Abstract

Synchrotrons and harmonically upconverted pulsed lasers can provide narrowband and tunable extreme ultraviolet (XUV) radiation in the wavelength range below 100 nm. Laser-based sources bear the advantage of straightforwardly achievable bandwidths below 1 cm^-1, when Q-switched lasers in the nanosecond pulse domain are employed. A second advantage of such instruments is their easy incorporation in multistep excitation experiments where various laser pulses are temporally overlapped, or slightly delayed by rather simple and commercially available nanosecond electronics.

© 1998 IEEE