Expérience pour mesurer la décomposition neutre kaon au hall est

View of the experiment in the East Hall which was measuring parameters in neutral kaon decay. The beam was coming from the top right. The three multiwire proportional chambers were arranged two on the downstream and one on the upstream side of the large (2.4X0.6 m) aperture analyzing magnet which was near the top right-hand corner of the picture 162.8.71.