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The presented technology will most likely overcome these limitations. The technology uses high order harmonic generation (HHG) driven by short wavelength driver pulses (400-750 nm) to achieve EUV radiation of energies up to 100 eV. Using a specific drive wavelength and specific interaction parameters one can generate a desired EUV wavelength. The laser cavity in which the generation occurs enables the multiple interaction of the laser pulse with the gas jet. The overall efficiency of the system is determined by the number of interactions between the laser pulse and gas, so the cavity can be chosen to ensure large boosts in efficiency.