crytur single crystal scintillator screens
TRANSCRIPT
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Crytur Single CrystalScintillator Screens
Jan Touš, Karel Blažek
02/2011
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OutlineOutline
Company ProfileDifferent Scintillators ProductionSingle Crystal ScintillatorsYAG:Ce and LuAG:Ce Imaging ScreensQuality Inspection Applications
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Czech Republic80 km by highway from Prague, 600 km from GSI
CRYTUR CompanyCRYTUR Company
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CRYTUR Ltd. CRYTUR Ltd.
• 60 Employees • 2500 m2
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CRYTUR Company ProfileCRYTUR Company Profile
Crystal growthGrinding and polishingLaser rods and laser componentsCoating, sputteringSapphire profilesScintillation materials and detectors
- for High and Low Energies
68 Years Crystal Growth Tradition
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Scintillators ProductionScintillators Production
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Different ScintillatorsDifferent Scintillators
Single Crystal ScintillatorsPowder Scintillator ScreensPlastic Scintillator ScreensLPE Grown Scintillator Screens
Materials
• YAG:Ce, LuAG:Ce, CaF:Eu• YAP:Ce, BGO, CsI:Tl, LYSO• CdWO4, P43
Screens
• On Substrates (BK7, Quartz, …)• On Fiber Optics (FOP, Tapers)• Free Standing (on Rings)
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2525No/No5.37370YAP:Ce
94023Yes/No3.18435CaF:Eu
Scintillator abbreviation
Emission wavelength [nm]
Density[gcm-3]
Cleavage/ Hygroscopic
Photon Yield [ph/keV]
Decay [ns]
YAG:Ce 550 4.55 No/No 35 70LuAG:Ce 500-545 6.73 No/No 20 60
LYSO:Ce 420 7.1 No/No 32 41GSO:Ce 440 6.71 Yes/No 8-10 30-60CsI:Tl 565 4.51 No/Yes 54 >1000GOS:Tb 544 7.34 -/No 60 106
CWO 475 7.9 Yes/No 12-15 5000BGO 480 7.13 No/No 8-10 300
Application Depends on Physical PropertiesYAG and LuAG Single Crystal Screens are the Best Choice for
Low Energy High Resolution Imaging
Different ScintillatorsDifferent Scintillators
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Single Crystal ScintillatorsSingle Crystal Scintillators
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Single Crystal ScintillatorsSingle Crystal Scintillators
Application in Electron Microscopy, Alfa, Beta, and Gamma Radiation Detectors, Proton and Electron Beam Imaging Screens,X-Rays, UV and XUV Imaging Screens
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YAG:Ce and LuAG:CeYAG:Ce and LuAG:Ce
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YAG:Ce and LuAG:Ce Single CrystalsYAG:Ce and LuAG:Ce Single Crystals
YAG:Ce (Y3Al5O12)
Single Crystal
LuAG:Ce (Lu3Al5O12) Single Crystal
Czochralski Technique GrownHigh Radiation Hardness ~ 10^14 GyHigh Chemical and Mechanical StabilityGood Physical PropertiesLong Lifetime, etc.
YAG:Ce and LuAG: Ce Single Crystals Have the Optimal Properties for High Resolution Imaging
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YAG:Ce Excitation and Absorption Spectrain UV-Visible Region
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Excitation spectraYAG:Ce, RT, em = 530-550 nm
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YAG:Ce on FOP and CCDYAG:Ce on FOP and CCDImaging System for X-Rays, VUV, UV and Electrons
YAG:Ce plate 0.010 mm thickGlueFiber optics plateGlueCCD
Kodak CCD
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Scintillator ScreensScintillator Screens
YAG:Ce 5 Microns Thick
LuAG:Ce 20 Microns Thick
Free Standing 25 Microns
… on Taper
… on Substrates
YAG:Ce
Dia 50 mm
Dia 2 mm
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Scintillation screensScintillation screens
Detail
YAG:Ce with a Grid
LuAG:Ce with a Grid
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2/16/2011 18
Screen Surface LayersAnti-Reflection LayersReflection Layers Conductive LayersDifferent Compounds of Layers According the ApplicationOptimized to Screens Emission Wavelength
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Imaging ScreensQuality InspectionImaging ScreensQuality Inspection
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Quality InspectionQuality InspectionCrystal QualityRLE – Relative Luminescence EfficiencyOptical QualitySurface Quality
Automated Shape Inspection
Surface Quality InspectionClean Room Assembly
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Quality InspectionQuality Inspection
SEM Electron Microscope
X-Rays Experimental Setup
• Microfocus X-Rays Source
• CCD High Resolution Cameras
Defects DetectionDefects Detection
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Inspection in X-RaysInspection in X-RaysX-Rays Source• Microfocus Tube
• 10 – 160 kV
• Open Type
• Different Anode Materials
• Transmission / Directional Tube
• Spot Size < 1 µm / 5 µm
• Target Power 25 W / 280 W
• FOD ~ 0.25 mm / 4.7 mm
Transmission Tube Directional Tube
XWT-160-TC XWT-160-SE
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X-Rays Detector• CCD Peltier Cooled Cameras
• Low Noise Electronics
• High Spatial Resolution
• Different CCD Sizes
• Up to 16 Mpix 36 mm x 36 mm
• Exchangeable Scintillators
Inspection in X-RaysInspection in X-Rays
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Screens TestsScreens Tests• Golden Test Grid with 8 µm Wires
• JIMA Test Chart
• Tungsten Balls and Wires
• Carbon Fibers
Golden Grid, YAG:Ce 50µm, Cu anode, 60keV
JIMA Test Chart, YAG:Ce 50µm, Cu Anode, 60keV
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The grid in SEM
• Two Screens in Resolution Test
• GOS versus LuAG:Ce
Using P43 (GOS) 20 µm Thick Screen (2 µm Grain Size), 40kV, Cu Anode
Using LuAG:Ce 20 µm Thick Screen, 40kV, Cu Anode
Screens TestsScreens Tests
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YAG:Ce screenP43 (GOS) screen
Screens TestsScreens Tests
• Edge Test
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YAG:Ce or LuAG:Ce?YAG:Ce or LuAG:Ce?
LuAG:Ce
X-Rays Absorption in YAG:Ce and LuAG:Ce
Line Profile
YAG:Ce
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Low Energy X-RaysLow Energy X-Rays• Light Weight Materials
Carbon Fibers, 8 µm (at Visible Light)
Carbon Fibers in X-Rays, Using 50µm Thick YAG:Ce Screen (Cu Anode 60kV/ 2W) Polymer Fibers (the Same
Settings)
X-Rays Absorption in Carbon Fibers is Only 1% at 8 keV!
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ApplicationsApplications
• Low Energy Ionizing Radiation Detection and Imaging
• X-Rays, Electrons, XUV, UV, Photon Beams
• X-Rays Micro-Radiography
• NDT
• Science
• …
YAG:Ce, LuAG:Ce Screens
Mouse Brain, YAG:Ce, 40kV, Cu Anode
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We are ready to
• Help Customer with Detector Solution
• Design New Detectors
• Make the Detectors
• Cooperate in Projects
• Guarantee the Screen Quality
Customers SupportCustomers Support
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Thank you for your attention!
Visit us at our exhibition table for more information.
www.crytur.com
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LUMDETR 2006
ISLNOM4 2006
EXRS 2006
IWORID 2007
IEEE 2007
IEEE 2008
LUMDETR 2009
Results presentation
CERN Physics for Health 2010
IWORID 2010
NDT Hamburg 2010