To further improve diffused light issues on B1s, the idea was to reduce its path as much as possible and dump it directly at the level of the detection window.
In order to cope with problems of power, we developped a new beam dump made of a few silicon plates placed at brewster angle (silicon is high power compatible and gets low diffusing properties).
These plates are hold with a copper structure for heat evacuation (see picture-left). After crossing the plates, the power is reduced by a factor 6 and the remaining beam is dumped by a "standard" absorbing glass beam dump (see picture-right).
