[Xrayops] Shutter permit will be removed at 13:00hrs.

[APS Experiment Hall X-ray Operations Problem List]

Due to an issue with a DI H2O secondary pump in BLG.450, shutter permit will be removed and beam dumped at 13:00 hrs, to facilitate repairs. We expect User beam will be restored at approx. 14:00. The switchover to the back-up pump will cause a pressure spike which may trip multiple pumps providing DI water to the User and accelerator system equipment.

Delaying the repair would most likely result in catastrophic failure of the Bldg. 450 pump and a lengthy downtime.

Karen Schroeder