Log entry time 00:01:14 on May14,2004

Entry number 121661

keyword=swing shift summary

16:00 shift start with the Hall in beam permit;
16:10 100 uA to the Hall, wait for energy spread to stablize;
16:30 start production run;
17:45 between run 3517 and 3518: RICH HV trip, reset power supply;
20:30 MCC called: problem with IOC, beam will be down for a while;
21:03 MCC called: problem not easy to solve;
23:50 MCC called: ready to restore beam, start with low current.
23:54 beam back

run summary:

run# start stop &bnsp #event comment

3515 15:21 16:13 5.6K cosmic

3516 16:34 17:06 1M normal production run
3517 17:07 17:42 1M
3518 17:49 18:20 1M
3519 18:22 18:55 1M
3520 18:56 19:24 1M
3521 19:26 19:55 1M
3522 19:56 20:24 142K ended early due to beam downtime
3523 23:57

Note about the beam time between 16:10 and 16:30:

When the beam came back, the energy spread was around 3.0E-5 (or a
little below). But we waited for about 20 minutes, hoping that it
will drop to 2.5E-5. At the end of shift we reported this period
as BNU. MCC's advice is that we should either count it as BANU, or as BNU and report immediately that the beam quality is not acceptable.

User name X. Zheng

Log entry time 00:01:14 on May14,2004

Entry number 121661