Testing of time-of-flight neutron diffraction imaging using a high-resolution scintillator detector with wavelength-shifting fibers

2018 ◽  
Vol 551 ◽  
pp. 460-463 ◽  
Author(s):  
T. Kawasaki ◽  
T. Nakamura ◽  
W. Gong ◽  
K. Oikawa
Keyword(s):  
High Resolution ◽  
Neutron Diffraction ◽  
Time Of Flight ◽  
Diffraction Imaging ◽  
Wavelength Shifting Fibers ◽  
Scintillator Detector

scholarly journals High-resolution time of flight neutron diffraction and magnetization studies of spin reorientation and polar transitions in SmCrO3

2021 ◽  
Vol 103 (14) ◽  
Author(s):  
Tusita Sau ◽  
Poonam Yadav ◽  
Shivani Sharma ◽  
Rajamani Raghunathan ◽  
Pascal Manuel ◽  
...  
Keyword(s):  
High Resolution ◽  
Neutron Diffraction ◽  
Time Of Flight ◽  
Spin Reorientation ◽  
Resolution Time

scholarly journals High Resolution, Deep Imaging Using Confocal Time-of-flight Diffuse Optical Tomography

2021 ◽  
pp. 1-1
Author(s):  
Yongyi Zhao ◽  
Ankit Raghuram ◽  
Hyun Kim ◽  
Andreas Hielscher ◽  
Jacob T Robinson ◽  
...  
Keyword(s):  
High Resolution ◽  
Optical Tomography ◽  
Time Of Flight ◽  
Diffuse Optical Tomography ◽  
Deep Imaging

scholarly journals Through-Thickness Microstructure Characterization in a Centrifugally Cast Austenitic Stainless Steel Nuclear Reactor Primary Loop Pipe Using Time-of-Flight Neutron Diffraction

2021 ◽  
Vol 5 (2) ◽  
pp. 12
Author(s):  
Matthew M. Schmitt ◽  
Daniel J. Savage ◽  
James J. Wall ◽  
John D. Yeager ◽  
Chanho Lee ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Neutron Diffraction ◽  
Time Of Flight ◽  
Radial Distance ◽  
Ultrasonic Waves ◽  
Science Center ◽  
Los Alamos ◽  
Inspection Method ◽  
Centrifugally Cast

The US code of Federal Regulations mandates regular inspection of centrifugally cast austenitic stainless steel pipe, commonly used in primary cooling loops in light-water nuclear power plants. These pipes typically have a wall thickness of ~8 cm. Unfortunately, inspection using conventional ultrasonic techniques is not reliable as the microstructure strongly attenuates ultrasonic waves. Work is ongoing to simulate the behavior of acoustic waves in this microstructure and ultimately develop an acoustic inspection method for reactor inspections. In order to account for elastic anisotropy in the material, the texture in the steel was measured as a function of radial distance though the pipe wall. Experiments were conducted on two 10 × 12.7 × 80 mm radial sections of a cast pipe using neutron diffraction scans of 2 mm slices using the HIPPO time-of-flight neutron diffractometer at the Los Alamos Neutron Science Center (LANSCE, Los Alamos, NM, USA). Strong textures dominated by a small number of austenite grains with their (100) direction aligned in the radial direction of the pipe were observed. ODF analysis indicated that up to 70% of the probed volume was occupied by just three single-grain orientations, consistent with grain sizes of almost 1 cm. Texture and phase fraction of both ferrite and austenite phases were measured along the length of the samples. These results will inform the development of a more robust diagnostic tool for regular inspection of this material.

High-resolution multi-planar coherent diffraction imaging with multimode fiber source

2021 ◽  
Vol 140 ◽  
pp. 106530
Author(s):  
Yuanyuan Liu ◽  
Qingwen Liu ◽  
You Li ◽  
Junyong Zhang ◽  
Zuyuan He
Keyword(s):  
High Resolution ◽  
Multimode Fiber ◽  
Coherent Diffraction Imaging ◽  
Diffraction Imaging

High-resolution neutron diffraction study of microstructural changes in nanocrystalline ball-milled niobium carbide NbC0.93

2015 ◽  
Vol 109 ◽  
pp. 173-180 ◽  
Author(s):  
Anatoly M. Balagurov ◽  
Ivan A. Bobrikov ◽  
Gizo D. Bokuchava ◽  
Roman N. Vasin ◽  
Alexander I. Gusev ◽  
...  
Keyword(s):  
High Resolution ◽  
Neutron Diffraction ◽  
Diffraction Study ◽  
Niobium Carbide ◽  
Neutron Diffraction Study ◽  
Microstructural Changes
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