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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 57 for “"Time Projection Chamber"”.
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Gas electron multipliers in a time projection chamber
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2003.
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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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Radioactive source measurements in a liquid xenon time projection chamber
… source measurements in a liquid xenon time projection chamber (TPC).
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Dark Matter Detection with the Dark Matter Time Projection Chamber Collaboration
… was completed as a part of the Dark Matter Time Projection Chamber (DMTPC) collaboration, a group working to create a directional dark matter detector. DMTPC detectors are designed to produce both a charge signal and scintillation light (detected by PMTs and CCDs) when an ionization event …
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Reconstructing nuclear recoil tracks in the Dark Matter Time Projection Chamber
… which experiments can search . The Dark Matter Time Projection Chamber (DMTPC) group aims to provide an unequivocal detection of WIMP particles through the anisotropy in the angular recoil spectrum. DMTPC uses a low-pressure time projection chamber filled with CF 4 gas to search for WIMPs via …
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Point by point gain calibration of the Dark Matter Time Projection Chamber
… dark matter remains a mystery. The Dark Matter Time Projection Chamber (DMTPC) is a directional detection experiment that will be able to measure the energy, length, and direction of nuclear recoil tracks induced by incoming weakly interacting massive particles (WIMPs). In this thesis I analyze …
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Photomultiplier tube calibration for the Cubic Meter Dark Matter Time Projection Chamber
… lenses to be used in the Cubic Meter Dark Matter Time Projection Chamber (DMTPC) experiment. DMTPC is a new generation of detector, which takes the idea of a standard time projection chamber and adds in some additional optical elements, such as CCDs and PMTs. The goal of DMTPC is the directional …
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Design and Analysis for the DarkSide-10 Two-Phase Argon Time Projection Chamber
… 22 percent of the total energy density with 5 times more dark matter than baryonic matter), its identity and its "direct" detection (through non-gravitational effects) has not yet been achieved. Dark matter in the form of massive, weakly interacting particles (WIMPs) could be detected through …
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Construction and Testing of a Portable Time Projection Chamber for Fast Neutron Detection
… an investigation to build a one-person portable Time Projection Chamber (TPC) for the directional detection of a source of spontaneous fission neutrons, capitalizing on the relative motion to build algorithms for rapidly locating the source of neutrons. A triple mesh avalanche setup is studied to …
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Simulation and Development of the Radial Time Projection Chamber for the BONuS12 Experiment in CLAS12
… x approaches 1. The newly designed Radial Time Projection Chamber (RTPC) for BONuS12 detects the spectator proton in coincidence with the scattered electron, which is detected in the CEBAF Large Acceptance Spectrometer (CLAS12).</p> <p>This work presents the simulation and development of …
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First limit from a surface run of a 10 liter Dark Matter Time Projection Chamber
A 10 liter prototype Dark Matter Time Projection Chamber (DMTPC) is operated on the surface of the earth at 75 Torr using carbon-tetrafluoride (CF4) as a target material to obtain a 24.57 gram-day exposure. A limit is set on a likely dark matter candidate, the weakly interacting massive particle. …
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A measurement of the rate of muon capture in an ultra-pure protium gas time projection chamber
… protium gas to a precision of 15 ppm using a time projection chamber (TPC). Combined with precise knowledge of the rate of free muon decay, this determines the capture rate for the mu-p atom in the singlet hyperfine state, L_S, with a precision of 1%. The experimental conditions suppress …
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An assessment of the sensitivity of a low pressure time projection chamber to the direction of WIMP-induced nuclear recoils/
… in the galactic reference frame. The Dark Matter Time Projection Chamber (DMTPC) collaboration develops TPCs with optical readout whose goal is the detection of the sense and direction of nuclear recoils generated by dark matter interactions with carbon and fluorine atoms in low pressure CF 4 gas, …
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An analysis of the sensitivity of a low pressure time projection chamber to a directional anisotropy due to WIMP interactions
The Dark Matter Time Projection Chamber (DMTPC) collaboration is a dark matter direct detection effort which develops TPCs to observe and reconstruct nuclear recoils generated by incident particles. If some of these recoils are the result of dark matter interactions, we can in theory observe an …
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The Light Response of the XENON100 Time Projection Chamber and the Measurements of the Optical Parameters with the Xenon Scintillation Light
… the target liquid xenon mass to 61 kg with a 100 times reduction in background rate enabling a large increase in sensitivity to WIMP- nucleon interaction cross-section. To-date, the most stringent limit on this cross-section over a wide range of WIMP masses have been obtained with XENON100. …
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Characterization of electroluminescence signals from nuclear recoil events in the dual-phase argon Time Projection Chamber of the Red experiment with Convolutional Autoencoders
… a multi-ton dual-phase liquid argon Time Projection Chamber (LAr TPC) under construction at INFN Laboratori Nazionali del Gran Sasso. This detector will identify WIMP-nucleon scattering events by detecting both prompt scintillation light and ionization charge, with the latter measured …
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Cosmic-ray interactions in charged-couple devices in the DMTPC 4-shooter detector
The Dark Matter Time Projection Chamber (DMTPC) is a low pressure (CF 4) detector that measures the two-dimensional vector direction of nuclear recoils, and it aims to directly detect dark matter. This paper explores cosmic ray interactions with the four charge-coupled devices (CCDs) of the …
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Ultraviolet laser calibration of drift chambers
… laser as a track calibration source in drift chambers, and specifically in a small time projection chamber (TPC). Drift chambers such as TPCs reconstruct the trajectories of charged particles by amplifying and collecting electrons produced by ionization of gas atoms with which the target …
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A model of the directional sensitivity of low-pressure CF₄ dark matter detectors
… more mundane backgrounds. The Dark Matter Time Projection Chamber (DMTPC) collaboration is actively working on a directional detection method using low-pressure CF₄ gas detectors with optical readout. This work constructs a model for the directional reconstruction ability of DMTPC …
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Measurement of work function in CF₄ gas
… 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 detectors, the work function, is …
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