Vacuum issue at HED

At 18:26 the vacuum failed in the HED CRL3 chamber in the OPTs hutch. The vacuum failed in the section and tripped the valves in the OPT hutch; it went from 1e-8 to 5 mbar in seconds. The leak is confined to the CRL chamber -- the sections upstream and downstream are not compromised and still have good vacuum. Therefore we believe the leak to be in one of the bellows of the CRL arms. This needs to be investigated tomorrow by the technicians.

The late shift is cancelled since we cannot continue with lens alignment. The night shift may continue with work on the DiPOLE laser - up to them.

BKR is informed that they may use the time for tuning.