Fast Imaging

Fast Imaging

Diagnostics for evolution of short processes on time-scale of below ns (i.e. ionization wave propagation)

Diagnostics for bulk plasma fluctuations at rate of 500 frames per second

Spectral imaging 2-D distribution of specific species

Imaging diagnostics will be utilized to monitor the dynamic behavior of the plasma, including entire system and selected species. For the latter, fitting the camera with a narrow bandpass optical filter allows monitoring the spatial and temporal evolution of certain atomic molecular and atomic species (see spectral imaging example below).

Spectral imaging of different species in carbon plasma discharge

PPPL lab is equipped with nanosecond ICCD cameras, capable working with minimal exposure of 2-3 ns (Andor iStar and PiMax 3) and with a camera (4Picos) having a minimal exposure of 200 ps. These cameras are suitable for capturing the evolution of short and low-light processes in plasmas.

Spatial and temporal evolution of ion emission during laser ablation of solid BN target

Times on each image are given with respect to laser shot (captured with PiMax3)

PPPL lab is also equipped with a fast-framing Phantom V7.3 camera, capable of operating at 500k frames per second rate, with minimal exposure of 1 μs. The fast framing camera is suitable for tracking bulk movement of plasma, oscillations and striations formation in the plasmas, especially the non-repetitive behaviors.

Bulk plasma dynamics and mode transitions during synthesis of carbon nanotubes in carbon arc discharge (captured with Phantom V7.3)
  This capability is located at the Princeton Plasma Physics Laboratory.