http://www.cnr.it/ontology/cnr/individuo/prodotto/ID62464
The Alpha Magnetic Spectrometer (AMS) on the ISS: Part 1-Results from the Test Fly on the Space Shuttle (Articolo in rivista)
- Type
- Label
- The Alpha Magnetic Spectrometer (AMS) on the ISS: Part 1-Results from the Test Fly on the Space Shuttle (Articolo in rivista) (literal)
- Anno
- 2003-01-01T00:00:00+01:00 (literal)
- Alternative label
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- Castellini G. 1, et alii 2-7 (literal)
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- Pagina fine
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- The Alpha Magnetic Spectrometer (AMS) was (own on the space shuttle Discovery during flight STS-91(June 1998) in a 51.7 orbit at altitudes between 320 and 390 km.
A search for antihelium nuclei in the rigidity range 1140 GV was performed. No antihelium nuclei were detected at any rigidity. An upper limit on the flux ratio of antihelium to helium of <1.1x10-6 was obtained.
The high energy proton, electron, positron, helium, antiproton and deuterium spectra were accurately
measured.
For each particle and nuclei two distinct spectra were observed: a higher energy spectrum and a substantial
second spectrum. Positrons in the second spectrum were found to be much more abundant than electrons.
Tracing particles from the second spectra shows that most of them travel for an extended period of time in the
geomagnetic field, and that the positive particles (p and e+) and negative ones (e-) originate from two complementary
geographic regions. The second helium spectrum flux over the energy range 0.11:2 GeV/nucleon
was measured to be (6.3 +/- 0.9)x10-3(m2 s sr)-1. Over 90 percent of the helium flux was determined to be
3He at the 90% confidence level. (literal)
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- 1 IFAC-CNR;
2 INFN-Sezione di Milano;
3 Università di Bologna e INFN-Sezione di Bologna;
4 European Laboratory for Particle Physics, CERN;
5 INFN-Sezione di Perugia e Universita' di Perugia;
6 Massachusetts Institute of Technology, Cambridge, MA, USA;
7 Chinese University of Science and Technology, USTC, Hefei, China. (literal)
- Titolo
- The Alpha Magnetic Spectrometer (AMS) on the ISS: Part 1-Results from the Test Fly on the Space Shuttle (literal)
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