Medium speed gating of ISIT tubes

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Abstract
Image intensified silicon vidicon tubes (SITs) and doubly intensified vidicon tubes (ISITs) are useful in time‐resolved spectroscopy studies, when gated by a kilovolt pulse applied to the tube gate or photocathode electrode. An ISIT detector, used in conjunction with the Princeton Applied Research Corporation (PARC) optical multichannel analyzer (OMA), has been gated by HV pulses as short as 30–50 ns. A simple modification of that ISIT reduced the minimum gate pulse width of the ISIT to 5 ns. The time and spatial resolution are primarily limited by the pulse distortion introduced by the various stray reactances in the gate coupling circuitry, regardless of the conductivity of the photocathode.

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