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

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Synchrotron Radiation at NSLS What is a synchrotron? It is a source of tiny beams of very bright x-rays, UV, visible and IR light NSLS is a user facility http://www.nsls.bnl.gov/users/usersguide/bt-gu.asp
Micro-scale X-ray mapping at BNL’s NSLS To investigate the role of precipitates and other non-uniformities in single-crystal CZT, we performed X-ray scans of CZT samples by using a highly-collimated X-ray beam. Minimum beam size = 10 mm Quasi-monochromatic beam 85 keV (bulk effects) Monochromatic beam 30 keV (surface effects & bulk). For each location of X-ray beam, we collected a pulse-height spectrum and evaluated a peak position, which represents the device response from a small area illuminated by X-rays. The results of scans were plotted as 2-D maps of device response versus beam position. Brookhaven Science Associates U.S. Department of Energy CZT planar detector 10-µm pinhole Synchrotron Radiation Translation stage 10x10-mm 2 beam
Page 1 and 2: New developments in wide bandgap Cd
Page 3 and 4: Advantages of Cadmium Zinc Tellurid
Page 5 and 6: Progress in CZT detector developmen
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: Twin boundaries decorated by Te inc
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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