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 5 of 5 for “"supersonic cooling"”.
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Assessment of the Thermal Advantages of Biased Supersonic Cooling
<p>The following work investigates an alternative supersonic film cooling method for hydrogen-fueled, gas-generator cycle rocket engines. The research is intended to serve as an initial proof-of-concept for a biased supersonic film cooling method envisioned for nozzle extension thermal management. …
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Supersonic cooling of short-lived molecular states in a pulsed microcavity plasma jet
… pressure and rotationally cooled by supersonic expansion. Spatial-temporal spectrograms of d^3Σ+u→(b^3)π_g (v', v"") = (0, 0) emission are obtained, which contain the information about the dynamic cooling process during the molecular beam expansion. Analysis shows the spatial-temporal …
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High-resolution infrared spectroscopy in pursuit of C60 and other astrochemical targets
… reach the ground state in spite of inefficient supersonic cooling. The first generation source has been constructed and tested, with the results informing the design of a second-generation source that has been constructed and is currently being evaluated. In addition to the development of an …
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Design, construction, and characterization of an ultra-sensitive, high-precision fast ion-beam spectrometer for the study of molecular ions
… performing mid-IR spectroscopy, and implementing supersonic cooling. The spectra obtained in the mid-IR will be valuable for applied astronomical and fundamental spectroscopic research. Direct infrared spectroscopy of an ion beam was pioneered by the Saykally group in 1989-1990, but has not been …
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Pulsed plasma microjets: a new tool for the investigation of plasma kinetics and molecular spectroscopy
… is suitable both for generating and quickly cooling short-lived molecules, and also for studying the kinetics and dynamics that take place at the rotational level during the expansion process. By integrating a microplasma device with a supersonic nozzle, temperatures as low as 50 K were …