Log entry time 09:42:56 on July10,2004

Entry number 128104

 Looking through the septa temperature history (using the
JavaArchiverClient, which is available from the Hall A tool
button on the hacuser desktop, and which is fairly easy
to use), I see that the 6 thermistor values from the two
septa (upper coil, lower coil, yoke), all flatlined
at the same time, and that was July 6, just after 10:00 AM.
Don't know if this information is useful,,,


One lesson: if the septa strip charts don't show that these
temperatures vary (with beam off) at the least significant
bit (0.05 K) level, then it means that they are not being
readout properly. Another clue is if beam-off temperatures
don't match well with previous data - eg, if the right
septum upper coil is not the highest of the temps, there
is likely a readout problem. 

The figure below shows the temperature history from
July until July 8; one sees beam on/off data at the
beginning, lots of beam-off data with valid readout, then
the flatline traces.