Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 38 for “"Interaction region"”.
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The vacuum chamber in the interaction region of particle colliders : a historical study and developments implemented in the LHCb experiment at CERN
El colisionador de protenes actualmente en construcción en el CERN llamado LHC (Large Hadron Collider) se convertirá en el más potente acelerador jamas construido con una energía por protón de 7 TeV. Se prevé que esta en operación en 2007. Constará de 4 grandes experimentos uno de los cuales, LHCb, …
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Simultaneous multi-angle measurements of plasma turblence at HAARP
… study strong Langmuir turbulence (SLT) in the interaction region of overdense ionospheric plasma. Diagnostics included the Modular UHF Ionospheric Radar (MUIR) sited at HAARP, the Super DARN-Kodiak HF radar, and HF receivers to record stimulated electromagnetic emissions (SEE). Short pulse, low …
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Studies of aspect angle dependence of plasma turbulence at HAARP
… study strong Langmuir turbulence (SLT) in the interaction region of overdense ionospheric plasma. Diagnostics included the Modular UHF Ionospheric Radar (MUIR) sited at HAARP, the Super DARN-Kodiak HF radar, and HF receivers to record stimulated electromagnetic emissions (SEE). Short pulse, low …
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Ablation of Steel by Microsecond Pulse Trains
… the pulses is properly defined. The light-matter interaction moves from a regime of surface morphology changes to melt and vapour ejection. Inline coherent imaging (ICI), a broadband, spatially-coherent imaging technique, is used to monitor the ablation process. The pulse parameter space is …
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The numerical and experimental investigation of gyro-multiplier configurations
… of 37.5 GHz and 75 GHz, respectively. The interaction region is of mean radius, 8 mm, with a corrugation depth, 0.7 mm, and is 39 mm in length. The idealised electron beam utilised is of voltage, 60 kV, with current between 5 A and 10 A, confined in a magnetic field of ~0.7 T. Separation of …
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The numerical and experimental investigation of gyro-multiplier configurations
… of 37.5 GHz and 75 GHz, respectively. The interaction region is of mean radius, 8 mm, with a corrugation depth, 0.7 mm, and is 39 mm in length. The idealised electron beam utilised is of voltage, 60 kV, with current between 5 A and 10 A, confined in a magnetic field of ~0.7 T. Separation of …
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Modeling of a compact terahertz source based on the two-stream instability.
… 2-D particle-in-cell (PIC) simulations of the interaction region of the two-beam source. The interaction region consists of a beam pipe of radius r_a and two electron beams of radius r_b co-propagating and interacting inside the pipe. The simulations involve the interaction of unmodulated (no …
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Crabbing System for an Electron-Ion Collider
… the integration of the crabbing systems to the interaction region. Following this, we propose the concept of twin crabs to allow machines with variable beam transverse coupling in the interaction region to have full crabbing in only the desired plane. Finally, we present recommendations to …
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On supplementing shock tube drivers by magnetohydrodynamic interactions
A magnetohydrodynamic interaction is applied to the driver gas behind a shock propagating along a constant area tube in order to accelerate the shock. It is found that in the expansion fan, which usually matches the driver gas conditions to the shock heated gas conditions, the expanded part is more …
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On supplementing shock tube drivers by magnetohydrodynamic interactions
A magnetohydrodynamic interaction is applied to the driver gas behind a shock propagating along a constant area tube in order to accelerate the shock. It is found that in the expansion fan, which usually matches the driver gas conditions to the shock heated gas conditions, the expanded part is more …
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Penning ionization studies using a crossed-beam technique
… Extraction of the product ions from the interaction region and subsequent acceleration and steering of these ions through the spectrometer are analyzed.
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An experimental investigation of the two-stream, supersonic, near wake flowfield behind a finite-thickness base
The interaction region generated by separation of two supersonic streams past a finite-thickness base occurs in high-speed flight and characterizes the aft-end flowfield of powered missiles in supersonic flight. In order to examine fundamental mechanisms and interactions ongoing in this near-wake …
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Temperature insensitive fiber optic interferometer and applications
… by cleaving the coupler after the minimum taper region and polishing, perpendicular to the endface, to a point just short of the interaction region. This allows one of the two fiber cores, which are within micrometers of each other with their claddings fused together, to be coated at its endface …
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Enhanced plasma wave spectral asymmetries
… waves via a parametric wave-plasma coupling interaction. Incoherent backscatter radar is used to obtain detailed power spectra of these enhanced plasma waves. Power and frequency asymmetries are detected between spectra of enhanced plasma waves propagating parallel and antiparallel to the …
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Performance Improvement through Velocity Triangle Optimization-Driven Redesign for Mitigating the Horseshoe Vortex in Axial Turbines
… streamlines at the end wall/primary flow interaction region of an axial turbine stage induce three-dimensional vortical flow structures, such as the leading edge horseshoe vortex, resulting in significant aerodynamic performance deterioration. Reducing the effect of such flow instabilities …
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Measuring atomic properties with an atom interferometer
… into two paths, one of which travels through an interaction region. The paths are recombined, and the interference pattern exhibits a phase shift depending on the strength of the interaction. In the first experiment, the interaction involves a gas. De Broglie waves traveling through the gas …
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Meshless hydrodynamic simulations of young supernova remnants
… interferometers have spatially resolved the interaction region and directly measured the expansion rates of the shocked gas; many show evidence of the interaction of supernova ejecta with the dense slow winds characteristic of the red supergiant progenitors. Understanding the dynamics and …
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PROOF-OF-PRINCIPLE TEST FOR AN EXPERIMENT FOR SHORT-LIVED PARTICLE DIPOLE MOMENTS AT LHC
… of baryons and the dynamics of the strong interaction. Although the magnetic moments of light baryons are precisely known, those of charm baryons remain unmeasured due to their extremely short lifetimes. A direct measurement at the 10% level would enable discrimination among competing …
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Modeling Ganymede's Interaction with the Jovian Magnetosphere: Ionospheric Outflow and the Juno PJ34 Flyby
… provide a three-dimensional model of Ganymede’s interaction with the Jovian magnetosphere and the moon’s ionospheric outflow. We also provide context for plasma and magnetic field observations from Juno's PJ34 flyby of Ganymede on 07 June 2021. Using five model configurations that successively …
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Numerical simulation of wave-plasma interactions in the ionosphere
… excited Z-mode waves to reflect back towards the interaction region was found to cause enhancement of the electric field and a substantial increase in electron temperature. Simulations of O-mode and X-mode polarised waves demonstrated that both are capable of exciting geomagnetic field-aligned …
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