Double frame UV/x‐ray Picoframe framing camera systems

The performance of subnanosecond‐resolution, Picoframe I and II electron‐optical framing cameras are described for the conditions of UV and soft x‐ray illumination. Experimental data are presented to show that an x‐ray sensitive Picoframe I camera can produce doublet frames having exposure times of ∼250 ps FWHM, interframe times of ∼1.5 ns with a limiting dynamic spatial resolution of 5 lp/mm. The dual‐aperture, Picoframe II camera variant was evaluated with UV and x‐ray illumination and frame periods of ∼120 ps FWHM and interframe times of 400 ps were obtained in both cases. The limiting dynamic spatial resolution was 8 l;p/mm for the UV‐sensitive Picoframe II camera but this was somewhat lower at 4.5 lp/mm for the x‐ray sensitive counterpart.