The Mega Muon Decays Into An Electron And A Gamma Ray Hardware Trigger System PDF Download

The MEGA experiment is designed to search for the rare decay .mu. .-->. e .gamma. with a branching ratio sensitivity of (approximately)10−13. As is typical of rare-decay experiments, extensive, online filtering of the data is required for MEGA. The MEGA experiment uses a hardware pattern-recognition system based on Programmable Array Logic (PAL) devices. Additional events are eliminated in an online ACP system before data are written to tape. The MEGA trigger system is generally applicable where high-rate, short-propagation-delay trigger systems are required. This report contains an introduction to the MEGA experiment, a discussion of the MEGA hardware trigger system and a discussion of the system's measured performance. 4 refs., 3 figs.