<story><title>The Many Methods of Communicating with Submarines</title><url>https://hackaday.com/2020/07/15/the-many-methods-of-communicating-with-submarines/</url></story><parent_chain><item><author>SaberTail</author><text>My favorite attempt to get the Department of Defense to pay for physics research is a paper that suggests building a muon storage ring and using that to generate a beam of neutrinos to communicate with submarines[1].&lt;p&gt;The physical principals are pretty sound. We do already generate neutrino beams, like at Fermilab[2]. And we do have the ability to detect neutrinos in water, optically as ANTARES[3] does, or acoustically, as SAUND[4] demonstrated.&lt;p&gt;There are some serious engineering challenges to building a muon storage ring, which is why we don&amp;#x27;t have any. If we could build them, we could build a muon collider. Muon colliders would be great. Muons are elementary particles, and don&amp;#x27;t have all the garbage inside that a proton does, and so you&amp;#x27;d get very clean signals out of such a collider, unlike the LHC. And since muons are much heavier than electrons, it&amp;#x27;s easier to get them to very high energies without losing a lot of power to synchrotron radiation.&lt;p&gt;[1] &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;arxiv.org&amp;#x2F;abs&amp;#x2F;0909.4554&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;arxiv.org&amp;#x2F;abs&amp;#x2F;0909.4554&lt;/a&gt;
[2] &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.fnal.gov&amp;#x2F;pub&amp;#x2F;science&amp;#x2F;particle-physics&amp;#x2F;experiments&amp;#x2F;neutrinos.html&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.fnal.gov&amp;#x2F;pub&amp;#x2F;science&amp;#x2F;particle-physics&amp;#x2F;experiment...&lt;/a&gt;
[3] &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;antares.in2p3.fr&amp;#x2F;Overview&amp;#x2F;index.html&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;antares.in2p3.fr&amp;#x2F;Overview&amp;#x2F;index.html&lt;/a&gt;
[4] &lt;a href=&quot;http:&amp;#x2F;&amp;#x2F;saund.stanford.edu&amp;#x2F;saund1&amp;#x2F;&quot; rel=&quot;nofollow&quot;&gt;http:&amp;#x2F;&amp;#x2F;saund.stanford.edu&amp;#x2F;saund1&amp;#x2F;&lt;/a&gt;</text></item></parent_chain><comment><author>gopalv</author><text>&amp;gt;  If we could build them, we could build a muon collider. Muon colliders would be great.&lt;p&gt;Making muons easy to make&amp;#x2F;keep will get us closer to a legit cold fusion reactor as a result.&lt;p&gt;&lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Muon-catalyzed_fusion#Viability_as_a_power_source&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;en.wikipedia.org&amp;#x2F;wiki&amp;#x2F;Muon-catalyzed_fusion#Viabilit...&lt;/a&gt;</text></comment>
<story><title>The Many Methods of Communicating with Submarines</title><url>https://hackaday.com/2020/07/15/the-many-methods-of-communicating-with-submarines/</url></story><parent_chain><item><author>SaberTail</author><text>My favorite attempt to get the Department of Defense to pay for physics research is a paper that suggests building a muon storage ring and using that to generate a beam of neutrinos to communicate with submarines[1].&lt;p&gt;The physical principals are pretty sound. We do already generate neutrino beams, like at Fermilab[2]. And we do have the ability to detect neutrinos in water, optically as ANTARES[3] does, or acoustically, as SAUND[4] demonstrated.&lt;p&gt;There are some serious engineering challenges to building a muon storage ring, which is why we don&amp;#x27;t have any. If we could build them, we could build a muon collider. Muon colliders would be great. Muons are elementary particles, and don&amp;#x27;t have all the garbage inside that a proton does, and so you&amp;#x27;d get very clean signals out of such a collider, unlike the LHC. And since muons are much heavier than electrons, it&amp;#x27;s easier to get them to very high energies without losing a lot of power to synchrotron radiation.&lt;p&gt;[1] &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;arxiv.org&amp;#x2F;abs&amp;#x2F;0909.4554&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;arxiv.org&amp;#x2F;abs&amp;#x2F;0909.4554&lt;/a&gt;
[2] &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.fnal.gov&amp;#x2F;pub&amp;#x2F;science&amp;#x2F;particle-physics&amp;#x2F;experiments&amp;#x2F;neutrinos.html&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.fnal.gov&amp;#x2F;pub&amp;#x2F;science&amp;#x2F;particle-physics&amp;#x2F;experiment...&lt;/a&gt;
[3] &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;antares.in2p3.fr&amp;#x2F;Overview&amp;#x2F;index.html&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;antares.in2p3.fr&amp;#x2F;Overview&amp;#x2F;index.html&lt;/a&gt;
[4] &lt;a href=&quot;http:&amp;#x2F;&amp;#x2F;saund.stanford.edu&amp;#x2F;saund1&amp;#x2F;&quot; rel=&quot;nofollow&quot;&gt;http:&amp;#x2F;&amp;#x2F;saund.stanford.edu&amp;#x2F;saund1&amp;#x2F;&lt;/a&gt;</text></item></parent_chain><comment><author>Enginerrrd</author><text>I&amp;#x27;ve often wondered about the feasbility of a private firm doing something similar to &lt;i&gt;dominate&lt;/i&gt; the HFT scene by getting a massive lead on information from the opposite end of the globe.</text></comment>