scholarly journals Photosensitivity of Ga2O3 Schottky diodes: Effects of deep acceptor traps present before and after neutron irradiation

APL Materials ◽  
2020 ◽  
Vol 8 (11) ◽  
pp. 111105 ◽  
Author(s):  
E. B. Yakimov ◽  
A. Y. Polyakov ◽  
I. V. Shchemerov ◽  
N. B. Smirnov ◽  
A. A. Vasilev ◽  
...  
Keyword(s):  
Neutron Irradiation ◽  
Schottky Diodes ◽  
Deep Acceptor ◽  
Before And After

scholarly journals Micromagnetic Characterization of Operation-Induced Damage in Charpy Specimens of RPV Steels

2021 ◽  
Vol 11 (7) ◽  
pp. 2917
Author(s):  
Madalina Rabung ◽  
Melanie Kopp ◽  
Antal Gasparics ◽  
Gábor Vértesy ◽  
Ildikó Szenthe ◽  
...  
Keyword(s):  
Neutron Irradiation ◽  
Pressure Vessel ◽  
Operating Conditions ◽  
Magnetic Characteristics ◽  
Pressure Vessel Steel ◽  
Training Procedure ◽  
Vessel Steel ◽  
Before And After ◽  
The Individual ◽  
Magnetic Adaptive Testing

The embrittlement of two types of nuclear pressure vessel steel, 15Kh2NMFA and A508 Cl.2, was studied using two different methods of magnetic nondestructive testing: micromagnetic multiparameter microstructure and stress analysis (3MA-X8) and magnetic adaptive testing (MAT). The microstructure and mechanical properties of reactor pressure vessel (RPV) materials are modified due to neutron irradiation; this material degradation can be characterized using magnetic methods. For the first time, the progressive change in material properties due to neutron irradiation was investigated on the same specimens, before and after neutron irradiation. A correlation was found between magnetic characteristics and neutron-irradiation-induced damage, regardless of the type of material or the applied measurement technique. The results of the individual micromagnetic measurements proved their suitability for characterizing the degradation of RPV steel caused by simulated operating conditions. A calibration/training procedure was applied on the merged outcome of both testing methods, producing excellent results in predicting transition temperature, yield strength, and mechanical hardness for both materials.

Anomalous Scatter of Forward Current-Voltage Characteristics of He+-Irradiated Ni/4H-SiC Schottky Diodes

2016 ◽  
Vol 858 ◽  
pp. 749-752 ◽  
Author(s):  
Anatoly M. Strel'chuk ◽  
Viktor V. Zelenin ◽  
Alexei N. Kuznetsov ◽  
Joseph Tringe ◽  
Albert V. Davydov ◽  
...  
Keyword(s):  
Series Resistance ◽  
Degradation Mechanism ◽  
Schottky Diodes ◽  
Defect Structures ◽  
Induced Current ◽  
Forward Current ◽  
Current Voltage ◽  
Before And After ◽  
Current Voltage Characteristics

A study of forward current-voltage characteristics of Ni/4H-SiC Schottky diodes (SDs) before and after irradiation with He+ ions revealed features that characterize defect structures and reveal the degradation mechanism of the diodes. These features are the presence of excess currents of certain type in the unirradiated SDs, their appearance in forward-biased originally ideal SDs, and a >10 orders of magnitude scatter of the series resistance of the SDs upon their irradiation with He+ ions. A model of localized defect-induced current paths (shunts) in the form of unintentionally produced SDs with the substrate is suggested.

The neutron irradiation effects on the temperature dependencies of the electrical conductivity of nanosilicon particles

2017 ◽  
Vol 31 (28) ◽  
pp. 1750257 ◽  
Author(s):  
Elchin Huseynov ◽  
Aydan Garibli
Keyword(s):  
Electrical Conductivity ◽  
Neutron Flux ◽  
Neutron Irradiation ◽  
Silicon Nanoparticles ◽  
Activation Energies ◽  
Radiation Defects ◽  
Irradiation Effects ◽  
Active Radiation ◽  
Before And After ◽  
Effects Of Temperature

The effects of temperature and neutron irradiation on the silicon nanoparticles have been studied at different frequencies. It has been defined that additional electro-active radiation defects occur in the silicon nanomaterial after neutron irradiation. Therefore, the change of neutron flux at the interval of [Formula: see text]–[Formula: see text] increases the conductivity of nanosilicon. Activation energies of the silicon nanoparticles were calculated for 10 different constant frequencies according to Arrhenius approach before and after neutron irradiation. The mechanism of electrical conductivity which explains results has been established.

X-ray diffraction study of BaTiO3 single crystals before and after fast-neutron irradiation

2015 ◽  
Vol 60 (5) ◽  
pp. 620-628 ◽  
Author(s):  
A. I. Stash ◽  
S. A. Ivanov ◽  
S. Yu. Stefanovich ◽  
A. V. Mosunov ◽  
V. M. Boyko ◽  
...  
Keyword(s):  
Diffraction Study ◽  
Fast Neutron ◽  
Single Crystals ◽  
Neutron Irradiation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Fast Neutron Irradiation ◽  
Before And After

Characterization of SINTEF 3D diodes with trenched-electrode geometry before and after neutron irradiation

2020 ◽  
Vol 15 (02) ◽  
pp. C02023-C02023
Author(s):  
R. Mendicino ◽  
A. Kok ◽  
O. Koybasi ◽  
M. Povoli ◽  
A. Summanwar ◽  
...  
Keyword(s):  
Neutron Irradiation ◽  
Electrode Geometry ◽  
Before And After

Neutron irradiation effects on gallium nitride-based Schottky diodes

2013 ◽  
Vol 103 (16) ◽  
pp. 162106 ◽  
Author(s):  
Chung-Han Lin ◽  
Evan J. Katz ◽  
Jie Qiu ◽  
Zhichun Zhang ◽  
Umesh K. Mishra ◽  
...  
Keyword(s):  
Gallium Nitride ◽  
Neutron Irradiation ◽  
Schottky Diodes ◽  
Irradiation Effects

Timing resolution of SiPM technologies before and after neutron irradiation

2020 ◽  
Vol 15 (01) ◽  
pp. C01023-C01023
Author(s):  
S. Kumar ◽  
L. Niraula ◽  
D. Arutinov ◽  
A. Dalla Mora ◽  
S. Van Waasen
Keyword(s):  
Neutron Irradiation ◽  
Timing Resolution ◽  
Before And After

High-flux neutron irradiation of boron trioxide analyzed with Raman and FTIR spectroscopy

2020 ◽  
Vol 34 (18) ◽  
pp. 2050160
Author(s):  
Matlab N. Mirzayev
Keyword(s):  
Raman Spectrum ◽  
Ftir Spectroscopy ◽  
Functional Groups ◽  
Neutron Irradiation ◽  
Spectrum Analysis ◽  
Boron Oxide ◽  
Fast Neutrons ◽  
Raman Analysis ◽  
Before And After ◽  
Flux Formula

Boron oxide nanopowder is widely used in the production of special glasses and nuclear technology. This paper reports on the optical properties and investigates the formation of new bonds on the structure of nanoboron oxide. In this work, high purity boron oxide samples were irradiated using a energy upto 1 MeV fast neutrons with fluences in the range of [Formula: see text], [Formula: see text], [Formula: see text], [Formula: see text] and the neutron flux [Formula: see text] at the room-temperature. Optical properts were determined using Raman spectrum analysis and spectroscopy Fourier transform infrared (FTIR) spectroscopy. FTIR and Raman spectrum analysis were used to explain the chemical bonds and functional groups of nanoboron oxide samples before and after neutron irradiation. When the irradation fluence on [Formula: see text] was increased upto [Formula: see text] it resulted in the formation of a new functional groups [Formula: see text]. From the Raman analysis, the [Formula: see text] was observed to start amorphization after neutron irradiation.

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