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Showing 1 to 20 of 211 for “"Nanosecond"”.
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Nanosecond pulse discharges in electronegative gases
… spark gap subjected to highly overvolted nanosecond pulses. The electrode separation is 1 cm. U.V. radiation is applied prior to the arrival of the pulse to the gap. In C2Fg-Ar mixtures the pressure ranges from 500 Torr to 960 Torr and the overvoltage ranges from 50% to 300%. After the i n …
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Ignition by Nanosecond Repetitively Pulsed Discharges
Previous works have shown that nanosecond pulsed plasmas can have strong benefits on ignition, including a reduction of ignition delay times, a decrease of minimum ignition energies, or an extension of lean ignition limits. These effects are highly dependent on experimental conditions such as …
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Correlation Detection of Sub-Nanosecond Optical Pulses
Made available in DSpace on 2014-12-08T22:24:49Z (GMT). No. of bitstreams: 1 7021076.pdf: 5450149 bytes, checksum: 6d558573938e7deba6ad92ced98a33c6 (MD5) Previous issue date: 1970
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Electrical Diagnostics for Nanosecond Pulsed Discharge Reactors
… perform and interpret electrical measurements in nanosecond pulsed discharge reactors. The mathematical framework is implemented in a numerical tool called VI-View, which is made available to the community to aid with the interpretation of electrical measurements and help explain discrepancies …
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Nanosecond Pulsed Plasmas in Dynamic Combustion Environments
… non-equilibrium and are often produced by the nanosecond repetitively pulsed discharge (NRPD) strategy. The development of these discharges is highly dependent both on applied voltage and also on the gas environment (composition, temperature, flow field, etc.). As the plasma affects the …
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Multi-scale modeling of nanosecond plasma assisted combustion
… physical and chemical effects of nonequilibrium, nanosecond plasma discharges on reacting flows. The model is capable of resolving electric field transients and electron impact dynamics in sub-ns timescales, as well as calculating the cumulative effects of multiple discharge pulses over ms …
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Polymers for KrF 248 nm Nanosecond Laser Micromachining
… to the krypton fluoride (KrF) 248 nm nanosecond laser micromachining. Chapter 2 covers preliminary research into the laser micromachining of eleven different kinds of commercial plastic films with different chemical structures and thermal properties. Chapters 3 and 4 discuss the …
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Thin Film Thermal Detectors With Nanosecond Response Time
Made available in DSpace on 2014-12-10T19:06:46Z (GMT). No. of bitstreams: 1 7206901.pdf: 4662234 bytes, checksum: 88096bb70bde8e7aca988b49c8d58657 (MD5) Previous issue date: 1971
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Subsurface modification in Si induced by nanosecond laser irradiation
… in Si wafers due to melting induced by nanosecond pulsed laser irradiation. The wafer dicing technique uses rows of closely spaced modifications that can preferentially guide crack propagation over the natural cleavage planes when the sample is cleaved. The modifications themselves are …
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Subsurface modification in Si induced by nanosecond laser irradiation
… in Si wafers due to melting induced by nanosecond pulsed laser irradiation. The wafer dicing technique uses rows of closely spaced modifications that can preferentially guide crack propagation over the natural cleavage planes when the sample is cleaved. The modifications themselves are …
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Femtosecond through nanosecond investigations of liquid state photochemical reactions
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1994.
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Nanosecond Pulsed Electric Field Effects on Cell Cycle and Apoptosis
… that targets intracellular structures entitled nanosecond pulsed electric fields (nsPEF). NsPEF are high intensity power, low energy, very short pulses (nanosecond) that can provide a new biological tool for modulating intracellular structures and functions. In several cell types nsPEFs have …
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Diverse Effects of Nanosecond Pulsed Electric Fields on Mammalian Cells
… functions. Based on molecular modeling of nanosecond duration pulsed electric fields (nsPEFs) the short duration of the pulse does not contribute to significant electroporation in the conventional sense. Rather a large number of nano-pores are formed, or supra-electroporation, that can …
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Pulsed nanosecond dielectric barrier discharge in nitrogen at atmospheric pressure
Small power devices are of strong interest as many electronics are made more compact. Those portable power sources are widely used in aerospace applications such as small UAVs and satellite thrusters. Typically, these portable devices rely on batteries, but small power generators based on …
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Sub-nanosecond time of flight on commercial Wi-Fi cards
… that measure the time-of-flight to sub-nanosecond accuracy on commercial Wi-Fi cards. We implement these algorithms and demonstrate a system that achieves accurate device-to-device localization, i.e. enables a pair of Wi-Fi devices to locate each other without any support from the …
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A New Nanosecond Gated Optical Detection System: Application to Spectrochemical Analysis
Made available in DSpace on 2014-12-13T20:09:36Z (GMT). No. of bitstreams: 1 7606751.pdf: 3265029 bytes, checksum: 81653f199b1a9cb21e5673b87d274f78 (MD5) Previous issue date: 1975
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Percolation and nanosecond fluctuators in V2O3 films within the metal-insulator transition
Vanadium sesquioxide (V2O3) exhibits a first-order metal-insulator transition (MIT) at 160 K between a low temperature, monoclinic, antiferromagnetic Mott insulator and a high temperature, rhombohedral, paramagnetic, metallic phase. In thin films, due to strain, the transition takes place over a …
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Nanosecond Pulsed Laser Processing of Metals and Welding of Metal-Glass Nanocomposites
In this thesis, nanosecond pulsed lasers are used as the tools to generate microstructures on metal and glass. The applications of these structures are described too. The production of micro structures is demonstrated using diode-pumped solid state (DPSS) Nd:YVO4 lasers operating at wavelengths of …
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