Subnanosecond Thomson scattering setup for space and time resolved measurements with reduced background signal

Calibration of a Thomson scattering diagnostic for fluctuation measurements.

Detailed calibrations of the Madison Symmetric Torus polychromator Thomson scattering system have been made suitable for electron temperature fluctuation measurements. All calibrations have taken place focusing on accuracy, ease of use and repeatability, and in situ measurements wherever possible. Novel calibration processes have been made possible with an insertable integrating sphere (ISIS), ...

Stimulated Raman scattering in micrometer-sized droplets: time-resolved measurements.

Time-resolved measurements of elastic scattering and stimulated Raman scattering (SRS) in micrometer-sized water and carbon tetrachloride droplets irradiated with a pulsed, frequency-doubled Nd:YAG laser (pulse width 8 nsec, lambda = 532 nm, peak intensity ~1 GW cm(-2)) are reported. Elastic scattering of light is instantaneous within our measurement error, estimated to be <+/-3 nsec. On the ot...

Subnanosecond, time-resolved, broadband infrared spectroscopy using synchrotron radiation

A facility for subnanosecond time-resolved ~pump-probe! infrared spectroscopy has been developed at the National Synchrotron Light Source of Brookhaven National Laboratory. A mode-locked Ti:sapphire laser produces 2 ps duration, tunable near-infrared pump pulses synchronized to probe pulses from a synchrotron storage ring. The facility is unique on account of the broadband infrared from the syn...

Simple setup for nanosecond time-resolved spectroscopic measurements by a digital storage oscilloscope.

An application of a digital storage oscilloscope for nanosecond time-resolved spectroscopic measurements is demonstrated in the range from the single-photon region to the multi-photon region. In comparison to the time-correlated single photon counting (TCSPC) method, the measurement setup can be greatly simplified by averaging the signals measured by the oscilloscope. Moreover, the multi-photon...

Subpicosecond Thomson scattering measurements of optically ionized helium plasmas.