SYSTEM:
Steve said we now have accelerator studies on every other weeks. It supposed
to start on Tuesday and ends on Thursday. We recorded the highest peak
luminosity of 1.3x10**30.
Pisabox:
There was an incident when there were 12 channels of central calorimeter
went off limits but alarms were not issued. Luckly it turned out
to be a faulty reading. However it raised an issue of alarm criteria. Steve
strongly urges all the subsystems in Pisabox should have some kind of
severe alarm criteria.
CLC:
Andrea said that 1 channel of CLC is ramping very slowly and it sets off
alarm during ramping HV. We need to replace the CAEN module.
While Steve was thinking about using CLC trigger inhibit signal for
Accelerator operation, he figured out that the CLC CAEN power supply was not
setup properly for Trigger Inhibit output. There are options, under voltage,
over voltage, over current etc. to be set properly.
ICICLE:
A group the tags which were written into the oracle database at the same time
have identical time. Some people think this is confusing. Also we might can
save disk space by skipping all the time stamps except the first one.
Virus scan halted the ICICLE for 8 hours unnoticed on Monday. Magherita
promised to install a heartbeat checking sheme for the Icicle as soon as
possible.
Vnode:
Shift crews noticed that the automated Virus scan on a local pc made the
detector buttons to change from green to gray on the CDFGbAlarms page.
They said one group of buttons changed color to gray around 2 AM then
another group of buttons changed to gray after a while. These went on until
all the systems were cycled. We were told it did not hang any system
permanently though. At another time, the TOF hung when virus scan happened
during a shot setup. A few of us argued that it would be very convenient
if we can adjust scan time according to run situation. However, we were
told the lab wide automated virus scan is very hard to customize.
Documentation:
John said Jaco updated CLC documents. JC also pointed out the PSM instructions
to shift crews are outdated. Particularly for the masking and unmasking
procedures.
CCU:
Oleg said they need to work on documentations, Icicle database, and Trigger
Inhibit. Oleg is to leave back to Russia during June.