Single-event transient (SET)
Beginner
A quick false blip on a wire, caused by a particle hit.
Novice
A brief false voltage pulse in a logic circuit caused by a particle strike. It does harm only if a flip-flop happens to store it when the clock ticks.
Expert
A glitch on a data path that arrives at the clock edge is captured by all three copies of a basic TMR flip-flop at once, so TMR alone doesn’t stop it. Transient filters, tripled logic and voters, and timing offsets between copies address this.
Explained in Space (Industries).