DATA ACQUISITION DEVICE, PAIR ANNIHILATION GAMMA RAY DETECTOR, AND PAIR ANNIHILATION GAMMA RAY DETECTION METHOD

摘要

According to an embodiment, an adder channel adds signals from an array of sensors (301) and digitizes the same, and then extracts timing and energy information. A delay-and-add channel includes individual delay lines (305) which each introduce a known delay for a respective sensor to create a time signature for said sensor (301), each being followed by an adder circuit (303) for adding delayed signals. The delay-and-add channel digitizes using a high-speed counter (509) and extracts position information. Start and stop signals for the counter are output when the adder channel output and the delay-and-add channel output respectively exceed a pulse ID threshold respectively. The pulse ID threshold is selected so that Compton scattering is minimized and an optical peak event is not removed.