I am not familiar with the experiment, so I have to ask some dumb questions:
First, I wonder how the "beam" is generated at the source, and then detected at the receiving end, and how the launch and arrival events are determined with high certainty in the first place. I assume the neutrinos come from a nuclear or particle accelerator reaction, and are produced either randomly or on demand. If they are random, then their existence and direction must be detected as the start event, but if produced on demand, then the start time is known and controlled. If the latter is true, then maybe the beam itself can be modulated somehow to carry some of the desired time and frequency information, or otherwise help to improve the measurement. I assume that it must already be controlled to some extent in time and amplitude in order to see an effect above the background level at the detector.
The next question is whether that 60 nSec or so measurement is "sharp," or is it the mean value of a large, wide distribution of measured arrival times, averaged over some long period of time. If so, then the long term stability and tracking of the references becomes more important, so it seems to me that GPSDO references would ultimately tend to track each other and work better than independent Cs references.
The final question for now is how big is the detector? As I understand, previous neutrino detectors were huge vessels of water (like abandoned salt mines) shielded from all other particle types, monitored for faint light pulses from the occasional neutrino interactions. If the detector must be on this kind of scale, then its dimensions would not allow for that kind of time resolution unless lots of light detectors are used to get the spatial information too - another time measurement issue.
Ed _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
