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View Full Version : Dark Matter Detector Heading to the ISS This Summer



Fraser
2010-Feb-16, 09:00 PM
The long-awaited experiment that will search for dark matter is getting closer to heading to the International Space Station. The Alpha Magnetic Spectrometer (AMS) is undergoing final testing at ESA’s Test Centre in the Netherlands before being launched on the space shuttle to the ISS, currently scheduled for July, 2010. The AMS will [...]

More... (http://www.universetoday.com/2010/02/16/dark-matter-detector-heading-to-the-iss-this-summer/)

trinitree88
2010-Feb-17, 07:20 PM
The long-awaited experiment that will search for dark matter is getting closer to heading to the International Space Station. The Alpha Magnetic Spectrometer (AMS) is undergoing final testing at ESA’s Test Centre in the Netherlands before being launched on the space shuttle to the ISS, currently scheduled for July, 2010. The AMS will [...]

More... (http://www.universetoday.com/2010/02/16/dark-matter-detector-heading-to-the-iss-this-summer/)

Fraser. Congrats to Sam Ting and his cohorts on the design, construction, and calibration of the AMS. There is a minor concept tweak. The phrase.."90% of which are protons..." refers to incoming cosmic rays. Indeed, 90% of the nuclei detected as cosmic rays are protons, with the others being heavier nuclei..."metals" in astronomer-speak. But the symmetry between charged particles is maintained, for every positive charge on a proton, an electron with a negative charge is seen, too..(or negative tau or negative muon that decays to an electron). Otherwise, the Earth would acquire a huge positive charge over time, and it doesn't. So the protons only make 50% of the particles in protium, and less than that in all the other atoms that arrive.
At least they are looking for a putative signature of some exotic particle musings locally, making one feel like our known laws of physics will carry some weight here. pete


This error is further propagated in Wiki:http://en.wikipedia.org/wiki/Cosmic_ray
same issue

Argos
2010-Feb-17, 07:24 PM
And they say there´s no useful science to be done at the ISS...