| Commission |
Commissioning is the period between installation of
equipment and systems and their operational use, such as in an experiment. A
commissioning period may include initial testing, debugging, reconfiguration,
calibration, final testing, operator training, and other activities required
to produce fully operational equipment and systems. |
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| Date |
An activity starts at 8 A.M. on the scheduled date
and ends at 8 A.M. on the day after the last day it is shown on the schedule. |
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| Development |
Accelerator development (also known as machine
development or beam development) is a period set aside for investigating and
determining operating characteristics of accelerator equipment and systems.
Approved, written test plans are the vehicle for conducting these investigations. |
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| Deinstall |
Deinstall is a period assigned to a hall for the removal
of special equipment used for a particular experiment or a set of experiments.
Operations may continue in other halls when one hall has a dismount period. |
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| Facility |
Facility Development is a period scheduled by the Nuclear
Physics Experiment Scheduling Committee which is used to meet priority needs of the
moment, including experiments, commissioning new equipment, and accelerator development.
|
| |
| GeV/pass//Pol |
The energy per pass is specified, such as .8 GeV/pass.
Pol asks if the electron beam is polarized or not. Each row in the table will
indicate Yes or No as appropriate. |
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| GeV/uA |
The beam energy scheduled for each Hall is indicated in
the table, such as 2.3 GeV. The beam current is also indicated in the table, such
as 25 uA. |
| |
| Holiday |
The accelerator and experimental halls are "locked-out"
during holiday periods, and no work or operations are scheduled without Head of
Operations or Experimental Hall Leader approval. |
| |
| Install |
Installation is a period assigned to a hall for installing
additional or new equipment. Operations may continue in other halls during an
install period. If the equipment is to be removed, this will occur typically
during a dismount or shutdown period. |
| |
| Maintenance |
A scheduled accelerator maintenance period normally
consists of one shift of tunnel access followed by two shifts of restore. If
satisfactory beam is produced in less than two shifts of restore, the available
time is normally used for accelerator development. During operating periods, it
is normal to have a maintenance day scheduled every other Tuesday. |
| |
| Restore |
Restore is a period assigned to startup the accelerator
and/or to tune the beam to meet specifications for its next scheduled use. Three or
more days of restore may be scheduled after a major shutdown or holiday period. Up to
two shifts of restore may be scheduled after one shift of maintenance. Short periods
of restore may be scheduled after a target or energy change in a hall. Restore may
also be referred to as planned or scheduled tuning. |
| |
| Shutdown |
Normally, a major shutdown is scheduled three times a
year, one in January, one after either Memorial Day or Independence Day, and one
after Labor Day. A major shutdown applies to the accelerator and all experimental
halls, and typically is for at least one week. Extensive preventive and corrective
maintenance and possibly installation of new equipment are scheduled for the
accelerator and the experimental halls during shutdown. During these periods, beam
and RF testing and recertification of the Personnel Safety System (PSS) may be
scheduled during periods when they do conflict with scheduled shutdown activities. |
