| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Progressive Solutions to Improve Corrosion Resistance for Nuclear Waste Storage
|
| Presentation Title |
Neutron Microscope Based on Wolter Optics for Imaging Hydrogen Distribution in Glass |
| Author(s) |
Boris Khaykovich, Daniel S. Hussey , Suzanne Romaine, Kiranmayee Kilaru, Brian D. Ramsey |
| On-Site Speaker (Planned) |
Boris Khaykovich |
| Abstract Scope |
Neutron radiography is particularly suitable for elucidating the spatial distribution of hydrogen in samples with spatial resolution down to a few micrometers. However, neutron sources are inherently very weak, while neutrons are difficult to focus so that neutron imaging beamlines are built as pinhole cameras. While the spatial resolution scales as D/L (D~1 cm is the pinhole diameter and L~10 m is the pinhole-to-detector distance), the neutron fluence rate at the sample position scales as (D/L)2. Therefore, achieving a resolution of a few microns may require many hours of exposure precluding measurements of materials with fast hydrogen mobility or comparing samples with variable compositions. Focusing mirrors promise to solve these problems by improving the time resolution of the method by at least a factor of 1,000. I will describe the Wolter optics system that will be first available at NIST in 2022, and neutron imaging at the MIT Nuclear reactor. |