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Showing 1 to 15 of 15 for “"vacuum vessel"”.
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Tritium Inventory in the Vacuum Vessel and Pumping Ducts of TFTR
Made available in DSpace on 2017-07-06T18:48:26Z (GMT). No. of bitstreams: 3 Haynes_Lisa_A_MS.pdf: 34910127 bytes, checksum: 5733bdf0b7ac47440b17105dd716490f (MD5) Haynes_Lisa_A_MS_ABS.pdf: 689159 bytes, checksum: ba395fcce2756068dd9c40e91cdf319d (MD5) license.txt: 4813 bytes, checksum: …
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NITE–Processed SiC/SiC Ceramic Composites in Liquid Sandwich Vacuum Vessel
… fusion technology. This thesis focuses on the vacuum ves-sels (VVs) surrounding the plasma in an ARC-class fusion tokamak. VVs require significant development to go from their current state of the art in research-scale, non-breakeven fusion devices to the much larger, thinner, and robust VVs …
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Manufacturing Strategies for NITE-processed SiC/SiC Ceramic Composite Components in the Liquid Sandwich Vacuum Vessel for Fusion Reactors
In nuclear fusion tokamaks, vacuum vessels must be able to withstand large disruption forces resulting from potential plasma quenches. The Liquid Sandwich Vacuum Vessel (LSVV) is a novel alternative to conventional thick steel vacuum vessels. In the LSVV design, liquid lead circulates through …
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Floating coil position detection system for the Levitated Dipole Experiment
… electromagnetic ring in the center of a large vacuum chamber. The goals of the experiment call for the ring to be levitated in the center of the vacuum vessel by the magnetic field of another superconducting electromagnet. This act requires a feedback mechanism to control the position of the …
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The effect of ICRF and LHCD waveguide and launcher location on tritium breeding ratio and radiation damage in fusion reactors
… package to analyze the activation of the vacuum vessel components. A simple geometry was designed for MCNP, based on the original ARC model [1]. Seven locations for the waveguides and antenna were chosen: the inner and outer midplane, the inner and outer upper corners, two spaces between …
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Shutdown Dose Rate Modeling for Radiation Requirements Development and Design Trend Analysis in the ARC Fusion Device
… is Vanadium’s lower dose rate than Eurofer as a Vacuum Vessel and Blanket Tank material in all configurations, making it the preferred candidate from a radiation perspective. Second, the model indicates that the choice in Blanket Tank material contributes non-trivially to the maintenance …
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Investigation of Alfvén eigenmodes in Alcator C-Mod using active MHD spectroscopy
… system. Antennas mounted inside the C-Mod vacuum vessel are driven by a high power amplifier in the TAE range of frequencies and excite modes inside the plasma. Magnetic fluctuation diagnostics provide the plasma response to this excitation. The damping rate is then calculated from the …
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Alternative methods of vertical plasma control in the Alcator C-Mod Tokamak
… into account a model of induced currents in the vacuum vessel and coils. The results of the analysis concluded that there were moderate speed advantages to using state feedback on The OH2 coils, but these were outweighed by the robust operation of EFC PD control. No design achieved a decisive …
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Visible spectroscopic imaging on the Alcator C-Mod tokamak
… and two are used for a wide-angle survey of the vacuum vessel. The divertor viewing cameras are used to generate two-dimensional emissivity profiles using tomography. Three physics issues have been addressed using the visible imaging system: 1) Using two-dimensional emissivity profiles of Da, …
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Engineering upgrades to the Motional Stark Effect diagnostic on Alcator C-Mod
… high-precision moving part internal to the vacuum vessel. Fiber optics are used to sequentially illuminate the calibration polarizers via backlight scattering similar to an LCD screen, fully filling the view of each of the ten mse sightlines with polarization angles repeatable to better than …
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Experimental and computational magnetic surface mapping of the HIDRA stellarator
… the physical disposition of the coils and/or vacuum vessel may have been offset by even the slightest of margins. This can lead to additional perturbations of the magnetic field, changing the magnetic topology of the device. The electron gun and fluorescent detector technique was employed to …
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Development of Materials for Extreme Environment Applications by Laser Powder Bed Fusion
… by metal additive technology, fusion reactor vacuum vessels and jet engine turbine blades, and explore the practical usage of laser powder bed fusion to improve production of relevant materials. First, material enhancements are considered in the context of increasing survivability for …
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Development of the “Stix” Code, a Radio Frequency (RF) Wave Solver, to Investigate RF-Sheath Behavior in Realistic Tokamak Geometry
… scenario, the calculated voltages along the vacuum vessel are negligible. This result is discovered to be due to the small magnetic field angles, bn, into the walls as direct consequence of the poloidal cross-section reference frame. Further investigation through the addition of limiter-like …
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Plasma Facing Components conditioning techniques and their correlation with plasma performance in the National Spherical Torus eXperiment Upgrade (NSTX-U)
… with the reduction of impurities in the vacuum vessel. Oxygen related impurities are retained on the surface of the boronized PFC, and the binding process is driven by the presence of D+ plasmas. However, the improvements are only temporal, and according to the results in this document …
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Manifold learning techniques and statistical approaches applied to the disruption prediction in tokamaks
… released on the first wall components and vacuum vessel causing runaway electrons, large mechanical forces and intense thermal loads, which may cause severe damage to the vessel wall and the plasma face components. Present devices are designed to resist the disruptive events; for this …