file:jbhd8(2).jpg| A 0.8 T permanent magnet which is used to sweep away the various particles (positrons, electrons, compton, showers, etc) from the result of collimation. | file:jbhd8(2).jpg| A 0.8 T permanent magnet which is used to sweep away the various particles (positrons, electrons, compton, showers, etc) from the result of collimation. |