Download or read book Search for Time dependent Fluctuations in Cosmic Ray Flux with the AMS 01 Detector and Construction of the AMS 02 Detector written by Mercedes Paniccia and published by . This book was released on 2008 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: The soalr activity is known to influence the cosmic-ray flux on earth up to energies of 50 GeV per nucleon. The AMS-01 detector, which was flown on board the NASA Space Shuttle "Discovery" in June 1998, is sensitive to the highest energy range of solar particle events. Systematic flux fluctuations for the main cosmic-ray components (protons, helium nuclei and electrons) have been searched in the energy range accessible to the AMS-01 detector (from 100 Mev per nucleon to 200 GeV per nucleon) for the time interval for which suitable AMS-01 data are available (from June 8 to June 12, 1998). Systematic variations of cosmic-ray flux have been observed in the energy range below the geomagnetic cutoff. The comparison to the geomagnetic activity of the time has shown a correlation between systematic flux decreases and magnetic distrurbances of solar origin.
Download or read book Measurement of the Cosmic Lepton and Electron Fluxes with the AMS Detector on Board of the International Space Station Monitoring of the Energy Measurement in the Calorimeter written by Li Tao and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Alpha Magnetic Spectrometer (AMS) is a particle detector installed on the International Space Station; it starts to record data since May 2011. The experiment aims to identify the nature of charged cosmic rays and photons and measure their fluxes in the energy range of GeV to TeV. These measurements enable us to refine the cosmic ray propagation models, to perform indirect research of dark matter and to search for primordial antimatter (anti-helium). In this context, the data of the first years have been utilized to measure the electron flux and lepton flux (electron + positron) in the energy range of 0.5 GeV to 700 GeV. Identification of electrons requires an electrons / protons separation power of the order of 104, which is acquired by combining the information from different sub-detectors of AMS, in particular the electromagnetic calorimeter (ECAL), the tracker and the transition radiation detector (TRD). In this analysis, the numbers of electrons and leptons are estimated by fitting the distribution of the ECAL estimator and are verified using the TRD estimator: 11 million leptons are selected and analyzed. The systematic uncertainties are determined by changing the selection cuts and the fit procedure. The geometric acceptance of the detector and the selection efficiency are estimated thanks to simulated data. The differences observed on the control samples from data allow to correct the simulation. The systematic uncertainty associated to this correction is estimated by varying the control samples. In total, at 100 GeV (resp. 700 GeV), the statistic uncertainty of the lepton flux is 2% (30%) and the systematic uncertainty is 3% (40%). As the flux generally follows a power law as a function of energy, it is important to control the energy calibration. We have controlled in-situ the measurement of energy in the ECAL by comparing the electrons from flight data and from test beams, using in particular the E/p variable where p is momentum measured by the tracker. A second method of absolute calibration at low energy, independent from the tracker, is developed based on the geomagnetic cutoff effect. Two models of geomagnetic cutoff prediction, the Störmer approximation and the IGRF model, have been tested and compared. These two methods allow to control the energy calibration to a precision of 2% and to verify the stability of the ECAL performance with time.
Download or read book Search for Antimatter with the AMS Cosmic Ray Detector written by and published by . This book was released on 2003 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Antimatter search results of the Alpha Magnetic Spectrometer (AMS) detector are presented. About 108 triggers were collected in the 1998 precursor flight onboard space shuttle Discovery. This ten day mission exposed the detector on a 51.7{sup o} orbit at an altitude around 350km. Identification of charged cosmic rays is achieved by multiple energy loss and time-of-flight measurements. Bending inside the 0.15T magnetic volume yields a measurement of the absolute value of the particle's rigidity. The supplemental knowledge of the sense of traversal identifies the sign of the charge. In the rigidity range 1
Download or read book Cosmic Rays Anti deuteron Flux Sensivity of the AMS 02 Detector written by Francesca Giovacchini and published by . This book was released on 2007 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Direct Measurement of Galactic Cosmic Ray Fluxes with the Orbital Detector AMS 02 written by Diego Casadei and published by . This book was released on 2003 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Study of cosmic ray fluxes in Low Earth Orbit observed with the AMS experiment written by Gennaro Esposito,PhD and published by Gennaro Esposito, PhD. This book was released on 2003-01-01 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nothing provided
Download or read book Search for Heavy Antimatter and Energetic Photons in Cosmic Rays with the AMS 01 Detector in Space written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Une recherche d'antimatière lourde (¦Z¦>2) avec le détecteur AMS-01, embarqué sur la navette spatiale Discovery en juin 1998, est présentée. L'analyse des données n'identifie aucun candidat d'antimatière acceptable parmi un échantillon de 1.65 x 105 noyaux avec 2
Download or read book Search for Heavy Antimatter and Energetic Photons in Cosmic Rays with the AMS 01 Detector in Space written by Markus Christinziani and published by . This book was released on 2002 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: Parmi les événements observés, une trentaine sont compatibles avec les photons de haute énergie qui produisent une conversion dans la partie supérieure du détecteur.
Download or read book Space Qualification of the Transition Radiation Detector of the AMS 02 Experiment and Indirect Search for Dark Matter written by Chan-Hoon Chung and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for Anisotropies in the Arrival Directions of Charged Cosmic Rays with AMS 02 written by and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of the Positron Fraction in Cosmic Rays from 0 5 350 GeV with the AMS 02 Detector on the International Space Station written by Melanie Heil and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Search for Microquasar Features in Cosmic Ray Spectra with AMS 01 written by Benjamin Monreal and published by . This book was released on 2004 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 different from the featureless power-law expected from ordinary 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 the CR proton flux can be no more than [approximately] 2% in the range 2-50 GeV.
Download or read book Performance of the Electromagnetic Calorimeter of AMS 02 on the International Space Station Ans Measurement of the Positronic Fraction in the 1 5 350 GeV Energy Range written by Laurent Basara and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The AMS-02 experiment is a particle detector installed on the International Space Station (ISS) since May 2011, which measures the characteristics of the cosmic rays to bring answers to the problematics risen by the astroparticle physics since a few decades, in particular the study of dark matter and the search of antimatter. The phenomenological aspects of the physics of cosmic rays are reviewed in a first part. A second one describes the in-flight performances of the different subdetectors of AMS-02, in particular the electromagnetic calorimeter. It is shown, using particles at the ionizing minimum (MIPs), accounting for the main part of cosmic rays, that the calorimeter works as expected, and we find the same performances as on ground. This study is used to follow in time the evolution of the detector performances. It also allows to develop a charge estimator for the nuclei using the calorimeter. A third and final part, deals with the determination of the positronic fraction. The main difficulty of this measurement is to identify the positrons by rejecting the protons thanks to the characteristics of the showers in the calorimeter. After having defined variables relevant for this separation, we build an estimator using a multivariate analysis and Monte-Carlo simulations of electrons for the higher energies. Above 100 GeV, we obtain a rejection factor of about 10 000 at a 90% efficiency. After having estimated the charge confusion, this estimator, finally, allows us to determine the positronic ratio for the first 18 months of data and energies ranging from 1.5 to 350 GeV.
Download or read book High Charge Cosmic Rays Measurement with the AMS 02 Silicon Tracker written by Alberto Oliva (Físico) and published by . This book was released on 2007 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Particle Detectors written by Hermann Kolanoski and published by Oxford University Press. This book was released on 2020-06-30 with total page 949 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes the fundamentals of particle detectors as well as their applications. Detector development is an important part of nuclear, particle and astroparticle physics, and through its applications in radiation imaging, it paves the way for advancements in the biomedical and materials sciences. Knowledge in detector physics is one of the required skills of an experimental physicist in these fields. The breadth of knowledge required for detector development comprises many areas of physics and technology, starting from interactions of particles with matter, gas- and solid-state physics, over charge transport and signal development, to elements of microelectronics. The book's aim is to describe the fundamentals of detectors and their different variants and implementations as clearly as possible and as deeply as needed for a thorough understanding. While this comprehensive opus contains all the materials taught in experimental particle physics lectures or modules addressing detector physics at the Master's level, it also goes well beyond these basic requirements. This is an essential text for students who want to deepen their knowledge in this field. It is also a highly useful guide for lecturers and scientists looking for a starting point for detector development work.
Download or read book Time Variation of the Cosmic Ray Muon Flux in Underground Detectors and Correlation with Atmospheric Temperature written by and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Measurement of the Ultra high Energy Cosmic Ray Flux with the HiRes FADC Detector written by Andreas Zech and published by . This book was released on 2004 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt:
