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Literatura académica sobre el tema "Cosmic ray direct detection"

Autor: Grafiati

Publicado: 11 de marzo de 2023

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Artículos de revistas sobre el tema "Cosmic ray direct detection"

Putze, Antje. "Direct cosmic-ray detection". Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 662 (enero de 2012): S157—S163. http://dx.doi.org/10.1016/j.nima.2010.11.133.

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CHEN, CHUAN-REN. "MODEL-INDEPENDENT STUDIES OF DARK MATTER". International Journal of Modern Physics D 20, n.º 08 (15 de agosto de 2011): 1441–51. http://dx.doi.org/10.1142/s0218271811019621.

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The excess in cosmic-ray positrons and electrons observed by PAMELA, ATIC, PPB-BET and Fermi can be explained by dark matter decay or annihilation. On the other hand, the negative results from CDMS II and XENON direct detections of dark matter put an upper limit on the elastic-scattering cross section between dark matter and nucleon. We adopted model-independent approaches to study dark matter in cosmic-ray electrons, gamma-ray, relic density, direct detection experiments and LHC. We studied the distribution of the cosmic-ray electron flux observed at the Earth and found that it can reflect the initial energy spectrum of electrons generated from dark matter decay or annihilation even after propagation. We also derive constraints on the decay rate of dark matter into various two-body final states using Fermi and HESS gamma-ray data. We found that the μ+μ- or τ+τ- final state is favored in order to simultaneously explain electron excess and meet all gamma-ray constraints. Finally, we examined various tree-level induced operators of dimension six and constrain them using the current experimental data, including the WMAP data of the relic abundance and CDMS II direct detection of the spin-independent scattering. The implication of LHC search is also explored.

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Vernstrom, T., G. Heald, F. Vazza, T. J. Galvin, J. L. West, N. Locatelli, N. Fornengo y E. Pinetti. "Discovery of magnetic fields along stacked cosmic filaments as revealed by radio and X-ray emission". Monthly Notices of the Royal Astronomical Society 505, n.º 3 (11 de mayo de 2021): 4178–96. http://dx.doi.org/10.1093/mnras/stab1301.

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ABSTRACT Diffuse filaments connect galaxy clusters to form the cosmic web. Detecting these filaments could yield information on the magnetic field strength, cosmic ray population, and temperature of intercluster gas; yet, the faint and large-scale nature of these bridges makes direct detections very challenging. Using multiple independent all-sky radio and X-ray maps we stack pairs of luminous red galaxies as tracers for cluster pairs. For the first time, we detect an average surface brightness between the clusters from synchrotron (radio) and thermal (X-ray) emission with ≳5σ significance, on physical scales larger than observed to date (${\ge}3$ Mpc). We obtain a synchrotron spectral index of α ≃ −1.0 and estimates of the average magnetic field strength of $30\,\mathrm{ nG} \le B \le 60 $ nG, derived from both equipartition and inverse-Compton arguments, implying a 5–15 per cent degree of field regularity when compared with Faraday rotation measure estimates. While the X-ray detection is inline with predictions, the average radio signal comes out higher than predicted by cosmological simulations and dark matter annihilation and decay models. This discovery demonstrates that there are connective structures between mass concentrations that are significantly magnetized, and the presence of sufficient cosmic rays to produce detectable synchrotron radiation.

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Tanimori, Toru. "Detection of TeV Gamma Rays from SN1006". Symposium - International Astronomical Union 188 (1998): 121–24. http://dx.doi.org/10.1017/s0074180900114585.

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In spite of the recent progress of high energy gamma-ray astronomy, there still remains quite unclear and important problem about the origin of cosmic rays. Supernova remnants (SNRs) are the favoured site for cosmic rays up to 1016 eV, as they satisfy the requirements such as an energy input rate. But direct supporting evidence is sparse. Recently intense non-thermal X-ray emission from the rims of the Type Ia SNR SN1006 (G327.6+14.6) has been observed by ASCA (Koyama et al. 1995)and ROSAT (Willingale et al. 1996), which is considered, by attributing the emission to synchrotron radiation, to be strong evidence of shock acceleration of high energy electrons up to ~100 TeV. If so, TeV gamma rays would also be expected from inverse Compton scattering (IC) of low energy photons (mostly attributable to the 2.7 K cosmic background photons) by these electrons. By assuming the magnetic field strength (B) in the emission region of the SNR, several theorists (Pohl 1996; Mastichiadis 1996; Mastichiadis & de Jager 1996; Yoshida & Yanagita 1997) calculated the expected spectra of TeV gamma rays using the observed radio/X-ray spectra. Observation of TeV gamma rays would thus provide not only the further direct evidence of the existence of very high energy electrons but also the another important information such as the strength of the magnetic field and diffusion coefficient of the shock acceleration. With this motivation, SN1006 was observed by the CANGAROO imaging air Cerenkov telescope in 1996 March and June, also 1997 March and April.

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Morlino, Giovanni. "Supernova Remnant-Cosmic Ray connection: a modern view". Proceedings of the International Astronomical Union 12, S331 (febrero de 2017): 230–41. http://dx.doi.org/10.1017/s1743921317004793.

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AbstractThe Cosmic Ray (CR) physics has entered a new era driven by high precision measurements coming from direct detection (especially AMS-02 and PAMELA) and also from gamma-ray observations (Fermi-LAT). In this review we focus our attention on how such data impact the understanding of the supernova remnant paradigm for the origin of CRs. In particular we discuss advancement in the field concerning the three main stages of the CR life: the acceleration process, the escape from the sources and the propagation throughout the Galaxy. We show how the new data reveal a phenomenology richest than previously thought that could even challenge the current understanding of CR origin.

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Perrina, Chiara. "The future of the high energy cosmic ray detection: HERD". EPJ Web of Conferences 209 (2019): 01040. http://dx.doi.org/10.1051/epjconf/201920901040.

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The High Energy cosmic-Radiation Detection (HERD) facility will be one of the space astronomy payloads on board the future Chinese space station. The ambitious aim of HERD is the direct detection of cosmic rays towards the “knee” region (~ 1 PeV), with a detector able to measure electrons, photons and nuclei with an excellent energy resolution (1% for electrons and photons at 200 GeV and 20% for nuclei at 100 GeV - PeV), an acceptance 10 times the one of present generation missions (~ 1 m2 sr), and long life-time (> 10 years). The primary objectives of HERD are the indirect search for dark matter particles and the precise measurement of energy distribution and composition of cosmic rays from 30 GeV up to a few PeV, determining the origin of the “knee” structure of the spectrum. Furthermore, HERD will monitor the high energy gamma-ray sky from 500 MeV, observing gamma-ray bursts, active galactic nuclei, galactic microquasars, etc. HERD will be composed of a homogeneous calorimeter, surrounded by a particle tracker and a plastic scintillator detector. Two possible trackers are under study: a 5-side tracker made of silicon strip detectors and a 4-side scintillating fiber tracker with a silicon strip top tracker. The total volume of HERD will be (2.3 × 2.3 × 2.6) m3 with a weight of about 4 t. The HERD design, perspectives, expected performances in terms of energy sensitivity and acceptance will be presented in this contribution.

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Adriani, Oscar, Corrado Altomare, Giovanni Ambrosi, Philipp Azzarello, Felicia Carla Tiziana Barbato, Roberto Battiston, Bertrand Baudouy et al. "Design of an Antimatter Large Acceptance Detector In Orbit (ALADInO)". Instruments 6, n.º 2 (11 de mayo de 2022): 19. http://dx.doi.org/10.3390/instruments6020019.

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A new generation magnetic spectrometer in space will open the opportunity to investigate the frontiers in direct high-energy cosmic ray measurements and to precisely measure the amount of the rare antimatter component in cosmic rays beyond the reach of current missions. We propose the concept for an Antimatter Large Acceptance Detector In Orbit (ALADInO), designed to take over the legacy of direct measurements of cosmic rays in space performed by PAMELA and AMS-02. ALADInO features technological solutions conceived to overcome the current limitations of magnetic spectrometers in space with a layout that provides an acceptance larger than 10 m2 sr. A superconducting magnet coupled to precision tracking and time-of-flight systems can provide the required matter–antimatter separation capabilities and rigidity measurement resolution with a Maximum Detectable Rigidity better than 20 TV. The inner 3D-imaging deep calorimeter, designed to maximize the isotropic acceptance of particles, allows for the measurement of cosmic rays up to PeV energies with accurate energy resolution to precisely measure features in the cosmic ray spectra. The operations of ALADInO in the Sun–Earth L2 Lagrangian point for at least 5 years would enable unique revolutionary observations with groundbreaking discovery potentials in the field of astroparticle physics by precision measurements of electrons, positrons, and antiprotons up to 10 TeV and of nuclear cosmic rays up to PeV energies, and by the possible unambiguous detection and measurement of low-energy antideuteron and antihelium components in cosmic rays.

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Coogan, Adam, Benjamin V. Lehmann y Stefano Profumo. "Connecting direct and indirect detection with a dark spike in the cosmic-ray electron spectrum". Journal of Cosmology and Astroparticle Physics 2019, n.º 10 (28 de octubre de 2019): 063. http://dx.doi.org/10.1088/1475-7516/2019/10/063.

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Urban, Federico R., Stefano Camera y David Alonso. "Detecting ultra-high-energy cosmic ray anisotropies through harmonic cross-correlations". Astronomy & Astrophysics 652 (agosto de 2021): A41. http://dx.doi.org/10.1051/0004-6361/202038459.

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We propose an observable for ultra-high-energy cosmic ray (UHECR) physics: the harmonic-space cross-correlation power spectrum between the arrival directions of UHECRs and the large-scale cosmic structure mapped by galaxies. This cross-correlation has not yet been considered in the literature, and it permits a direct theoretical modelling of the main astrophysical components. We describe the expected form of the cross-correlation and show how, if the distribution of UHECR sources traces the large-scale cosmic structure, it could be easier to detect with current data than the UHECR auto-correlation. Moreover, the cross-correlation is more sensitive to UHECR anisotropies on smaller angular scales, it is more robust to systematic uncertainties, and it could be used to determine the redshift distribution of UHECR sources, making it a valuable tool for determining their origins and properties.

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Cheek, Andrew. "Dark Matter Physics in Neutrino Telescopes and Neutrino Physics in Dark Matter Detectors". Journal of Physics: Conference Series 2156, n.º 1 (1 de diciembre de 2021): 012215. http://dx.doi.org/10.1088/1742-6596/2156/1/012215.

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Abstract It is often the case that experiments built with a focus on a specific fundamental question are sensitive to a wider range of physical phenomena. In this proceedings I discuss two cases where new insights will come from experiments that have a different primary purpose. First, presents results from Ref. [1], which assesses what simple dark matter models will be uniquely probed by a upcoming Neutrino telescope inspired by KM3NeT. Given the existing constraints from γ-ray telescopes, measurements of the cosmic microwave background and direct dark matter detection, we focus on a secluded U(1)L μ − L γ model as particularly promising. Secondly, I present the results from Ref. [2], which describes how detecting solar neutrinos in direct dark matter detection experiments will be vital for confirming the possible U(1)L μ − L γ explanation of the anomalous magnetic moment of the muon.

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Tesis sobre el tema "Cosmic ray direct detection"

WANG, ZHAOMIN. "Measurements of Cosmic Ray Proton + Helium flux with the DAMPE experiment". Doctoral thesis, Gran Sasso Science Institute, 2020. http://hdl.handle.net/20.500.12571/9942.

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This thesis concentrates on the measurement of cosmic-ray light component (proton + helium) spectrum with the Dark Matter Particle Explorer (DAMPE). In chapter one, an introduction on cosmic-ray history is given together with the acceleration mechanism and some recent experiments. A description on DAMPE system is presented in chapter two, which includes its sub-detectors, scientific targets and parameters. There are various challenges in measuring cosmic ray energy with a limited-size calorimeter (like the BGO of DAMPE). In chapter three, various unfolding methods for reconstructing the primary energy of cosmic ray nuclei are discussed. It turns out that the method based on the Bayes theorem has the best performance on reconstructing the cosmic-ray energy for DAMPE. The test results show that the Bayes method is capable of reconstructing nuclei energy with good accuracy on both MC samples (bias within 2%) and real data that come from the test beams at CERN (bias within 3%). In chapter four, a detailed description on the measurement of cosmic ray protons + helium spectrum is presented, which involves the candidates selection, energy reconstruction and calculation of the statistical and systematic uncertainties. Finally, the proton + helium spectrum with energy 40 GeV to 100 TeV is presented.

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Reichhart, Lea. "ZEPLIN-III direct dark matter search : final results and measurements in support of next generation instruments". Thesis, University of Edinburgh, 2013. http://hdl.handle.net/1842/7914.

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Astrophysical observations give convincing evidence for a vast non-baryonic component, the so-called dark matter, accounting for over 20% of the overall content of our Universe. Direct dark matter search experiments explore the possibility of interactions of these dark matter particles with ordinary baryonic matter via elastic scattering resulting in single nuclear recoils. The ZEPLIN-III detector operated on the basis of a dualphase (liquid/gas) xenon target, recording events in two separate response channels { scintillation and ionisation. These allow discrimination between electron recoils (from background radiation) and the signal expected from Weakly Interacting Massive Particle (WIMP) elastic scatters. Following a productive first exposure, the detector was upgraded with a new array of ultra-low background photomultiplier tubes, reducing the electron recoil background by over an order of magnitude. A second major upgrade to the detector was the incorporation of a tonne-scale active veto detector system, surrounding the WIMP target. Calibration and science data taken in coincidence with ZEPLIN-III showed rejection of up to 30% of the dominant electron recoil background and over 60% of neutron induced nuclear recoils. Data taking for the second science run finished in May 2011 with a total accrued raw fiducial exposure of 1,344 kg days. With this extensive data set, from over 300 days of run time, a limit on the spin-independent WIMP-nucleon cross-section of 4.8 10-8 pb near 50 GeV/c2 WIMP mass with 90% confidence was set. This result combined with the first science run of ZEPLIN-III excludes the scalar cross-section above 3.9 10-8 pb. Studying the background data taken by the veto detector allowed a calculation of the neutron yield induced by high energy cosmic-ray muons in lead of (5.8 0.2) 10-3 neutrons/muon/(g/cm2) for a mean muon energy of 260 GeV. Measurements of this kind are of great importance for large scale direct dark matter search experiments and future rare event searches in general. Finally, this work includes a comprehensive measurement of the energy dependent quenching factor for low energy nuclear recoils in a plastic scintillator, such as from the ZEPLIN-III veto detector, increasing accuracy for future simulation packages featuring large scale plastic scintillator detector systems.

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Mertsch, Philipp. "Cosmic ray backgrounds for dark matter indirect detection". Thesis, University of Oxford, 2010. http://ora.ox.ac.uk/objects/uuid:2734b849-4d7a-4266-8538-d3dc6cab6b20.

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The identification of the relic particles which presumably constitute cold dark matter is a key challenge for astroparticle physics. Indirect methods for their detection using high energy astro- physical probes such as cosmic rays have been much discussed. In particular, recent ‘excesses’ in cosmic ray electron and positron fluxes, as well as in microwave sky maps, have been claimed to be due to the annihilation or decay of dark matter. In this thesis, we argue however that these signals are plagued by irreducible astrophysical backgrounds and show how plausible con- ventional physics can mimic the alleged dark matter signals. In chapter 1, we review evidence of, and possible particle candidates for, cold dark matter, as well as our current understanding of galactic cosmic rays and the state-of-the-art in indirect detection. All other chapters contain original work, mainly based on the author’s journal publications. In particular, in chapter 2, we consider the possibility that the rise in the positron fraction observed by the PAMELA satellite is due to the production through (hadronic) cosmic ray spallation and subsequent acceleration of positrons, in the same sources as the primary cosmic rays. We present a new (unpublished) analytical estimate of the range of possible fluctuations in the high energy electron flux due to the discreteness of plausible cosmic ray sources such as supernova remnants. Fitting our result for the total electron-positron flux measured by the Fermi satellite allows us to fix the only free parameter of the model and make an independent prediction for the positron fraction. Our explanation relies on a large number of supernova remnants nearby which are accelerating hadronic cosmic rays. Turning the argument around, we find encouraging prospects for the observation of neutrinos from such sources in km^3-scale detectors such as IceCube. Chapter 3 presents a test of this model by considering similar effects expected for nuclear secondary-to-primary ratios such as B/C. A rise predicted above O(100)GeV/n would be an unique confirmation of our explanation for a rising positron fraction and rule out the dark matter explanation. In chapter 4, we review the assumptions made in the extraction of the `WMAP haze' which has also been claimed to be due to electrons and positrons from dark matter annihilation in the Galactic centre region. We argue that the energy-dependence of their diffusion means that the extraction of the haze through fitting to templates of low frequency diffuse galactic radio emission is unreliable. The systematic effects introduced by this can, under specific circumstances, reproduce the residual, suggesting that the ‘haze’ may be just an artefact of the template subtraction. We present a summary and thoughts about further work in the epilogue.

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Halverson, Peter Georges. "Detection of high-energy cosmic ray showers by atmospheric fluorescence". Diss., The University of Arizona, 1989. http://hdl.handle.net/10150/184779.

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A novel detector for ultra-high energy cosmic rays, and its prototype are discussed. It detects events with primary energy greater than 100 PeV. (1 PeV = 1000 TeV; 1EeV = 1000 PeV.) The detector operates by sensing the near-ultraviolet scintillation light of ionized nitrogen molecules created by the passage of ionizing particles in extensive air showers. (The concept is loosely based on the highly successful Fly's Eye detector situated at Dugway, Utah.) Typical events should consist of 1 to 100 EeV primary energy showers, with near-vertical cores, passing through the detector's field-of-view at distances of 1 to 20 km. The optical field of view of the hypothetical detector would be 60 degrees wide by several (≈ 3) degrees high and would look in a near-horizontal direction at a distant mountain range or other suitably dark background roughly 20 Ian away. A typical good location would be the rim of a canyon, looking slightly downward at the other side. The field-of-view would be subdivided into 3 or more thinner ''wedges'', 60 degrees wide by, perhaps, 1 degree high. A single detector provides timing and brightness information only. Three widely-separated detectors with overlapping fields-of-view provide sufficient data to determine the core location, the zenith and azinruthal angles of the core axis, and the absolute luminosity of the cascade. Interpretation of the luminosity data would be a challenge, but it should be possible to estimate primary energy from it. The advantage of this new scheme is the enormous effective detector area per relatively low-cost detector module. Each triplet of detectors "sees" 300 square km with a typical core axis acceptance of roughly 1 sr. The construction and testing of a prototype unit has been accomplished. The field-of-view was 41 degrees wide by 2 degrees high. Light was collected by a 4.7 square meter mirror and focused onto a wave-shifter PMT system. 8 events with primary energies in the 0.1 to 1 EeV range were observed in an 8.5 hour period. Representative events are shown and preliminary data analysis is discussed.

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李耀華 y Yiu-wa Lee. "Investigation of cosmic ray intensity variation at primary rigidity above 1.7 TV". Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1986. http://hub.hku.hk/bib/B42574079.

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Lorek, Ryan James. "PIERRE AUGER OBSERVATORY AND TELESCOPEARRAY JOINT COSMIC RAY DETECTION, ANDCROSS CALIBRATION". Case Western Reserve University School of Graduate Studies / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=case155473314851704.

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Morris, Chad Michael. "Detection Techniques of Radio Emission from Ultra High Energy Cosmic Rays". The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1254506832.

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Intaniwet, Akarin. "Semiconducting polymers for real time direct X-ray detection". Thesis, University of Surrey, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.538028.

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Existing inorganic materials for radiation dosimeters suffer from several drawbacks, including their inability to cover large curved areas, lack of tissueequivalence, toxicity, and mechanical inflexibility. As an alternative to inorganics, poly(triarylamine) (PTAA)-based devices have been evaluated for their suitability for detecting radiation via the direct creation of X-ray induced photocurrents. The device was prepared by sandwiching an active layer of PT AA between a transparent indium tin oxide (ITO) b()ttom contact and a metal top contact. The charge transport properties of the device were assessed using the spectral photo current method. Increased photocurrent sensitivity was observed for samples annealed at 150°C, consistent with solvent loss, which was confirmed by thermogravimetric analysis. A diode with an Al contact shows the highest quality of recti tying junction, and it produces a high X-ray photocurrent (several nA) that is stable during continuous exposure to 50 kV Mo Ka X-radiation over long timescales, combined with a high signal-to-noise ratio with fast response times of less than 0.25 s. To optimize the performance of the device, the X-ray stopping power and the charge carrier mobility of the active layer have been modified by the introduction of various concentrations of the high atomic number bismuth oxide nanoparticles and the high mobility TIPS-pentacene organic material, respectively. The increasing of the devices' sensitivity correlates with an increased charge carrier mobility which was measured by a time-of-flight photocurrent measurement. Good stability of Xray sensitivity was found as the dosimeter was exposed to the X-ray beam for a long period of time with no discernible reduction in performance. These results indicate that PTAA is a highly-promising material for the direct detection of X-rays and potentially other types of radiation.

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Bloomer, Steven David. "The search for ultra high energy gamma ray emission from Cygnus X-3 and Hercules X-1". Thesis, University of Leeds, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238644.

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Lee, Yiu-wa. "Investigation of cosmic ray intensity variation at primary rigidity above 1.7 TV". Click to view the E-thesis via HKUTO, 1986. http://sunzi.lib.hku.hk/hkuto/record/B42574079.

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Más fuentes

Libros sobre el tema "Cosmic ray direct detection"

Bertone, Gianfranco. A Tale of Two Infinities. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780192898159.001.0001.

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The spectacular advances of modern astronomy have opened our horizon on an unexpected cosmos: a dark, mysterious Universe, populated by enigmatic entities we know very little about, like black holes, or nothing at all, like dark matter and dark energy. In this book, I discuss how the rise of a new discipline dubbed multimessenger astronomy is bringing about a revolution in our understanding of the cosmos, by combining the traditional approach based on the observation of light from celestial objects, with a new one based on other ‘messengers’—such as gravitational waves, neutrinos, and cosmic rays—that carry information from otherwise inaccessible corners of the Universe. Much has been written about the extraordinary potential of this new discipline, since the 2017 Nobel Prize in physics was awarded for the direct detection of gravitational waves. But here I will take a different angle and explore how gravitational waves and other messengers might help us break the stalemate that has been plaguing fundamental physics for four decades, and to consolidate the foundations of modern cosmology.

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Shalchi, Andreas. Nonlinear Cosmic Ray Diffusion Theories. Springer, 2009.

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Nonlinear Cosmic Ray Diffusion Theories. Springer, 2009.

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Capítulos de libros sobre el tema "Cosmic ray direct detection"

Spurio, Maurizio. "Direct Cosmic Ray Detection: Protons, Nuclei, Electrons and Antimatter". En Astronomy and Astrophysics Library, 65–99. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-96854-4_3.

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Spurio, Maurizio. "Direct Cosmic Rays Detection: Protons, Nuclei, Electrons and Antimatter". En Astronomy and Astrophysics Library, 55–86. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-08051-2_3.

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Schlickeiser, Reinhard. "Direct Observations of Cosmic Rays". En Cosmic Ray Astrophysics, 25–71. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-662-04814-6_3.

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Schnyder, Germán, Sergio Nesmachnow y Gonzalo Tancredi. "Distributed Cosmic Ray Detection Using Cloud Computing". En Communications in Computer and Information Science, 414–29. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-73353-1_29.

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Spurio, Maurizio. "Indirect Cosmic Ray Detection: Particle Showers in the Atmosphere". En Astronomy and Astrophysics Library, 101–48. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-96854-4_4.

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Zhou, Zhengdong. "Direct Iterative Basis Image Reconstruction Based on MAP-EM Algorithm for Spectral CT". En Advanced X-Ray Radiation Detection:, 219–38. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92989-3_10.

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Schnyder, Germán, Sergio Nesmachnow, Gonzalo Tancredi y Andrei Tchernykh. "Scheduling Algorithms for Distributed Cosmic Ray Detection Using Apache Mesos". En Communications in Computer and Information Science, 359–73. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-57972-6_27.

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Siu, K. K. W., S. Sidhu, G. Falzon, S. Nazaretian, S. A. Hart, J. G. Fox y R. A. Lewis. "Small Angle X-Ray Scattering Signatures for Breast Cancer Detection: Direct Comparison of Synchrotron and Laboratory X-Ray Sources". En IFMBE Proceedings, 607–10. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03879-2_170.

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Kern, Jan, Henning Schroeder, Megan Shelby, Yulia Pushkar, Benedikt Lasalle, Pieter Glatzel, Vittal K. Yachandra, Uwe Bergmann y Junko Yano. "Direct Detection of Oxygen Ligands to the Mn4Ca Complex in Photosystem II by X-ray Emission Spectroscopy". En Advanced Topics in Science and Technology in China, 231–33. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-32034-7_48.

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Kleinknecht, Konrad y Ulrich Uwer. "Symmetry Violations and Quark Flavour Physics". En Particle Physics Reference Library, 519–623. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-38207-0_9.

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AbstractOne of the surprising facts in our present understanding of the development of the Universe is the complete absence of “primordial” antimatter from the Big Bang about 13.7 billion years ago. The detection of charged cosmic-ray particles by magnetic spectrometers borne by balloons, satellites, and the space shuttle has shown no evidence for such primordial (high-energy) antibaryons; nor has the search for gamma rays from antimatter–matter annihilation yielded any such observation. In the early phases of the expanding Universe, a hot (1032 K) and dense plasma of quarks, antiquarks, leptons, antileptons and photons coexisted in equilibrium. This plasma expanded and cooled down, and matter and antimatter could recombine and annihilate into photons. If all interactions were symmetric with respect to matter and antimatter, and if baryon and lepton numbers were conserved, then all particles would finally convert to photons, and the expansion of the Universe would shift the wavelength of these photons to the far infrared region.

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Actas de conferencias sobre el tema "Cosmic ray direct detection"

Mori, Nicola y Lorenzo Pacini. "The High Energy Cosmic-Radiation Detection (HERD) facility for direct cosmic-ray measurements." En 41st International Conference on High Energy physics. Trieste, Italy: Sissa Medialab, 2022. http://dx.doi.org/10.22323/1.414.0123.

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Quinn, Sean, S. Colognes, B. Courty, B. Genolini, L. Guglielmi, P. LeBrun, M. Marton, E. Rauly, T. Trung y O. Wolf. "Auger at the Telescope Array: toward a direct cross-calibration of surface-detector stations". En 35th International Cosmic Ray Conference. Trieste, Italy: Sissa Medialab, 2017. http://dx.doi.org/10.22323/1.301.0395.

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Maestro, Paolo. "Cosmic rays: direct measurements". En The 34th International Cosmic Ray Conference. Trieste, Italy: Sissa Medialab, 2016. http://dx.doi.org/10.22323/1.236.0016.

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Mertsch, Philipp. "Rapporteur Talk: Cosmic Ray Direct". En 37th International Cosmic Ray Conference. Trieste, Italy: Sissa Medialab, 2021. http://dx.doi.org/10.22323/1.395.0044.

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Rando, Riccardo. "Gamma rays: direct observations". En 36th International Cosmic Ray Conference. Trieste, Italy: Sissa Medialab, 2019. http://dx.doi.org/10.22323/1.358.0029.

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Tomassetti, Nicola. "Direct Measurements of Galactic Cosmic Rays". En 27th European Cosmic Ray Symposium. Trieste, Italy: Sissa Medialab, 2023. http://dx.doi.org/10.22323/1.423.0007.

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Caputo, Regina. "ICRC 2021: Gamma-ray Direct Rapporteur". En 37th International Cosmic Ray Conference. Trieste, Italy: Sissa Medialab, 2021. http://dx.doi.org/10.22323/1.395.0045.

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Holt, Stephen S. "Telescope systems for x-ray astronomy". En OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1987. http://dx.doi.org/10.1364/oam.1987.wp2.

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Resumen

Because of the opacity of the atmosphere, x-ray astronomy must be conducted from space. Twenty-five years ago, the first detections of nonsolar x rays were made with simple proportional counters from sounding rockets. Collimated counters aboard rockets and satellites were used to follow up these discoveries, and more recently true x-ray telescopes have been used for the study of x rays from the cosmos. There are now thousands of cataloged x-ray sources ranging from nearby stars to distant quasars. The primary advantages afforded by telescopes for x-ray astronomy are twofold: direct imagery allows finer angular resolution than otherwise possible, and it also betters the sensitivity of the x-ray detectors via the minimization of nonsource background. The primary disadvantages are associated with the necessary grazing-incidence geometry: the effective focal length is limited by the actual telescope length, and the short-wavelength response is, therefore, sharply limited by the shallowness of the grazing angle. Examples are presented of important astronomical results that have been obtained from x-ray telescopes in space. Also presented are conceptual designs (and prototypical test results) from three different types of next-generation telescope for x-ray astronomy.

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Nuntiyakul, Waraporn, Pierre-Simon Mangeard, David Ruffolo, Paul Evenson, John W. Bieber, John Clem, Allan Hallgren et al. "Direct Determination of a Bare Neutron Counter Yield Function". En 37th International Cosmic Ray Conference. Trieste, Italy: Sissa Medialab, 2021. http://dx.doi.org/10.22323/1.395.1242.

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Burnett, T. H., S. Dake, J. H. Derrickson, W. F. Fountain, M. Fuki, J. C. Gregory, T. Hayashi et al. "The direct observation of cosmic ray composition in JACEE". En Cosmic abundances of matter. AIP, 1989. http://dx.doi.org/10.1063/1.37973.

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Informes sobre el tema "Cosmic ray direct detection"

Van Nest, Jordan D. High Altitude Cosmic Ray Detection. Ames (Iowa): Iowa State University. Library. Digital Press, enero de 2016. http://dx.doi.org/10.31274/ahac.9513.

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Van Nest, Jordan D. High Altitude Cosmic Ray Detection. Ames (Iowa): Iowa State University. Library. Digital Press, enero de 2016. http://dx.doi.org/10.31274/ahac.9765.

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Rosenberg, L. y A. Bernstein. Feasibility of Sea-level Cosmic-Ray Muon-Capture SNM Detection. Office of Scientific and Technical Information (OSTI), marzo de 2005. http://dx.doi.org/10.2172/15015181.

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Celmins, Aivars. Feasibility of Cosmic-Ray Muon Intensity Measurements for Tunnel Detection. Fort Belvoir, VA: Defense Technical Information Center, junio de 1990. http://dx.doi.org/10.21236/ada223355.

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Pan, M. Determining Muon Detection Efficiency Rates of Limited Streamer Tube Modules using Cosmic Ray Detector. Office of Scientific and Technical Information (OSTI), septiembre de 2004. http://dx.doi.org/10.2172/833115.

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Matthews, John A. J. y Michael S. Gold. Exploring the Cosmic Frontier, Task A - Direct Detection of Dark Matter, Task B - Experimental Particle Astrophysics. Office of Scientific and Technical Information (OSTI), agosto de 2016. http://dx.doi.org/10.2172/1289694.

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