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User name Yi/Chiranjib/Yawei
Log entry time 18:34:00 on April 25, 2009
Entry number 268416
keyword=Laser interlock broken
At around 4:30pm, all three COMET lasers were disabled due to "interlock
disabled". Chiranjib and Yawei then checked the laser room and found out
the interlock is actually enabled. Then by tracing the interlock voltage
level, we found out that the first interlock chassis to which the three
COMETs are connected is broken. So we re-route the interlock cable to
bypass this chassis and connect all the COMET interlock cables to the
second interlock chassis. Now the problem is solved and we enabled the
laser to continue the pumping.
A copy of this log entry has been emailed to: jpchen