At the beginning of the shift the target operator must verify
that there is a working alarm handler available from every workspace of the
All alarms must be serviced from the lowest level in the tree.
This will insure that the operator can identify the parameter which is outside
normal operations bounds. All nuisance alarms should be reported to an ``expert''
(see call for help list). The expert will determine if the limits should be changed
or if a hardware fix is needed. Do Not Change Alarm Set Points without
consulting an expert.
Make an Halog once a shift of the present status of the target (the main target
page, the charts of the running target loop and cryogenics).
At the beginning of the shift the target operator should make
sure that he/she understands the configuration of the system. This includes
the mapping of loops to cryogens and the goal temperatures for each cryogen's
control loop. In addition the status of all the motion mechanisms should be
checked (which target is in the beam).
All ioc reboots must be entered in the electronic logbook, preferably
with the keyword--target ioc reboot.
At the beginning of the shift the target operator should
determine the power load on the target (the beam off power of the high power
heater in each loop). He/she should also verify with the shift leader that the
present settings will be compatible with the shift's program
(HP heater power = maximum beam power + 50 watts).
It is necessary to contact MCC prior to making any target
motion so the FSD can be masked. Contact MCC also after moving the target so
that the FSD can be un-masked.
When the cryotarget warms up, coolant return temperature could exceed the
limit the ESR Cold Return could take. In this situation, cryo-group may need
to close their Cold Return Valve and ask us to open the Warm Return Valve.
Back to cryotarget home page
Back to Hall A home page
Back to Jefferson Lab home page