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 28 for “"Gas-filled"”.
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High-performance compact gas filled spark switches
Gas filled spark switches are used extensively in pulsed power systems for their high rate of dV/dt, dI/dt, fast closing times with low jitter, and their high voltage and current capability. Recently there has been a renewed interest in designing spark switches that can operate with environmentally …
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Radiant heat exchange in gas-filled slabs and cylinders
Thesis (Sc. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1959.
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Characteristics of gas filled glow lamps for use in photometry
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Physics, 1941.
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Time-Lapse Depletion Modeling Sensitivity Study: Gas-Filled Gulf of Mexico Reservoir
Time-lapse seismic allows oil/gas reservoir monitoring during production, highlighting compaction and water movement. Time-lapse modeling, using a stress-dependent rock physics model, helps determine the need and frequency of expensive repeat seismic acquisition. We simulate a Gulf of Mexico gas …
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Detecting, locating and sizing leaks in gas-filled pipes using acoustical measurements
A single leak in a duct can be detected, located and sized by measuring the input impedance of the duct and then analytically solving an inverse problem. However, previously applied analytical methods break down when it comes to predicting smaller hole sizes. Results are presented which show that, …
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Simulation, testing and design of a fully adhesive bonded flat plate solar collector for highly automated production
… drawn on the pressure change in the cavity of gas-filled collectors. Unlike stated in the literature, it was found that the thermal elongation of an all-round supported absorber has a considerable effect on the overall collector performance. Based on these conclusions, an optimised sheet-pipe …
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Development and Evaluation of Paclitaxel-Loaded Liposomal Formulations for Targeted Drug Delivery to Breast Cancer
… in the formulation. Feasibility of developing gas-filled liposomes for ultrasound mediated drug delivery was evaluated using freeze drying gas entrapment method for the preparation. The <em>in vitro</em> measurements of echogenicity showed that these paclitaxel-loaded tumor vasculature targeted …
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Theoretical and experimental studies of optically pumped molecular gas lasers
Optically pumped molecular gas lasers based on vibrational-rotational transitions in the infrared spectral region were studied experimentally and theoretically. A model was developed to predict the performance of such lasers and explore their potentials for energy and power scaling. This rate …
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Experimental Studies of Magnetic Field Generation and Saturation Mechanisms in Laser-Driven Plasmas
… based on laser-driven implosions of DT³He gas-filled capsules has been implemented at the OMEGA laser. This platform, an extension of the original D³He backlighter platform, generates 9.5 MeV deuterons from the T³He reaction in addition to 14.7 and 3.0 MeV protons from the deuterium and …
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Development of an Electromagnetic Sensor for in Pipeline Inspection and Asset Management for the Water Industry
… the sensor would potentially benefit the gas industry by modifying the frequency of operation to match gas filled cylindrical metal structures.
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High-Precision Half-Life Measurement of Oxygen-14
… The half-life of 14O was deduced using a 4π gas-filled proportional counter and fast tape transport system. The lightest superallowed emitters like 14O is important to probe for the non-zero scalar contributions to the nuclearβdecay. This analysis has led to a new half-life value T1/2(14O) …
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Using time-resolved nuclear diagnostics to probe kinetic/multi-ion physics and shock dynamics on OMEGA and the NIF
… the shock and compression timings in D 3 He-gas-filled implosions on the NIF. In combination with other nuclear and X-ray diagnostics, magPTOF is used to assess areal density, areal density asymmetry, implosion velocity, and mix.
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Femtosecond Pulse Compression via Self-Phase Modulation in 1-Decanol
… interaction of intense pulses focused into gas-filled hollow-core fibres. More recently, multiple crystal plates have been used to broaden the spectrum while using a self-focusing relay to maintain the beam quality. In this thesis, I research substituting solids and gases with liquid …
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Laser-Produced Plasmas for Particle Acceleration
… pulse amplification. The laser is focused in a gas, which instantly ionises. In the created plasma, the propagating laser pulse creates a wave, which can accelerate injected electrons. Under the right experimental conditions, the injection mechanism is automatic, and is called self-injection. …
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Direct Observation of Laser Filamentation in High-Order Harmonic Generation
… as it generates high-order harmonics in a long gas cell, filled with 80 torr of helium. A thin foil separates the gas-filled region of the cell from a subsequent evacuated region. The exit plane of the gas cell can be scanned along the laser axis so that the evolution of the laser throughout the …
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Geophysical imaging methods for analysis of the Krafla Geothermal Field, NE Iceland
… We have interpreted a high density intrusion, a gas-filled fracture zone, and a possible partial melt region based on the P-wave, S-wave, and Vp/Vs ratio anomalies in the velocity model. Synthetic modeling of the relationship between the resistivity and velocity models demonstrated the …
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Studying Particle and Energy Transport using Nuclear and X-ray Diagnostics for Discovery Science and Inertial Confinement Fusion
… one-dimensional, shock-driven implosions of D³He gas-filled thin-glass capsules to reach conditions relevant to ICF. In the first set of experiments, low-velocity ion stopping was measured and used to constrain the ion-electron energy exchange cross section at plasma conditions similar to the hot …
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Modelling of capillary high harmonic generation
… the propagation of the driving laser pulse in a gas-filled capillary has a significant effect on generation. To improve the understanding of these processes, this thesis presents a spatio-temporal phasematching model for capillary HHG, and a modal-based model of laser propagation in an ionising …
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