Leseprobe
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Enhancement Cavities for the Generation of Extreme Ultraviolet and Hard X-Ray Radiation
Henning Carstens
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Springer International Publishing 
Naturwissenschaften, Medizin, Informatik, Technik / Elektrizität, Magnetismus, Optik
Beschreibung
This thesis discusses the power scaling of ultrashort pulses in enhancement cavities, utilized in particular for frequency conversion processes, such as Thomson scattering and high-harmonic generation. Using custom optics for ultrashort-pulse enhancement cavities, it demonstrates for the first time that at the envisaged power levels, the mitigation of thermal effects becomes indispensable even in cavities comprising solely reflective optics. It also studies cavities with large beams, albeit with low misalignment sensitivity, as a way to circumvent intensity-induced mirror damage. Average powers of several hundred kilowatts are demonstrated, which benefit hard x-ray sources based on Thomson scattering. Furthermore, pulses as short as 30 fs were obtained at more than 10 kW of average power and employed for high-harmonic generation with photon energies exceeding 100 eV at 250 MHz repetition rate, paving the way for frequency comb spectroscopy in this spectral region.
Kundenbewertungen
Thermal Mirror Deformation, Cavity-enhanced Thomson Scattering, High-repetition Rate High-harmonic Generation, High-power Enhancement Cavity, XUV Frequency Comb