Details of the sampling gate characteristics of an Image Dissector Tube (I. D.T.) have been measured for developing a time-resolved spectroscopic image detection system. Gating operation of the I. D.T. is performed by applying a 35 V pulse of short duration to the blanking electrode that is normally biased to cut-off. With this scheme, a resolution time of less than 2.8 nsec was obtained without significant deterioration of the I. D.T. gain. The X-Y deflection-coils of the I. D.T., timing-control circuits for a pulsed light source and sampling gatepulse generator, and data-acquisition circuits are controlled by a personal computer and processed data are displayed on a printer, an X-Y plotter, and a CRT. The system is capable of recordingtime-resolved spectroscopic patterns as well as transient emission or absorption waveforms at a given wavelength.
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