[time-nuts] Those pesky Neutrinos again...
hmurray at megapathdsl.net
Mon Nov 21 03:49:13 EST 2011
michael.cook at sfr.fr said:
> I heard on the BBC the other day that a repeat experiment is planned,
> firing neurinos from the US into Canada. The labs were not cited, but I
> expect it would be Fermilab to Sudbury Ontario. If this is the case, then
> there will still be the problem of not being able to run a parallel fibre
> as the Sudbury detectors are also deep underground. ...
I don't think that running a parallel fiber will help much. I see two
First, fibers don't run in straight lines. Even if you could accurately
survey the pipes in the ground, there is slack in the fiber within the cable
bundle so it doesn't break if somebody pulls on the cable.
Second, the speed of light in fibers isn't known to the required level of
accuracy. (It's probably temperature dependent.)
In the context of fibers, having the detectors located deep underground in
not a problem. They have to get power and data cables down to the
instruments somehow. It would be easy to run a fiber in parallel with those
There is also the delay in the amplifiers that you will need every 100 miles
or so. Or the low rise time if you try to avoid the amplifiers because you
don't need much bandwidth...
These are my opinions, not necessarily my employer's. I hate spam.
More information about the time-nuts