Download or read book Development of a Thomson Scattering System and Its Use in a Rotating Magnetic Field Driven Field reversed Configurations Plasma written by Kiyong Lee and published by . This book was released on 2011 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1994 with total page 1028 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Download or read book Development of a Thomson Scattering Diagnostic on a Pulsed Power Machine and Its Use in Studying Laboratory Plasma Jets Focusing on the Effect of Current Polarity written by Jacob Thomas Banasek and published by . This book was released on 2019 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research primarily focused on the development of a collective Thomson scattering system for experiments on a 1~MA 100~ns pulsed power generator at Cornell University (COBRA). This diagnostic is capable of determining, at a minimum, the electron temperature, electron density and the flow velocity in the plasma. It was used in experiments on plasma jets created using a radial Al foil (thin disk of foil) load on COBRA. These jets served as a good load as they were long-lasting and at the center of the experimental chamber. The first set of experiments explored the rotation of the jet when an external magnetic field is applied and found the jet to be rotating at about 20~km/s. During these experiments, it was discovered that the Thomson scatter laser energy (10~J) was sufficient to heat the 20~eV jet plasma by inverse bremsstrahlung. While this did not affect the velocity measurements, it did significantly affect the measured temperature of the plasma. To better study this perturbation, a streak camera was set up to measure the changing temperature during the laser pulse. The plasma was found to be heated from about 20 to 80~eV in the first half of the laser pulse, before cooling down due to the expansion of the plasma. We also started developing a system to record the high-frequency Thomson scattering spectral feature to measure the density of the plasma. This showed some initial promising results and suggested densities of at least $5\times10^$~cm$^{-3}$. Finally, using low enough laser energy to avoid laser heating of the plasma, the effect of current polarity on the plasma jets was studied experimentally. It was found that while jets with a radial outward current flow were denser and wider than jets with a radial inward current, both jets had a similar electron temperature. These experiments were also compared to extended magnetohydrodynamic (XMHD) simulations. While experimental jets had about the same width as those in the simulation, they were found to be slightly colder and significantly less dense than the simulations.

Download or read book Energy Research Abstracts written by and published by . This book was released on 1988 with total page 872 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book Energy Research Abstracts written by and published by . This book was released on 1986 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1976 with total page 920 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration. Technical Information Center and published by . This book was released on 1976 with total page 962 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book A Simple High Performance Thomson Scattering Diagnostic for High Temperature Plasma Research written by and published by . This book was released on 1994 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Thomson scattering diagnostic is used to measure the electron temperature and density of the plasma in the MST reversed-field pinch, a magnetic confinement fusion research device. This diagnostic system is unique for its type in that it combines high performance with simple design and low cost components. In the design of this instrument, careful attention was given to the suppression of stray laser line light with simple and effective beam dumps, viewing dumps, aperatures, and a holographic edge filter. This allows the use of a single grating monochromator for dispersion of the Thomson scattered spectrum onto the microchannel plate detector. Alignment and calibration procedures for the laser beam delivery system, the scattered light collection system, and the spectrometer and detector are described. A sample Thomson scattered spectrum illustrates typical data.