Abstract
AbstractThe time resolution of low‐energy charged particle measurements is becoming higher and higher. In order to realize high time resolution measurements, a 1‐D circular delay line anode has been developed as a high‐speed microchannel plate (MCP) anode. The maximum count rate of the 1‐D circular delay line anode is around 1 × 107/s/360°, which is much higher than the widely used resistive anode, whose maximum count rate is around 1 × 106/s/360°. In order to achieve much higher speeds, an MCP anode with application‐specific integrated circuit (ASIC) has been developed. We have decided to adopt an anode configuration in which a discrete anode is formed on a ceramic substrate, and a bare ASIC chip is installed on the back of the ceramic. It has been found that the anode can detect at a high count rate of 2 × 108/s/360°. Developments in both delay line and discrete anodes, as well as readout electronics, will be reviewed.
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