Analysis of the influence of the accelerating structure on the performance of pulse-dilation framing cameras

Abstract

In this work a pulse-dilation framing camera was designed by employing a telescope imaging system. The accelerating electric field and the field emission current on the photocathode were simulated and the influence of the accelerating structure on the temporal and the spatial resolution performance of the camera were analyzed. The results reveal that the temporal and the spatial performance are drastically affected upon an increase in the accelerating distance from 1 mm to 5 mm. Moreover, the decrease of the electric field from 3 kV/mm to 0.6 kV/mm, which is caused by the increase of the temporal resolution of the camera from 3 ps to 4.5 ps are investigated. The decrease in the field emission current on the photocathode from 1.1 A/m2 to 0.21 A/m2 drastically affects the spatial resolution of the camera, which passes from 66.9 μm to 71.1 μm. This research provides a theoretical basis for the development of pulse-dilation framing cameras with higher temporal and spatial resolution.