1 Overview
Beam monitor data comes from three loosely separate sources: Primary
proton beam monitoring devices provided by Beams Division, target and
horn monitoring devices and finally, secondary hadron and muon
monitors (PIC arrays). All are collected on a spill-by-spill basis
(additionally the secondary beam monitors will take pedestals during
out-of-spill times). The overall job of the process described here is
to get this data into the offline data stream.
Additionally, there is "environmental" monitoring (temperatures, DAQ
electronics health) which is not taken spill-by-spill. This is
considered the responsibility of the DCS and not of this process. The
exact definition of what data is pertinent to this device is given
below.
(Note: in this document the requirements or delineated
[requirement]:like this. There are also some things which are
unknown at this time and they are marked [fixme]:like this. This
document is subject to change.)