Radiation Induced Defects in High-Z Shielded Ytterbium Doped Fibers
Abstract
Studies of amorphous silica fibers bombarded with neutral particles indicate that both photons and neutrons have the same mechanism for creating defects, however rate of creation and aected wavelengths for each type is unclear [38] [39]. Some studies indicate that photon radiation induced attenuation (RIA) is higher than neutron RIA, while others indicate the reverse due to secondary effects by neutrons. Additionally, it appears that the two neutral particle radiation sources produce defects at significantly different rates despite using the same dose rate [39]. In comparing neutron dominant and dominant radiation sources for a similar total dose, the peak between 2-3 eV in the 6/125 YDF shifts approximately 0.4 eV, with a smaller defect peak deconvoluted around 3.2 eV in the neutron dominant radiation source results. The 20/400 YDF deconvolves to more Gaussian peaks, with a 0.1 eV shift for the 1-1.5 eV peak and a 0.15 eV shift for the 2-2.5 eV peak. Noticeably, the radiation dominant source data shows a peak around 1.6 eV signicantly more pronounced than in the neutron radiation dominant source dataset.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 2018
- Accession Number
- AD1056240
Entities
People
- Diana Cruz
Organizations
- Air Force Institute of Technology