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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 105 for “"cosmic ray"”.
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Long-term variation in cosmic-ray modulation
The transport of cosmic rays inside the heliosphere can be described b the Parker equation (Parker, 1965). Since there are no full analytica solutions to the Parker equation, two first-order approximate solutions o the equation can be derived, namely the Convection-Diffusion and th Force-Field …
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ADVANCED APPLICATIONS OF COSMIC-RAY MUON RADIOGRAPHY
The passage of cosmic-ray muons through matter is dominated by the Coulomb interaction with electrons and atomic nuclei. The muons interaction with electrons leads to continuous energy loss and stopping through the process of ionization. The muon's interaction with nuclei leads to angular …
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Cosmic ray muons for spent nuclear fuel monitoring
… spent nuclear fuel stored within dry casks using cosmic ray muons is developed. The motivation stems from the need to investigate whether the stored content agrees with facility declarations to allow proliferation detection and international treaty verification. Cosmic ray muons are charged …
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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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The Cerenkov effect in cosmic ray air showers
Thesis (B.S.) Massachusetts Institute of Technology. Dept. of Physics, 1956.
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Mass entrainment and cosmic-ray energisation in Centaurus A
Contains fulltext : 147138.pdf (Publisher’s version ) (Open Access)
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Applicability of cosmic ray muon radiography to nuclear nonproliferation
… timely fashion. This procedure requires a wide array of detector modalities, alerting authorities to the presence of undeclared items, including radioactive isotopes capable arming a nuclear device. Cosmic ray muon radiography offers a passive detection system capable of probing the atomic number, …
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The cosmic ray muon energy spectum via Čerenkov radiation
… detector to measure the energy spectrum of cosmic ray muons for use in the graduate experimental physics courses, 8.811/2. The apparatus consists of a light-tight central volume with a phototube to detect the Cerenkov radiation of muons whose speed is higher than the speed of light in the …
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Towards a precise measurement of the cosmic-ray positron fraction
… concepts aiming at a precise measurement of the cosmic-ray positron fraction extending to an as yet unreached range of energy. The indirect search for dark matter is the main motivation for this endeavour. The evolution and large-scale structure of the Universe is described by the Hot Big Bang …
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Development of image processing systems for cosmic ray effect analysis
Cosmic neutron radiation in the atmosphere is a harsh environment for modern aircraft electronics. High-energy neutron interactions with silicon produce spurious charge which can cause malfunctioning or even failure to advanced microelectronic devices. To study neutron interactions, a CCD based …
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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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Radiosonde High Altitude Measurements of Radiation Levels and Cosmic Ray Events
<p>Just above us, cosmic rays are hurtling in from space. These fast moving particles crash uncontrollably into molecules in the atmosphere, causing spontaneous decays of these particles. Despite the fact that we are broadly shielded from this radiation on earth, these particles can still disturb …
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Cosmic-ray neutron sensing for soil moisture measurements in cropped fields
… background of fast neutrons, the so-called cosmic-ray neutron sensing (CRS) approach to measure field-scale soil moisture in cropped fields. Primary cosmic rays penetrate the top atmosphere and interact with atmospheric particles. Such interaction results on a cascade of high-energy …
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Measurement of Cosmic Ray Lithium Isotopes Using the Alpha Magnetic Spectrometer
The study of cosmic rays and their properties provides insight into the origins of our universe and is a unique lens on the nuclear physics of the cosmos. The identification of cosmic ray isotopes poses a particular challenge, as it requires the measurement of multiple observables to a high degree …
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Search for microquasar features in cosmic ray spectra with AMS-01
Accreting x-ray binaries are sometimes observed to emit compact, relativistic jets of cool plasma; these objects are called "microquasars". It is possible that these jets are responsible for a large flux of galactic cosmic ray protons and nuclei. The energy spectrum from these sources will be very …
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Search for cosmic-ray antiparticles with bolloon-borne and space-borne experiments
… two different approaches for the measurement of cosmic-ray antiparticles in the GeV to TeV energy range. The first part studies the prospects of antiparticle flux measurements with the proposed PEBS detector. The project allots long duration balloon flights at one of Earth's poles at an altitude …
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Dark matter searches with cosmic-ray detectors and the Square Kilometre Array
… we study the products of annihilation with cosmic-ray detectors, such as AMS, Fermi-LAT and PAMELA, and radio telescopes, such as the SKA. In this work, we focus on the positron fraction measured in the Solar System due to dark matter annihilating in the dark matter galactic halo, but also …
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