A Variable Dynamic Range Single-Photon Imager Designed for Multi-Radiation Tolerance
نویسندگان
چکیده
We present new measurements conducted on a single-photon imager implemented in CMOS technology. The sensor was designed to sustain massive doses of Gamma irradiation, X-rays, and proton bombardment. The chip was also designed to operate continuously in large magnetic fields without measurable noise and distortion. The imager consists of an array of 32x32 photon counting pixels with a pitch of 30μm. Each pixel comprises a single-photon avalanche diode (SPAD) based on [1], a 1-bit counter, and miniaturized readout electronics. The chip measures 2.00x2.35mm. The block diagram and a photomicrograph of the sensor are shown in Fig. 1. The pixel array is read out in rolling shutter mode via the high-speed row decoder and may be reset after each read operation or read out non-destructively. Fig. 1. Block diagram of the sensor (left). Photomicrograph of the sensor system and pixel inset (right).
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