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CERN Document Server 340 Datensätze gefunden  1 - 10nächsteEnde  gehen zum Datensatz: Die Suche hat 1.30 Sekunden gedauert. 
1.
First Result from the Alpha Magnetic Spectrometer on the International Space Station: Precision Measurement of the Positron Fraction in Primary Cosmic Rays of 0.5–350 GeV / AMS Collaboration
A precision measurement by the Alpha Magnetic Spectrometer on the International Space Station of the positron fraction in primary cosmic rays in the energy range from 0.5 to 350 GeV based on 6.8×106 positron and electron events is presented. The very accurate data show that the positron fraction is steadily increasing from 10 to ∼250  GeV, but, from 20 to 250 GeV, the slope decreases by an order of magnitude. [...]
2013 - 10 p. - Published in : Phys. Rev. Lett. 110 (2013) 141102 External links: Interactions.org article; Symmetry Magazine article; Press Release
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2.
The Alpha Magnetic Spectrometer (AMS) on the International Space Station. I: Results from the test flight on the space shuttle / AMS Collaboration
The Alpha Magnetic Spectrometer (AMS) was flown 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 1– 140 GV was performed. [...]
2002 - 75 p. - Published in : Phys. Rep. 366 (2002) 331-405
- Published in : Phys. Rep. 380 (2003) 97-98
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3.
Isotopic Composition of Light Nuclei in Cosmic Rays: Results from AMS-01 / AMS-01 Collaboration
The variety of isotopes in cosmic rays allows us to study different aspects of the processes that cosmic rays undergo between the time they are produced and the time of their arrival in the heliosphere. In this paper, we present measurements of the isotopic ratios $^2$H/$^4$He, $^3$He/$^4$He, $^6$Li/$7$Li, $7$Be/($^9$Be+$^{10}$Be), and $^{10}$B/$^{11}$B in the range 0.2-1.4 GeV of kinetic energy per nucleon. [...]
arXiv:1106.2269.- 2011 - 12 p. - Published in : Astrophys. J. 736 (2011) 105 Fulltext: PDF; External link: Preprint
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4.
Relative Composition and Energy Spectra of Light Nuclei in Cosmic Rays. Results from AMS-01 / AMS-01 Collaboration
Measurement of the chemical and isotopic composition of cosmic rays is essential for the precise understanding of their propagation in the galaxy. While the model parameters are mainly determined using the B/C ratio, the study of extended sets of ratios can provide stronger constraints on the propagation models. [...]
arXiv:1008.5051.- 2010 - 13 p. - Published in : Astrophys. J. 724 (2010) 329-340 Fulltext: PDF; External link: Preprint
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5.
Cosmic-ray positron fraction measurement from 1 to 30 GeV with AMS-01 / AMS-01 Collaboration
A measurement of the cosmic ray positron fraction e+/(e+ + e-) in the energy range of 1-30 GeV is presented. The measurement is based on data taken by the AMS-01 experiment during its 10 day Space Shuttle flight in June 1998. [...]
astro-ph/0703154.- 2007 - 20 p. - Published in : Phys. Lett. B 646 (2007) 145-154 Access to fulltext document: PDF; Fulltext: S0370269307001104 - XML; arXiv:astro-ph_0703154 - PDF;
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6.
Performance of the AMS-02 Transition Radiation Detector / von Doetinchem, P. (Aachen, Tech. Hochsch.) ; Fopp, S. (Aachen, Tech. Hochsch.) ; Karpinski, W. (Aachen, Tech. Hochsch.) ; Kirn, T. (Aachen, Tech. Hochsch.) ; Luebelsmeyer, K. (Aachen, Tech. Hochsch.) ; Orboeck, J. (Aachen, Tech. Hochsch.) ; Schael, S. (Aachen, Tech. Hochsch.) ; Schultz von Dratzig, A. (Aachen, Tech. Hochsch.) ; Schwering, G. (Aachen, Tech. Hochsch.) ; Siedenburg, T. (Aachen, Tech. Hochsch.) et al.
For cosmic particle spectroscopy on the International Space Station the AMS experiment will be equipped with a Transition Radiation Detector (TRD) to improve particle identification. The TRD has 20 layers of fleece radiator with Xe/CO2 proportional mode straw tube chambers. [...]
astro-ph/0608641.- 2006 - 11 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 558 (2006) 526-535 Access to fulltext document: PDF; External link: astro-ph/0608641 PDF
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7.
Charge determination of nuclei with the AMS-02 silicon tracker / Alpat, B ; Ambrosi, G ; Azzarello, P ; Battiston, R ; Bene, P ; Bertucci, B ; Bizzaglia, S ; Bizzarri, M ; Blasko, S ; Bourquin, M et al.
The silicon tracker of the AMS-02 detector measures the trajectory in three dimensions of electrons, protons and nuclei to high precision in a dipole magnetic field and thus measures their rigidity (momentum over charge) and the sign of their charge. In addition, it measures the specific energy loss of charged particles to determine the charge magnitude. [...]
2005 - Published in : Nucl. Instrum. Methods Phys. Res., A 540 (2005) 121-130 Published version: PDF;
In : 29th International Cosmic Ray Conference, Pune, India, 3 - 10 Aug 2005, pp.299 (v.9)
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8.
Precision electroweak measurements on the $Z$ resonance / ALEPH Collaboration
We report on the final electroweak measurements performed with data taken at the Z resonance by the experiments operating at the electron-positron colliders SLC and LEP. The data consist of 17 million Z decays accumulated by the ALEPH, DELPHI, L3 and OPAL experiments at LEP, and 600 thousand Z decays by the SLD experiment using a polarised beam at SLC. [...]
hep-ex/0509008; SLAC-R-774; CERN-PH-EP-2005-041; SLAC-R-774; CERN-L3-304.- Geneva : CERN, 2006 - 302 p. ALEPH Papers - Published in : Phys. Rep. 427 (2006) 257 Fulltext: phep-2005-041 - PDF; arXiv:hep-ex_0509008 - PDF; External link: SLAC Document Server
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9.
The hadronic final state in $e^{+}e^{-}$ annihilation at c.m. energies of 13, 17 and 27.4 GeV / Cashmore, R J (Oxford U.) ; Brandelik, R. (Aachen, Tech. Hochsch.) ; Braunschweig, W. (Aachen, Tech. Hochsch.) ; Gather, K. (Aachen, Tech. Hochsch.) ; Jaax, B. (Aachen, Tech. Hochsch.) ; Kadansky, V. (Aachen, Tech. Hochsch.) ; Lubelsmeyer, K. (Aachen, Tech. Hochsch.) ; Martyn, H.U. (Aachen, Tech. Hochsch.) ; Peise, G. (Aachen, Tech. Hochsch.) ; Rimkus, J. (Aachen, Tech. Hochsch.) et al.
Results on the hadronic final state in e/sup +/e/sup -/ annihilation at 13, 17 and 27.4 GeV are presented. There is no compelling evidence for the existence of the t quark in these data, which are in general agreement with a simple quark parton model. [...]
1979 Published version: PDF;
In : International Conference on High-energy Physics, Geneva, Switzerland, 27 Jun 1979, pp.330-337
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10.
Precision cosmic ray data from AMS-01 / Wallraff, W (CERN)
2001 - Published in : PoS: hep2001 (2001) , pp. 211 Published version from PoS: PDF;
In : International Europhysics Conference on High-Energy Physics, Budapest, Hungary, 12 - 18 Jul 2001, pp.211
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