15 MeV proton irradiation effects on Bi-based high temperature superconductors
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N. Alinejad
Abstract
Nowadays, superconducting magnetic coils are used in some tokamaks such as EAST, KSTAR, JT-60, and T-15 to generate strong magnetic fields and also in ITER magnetic fields of about 13 tesla will be produced with the help of superconductors. The tokamak superconductors are exposed to the variety of radiations (neutron, ions beam, and gamma) from plasma nuclear reactions which will affect some of the superconductor properties. Therefore, study of the irradiation effects on the superconductor structure and properties are very crucial from technological and scientific point of view. One of the superconductor irradiation effects to be investigated under different conditions of energy and dosage is the potential resistance of the material used in tokamak reactor magnetic coils against activation by radiation. In this work, pellets of high Tc Bi-based superconductors have been prepared and after measurement of parameters, a sample of pellet has been irradiated with 15 MeV protons using Karaj cyclotron facility. The sample's parameters have been measured again after irradiation treatment. X-ray diffraction patterns and SEM images of the sample before and after irradiation treatment have been studied.
Kurzfassung
Heutzutage werden in Tokamaks wie EAST, KSTAR, JT-60, and T-15 supraleitende Magnetspulen zur Erzeugung starker Magnetfelder verwendet und auch im ITER werden mit Hilfe von Supraleitern Magnetfelder von etwa 13 Tesla erzeugt. Die Tokamak Supraleiter sind verschiedenen Strahlungen (Neutronen, Ionen und Gamma) durch Kernreaktionen im Plasma ausgesetzt, die einige der Eigenschaften der Supraleiter beeinflussen. Deshalb sind Untersuchungen der Strahleneffekte auf Supraleiter-Strukturen und–Eigenschaften aus technologischer und wissenschaftlicher Sicht von entscheidender Bedeutung. Einer der unter verschiedenen Bedingungen zu untersuchenden Supraleiter-Strahleneffekte ist der potentielle Widerstand der im Tokamak verwendeten Materialien gegenüber Aktivierung durch Strahlung. In diesem Beitrag wurden Pellets von Hochtemperatur-Supraleitern auf Wismut-Basis vorgebereitet. Nach Messung der Parameter wurde eine Pelletsprobe mit 15 MeV Protonen des Karaj Zyklotrons bestrahlt. Die Parameter der Probe wurden nach der Bestrahlung wieder gemessen. Röntgen-Diffraktionsmuster und REM Bilder der Probe vor und nach der Bestrahlung wurden untersucht.
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© 2015, Carl Hanser Verlag, München
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Articles in the same Issue
- Contents/Inhalt
- Contents
- Summaries/Kurzfassungen
- Summaries
- Technical Contributions/Fachbeiträge
- Theoretical study of steam condensation induced water hammer phenomena in horizontal pipelines
- Estimation of experimental uncertainty for physical measurements based on the start-up data of the latest VVER-1000 units
- Analysis of SBO ATWS for Maanshan PWR
- Subchannel analysis of Al2O3 nanofluid as a coolant in VMHWR
- The neutronic calculations for some fluids, libraries and structural materials in a hybrid reactor system
- Design and implementation progress of multi-purpose simulator for nuclear research reactor using LabVIEW
- International assessment of application of the Code of Conduct on the Safety of Research Reactors
- 15 MeV proton irradiation effects on Bi-based high temperature superconductors
- Estimation of radiation damage of iron by a reactor gamma spectrum
- Measuring U concentration in solution product of UF6 hydrolysis using a gamma ray densitometer
- Sensitivity analysis of parameters important to nuclear criticality safety of Castor X/28F spent nuclear fuel cask
- Application of UN method to neutron transport equation in slab geometry using HG phase function
- Preparation of human resources for future nuclear energy using FBNR as the instrument of learning
- Technical Note
- Interface network groups
