Main INDEX
Monthly INDEX
PREV
NEXT
User name L.Tang
Log entry time 23:59:17 on April 4,1999
Entry number 11364
This entry is a followup to: 11363
keyword=Swing shift record and summary
16:00 Still in the process of reset the HMS Q2
16:15 HMS Q2 tripped again 1 minute after the previous reset was completed.
Radiator: 2%, beam current: 40 uA. We took a SOS run instead.
16:35 MCC took the beam away for regular system check.
17:26 Q2 tripped again before MCC give us CW beam.
17:29 Beam back on but Q2 is not ready yet. Start another SOS run.
17:34 Q2 tripped again before reaching its set current. It is struggling.
18:43 We finally brought Q2 back by removing beam. We will try to start
with lower beam current (20uA) for one test run.
18:51 Q1 tripped and need to reboot.
19:39 Q2 tripped again.
20:40 Q3 and D tripped. Took SOS run only while reset HMS magnets.
21:16 Q2 tripped during SOS run.
23:13 Q2 trips again (rebooting)
23:40 Before Q2 is ready Q1 tripped.
Overall we have been struggling all night long to reset HMS. Most of the
time is Q2. Since 18:43 we have been using only 20uA beam. Also, each
time Q2 tripped, we have to remove beam in order to bring it back.