J. Kissel

Since I've been staring at the thermometers at the end stations for the past few weeks, I surmised that our troubles with the Y-end ALS glitching might have something to do with temperature. It's a wild guess, but we're running out of ideas. Sadly, this one was not fruitful either. No obvious connection between the end station temperature and the ALS glitches.

To test (refute) the hypothesis, I looked at the temperature of the relavent VEA during all of the times that we've complained about the ALS glitching,
LHO aLOG 36602
    2017-06-02 Y End
    2017-05-27 Y End
LHO aLOG 31053
    2016-11-01 Y End
LHO aLOG 25523
    2016-10-14 Y End
LHO aLOG 22184
    2016-02-12 X End
    2016-02-12 Y End
LHO aLOG 15242
    2015-02-10 Y End
I take a day or two's work of temperature, and mark the times of complaint but solid black vertical lines. The times are derived from the dataviwer or DTT traces that are posted to that log.

There's no consistent answer, so it's mostly inconclusive if not refuting. Some of the days, there appears to be a temperature swing in the transmitter module, but FMCS and the receiver module are OK. Other days, there's no excursion. Some days the temperature is high and moving slowly around, other days it's normal and rock solid.

So, I think this is a red herring, unless there are suggestions to further refine the study.