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Showing 1 to 20 of 198 for “"AMS"”.
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Cosmic ray lithium isotope measurement with AMS-01
The AMS-01 detector measured charged cosmic rays during 10 days on the Space Shuttle Discovery in 1998 and collected 108 events. By identifying 8349 Lithium and 22709 Carbon nuclei from the raw data, this thesis presents the measurement of cosmic ray Lithium to Carbon ratio of presently highest …
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Ein Infrarot-Laser-Positions-Kontroll-System für das AMS-Experiment
The Anti Matter Spectrometer (AMS) is designed for the space based search for cosmic antimatter and dark matter. The AMS detector will be installed on the International Space Station (ISS) in 2003. In June 1998 a precursor version of the final AMS-02 detector was flown on board of the space shuttle …
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A transition radiation detector and gas supply system for AMS
Alpha Magnetic Spectrometer is an experiment that will be on the International Space Station for three years. It will look for anti-matter and dark matter. Supersymmetric dark matter could produce an excess in the 10-300GeV positron spectrum. A 10-6 separation of positrons from the more abundant …
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Search for antideuterons and strangelets in cosmic rays with AMS-01
AMS (the Alpha Magnetic Spectrometer) is a high-energy particle detector in space. An engineer- ing version of AMS, AMS-01, flew on the space shuttle Discovery for ten days in June 1998 and collected 108 cosmic ray events. This thesis extends the previous results of the AMS-01 flight by performing …
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Measurement of helium isotopic composition in cosmic rays with AMS-02
… matter. In six years of data taking, AMS has collected the largest available data set on fluxes of cosmic-ray helium. Events are selected to form a clean sample of galactic helium nuclei, for which velocity and rigidity give a measurement of particle mass that allows the measurement of …
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Search for microquasar features in cosmic ray spectra with AMS-01
… cosmic-ray acceleration in supernova shocks. The AMS-01 instrument measured cosmic ray protons and helium during 10 days on the Space Shuttle Discovery in 1998; we analyze this data searching for spectral distortions due to nearby microquasar activity. We show that the microquasar contribution to …
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Entwicklung und Bau eines auf Proportionalkammern basierenden Übergangsstrahlungsdetektors für das AMS-02-Weltraumexperiment
The AMS-02 experiment is a large acceptance spectrometer designed to operate in space and measure cosmic-ray fluxes on the International Space Station (ISS) for a data taking period of 3 years. The experiment will allow indirect searches of dark matter candidates with high statistics measurements …
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On-Orbit Pointing Risk Mitigation for the Agile MicroSat (AMS) CubeSat Laser Guidestar Payload
The AMS Beacon is a ½-U laser guidestar payload, scheduled to launch in April 2022 aboard the Agile MicroSat (AMS) 6-U CubeSat. The payload carries a laser with a wavelength of 976 nm and a power of up to 500 mW. The AMS Beacon will be the first to provide an active lasing low Earth orbit reference …
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Precision measurement of the boron to carbon ratio in cosmic rays with AMS-02
… using the first 30 months of flight data of AMS-02 located on the International Space Station. Above 20 GeV/n, it is the first accurate measurement. About 5 million clean Boron and Carbon nuclei are identified. The experimental and analysis challenges in achieving a high precision measurement …
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A slow-control system for the AMS-02 experiment on the International Space Station (ISS)
… the Alpha-Magnetic Spectrometer experiment, AMS-02: a complete, state-of-the-art high-energy physics experiment to be operated on the International Space Station for several years, to measure properties of cosmic rays with an unprecedented combination of precision and detection efficiency …
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AMS-14C-Analysen zur Rekonstruktion der Landschafts- und Kulturgeschichte in der Region Palpa (S-Peru)
… zur Herstellung von Graphit-Targets für AMS-Messungen (AMS = Beschleuniger-Massen-Spektrometer) aufgebaut. Die Anlage arbeitet semi-automatisch und wird mit dem eigens dafür entwickelten Steuerprogramm HAMSTER überwacht. Mit der AMS-Technik können 14C-Proben im Milli- oder …
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Precision measurement of electron and positron flux in cosmic rays with the AMS-02 Detector
… data taking( over 41 billion events), with the AMS-02 detector on the International Space Station(ISS) 330-410 km above earth. A precise calibration of the Electromagnetic Calorimeter(ECAL) signals is performed to obtain stable energy measurement. A reconstruction algorithm for electromagnetic …
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A search for Z = -1 dark matter annihilation products in cosmic rays with AMS-01
… During a ten day space shuttle flight, the AMS-01 detector recorded over 100 million cosmic ray events. This analysis searches for the products of neutralino annihilation in the AMS-01 Z=-1 spectrum, and uses the results to place limits on which supersymmetric and dark matter halo …
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A search for signatures of dark matter in the AMS-01 electron and antiproton spectrum
… annihilation in the charge Z = -1 spectrum of AMS-01 (essentially electrons and antiprotons). To avoid model dependent complications we assume that the primary annihilation channel is through W+W- production. We use the galactic propagation software GALPROP to determine the dark matter spectra …
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Antibacterial and Laundering Properties of Ams and Phmb as Finishing Agents for Healthcare Workers Uniforms
… ammonium chloride) or AEGIS Microbeshield, (AMS) and polyhexamethylene biguanide (PHMB) or Reputexâ · before laundering and after 5, 10, and 25 laundering cycles. The independent variables were the treatments (i.e., AMS, PHMB, no treatment) and the laundering cycles (i.e., 0, 5, 10, 25). The …
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The final 20 layer prototype for the AMS transition radiation detector : beamtests, data analysis, MC-studies
The AMS TRD prototype, as described in this thesis, was subjected to 2 high energy beamtests at CERN test facilities (X7,H6) in summer 2000, where more than 3 million events of p+,e-,pi- and mu- data with beam energies up to 250 GeV have been recorded. The data analysis is based solely on single …
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