Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 117 for “"Cosmic Rays"”.
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The Interstellar Transport of Galactic Cosmic Rays
Using the Cosmic Ray Isotope Spectrometer: CRIS) onboard the Advanced Composition Explorer: ACE) spacecraft, new and improved high-precision measurements of the elemental composition and energy spectra of galactic cosmic rays with energies from 50-550 MeV/nucleon and nuclear charge 5<=Z<=28 are …
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Cosmic rays at LOFAR: precision measurements with a radio telescope
Contains fulltext : 207473.pdf (Publisher’s version ) (Open Access)
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A search for slow, lightly ionizing particles in cosmic rays
… Slow lightly ionizing particles created in cosmic ray interactions in the atmosphere which arrived within 13 ms of the shower front were searched for. In a live time of 2.55 x 10⁵ s 394,608 showers of two or more muons and 21,038 showers of four or more muons were recorded. No multiple muon …
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Investigation of Cosmic Rays and Uses of the Cosmic Ray Telescope
No abstract prepared.
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Investigation of Cosmic Rays and Uses of the Cosmic Ray Telescope
No abstract prepared.
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SOLAR MODULATION OF GALACTIC COSMIC RAYS: TECHNIQUES & APPLICATIONS (SHOCK ACCELERATION, ANTIPROTONS)
… four topics in the theory of interplanetary cosmic-ray propagation:</p><p>The first part involves the time-dependent, spherically-symmetric, solar modulation of galactic cosmic rays. A numerical technique was introduced for the solution of this problem. A model for the solar-cycle variation …
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A compact neutron spectrometer for detecting neutrons produced by cosmic rays
The high energy secondary neutron fields from cosmic radiation that are found in aviation and space environments have impacts on both biological and technological systems. A compact neutron spectrometer that is safe to operate in an aviation environment and suitable for detecting these secondary …
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Search for antideuterons and strangelets in cosmic rays with AMS-01
… 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 a search for antideuterons (⁻D) in cosmic rays. Antideuterons in cosmic rays could be a signal for neutralino dark matter annihilation, primordial black …
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The element distribution of cosmic rays produced by white dwarf spinars.
Thesis: B.S., Massachusetts Institute of Technology, Department of Physics, 1972
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Measurement of helium isotopic composition in cosmic rays with AMS-02
The isotopic composition of helium in cosmic ray fluxes provides valuable information about cosmic ray propagation through the Galaxy, which is of particular interest to indirect dark matter searches. Helium-3, mainly a secondary cosmic ray species, is primarily produced by spallation of heavier …
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Determination of the angular distribution of cosmic rays at sea level
… to measure the zenith angular distribution of cosmic ray muons at sea level. The setup consists of two long scintillator counters with double-ended readout. Previous measurements have shown that the intensity of muons obey the cos 2 0 distribution. In this thesis, two methods are used. The …
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Precision measurement of the boron to carbon ratio in cosmic rays with AMS-02
… measurement of the Boron to Carbon ratio in cosmic rays is carried out in the range 1 GeV/n to 670 GeV/n 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 …
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Measurement of secondary cosmic rays lithium, beryllium, and boron by the alpha magnetic spectrometer
Secondary cosmic rays are mainly produced by the collisions of nuclei with the interstellar medium. The precise knowledge of secondary cosmic rays is important to understand the origin and propagation of cosmic rays in the Galaxy. In this thesis, my work on the precision measurement of secondary …
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Precision measurement of electron and positron flux in cosmic rays with the AMS-02 Detector
The cosmic ray electron and positron flux measurement can address a series of astrophysics and particle physics questions. This thesis presents an analysis of electron and positron flux from 0.5 GeV to 1 TeV using the first 30 months of data taking( over 41 billion events), with the AMS-02 detector …
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A search for Z = -1 dark matter annihilation products in cosmic rays with AMS-01
… our galaxy, producing particles visible in the cosmic ray spectrum. 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 …
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The Time-Of-Flight detector of ALICE at LHC: construction, test and commissioning with cosmic rays
… the detector has been commissioned with cosmic rays. This work aims at giving a detailed overview of the ALICE TOF detector, also focusing on the tests performed during the construction phase. The first data-taking experience and the first results obtained with cosmic rays during the …
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Design And Development Of An Autonomous Radar Receiver For The Detection Of Ultra High Energy Cosmic Rays
The detection of ultra-high energy cosmic rays is constrained by their flux, requiring detectors with apertures of hundreds or even thousands of square kilometers and close to one hundred percent duty cycle. The sheer scale that would be required of conventional detectors, to acquire sufficient …
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