Figure 4
Two frames (20 s exposure time, 0.5° rotation) with the same colour scaling. (a) From the original configuration of the beryllium vacuum chamber, beryllium radiation shield and external beamstop. (b) From the new setup with the internal collimator, flexible graphite radiation shield and internal beamstop. Insets show the base temperature achievable with the respective setups and the average and maximum intensity on the image. |