| Neutron Imaging and Applications | 2 |
|---|
| Preface | 6 |
| Contents | 13 |
| Contributors | 15 |
| Section A | 17 |
|---|
| Introduction to the Neutron | 18 |
| 1.1 Introduction | 18 |
| 1.2 Interactions with Matter and Cross Sections | 20 |
| References | 26 |
| Neutron Sources and Facilities | 28 |
| 2.1 Introduction | 28 |
| 2.2 Neutron Production | 30 |
| 2.2.1 Reactors | 30 |
| 2.2.2 Proton Accelerator-Based Sources | 30 |
| 2.3 Moderation Mechanisms for Reactors and Spallation Sources | 36 |
| 2.3.1 Reactor Neutron Sources | 36 |
| 2.3.2 Pulsed Spallation Neutron Sources | 37 |
| 2.4 Comparison of Source Types | 41 |
| 2.5 Neutron Facilities | 42 |
| 2.6 Smaller Neutron Sources for Imaging and Other Applications | 42 |
| References | 44 |
| Neutron Optics | 46 |
| 3.1 Introduction | 46 |
| 3.2 Source Optics | 47 |
| 3.3 Reflection Optics: Neutron Guides | 48 |
| 3.4 Diffraction Optics | 51 |
| 3.5 Refraction Optics | 55 |
| 3.6 Polarisation Optics | 55 |
| References | 60 |
| Neutron Detectors for Imaging | 61 |
| 4.1 Overview of Neutron Converters | 61 |
| 4.2 Data Acquisition for Continuous and Time-Dependent Applications | 63 |
| 4.3 Photographic Film Detectors | 63 |
| 4.4 Scintillator and Storage Phosphor Detectors | 65 |
| 4.5 Gas Detectors | 70 |
| 4.6 Solid-State Detectors | 72 |
| 4.7 Conclusion | 74 |
| References | 74 |
| Section B | 78 |
|---|
| Neutron Radiography | 79 |
| 5.1 Introduction | 79 |
| 5.2 A History of Neutron Radiography | 80 |
| 5.3 Basic Principles | 81 |
| 5.3.1 Sources | 81 |
| 5.3.2 Moderation | 82 |
| 5.3.3 Collimation | 82 |
| 5.3.4 Detectors | 83 |
| 5.4 Image Analysis | 84 |
| 5.5 Direct Radiographic Method | 85 |
| 5.6 Indirect Radiographic Method | 87 |
| 5.7 Track-Etch Method | 87 |
| 5.8 Electronic Imaging Methods | 88 |
| 5.9 Nonfilm Imaging Methods | 89 |
| 5.10 Standards | 90 |
| 5.11 Conclusions | 90 |
| References | 91 |
| Neutron Tomography | 93 |
| 6.1 Introduction | 94 |
| 6.2 Geometric Considerations and Spatial Resolution | 95 |
| 6.3 Mathematical Foundations of (Neutron) Tomography | 98 |
| 6.3.1 Scanning | 98 |
| 6.3.2 Image Reconstruction | 102 |
| 6.4 Experimental Techniques and Results | 106 |
| 6.4.1 Energy-Dispersive and Bragg-Edge Radiography and Tomography | 106 |
| 6.4.2 Real-Time Radiography | 109 |
| 6.4.3 Phase Contrast, Refraction, and Small-Angle Tomography | 109 |
| 6.4.4 Refraction and Small-Angle Scattering Tomography | 112 |
| 6.5 Outlook | 118 |
| References | 118 |
| Mathematics of Neutron Imaging | 121 |
| 7.1 Introduction | 121 |
| 7.2 Neutron Image Formation and Resolution Analysis | 124 |
| 7.2.1 Resolution Modeling | 124 |
| 7.2.2 System Performance Measurement | 126 |
| 7.3 Volumetric Imaging | 129 |
| 7.3.1 Filtered Backprojection | 130 |
| 7.3.2 Iterative Reconstruction | 133 |
| 7.3.3 Computer Platforms | 136 |
| 7.4 Conclusions and Application | 136 |
| References | 138 |
| Neutron Phase Imaging | 140 |
| 8.1 Introduction | 140 |
| 8.2 Principles | 141 |
| 8.2.1 Phase Shift Versus Attenuation | 141 |
| 8.2.2 Phase Tomography | 143 |
| 8.2.2.1 Reconstruction from Phase Shift Projections | 144 |
| 8.2.2.2 Reconstruction from Phase Gradient Projections | 145 |
| 8.2.2.3 Reconstruction from Laplacian Phase Projections | 146 |
| 8.3 Experimental Methods | 147 |
| 8.3.1 Crystal Interferometer | 147 |
| 8.3.2 Refraction-Based Techniques | 150 |
| 8.3.2.1 Crystal Analyzer-Based Techniques | 150 |
| 8.3.2.2 Grating Interferometers | 151 |
| 8.3.3 Propagation-Based Techniques | 156 |
| 8.4 Coherence Requirements | 158 |
| References | 161 |
| Thermal Neutron Holography | 163 |
| 9.1 Introduction | 163 |
| 9.2 Atomic-Resolution Holography | 165 |
| 9.3 Neutrons | 166 |
| 9.4 Neutron Holography and K Lines | 167 |
| 9.5 Theory | 168 |
| 9.6 Reconstruction of the Diffraction Patterns from S Wave Scatterers | 170 |
| 9.7 Inside Source Neutron Holography | 171 |
| 9.8 Inside Detector Neutron Holography | 174 |
| 9.9 Holographic Reconstruction from Multiple Incoherent Scatterers | 176 |
| 9.10 Holography and Poorly Crystallized Proteins | 176 |
| 9.11 The Future | 178 |
| 9.12 Concluding Remarks | 178 |
| References | 178 |
| Novel Imaging Techniques: Polarized Neutrons and Neutron-Based Magnetic Resonance Imaging | 181 |
| 10.1 Neutron Spin Polarized Imaging of Magnetic Field | 181 |
| 10.2 Spin Echo Imaging | 185 |
| 10.3 Prospects for Neutron-Probed Magnetic Resonance Imaging | 191 |
| References | 196 |
| Section C | 198 |
|---|
| Neutron Imaging for the Hydrogen Economy | 199 |
| 11.1 Introduction |