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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 10 of 10 for “"drift chamber"”.
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Construction of an ultra-thin cylindrical drift chamber for measurement of the rare decay K+ [formula]
… a modified detector. The ultra-thin cylindrical drift-chamber with helical cathode strips for measurement of the axial coordinate of the charged particle track is described. A design for charge pre-amplifiers to instrument the cathode strips is discussed. The desired gain was achieved for single …
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A self-triggered readout for a time projection chamber
A self-triggering readout for a time projection chamber (TPC) is presented, with applications to novel forms of data acquisition for high energy physics application. The construction and initial testing of the readout electronics are described, as well as the readout implementation in a prototype …
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A direct search for Dirac magnetic monopoles
… offline reconstruction checks the central drift chamber for large dE/dx tracks which do not curve in the plane perpendicular to the magnetic field. We observed zero monopole candidate events in 35.7 pb⁻¹ of proton-antiproton collisions at ... = 1.96 TeV. This implies a monopole production …
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Measurement of work function in CF₄ gas
… is useful in many applications, especially as a drift gas in particle detection chambers. In order to make accurate measurements of incident particles the properties of the drift gas must be well understood. An important property of CF4 which is important for determining particle energy in …
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Detecting the invisible universe with neutrinos and dark matter
… for directional dark matter detection--a drift chamber readout using a CCD camera. The backgrounds of this detector are investigated and enumerated, and a dark matter search sets a limit at mX =100 GeV of 3.7 x 10?³³ cm².
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A Kaon Trigger for FOPI : Development and Evaluation of a Trigger System for Strange Particles
… tracks from a small fraction of the data of the drift chamber CDC. A geometrical matching to the information from the new high-precision time-of-flight detector GRPC allows the determination of the found particles' species. In order to fulfill the requirements from the data bandwidth and the …
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Präzisionsmessungen an Myondriftkammern für den CMS-Detektor und die Bedeutung des Myonsystems für die Higgs-Suche am LHC
… of the muon system, especially of the drift chambers in the barrel detector constructed with participation of the Aachen group, is explained. In the first part of the thesis the results from a Monte-Carlo-study for a decay channel interesting for the search for the Higgs boson at CMS is …
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Parameter des Alterungsprozesses und der Reanimation von Driftröhren
Die Driftröhren des ATLAS-Myon-Spektrometers sollen bis zu einer Ladung von 0.6 C/cm ohne Effizienzverluste betrieben werden können. In dieser Arbeit werden systematische Alterungsstudien mit den Driftgasen Ar-CH4-N2-CO2-(94-3-2-1) und Ar-CO2-(93-7) präsentiert. Das zuletzt genannte Gas hat selbst …
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Studies on Ageing and Reanimation of Drift Tubes for the ATLAS Muon Spectrometer
The drift tubes of the ATLAS muon spectrometer are expected to accumulate charges of <br>up to 0.6 C/cm wire during ten years of operation. Five drift gases were developed for <br>the drift tubes and tested in various ageing setups. The influence of the drift gas on <br>the ageing performance was …