[151542] in North American Network Operators' Group
Re: $1.5 billion: The cost of cutting London-Tokyo latency by 60ms
daemon@ATHENA.MIT.EDU (Marshall Eubanks)
Fri Mar 23 22:11:44 2012
In-Reply-To: <13579.1332537257@turing-police.cc.vt.edu>
Date: Fri, 23 Mar 2012 22:11:01 -0400
From: Marshall Eubanks <marshall.eubanks@gmail.com>
To: Valdis.Kletnieks@vt.edu
Cc: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On Fri, Mar 23, 2012 at 5:14 PM, <Valdis.Kletnieks@vt.edu> wrote:
> On Fri, 23 Mar 2012 13:16:59 -0700, George Herbert said:
>> The physics is not conducive to improving the situation a lot.
>>
>> There's probably $1.5 billion in the ground already in neutrino
>> detectors; the total combined detector bit rate is pretty poor. =A0One
>> experiment looking at neutrinos coming off the Fermilab accelerator
>> had 473 million accelerator pulses with under 1.1 million detected
>> neutrinos.
>
> Note that each pulse was probably millions or even billions of neutrinos,=
so
> the detection rate was even worse than you'd think. =A0I saw a statistic =
that
> every second, 50 trillion neutrinos pass through your body. =A0And the nu=
mber
> that will interact is well into the single digits.
>
Small detection numbers are not, per se, fatal to communication. What
fraction of the photons generated by a GPS satellite are captured by
your phone?
The neutrino interaction rate increases with neutrino energy, and sea
water makes a good neutrino detector. You could, for a billion
dollars, do
a LOT better than they did.
By the way, here is the original paper : http://arxiv.org/pdf/1203.2847v1.p=
df
Regards
Marshall
