T2DM2 muography project - 東京大学

T2DM2 muography project

IgnacioLázaroRoche,PhDstudent,onbehalfofStéphaneGaffet,T2DM2project

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1. Objec8ves of T2DM2 project

ü Developmentofanon-destruc:vesystemusingmuonpar:clesforimagingandmonitoringlargevolumesofma>er

§ ReconstrucEonofmuontracksusingonlyonedetecEonplane

§ Design,finecharacterizaEonandindustrializaEonofaverycompactdetector

ü IniEatedin2010attheLowBackgroundNoiseLaboratory(LSBB)operatedbyCNRS(NaEonalFrenchResearchCenter).ü Member of CERN’s RD51 collaboraEon, which aims at facilitaEng thetechnologicaldevelopmentandapplicaEonofMicropaTernGasDetectors.ü Since 2015, BRGM (French Geological Survey) and IRIS Instruments(geophysicalequipmentmanufacturer)joinedthepartnership.ü Currentlytheteamiscomposedby8people;includingPhDs,engineers,aPhDstudentandpostdoctoralfellow.

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2. Context of the project

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1)  LSBB§ Lowbackgroundnoiseenvironment§ Layoutofthegalleriesallowingtodeploythedetectorseasilybetween0and518mdeep

2)  BRGM§ NaEonalgeologicalsurveyaimingtorespondtoGeosciencesissues

§ SkillsinalargearrayofapplicaEons(GeologicalinvesEgaEon,NaturalHazards,NaturalResources…)

3)  IRISInstruments­  Privatecompanyprovidinggeophysicalequipment'sallovertheworld

­  SharedbyBRGMandOYOcompany

3. Complementarity of partnership

T2DM2’siniEator LeaderinGeosciences

Skilledinsensorsdevelopment

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ü Theprojectstartedatlowstepofthetechnologicalreadinesslevel(TRL)inAcademicsector.

ü The partnership evolved including two othersmembers (BRGM and IrisInstruments).

ü  If the partnership succeeds in all technical issues, IRIS InstrumentswillinsurethenewdetectorcommercializaEon.

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4. From Academic Science to Industrial sector

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5. Targeted applica8ons

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ResourcescharacterizaEon

Culturalheritage

Civilengineering Volcanology

Naturalhazard

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6. Applica8ons and constraints

7T2DM2forMuographers2016

•  Landslideandvolcanoesmonitoring

•  CulturalheritageinvesEgaEon•  CivilinfrastructureinspecEon

Detectorlocatedatthe

surface

•  NaturalresourcesexploraEon•  Undergroundreservoirmonitoring

Detectorlocated

underground

•  InfluenceofothercosmicparEcles•  AtmosphericcondiEons

•  NarrowspacefordetectorlocaEon•  NaturalradioacEvity•  GasevacuaEon

Mainconstraints

•  Limitedpowersupply•  Environmentalparameters

variaEons•  Deploymentofmaterials

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MainMuondetec:ontechnologies

6. Technologies

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Muontomography

Visualtechnologies

Cloudchamber

Emulsiondetectors

ScinEllators

Liquid

PlasEc

Gaseousdetectors

MicropaTern

Geiger-Müller

Wirechamber

GRPC

T2DM2detector

ü  ExternaltriggerprovidedbyscinEllator

ü  Compactandlight

ü  OnlyonedetecEonplaneallowsreconstrucEng

theparEcletrack

ü  Performance:

o  TemporalresoluEon,fewnso  AngularresoluEon,beTerthan1°for

reconstructedtracks

T2DM2detector

Principles

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7. New Detector of T2DM2

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Drijcathode

Micromesh

IonizaEon!

Ytracks

Xtracks

ResisEvelayer

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8. Track reconstruc8on

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Rawdata

Points

Tracks

§  Measurement of the voltage on eachchannelwithpreciseEmeinformaEon

§  TheriseEmeprovidesanaccurateorigininEme of the event, essenEal for the TPCperformance

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8. Track reconstruc8on

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Rawdata

Points(2D)

Tracks

Low

Nois

e inte

r-D

iscip

linary

Underg

round S

cie

nce &

Technolo

gy

LS

BB

, U

MS

3538

UN

S/U

AP

V/C

NR

S/A

MU

/OC

A

15th RD51 collaboration meeting. WG2 - Physics

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Distribution on micromegas plan

y

x

Scintillatorposition

- Points built as the center of ADC counts of x and y cluster

In very good agreement with the scintillator position

ScinEllatorusedfortriggering

Cluster: Association of neighboring hit channels within a time window

§  muon projection in chamber hit 10 channels typically

§  it helps to minimize the false positives (less noise and artifacts)

A s s o c i a E o n o fsimultaneous clusterson X and Y axis to getthe posiEon on thedetecEonplane 11

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8. Track reconstruc8on

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Rawdata

Points

Tracks(3D)

MuonBy knowing: §  the electron drift speed in the TPC §  time of arrival of primary electrons

ê Reconstruction of the particle’s track

e-

TPC

AtCERNfacili:es

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9. Controlled source

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TestbeamfaciliEesatCERN

SurfacehomogeneityandparEcleposiEoning

0,1

1

10

100

370 380 390 400 410 420 430 440 450 460 470 480 490

Gain

Thou

sand

s

VoltageResis:ve

MuonsΦ=0,θ=0

CalculusMuonsΦ=20,θ=0

Gainmeasurements

Testsperformed:§  DetecEonefficiency§  Influenceofthetrigger§  SensiEvitytootherparEcles(πande-)§  Electroniclatency§  TrackreconstrucEon

AtLSBBfacili:es

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10. Cosmic recordings

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Surfacemeasurements

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Understanding of (θ,φ) map – all pos

moutain

→ Less muons on mountain side !The chart represents a 2D projection of the hemisphere above the detector in polar coordinates

Histogram with the number of muon detected coming from a given origin

Thehighlightedareacorrespondstothe“shadow”ofthemountain

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11. Conclusion

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ü  The development of a compact detector based on MicromegastechnologyissEllrunning

ü Resultsoffirsttestedkeyperformanceindicatorsareencouraging

ü Needofcomplementaryexperimentalteststovalidatethedesign

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Acknowledgements

16

PhDleadingins:tu:ons:

Collaborators:

Sponsors:

T2DM2forMuographers2016