HIGH-VOLTAGE NANOSECOND CONDITIONING OF THE MICROCHANNEL PLATE-SCREENVACUUM GAP

The experimental data on conditioning of the vacuum gap between the mi crochannel plate (MCP) and the screen of an image amplifier are presen ted. Conditioning is executed with high-voltage pulses of nanosecond d uration and results in a decrease in the dark currents by 1-2.5 orders of magnitude, the elimination of the emission centers on the MCP outp ut surface, and an increased voltage of arising local glow on the scre en up to two operating voltages (10 kV). The efficiency of conditionin g rises with overvoltage across the gap and with a decrease in the pul se duration.