Requirements for a background monitoring sensor
Available, Informative, stable, robust , fast, easy to simulate, reasonably integrated
Available : Its availabilty should not depend on BABAR to be taking data or be in some defined state.
Informative: good correlation with the key parameters of the subdetector, good background sensitivity
Stable: does not depend of the detailed setup of your detector. If so, correct for it. Should be the same reading viewed from MCC for BABAR-on and BABAR-off state. Example DCH current
should be renormalized in EPICS to take into account DCH HV voltage.
Robust : should be meaningful and available in bad background conditions: good linearity, no trip, etc..
Fast : should be available in less than 10 seconds to allow fast correlations with the machine elements
Reasonably integrated: should not be subject to statistical fluctuations greater than
>5 % in stable conditions