Facility for femtosecond electron/ion imaging spectroscopy

Femtosecond time-resolved molecular fragmentation and ionization dynamics can be studied using an electron/ion velocity map imaging facility in combination with femtosecond pump-probe spectroscopy.

A dedicated molecular beam apparatus, equiped with a homebuilt short pulse (20-30 micro) high repetition rate (DC-1 kHz) pulsed valve, in combination with a state-of-the-art velocity map imaging detector is available to measure the angular and energy distribution of electrons or ions in femtosecond time-resolved experiments. The imaging detector employs a small pore (5 micron) Chevron Micro-Channel-Plate / fast Phosphor / CCD camera detection system.

A 1 kHz regen-amplified TiSapphire based femtosecond laser system with 2 non-collinear-opto-parametric-amplifiers (NOPA) are available to generate two independently tunable femtosecond laser pulses of 25-30 fs duration. Harmonics of both 800 nm and NOPA pulses are available. Autocorrelators and spectrum analyzers are available for pulse characterization.

This experimental facility is available for high-repetition rate femtosecond pump-probe imaging of electrons or ions in ultrafast molecular dynamics.

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  Contact Person at LCVU: Maurice Janssen, email: mhmj@chem.vu.nl