Credit: Dan Melconian
The measurement chamber of the TRIUMF Neutral Atom Trap (TRINAT) experiment where the decays of potassium-37 atoms are observed. Beta particle detectors placed above and below the trap center, along the polarization axis, measure the momenta of the beta particles in the direction of, and opposite to, the nuclear polarization, allowing the precise measurement of the asymmetry to ±0.3 percent. Not shown are two micro-channel plate detectors and an electrostatic hoop system to collect and observe the daughter recoiling ions and shake-off electrons.