolution,betterthan1° for

reconstructedtrackso 2Dresolution,betterthan1mm

T2DM2detector

Principles

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4.Technology

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Driftcathode

Micromesh

Ionization!

Ytracks

Xtracks

Resistive layer

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5.Openskymeasurements

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Detectorlocation

Comparison between the number of muonsexpected (according to Gaisser model with theparameters from A. Tang) and the muonsmeasured.

REFERENCEMEASUREMENT

Tangmodelvsmeasurement

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6.Outdoormeasurements

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Approximationofthe360ºviewaroundthedetectorwiththesameorientationastheuppergraphic

Detectorlocation

Notrackreconstructionareas Integrationtime=3h

𝑅𝑎𝑡𝑖𝑜 =𝑀𝑢𝑜𝑛𝑠𝑝𝑒𝑟𝑏𝑖𝑛𝑎𝑡𝑶𝒑𝒆𝒏𝒔𝒌𝒚𝒎𝒆𝒂𝒔𝒖𝒓𝒆𝑀𝑢𝑜𝑛𝑠𝑝𝑒𝑟𝑏𝑖𝑛𝑎𝑡𝑽𝒂𝒍𝒍𝒆𝒚𝒎𝒆𝒂𝒔𝒖𝒓𝒆

Higher valuesmeans biggerattenuation

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6.Outdoormeasurements

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Detectorlocation

SamedatasetaspreviousslideIntegrationtime=3h

𝑅𝑎𝑡𝑖𝑜 =𝑀𝑢𝑜𝑛𝑠𝑝𝑒𝑟𝑏𝑖𝑛𝑎𝑡𝑶𝒑𝒆𝒏𝒔𝒌𝒚𝒎𝒆𝒂𝒔𝒖𝒓𝒆𝑀𝑢𝑜𝑛𝑠𝑝𝑒𝑟𝑏𝑖𝑛𝑎𝑡𝑽𝒂𝒍𝒍𝒆𝒚𝒎𝒆𝒂𝒔𝒖𝒓𝒆

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7.Studysite

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RisksurveillanceWellknowntopograhy

• The detector is located at the base of the dam,inside the valve cabin.

• Monitoring:• Cabin temperature, atmospheric pressure

and humidity.• Water level, temperature and conductivity.• Local rain and wind.• High atmosphere pressure

DetectorlocationNarrowhillwithacastleonthetopandcrossingtunnelsunderneath

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7.Studysite- modelisation

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Water level at thebeginning of themeasurement

Topographicdata Digitalmodelforsimulation*

Detectorlocation

Detectorlocation

*ThankstoK.Jourde fromBRGMandmemberofT2DM2collaboration

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Concretedensityestimatedat2,4kg/L

Integrationtime=3d17h

8.Preliminaryresults

60°−60°

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9.Shorttermgoals

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üContinue acquiring data by the dam:Øto improve the data analysis algorithms (P & T dependence, track reconstruction algorithm…)Øto assess the variations of the water level (approx. 1cm per day)

üWork in the inverse problem to convert muon flux into density

üBuild a new set-up in the galleries of an out-of-service mine incollaboration with the CEA.ØTwo different MicroMegas based detectors measuring in parallel.

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10.Conclusion

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üRecently acquired capability to perform long-term measurementsüFirst campaign of measures out of the lab accomplished, fieldtransportability demonstratedüCurrently working in the inversion to compare the prediction from themodel against the acquired dataüThe data analysis shows that the trajectory reconstruction algorithmworks well…üBUT, still room for improving the efficiency and reduce instrumental noise.

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Acknowledgements

15

PhDleadinginstitutions:

Collaborators:

Sponsors:

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Spareslides

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6°5°

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Spareslides

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