500 research outputs found
The AMS-02 Anticoincidence Counter
The AMS-02 detector will measure cosmic rays on the International Space
Station. This contribution will cover production, testing, space qualification
and integration of the AMS-02 anticoincidence counter. The anticoincidence
counter is needed to to assure a clean track reconstruction for the charge
determination and to reduce the trigger rate during periods of high flux.Comment: IPRD08 conference proceeding. Will be published in Nuclear Physics B
(Proceedings Supplement
Performance of the AMS-02 Transition Radiation Detector
For cosmic particle spectroscopy on the International Space Station the AMS
experiment will be equipped with a Transition Radiation Detector (TRD) to
improve particle identification. The TRD has 20 layers of fleece radiator with
Xe/CO2 proportional mode straw tube chambers. They are supported in a conically
shaped octagon structure made of CFC-Al-honeycomb. For low power consumption VA
analog multiplexers are used as front-end readout. A 20 layer prototype built
from final design components has achieved proton rejections from 100 to 2000 at
90% electron efficiency for proton beam energies up to 250 GeV with cluster
counting, likelihood and neural net selection algorithms.Comment: 11 pages, 25 figures, espcrc2.sty (elsevier 2-column
Биогеохимические исследования урбанизированных ландшафтов восточной Финляндии
Объектом исследования являются урбанизированные ландшафты трех городов Восточной Финляндии г. Юука, г. Оутокумпу, г. Миккели. Цель работы - биогеохимические исследования урбанизированных ландшафтов восточной Финляндии по результатам исследования проб почв, листьев и стеблей черники, лишайника, листьев древесных растений. В процессе исследования проводились обзор и анализ ранее проведенных работ, анализы литературных, нормативных и фондовых источников, анализировались статистических данные и элементный состав комплекса природных сред. В результате исследования была изучена геоэкологическая обстановка урбанизированных территорий Восточной Финляндии Степень внедрения результатов: полученный анализ эколого-геохимической ситуации урбанизированных территорий Финляндии является составной частью комплексного эколого-геохимического мониторинга территорий, проводимого кафедрой ГЭГХ ТПУ. Аналитический материал будет использован в учебном процессе. Область применения: результаты эколого-геохимического мониторинга урбанизированных территорий Финляндии могут быть использованы природоохранными организациями для ориентировочных данных по содержанию химических элементов в почвах и живых объектах городских агломераций.Object of research are urban landscapes of the three cities in the Eastern Finland city of Juuka, in Outokumpu, the city of Mikkeli. Purpose - biogeochemical studies of the urban landscape of Eastern Finland the results of the research of samples of soil, leaves and stems of bilberry, lichen, leaves of woody plants. In the process of investigation the review and analysis of earlier conducted works, literary analyses, regulatory and archival sources, analyzed statistical data and elemental composition of complex natural environments. The study was studied geo-ecological situation in the urbanized territories of Eastern Finland level of implementation of results: the analysis of environmental and geochemical situation in the urbanized territories of Finland is part of an integrated ecological-geochemical monitoring of the territories held by the Department GEGH TPU. Analytical material will be used in the educational process. Application field: the results of ecological-geochemical monitoring in the urbanized territories of Finland can be used by conservation organizations for estimates on the content of chemical elements in the soils and the living facilities of urban agglomerations
A Study of Cosmic Ray Secondaries Induced by the Mir Space Station Using AMS-01
The Alpha Magnetic Spectrometer (AMS-02) is a high energy particle physics
experiment that will study cosmic rays in the to range and will be installed on the International Space Station
(ISS) for at least 3 years. A first version of AMS-02, AMS-01, flew aboard the
space shuttle \emph{Discovery} from June 2 to June 12, 1998, and collected
cosmic ray triggers. Part of the \emph{Mir} space station was within the
AMS-01 field of view during the four day \emph{Mir} docking phase of this
flight. We have reconstructed an image of this part of the \emph{Mir} space
station using secondary and emissions from primary cosmic rays
interacting with \emph{Mir}. This is the first time this reconstruction was
performed in AMS-01, and it is important for understanding potential
backgrounds during the 3 year AMS-02 mission.Comment: To be submitted to NIM B Added material requested by referee. Minor
stylistic and grammer change
Protons in near earth orbit
The proton spectrum in the kinetic energy range 0.1 to 200 GeV was measured
by the Alpha Magnetic Spectrometer (AMS) during space shuttle flight STS-91 at
an altitude of 380 km. Above the geomagnetic cutoff the observed spectrum is
parameterized by a power law. Below the geomagnetic cutoff a substantial second
spectrum was observed concentrated at equatorial latitudes with a flux ~ 70
m^-2 sec^-1 sr^-1. Most of these second spectrum protons follow a complicated
trajectory and originate from a restricted geographic region.Comment: 19 pages, Latex, 7 .eps figure
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