Development of Vacuum Ultraviolet Streak Camera System for the Evaluation of Vacuum Ultraviolet Emitting Materials

摘要

Details of the design and development of a bright vacuum ultraviolet Seya-Namioka type spectrometer and streak camera system with reflection-type input optics is presented. The Seya-Namioka spectrometer has a 40 mm by 45 mm holographic grating with a groove density of 600 grooves/mm, linear dispersion of 8 nm/mm, and effective F-number of 4.2. To eliminate loss of light by absorption, the streak camera imaging unit uses Al and MgF_2 coated imaging optics with at least 80% reflection from 125-850 nm and has an effective F-number of 4, It is equipped with a synchronized scan unit that can be tuned to 82 MHz and a slow scan speed unit that can measure up to 2-MHz single event. Temporal response of the system at the 20-ns scanning range is evaluated to be around 260 ps.