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User name Antonin Vacheret
Log entry time 19:40:18 on January19,2003
Entry number 92598
keyword=RHWP scan final value
Hall C made their RHWP scan and set it to 6650
Their scan was performed during parity run 1390.
up to 8000 events, RHWP angle was 6725
8000 to 20500 RHWP angle was 6475
20500 to the end RHWP angle was 6975
If you look at the Aq/events you can see that each time our IA feedback manage to go back to zero. So the scan was not harmfull ( just a couple of minutes of high Aq values.)
Run 1406 start with the new value (actually setted to 6650 after 4700 events) it converges very quickly.
I also try to track down the bug in the feedback software during a beam off period but no new clues found about it.
Shift workers should look in feedback/runlog/ (log as apar@adaql1 and passwrd on the CH wall) to the log file to see if the software crashed each they launch a parity run. See log entry 92400 for further details.