Figure 15
The time-averaged brightness of the pancake and butterfly moderators as a function of beamport angle, for a moderator height of 3 cm. (a) Thermal moderators. (b) Cold moderators. In all cases, the brightness is integrated over a projected area of 6 × 3 cm (H × V), starting within 1 cm horizontally of the focal point. The cold brightness is integrated over all energies up to 20 meV. The thermal brightness is integrated over energies from 20 to 100 meV. The beamport angle is defined as counter-clockwise, with zero running along the transmitted proton beam. The brightness values on the other side of the proton beam are the same. |