Universität Rostock | Published September 24, 2016 - Deadline October 26, 2016
The laser system is to reach on the central wavelength of 800 nm, a high photon density in order to achieve on the one hand in the largest possible volume of the analyte gas sufficient to Starkfeldionisation intensity and on the other hand to allow the efficient generation intensive as possible light of higher frequencies in the UV range for Einzelphotonenionisierung. For this purpose, a pulse energy of at least 6 mJ at 1kHz repetition is required. To limit molecular fragmentation, the pulse length must not exceed 40 fs. For experiments for rapid, resonance-enhanced multiphoton ionization using tunable wavelengths, the system should be equipped with a matching optical parametric amplifier (OPA) and beam splitters. This should be able to be pumped with about half of the total available pulse energy, whereby the other half is intensive excitation pulses available. The achievable frequency range to extend to below 240 nm wavelength. A key requirement is the highest possible stability and reliability of the overall system, since only by quantitative and systematic measurements are possible.