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 43 for “"Free electron laser"”.
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A Ka-band free-electron laser amplifier
Thesis: M.S., Massachusetts Institute of Technology, Department of Physics, 1991
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Simulation and design methods for free-electron laser systems
… and planning of many experiments since the free-electron laser was invented in the 1970s. This thesis illustrates methods used for these tasks and for the validation and development of further theory. FEL systems and their components are described, briefly discussing how they fit into design …
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Electron Beam Diagnostic at the ELBE Free Electron Laser
… the facility. ELBE is based on a superconducting electron linac. The linac consists of two accelerating modules and uses TESLA type nine-cell niobium cavities, two cavities in each module. The cavities were developed at DESY in the framework of the TESLA linear collider project and the X-ray free …
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Towards a free-electron laser driven by a laser wakefield accelerator
The free-electron laser (FEL) is a powerful source of tuneable coherent radiation that currently demands kilometre-scale beam lines for high-energy vacuum ultraviolet (VUV) and X-ray output. Driving an FEL with a laser wakefield accelerator (LWFA) electron beam would radically reduce the size of …
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Coherent ionization dynamics induced by intense X-ray free-electron laser pulses
… by ultrashort and intense pulses from an (X-ray) free-electron laser are investigated with the objective to find appropriate conditions where coherent dynamics manifests itself in physical observables. The ionization dynamics induced by an X-ray or extreme ultraviolet laser pulse is typically …
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A high average-current electron source for the Jefferson Laboratory free electron laser
… power from the Jefferson Laboratory infra-red free electron laser is primarily limited by the performance of the electron injector. Free electron laser power is directly proportional to the electron beam current and at present the electron injector is limited to 10mA average current. To date …
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The spectral analysis of the spontaneous emission of MIT's 8.8 mm, room temperature, pulsed free electron laser microwiggler
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Physics, 1994.
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Measurements of the temporal and spatial phase variations of a 33 GHz pulsed free electron laser amplifier and application to RF acceleration
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Physics, 1995.
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Parametric amplification of mid-infrared picosecond radiation
… source, by combining the radiation from a free electron laser with a powerful Nd:YAG pump laser. The method allows obtaining an amplified energy of the order of one millijoule, for pulse durations of few picoseconds and a repetition rate of 10 Hz. The radiation is tuneable in the wavelength …
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Interactions of intense optical and extreme-ultraviolet lasers with atoms and solids
… of intense optical and extreme-ultraviolet laser pulses with atoms and solids. The work was divided into two main parts: The first part describes studies on laser-produced plasmas done at the National Centre for Plasma Science and Technology in Dublin City University using an intense optical …
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Modeling of the electric ship
… The first part of this thesis will focus on the free electron laser (FEL). The FEL will require a substantial amount of power during an engagement; even at reduced levels of readiness, the FEL will still need residual amounts of power in order to fire the weapon in a reasonable amount of time. …
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Improved temporal coherence and short pulse generation in free electron lasers
… a Self-Amplified Spontaneous Emission (SASE) Free-Electron Laser (FEL) has poor temporal coherence because the SASE process is a localised collective interaction that occurs on a scale far smaller than the typical length of the electron bunch used within the FEL. In this thesis a new …
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Optische Kontrolle der Lasertätigkeit im Röntgenbereich
X-ray free-electron lasers have revolutionized x-ray science by achieving unprecedented intensities exceeding 10^18 W/cm^2. However, they lack temporal coherence and controllability of their pulses' temporal and spatial properties, which is essential for many applications. We investigate the …
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Timing Diagnostics and Coherent Harmonics from a test-FEL
The test free-electron laser (test-FEL) at MAX-lab in Lund demonstrated for the first time circularly polarized coherent femtosecond pulses at 66 nm wavelength. A 375 MeV electron bunch was seeded by a femtosecond laser at 263 nm and coherent harmonics were extracted in an APPLE-II type elliptical …
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FEL theory in the ION channel wiggler
The ion channel laser (ICL) is an ultra-compact version of the free-electron laser (FEL),with the wiggler replaced by an ion channel. Given its small size and the large wiggler field that can be created within a small volume, it has enormous potential for generating high-frequency coherent …
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An ultra-high resolution pulsed-wire magnet measurement system
The performance of a Free-Electron Laser (FEL) depends in part on the quality of the magnetic field in the undulator. Ideally the magnetic field on the axis of the undulator is transverse to the axis and sinusoidally varying due to the periodic sequence of alternating field dipole magnets. The …
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Structural enzymology of soluble methane monooxygenase protein-protein interactions.
… Using X-rays generated by either an X-ray free electron laser at room temperature or a synchrotron at 100 K, we obtained high resolution structures of the Methylosinus trichosporium OB3b sMMOH:MMOB complex for the first time. Analysis of the data shows in great detail how MMOB modulates the …
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Optical Excitation of Metastable Krypton and Photoassociative Spectroscopy of Ultracold RbAr
… present a unique challenge in the context of laser experiments. Laser physics work with rare gases often relies on excitation within an RF discharge. All-optical excitation is a promising replacement for RF discharges, avoids problems caused by ion production and may eventually allow for …
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Biospectroscopy investigations Into cervical cytology
… optical microscopy in combination with an IR free electron laser (SNOM-IR-FEL), in determining the biophysical properties of abnormal cervical cells. SNOM-IR-FEL is able to distinguish between normal and various grades of cervical abnormalities at designated wavelengths associated with DNA, …
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Noncovalent Interactions Between Alkali Metal Cation And Aza/thia-Crown Macrocycles: Mass Spectrometric Techniques And Theoretical Studies
… were used in conjunction with theoretical electronic structure calculations to characterize the structures, binding interactions, and stability of cation-aza-crown ether interactions. Quantum chemical calculations at several levels of theory were employed to characterize the structures and …
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