Time-resolved imaging and spatially-resolved spectroscopy of electrical discharge machining plasma

Time-resolved two-dimensional plasma spectroscopy using coherence-imaging techniques

We describe methods for time-resolved imaging of the complex coherence of a spectral scene at one or more optical delays using electro-optically modulated polarization interferometers. By encoding the coherence information at harmonics of the electro-optic modulation frequency, it can be possible to obtain unambiguous spatio-temporal information about important physical parameters that govern t...

Rapid Imaging of Microstructure using Spatially Resolved Acoustic Spectroscopy

Microstructure can have profound effects on the bulk mechanical properties of a material, such as its strength and susceptibility to failure under stress. Several well known methods for imaging microstructure exist, including essentially destructive techniques such as etching and electron back-scattered diffraction, and contact techniques such as the scanning acoustic microscope. SRAS – spatial...

Time Resolved Spectroscopy of a Nanosecond Pulsed Discharge in Water

A time revolved spectroscopic study of the emission phases occurring throughout a nanosecond pulsed discharge in water is presented. Discharged are ignited in deionized water via a submerged pin-t-plane electrode configuration by application of 24kV pulses with a rise time of 4ns and a duration of 10ns. Optical emission spectroscopy of the plasma radiation is performed, revealing a very complex...

Spatially resolved and time-resolved imaging of transport of indirect excitons in high magnetic fields

C. J. Dorow,1 M. W. Hasling,1 E. V. Calman,1 L. V. Butov,1 J. Wilkes,2 K. L. Campman,3 and A. C. Gossard3 1Department of Physics, University of California at San Diego, La Jolla, California 92093-0319, USA 2School of Physics and Astronomy, Cardiff University, Cardiff, CF24 3AA Wales, United Kingdom 3Materials Department, University of California at Santa Barbara, Santa Barbara, California 93106...

Ultrafast Time-Resolved Spectroscopy