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 85 for “"soft X-ray"”.
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High-resolution detectors for soft X-ray spectroscopy
Resonant Inelastic X-ray Scattering (RIXS) is a modern soft X-ray spectroscopy technique used to investigate the structure of and excitations in materials. It requires high resolution spectrometers and a brilliant, tunable, X-ray source and therefore is carried out at spectrometers such as SAXES at …
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Alcator C-Mod soft X-ray pulse height analysis system
… The PHA utilizes a Si(Li) detector to measure soft X-rays in the 1-30 keV range with an energy resolution on the order of 100eV. A FASTComtec MCA-3 multichannel analyzer allows integration times of ims while the PHA supports counting rates of up to 80kHz. The thermal electron temperature is …
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The design of whispering gallery mirrors for soft x-ray lasers
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1988.
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Upgrade of the neon soft X-ray spectrometer for Alcator C-Mod
… temperature, and impurity density, a Neon Soft X-ray Spectrometer (NeSoXs) was installed on the Alcator C-Mod tokamak. This spectrometer used a spherically bent mica crystal as the reflective element in order to separate the spectral and spatial information on the receiving CCD. The …
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Transmission diffraction gratings for soft x-ray spectroscopy and spatial period division
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1982.
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Magnetic coupling in (GaMn)As ferromagnetic semiconductors – studied by soft x-ray spectroscopy
Durch die Dotierung von Gallium Arsenid mit Mangan werden lokale magnetische Momente implantiert und gleichzeitig Ladungsträger (Valenzband Löcher) erzeugt, welche eine langreichweitige ferromagnetische Kopplung zwischen den einzelnen Mangan Ionen herstellen können. In dieser Arbeit wurde die …
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Computationally Modeling the Effects of Surface Roughness on Soft X-Ray Multilayer Reflectors
Electromagnetic scattering from a rough two dimensional homogeneous scatterer has been computationally modeled. The scatterer is intended to simulate reflection from a two interface multilayer. The rough scatterer was created from Gaussian random points centered about an ideal interface. The points …
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Soft x-ray near edge spectroscopy of cuprous oxide and silicon-germanium alloys
High resolution soft x-ray absorption near edge structure (XANES) spectra have been obtained for CU20 and for SiGe1-x semiconductor alloys, xas a function of composition x, using the methods of partial electron yield and thin film absorption. The shapes of the near edge features provide a unique …
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Analytical study of steady state plasma ablation from soft X-ray laser target
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Magnetic domain formation in La1-xSrxMnO3 nanowires studied with resonant soft x-ray scattering
… the nanowires. For this purpose, we fabricated arrays of nanowires 30nm tall, 80nm wide from LSMO thin films using e-beam lithography. Magnetization measurements performed on these wires showed an anomalous increase in the magnetization at temperatures far below the Curie point of the bulk …
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Design and application of a soft X-ray detector using GaAs multiple quantum wells
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.
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Tabletop coherent extreme ultraviolet and soft X-ray sources based on high harmonic generation
… harmonics at the extreme ultraviolet (EUV) and soft X-ray range. Such an unprecedented broadband and coherent spectrum thus has many novel applications, one of which is to build tabletop coherent EUV and soft X-ray sources. The development of EUV and soft X-ray lasers is very challenging because …
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Measurements of injected impurity transport in text using multiply filtered soft x-ray detectors
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1990.
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Absolute molecular electronic spectroscopy at UV and soft X-Ray energies by hihg-energy electron impact
… and C is (CH3OH)), spanning the visible to soft X-ray equivalent photon energy regions(5.0-400 eV). Absolute scales have been established using the Thomas-Reiche-Kuhn sum rule. Dipole (e,e+ion) spectroscopy has been employed to study the molecular and dissociative photoionization in the …
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Ultrafast photoinduced phase transitions in complex materials probed by time-resolved resonant soft x-ray diffraction
… here were obtained with time-resolved resonant soft x-ray diffraction at the Femtoslicing source of the Helmholtz-Zentrum Berlin and at the free-electron laser in Stanford (LCLS). In addition the development and setup of a new UHV-diffractometer for these experiments will be reported.
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Ultrafast Transient Absorption and Multi-Wave Mixing Spectroscopies in the Extreme Ultraviolet and Soft X-RAY Regimes
… a delegate vacuum setup, special EUV and x-ray optics, photon budget and dispersion management.
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Resonant soft X-ray studies of charge orders in high-temperature cuprates with energy-resolving transition edge sensors
… the mechanism of charge orders. Resonant Soft (elastic) X-ray Scattering (RSXS), one of the modern technology for structural analysis, takes the benefits of both X-ray Absorption Spectroscopy (XAS) and x-ray scattering, in other words, it can detect electronic structure of target element …
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Micrometeroid, orbital debris, and shielding analysis for the Soft X-ray Camera (SXC) of the High Energy Transient Explorer (HETE-2) spacecraft
… determine the origin and nature of cosmic gamma-ray bursts (GRBs). The Soft X-ray Camera (SXC) is the new science instrument on board the HETE-2 spacecraft and uses a pair of Charge Coupled Devices (CCDs) to detect incoming X-ray in the 0.5-14 keV energy range. Once in Earth orbit, HETE-2 will …
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