New developments in wide bandgap CdZnTe (CZT) semiconductor ...

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HUGE SOCIETAL NEED: Improved X- and gamma-ray detectors are required for many applications National and Homeland Security • Nonproliferation of nuclear materials • Secondary inspection for portals • Safeguards measurements • Forensics and attribution • Nuclear waste management Medical Imaging • SPECT, PET and CT scanners • Bone densitometers • Medical probes Basic science • Astrophysics • Gamma-Ray Spectroscopy • Synchrotron X-ray research Industrial imaging • Bore-hole logging • X-ray and gamma-ray cameras • XRF material analyses Variety of applications requires detectors with spectroscopic and imaging capabilities Long-term, widespread and unmet need for advanced detectors
Progress in CZT detector development CZT detectors have been proposed more that a decade ago with a goal to replace HPGe in the field applications Despite of significant progress in detector technologies and electronics we are still far from achieving this goal We believe, that today’s commercial CZT material have excessively high concentrations of the extended defects, which limit the size and performance of CZT detectors
Page 1 and 2: New developments in wide bandgap Cd
Page 3: Advantages of Cadmium Zinc Tellurid
Page 7 and 8: Spectra of 152 Eu source measured w
Page 9 and 10: Cadmium Zinc Telluride (CZT) detect
Page 11 and 12: φ32 mm ’89 φ50 mm ’94 0.6 kg
Page 13 and 14: CZT 11-1 seed loading procedure see
Page 15 and 16: CZT synthesis in rocking furnace
Page 17 and 18: CZT 10-1 results - grain structure
Page 19 and 20: Redlen’s more recent 100 mm diame
Page 21 and 22: 2. Operation principle of ionizatio
Page 23 and 24: 3. Defects in commercial CZT materi
Page 25 and 26: Motorized X-Y-Z translational stage
Page 27 and 28: An example of a stack of 100 images
Page 29 and 30: Twin boundaries decorated by Te inc
Page 31 and 32: Micro-scale X-ray mapping at BNL’
Page 33 and 34: Spatial resolution and flux of Sync
Page 35 and 36: Comparison between two detectors De
Page 37 and 38: 28 keV 1000 V, 50 mm step Response
Page 39 and 40: Prismatic punching dislocation patt
Page 41 and 42: 2x1.5 mm 2 Photograph of the etched
Page 43 and 44: 10 inches Two types of contrast: ge
Page 45 and 46: Subgrain boundaries exist in all co
Page 47 and 48: X-ray response mapping of the netwo
Page 49 and 50: X-ray maps of CPG Illuminating from
Page 51 and 52: Rejection of the incomplete charge
Page 53 and 54: Rejection of ICC
Page 55 and 56:
133 Ba source
Page 57 and 58:
Applications
Page 59 and 60:
Testing the array: raw data � Use
Page 61 and 62:
BNL develops camera for prostate ca
Page 63 and 64:
Medical - Future • $B/Yr market -
Page 65 and 66:
A High-Resolution MRI-Compatible SP
Page 67 and 68:
B A Animal PET scanner animal bed V
Page 69 and 70:
4.5 cm Digital readout PCB CdZnTe/C
Page 71 and 72:
Tomographic acquisition setup Radiu
Page 73 and 74:
Scientific Research • Astrophysic
Page 75 and 76:
CdZnTe gamma camera 32,000 4x4x2mm
Page 77 and 78:
Motivation for ProtoEXIST Implement
Page 79 and 80:
ProtoEXIST2 Detectors Crystal Units
Page 81 and 82:
Security & Surveillance • Nuclear
Page 83 and 84:
Detectors with electronics CZT Copl
Page 85 and 86:
The power of pixels! 20x20x15 cm 3
Page 87 and 88:
Motivation Dose rate monitoring net
Page 89 and 90:
� Silicon and CZT in one copper b
Page 91 and 92:
3 generations to reach optimal perf
Page 93 and 94:
Dual CdTe Medipix2 Flood Frames Si
Page 95 and 96:
Image Correction Demonstration of C
Page 97 and 98:
Conclusions � Quality and high co
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New developments in wide bandgap CdZnTe (CZT) semiconductor ...

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