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Old 06-June-2005, 02:07 PM
imported_lisa imported_lisa is offline
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International Space Station to search for dark matter of the Universe
http://english.pravda.ru/science/19/94/379...601_matter.html
A special device installed on board the ISS is said to prove the theory of dark galaxies.
A superconductive magnet is to be installed on board the International Space Station. The magnet will be used to catch dark matter, antimatter and cosmic rays...
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Old 06-June-2005, 03:00 PM
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Here's a somewhat better summary paper:
http://ams.cern.ch/AMS/Talks/ConfStuff/pro...oc/008947-1.pdf

Including this this abstract:
Quote:
AMS is a large acceptance, superconducting magnetic spectrometer which
will measure, on board of ISS Fig. ??, charged cosmic rays spectra of individual
elements below Z 25 and up to TeV region[7], high energy
rays up to few hun-
dreds GeV with good point-source localization. It will provide the most sensitive
search in cosmic rays for the existence of antimatter nuclei and for the indirect
studies of the origin of dark matter[9].
This device will not be able to 'capture' dark matter, but might observe it if it is in the form of self-annihilating weakly interacting massive particles such as neutralinos. It would detect the high energy spectral line of the annihilations.
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Old 08-June-2005, 04:29 PM
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Quote:
charged cosmic rays spectra of individual
elements below Z 25 and up to TeV region[7], high energy
rays up to few hun-
dreds GeV with good point-source localization
I think this part is overly optimistic. Even at TEV energies, charged particle trajectories are seriously bent by galactic and stellar magnetic fields; while they are weak, they have a very long time in which to act, causing scattering of even a collimated beam. I would buy it that they can precisely locate the direction of reception, but after even moderately long interstellar travel, this doesn't correlate well with point of origin. The best (long-shot) chance for the detection described would be a beam of neutrons at relativistic velocities, which would delay their decay into protons until they were in our neighborhood. It's a quibble, I know, but see Stecker's paper: http://arxiv.org/astro-ph/0309027 (Thanks again, Nereid-- the magnum opus is a great quick reference guide to the whole subject), pp. 9ff. It might work reasonably well for very local sources less than 50Mpc, but keeping track of the errors will be devilish. S
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Old 08-June-2005, 04:39 PM
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Quote:
Originally posted by wstevenbrown@Jun 8 2005, 04:29 PM
I think this part is overly optimistic. Even at TEV energies, charged particle trajectories are seriously bent by galactic and stellar magnetic fields
I think the hope is to get precise trajectories at the instrument, as opposed to the degree or two of uncertainty using current methods at these energies.
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