(Sako, Miyakawa)

We replaced two non-cooled beam dump at the PMC REFL and at the reflected light of PBS of power adjuster to water cooled beam dumps.

Water tubes were originally only connected to the beam shutter. We reconnect them with two additional tubes to connect all 3 cooled beam dumps in series.

Currently water is provided something like this;

chiller -> shutter -> PMC REFL -> power adjuster -> chiller

Chiller was not used for a long time with no water. We added 3.5L water to chiler and we tested water flowing to 3 damps. We did not see any water leakage on the PSL table.