On Mon, Oct 24, 2011 at 8:39 PM, WarrenS <[email protected]> wrote: > I have a more basic time-nut question. Why is it a problem at all? > How can the time uncertainty between two known and fixed locations be that > large?
Hi, sorry I am not checking my non-CERN account very often these days. I do not know the MINOS timing system at all. I can only speak for the CERN-LNGS system. I guess the 70 ns refers to short-term noise, which could be solved by a number of means people in this list know well. We chose a traditional common view arrangement. There is only one thing I'd like to point out in this list: the original goal of both the MINOS and OPERA experiments was *not* to measure the neutrino time of flight. That measurement just turned out to be possible with the available infrastructure and some extra effort in the CERN-LNGS case. These experiments were designed to study neutrino oscillations, i.e. the mechanism whereby a neutrino of one type (electron, muon or tau) turns into a neutrino of another type. In principle, for such experiments, one only needs timing to make sure the neutrinos detected on the far end have a very good chance of coming from your controlled source and not from the Sun or other sources. This can be done without much regard to high precision. Some 100 ns are OK. If neutrino time-of-flight had been the original goal of these experiments, quite a number of things would have been done differently from the start. I am very happy to see the MINOS people are contacting the right specialists. We are very eager to see results from an independent experiment! Cheers, Javier _______________________________________________ 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.
