The ROSS 5800 is used in critical science experiments where a large field of view must provide concurrently space and time focused events, through various ramp speeds.
Sydor accomplishes this via a modern, computer modeled, streak tube designed with dual focus slits and a curved, matched phosphor. These enhancements drive full FOV focus quality and removes astigmatism. The ROSS 5800 can reduce edge inaccuracies of >10% down to less than 1%.
VISAR applications usually want the biggest FOV because shock breakout propogates over an area. Maintaining uniform focus in the FOV is critical, as the reconstruction of fringe data relies on per pixel nuances. The 5800 is also single photon sensitive in design – no MCP is used and therefore the spatial quality is maintained. In the time domain, the large 5800 tube sweeps a longer area providing a greater number of time resolution elements (typically 2.5x more) than other tubes. Sydor adds a DynaCal option to ensure, in-situ, that calibrated data is acquired.
Streaked Spectroscopy and Pyrometry
These may require large FOV to achieve excellent resolution over a broader spectrum. Either way, the usable area defines the spectral resolution capability. The single photon sensitive design (without an MCP) maintains the spectral/spatial uniforimity. In the time domain, the large 5800 tube provides a longer sweep allowing a larger window to see shift of spectrum or pyrometry effects over a longer period. Sydor mates a Spectrometer Interface Module providing light tight and easily adjusted alignment to the spectrometer. The ROSS software controls and calibrates the spectrometer concurrent with the streak camera.
Laser Induced Discharge
The ROSS 5800 employs a gated photocathode that provides fast shuttering to eliminate undesired light from being exposed to the system. This guarantees that only the intended portions of the event are being captured and analyzed. For longer time analysis, the large 5800 sweep area allows faster collection while preserving enough of an experimental window to be sure not to miss any data. The spatial fidelity and focus are excellent, thus providing quantitive capability to the data. The gated photocathode also acts as a safety device: the photocathode is off when not used thus protecting the system from inadvertent pulses.
The 5800 tube allows for long time sweeps, helping to account for trigger offsets/jitter, while still operating with fast resolution. The 5800 collects over a large viewing area, allowing data to be collected as the shock breakout expands. The large FOV eases alignment sensitivity to the target. The ROSS system can be operated remotely, and the photocathode gating acts as a safety shutter to protect from inadvertent light during alignment setup. Sydor adds a DynaCal option to ensure, in-situ, that calibrated data is acquired – which is especially important in harsh environments.
Similar to all the above experiments, the 5800 is useful in labs requiring very precise measurements. The 5800 also is a very effective readout device: running multiple fibers to the tube face allows the streak camera to act as a multi-channel, ultra fast strip recorder. Running at 8 picoseconds this is equivant to a 125 GHz oscilliscope.
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