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Showing 1 to 10 of 10 for “"Plasma Facing Materials"”.
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External proton beam analysis of plasma facing materials for magnetic confinement fusion applications
… to perform in-air ion beam analysis on plasma facing divertor tiles from the Alcator C-Mod tokamak. A Particle Induced Gamma Emission (PIGE) technique was developed for boron depth profiling. In addition, Particle Induced X-ray Emission (PIXE) was implemented and used for a comprehensive …
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Simulated Material Erosion from Plasma Facing Components in Tokomak Reactors
… in the future large tokamak ITER. Electrothermal plasma sources operating in the confined controlled arc discharge regime produce heat fluxes in the range expected for hard disruptions in future large tokamaks. The radiative heat flux produced inside of the capillary discharge channel is from the …
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Heat transfer analysis of thermoelectric driven swirling flow
… heat from the divertor region. The solid plasma facing materials (PFM) suffer from the sputtering and thermal stress. An alternative way is to utilize liquid metal especially the liquid lithium as the divertor material. An experiment on CDX-U found that a shallow pool of liquid lithium …
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Study of temperature dependence of hydrogen retention in lithium coatings on stainless steel with the Materials Analysis Particle Probe (MAPP)
Plasma materials interactions (PMI) in tokamak machines play a crucial role in the overall plasma performance. For this reason PMI research has gained great interest during the last couple of decades. Proper conditioning of Plasma Facing Components (PFCs) has shown to have dramatic effects in …
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F-TRIDYN: A Monte-Carlo, BCA code for modeling ion-surface interactions with rough materials and coupling plasma and material codes
… and additional output modes for coupling to plasma edge and material codes. Surface roughness plays an important role in ion irradiation processes such as sputtering; roughness can significantly increase the angle of maximum sputtering and strongly affect the sputtering yield. The complete …
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Experimental tests of parallel impurity transport theory in Tokamak plasmas
In realistic reactor scenarios, high temIperature plasmas will be composed of not only the fusion reactants and products, but also inpurities introduced purposefully or uninitentionally from plasma facing materials. In tokamaks it is often assumed, sometimes erroneously, that surfaces of constant …
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Intermediate energy proton irradiation: An experimental and analytical foundation for bulk radiation damage testing
… power plants will require thermal and structural materials to perform under new, extreme conditions. Among mechanical, thermal, and corrosion or plasma exposure challenges, materials near the core of fusion and fission power plants will need to survive heavy exposure to high energy neutrons, …
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Simulazioni multiscala dell'invecchiamento dei materiali esposti al plasma in ambienti di fusione nucleare
I Plasma Facing Materials (PFM) sono materiali progettati per stare a diretto contatto con il plasma. L'evoluzione temporale delle loro caratteristiche fisiche è di profondo interesse per diversi ambiti scientifici, in particolare per quello della fusione nucleare con lo scopo di controllarne i …
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Deciphering the role of dispersoids in dispersion-strengthened tungsten alloys on the mechanical properties and irradiation- driven response under nuclear fusion reactor-relevant conditions
Tungsten is the material of choice for plasma-facing components in future plasma- burning fusion reactors because of its high melting point, high sputter threshold, and low hydrogenic species retention. However, tungsten is an intrinsically brittle material, displaying no room temperature ductility …
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Pedestal structure and stability in high-performance plasmas on Alcator C-Mod
… in density, temperature, and pressure near the plasma edge. The pedestal height is strongly correlated with overall fusion performance, as a substantial pedestal supports the elevated core pressure necessary for the desired fusion reaction rate and power density. However, stationary operation …