T2DM2muographyproject
IgnacioLázaro Roche
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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
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PhDleadinginstitutions:
Collaborators:
Sponsors:
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Spareslides
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6°5°
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Spareslides
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