Nominated as an outstanding PhD thesis by the Max Planck Institute of Quantum Optics, Germany Achieves an order of magnitude improvement in the average power of ultrashort pulses Offers direct benefit efficient operation of hard X-ray sources Leads to compact alternatives to large-scale synchrotron facilities

Inhalt
Introduction.- Theoretical Background.- Design of High-Power Enhancement Cavities.- Megawatt-Level Average Power Enhancement Cavities for Ultrashort Pulses.- High-Harmonic Generation at 250 MHz Repetition Rate.- Summary & Outlook.