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Re: GRAND plans for new neutrino observatory

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On Thu, 20 Aug 2015 19:04:54 -0500, gilber34 wrote:

> 
> continued;  (the real problem is noise, broad band noise, lightning, FM 
> radio,etc)
> 

That's why we have to get back to the moon to establish research
bases on the dark side.

Forget about that goddamned useless Mars venture.  We should divert
all Mars resources to a moon project.














> Another major challenge will be screening out background interference.
> The researchers calculate that for every cosmic neutrino it detects,
> GRAND could register as many as a billion events generated by
> terrestrial sources – such as commercial radio transmissions or
> thunderstorms. To accurately distinguish their signal from the noise,
> the researchers are building a prototype array of 35 antennas in the
> Tian Shan mountains in north-west China. With results from the prototype
> array expected in 2018, and assuming funding can be obtained from China
> and other countries, Martineau-Huynh hopes that GRAND might switch on in
> 2022.
> 
> Cosmic nt s can produce t particles underground through charged current 
> interaction. ts travel to the surface of the Earth and decay in the 
> atmosphere, generating Earth-skimming extensive air showers (EAS)1 [1, 
> 2]. Coherent electromagnetic radiation is associated to the shower 
> development at frequencies of a few to hundreds of MHz at a detectable 
> level for showers with E & 1017 eV. The strong beaming of the 
> electromagnetic emission combined with the transparency of the 
> atmosphere to radio waves will allow the radio-detection of EAS 
> initiated by t decays at distances up to several tens of kilometers. 
> Radio antennas are thus ideal instruments for this purpose. Furthermore,
> they offer practical advantages (limited unit cost, easiness of 
> deployment, ...) that allow the deployment of an array over very large 
> areas, as required by the expected low neutrino rate.
> 
> Remote sites, with low electromagnetic background, should obviously be 
> considered for the array location. In addition, mountain ranges are 
> preferred, first because they offer an additional target for the 
> neutrinos, and also because mountain slopes are better suited to the 
> detection of horizontal showers compared to flat areas, parallel to the 
> showers trajectories.
> 
> GRAND antennas are foreseen to operate in the 30􀀀100MHz frequency band. 
> Short wave background prevents detection below this range, and above the 
> coherence of the geomagnetic emission fades. However, an extension of 
> the antenna response up to 200􀀀300MHz would enable us to observe the 
> Cherenkov ring associated with the air shower, that represents a sizable 
> fraction of the total electromagnetic signal and may provide an 
> unambiguous signature for background rejection.
> 
> Another major problem is timing of signal events

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GRAND plans for new neutrino observatory Sam Wormley <swormley1@gmail.com> - 2015-08-20 18:36 -0500
  Re: GRAND plans for new neutrino observatory gilber34 <invalid@invalid.com> - 2015-08-20 19:04 -0500
    Re: GRAND plans for new neutrino observatory Fabian Russell <root@localhost.localdomain> - 2015-08-21 06:02 +0000
      Re: GRAND plans for new neutrino observatory Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2015-08-21 03:09 -0400
        Re: GRAND plans for new neutrino observatory Fabian Russell <root@localhost.localdomain> - 2015-08-21 18:23 +0000
          Re: GRAND plans for new neutrino observatory Yousuf Khan <bbbl67@spammenot.yahoo.com> - 2015-08-24 02:26 -0400
        Re: GRAND plans for new neutrino observatory Fabian Russell <root@localhost.localdomain> - 2015-08-21 18:53 +0000
      Re: GRAND plans for new neutrino observatory HVAC <Mr.HVAC@gmail.com> - 2015-08-21 08:43 -0400
      Re: GRAND plans for new neutrino observatory gilber34 <invalid@invalid.com> - 2015-08-21 08:24 -0500
        Re: GRAND plans for new neutrino observatory Fabian Russell <root@localhost.localdomain> - 2015-08-21 18:33 +0000
          Re: GRAND plans for new neutrino observatory gilber34 <invalid@invalid.com> - 2015-08-21 14:09 -0500
      Re: GRAND plans for new neutrino observatory "reber g=emc^2" <herbertglazier0@gmail.com> - 2015-08-21 09:04 -0700
        Re: GRAND plans for new neutrino observatory HVAC <Mr.HVAC@gmail.com> - 2015-08-21 12:23 -0400
        Re: GRAND plans for new neutrino observatory "hanson" <hanson@quick.net> - 2015-08-21 09:42 -0700

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