Global ETD Search
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 18 of 18 for “"Track reconstruction"”.
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Deep Neural Network Classifiers in CMS Track Reconstruction and in the Search for the Charged Higgs Boson
… the flight paths of charged particles called tracks inside the detector using the measurements made by the Tracker sub-detector in the heart of the CMS. The conditions present inside the detector during particle collisions demand for advanced algorithms able to be both fast and precise. The …
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Reconstructing nuclear recoil tracks in the Dark Matter Time Projection Chamber
… experiment is the fidelity of nuclear recoil track reconstruction. By extracting parameters such as the angle and vector direction of nuclear recoils, DMTPC has sensitivity to the anisotropic WIMP signal. This thesis develops a new track reconstruction algorithm motivated by the physics of …
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A Study of coherent noise in binary Read-Out Systems and its applications to the ATLAS SemiConductor Tracker end-Cap
… new physics. <br>The ATLAS Semi-Conductor Tracker (SCT) is positioned in between the other two tracking detectors (PIXEL and TRT). The SCT will provide precision tracking for charged particles using silicon micro-strip detectors. The perfomance of the SCT system mainly depends on two …
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Photomultiplier tube calibration for the Cubic Meter Dark Matter Time Projection Chamber
… to measure the Z dimensions of the particle tracks it intends to image, and thus when combined with the information from the CCDs will allow for full track reconstruction. DMTPC will use lenses on their CCD cameras, and I also measured the transparency of these lenses, and discovered that …
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Fluence-based Dosimetry using Fluorescent Nuclear Track Detectors
… for in vivo applications. Fluorescent nuclear track detectors (FNTDs) are small and biocompatible aluminum oxide plates. Their superior spatial resolution allows for track-by-track characterization of heavy charged particle fields at clinically relevant fluences. Thus, their fluence-based …
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Identified particle transverse momentum distributions from AU + AU collisions at 62.4 GeV per nucleon pair
… silicon Spectrometer, which is also used for track reconstruction and momentum-determination. The spectra are corrected for all detector-dependent effects, including feed-down from weak decays. At PT 3 GeV/c, protons are measured to be the dominant species of charged hadrons and scale much …
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Search for the Higgs Boson in H->WW Decays at the D0 Experiment and Precise Muon Tracking
… during this analysis has shown the precise track reconstruction is an essential tool for both measurements. This thesis closes with a contribution to precise tracking in the ATLAS experiment at the future Large Hadron Collider (LHC). An alignment system for ATLAS muon drift chambers at the …
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High rate and ageing studies for the drift tubes of the Atlas Muon Spectrometer
… LHC, relies on Monitored Drift Tubes (MDTs) for track reconstruction in most of its regions. The MDTs will have to sustain count rates up to 1500 Hz/cm and must be able to survive an accumulated charge of up to 0.6 C/cm during 10 years of operation. This thesis presents results of high rate and …
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ρ^' Photoproduction in ultra- peripheral heavy ion collisions with the ALICE detector
… The raw ρ' yield was approximately corrected for track reconstruction efficiency, but a full efficiency correction was not done. The detector acceptance was estimated using the STARlight Monte Carlo simulations. The efficiency-corrected ρ' mass distribution was fit with both a single Breit-Wigner …
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Imaging the ionization track of alpha recoils for the directional detection of weapons grade plutonium
… well with the expected rates, showing a 95% track reconstruction efficiency, computed from both the probability-based rate calculation and the Geant4 simulation rates. Scaling this to an appropriate size, this detector provides an entirely unique and new piece of information in the world of …
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Spectator Proton Detection and Reconstruction in Deep Inelastic <i>D(E,EP<sub>S</sub>)</i> Scattering
… face of the cylindrical detector. The particle track reconstruction software discussed in detail in this thesis uses the signals from these pads to build tracks, which are reconstructed into the drift region using the arrival times of the signals and the positions of the pads. The proton …
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Jet physics at ATLAS
… issues associated with the ATLAS Semiconductor Tracker (SCT), including a review of `noisy' modules on the SCT Barrel (from May 2007) was carried out. In addition a tool for DCS monitoring within the online monitoring framework was developed and tested during the M5 and M6 commissioning weeks. …
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A Common Readout Driver for the COMPASS Experiment
… identification has to be provided as well as track reconstruction over a wide acceptance range. <br>This requires a multitude of different detectors resulting in a large number of detector channels to be read out. <br>The COMPASS DAQ is designed as a tree-structured, fully pipelined system. …
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MEASUREMENT OF THE CKM ANGLE Gamma WITH THE Lambda_b0--> D0pK. DECAY AND COMMISSIONING OF THE UPSTREAM TRACKER AT THE LHCB EXPERIMENT.
… to this analysis is a work on the Upstream Tracker (UT) detector, installed after Long Shutdown 1 (LS1) and operational in Run 3 of the LHC. Positioned upstream of the LHCb dipole magnet, the UT improves the momentum resolution of charged particles and reduces the rate of ghost tracks. It …
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Development of reconstruction algorithms for large volume neutrino telescopes and their application to the KM3NeT detector
… current interaction. In transparent media, tracks of relativistic particles can be reconstructed detecting light produced via Cherenkov effect, with 3D arrays of optical sensors. At present the most sensitive neutrino telescope in the world is the IceCube detector at the South Pole, that …
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Search for dark matter produced in association with a Higgs boson decaying to two photons in proton-proton collisions at 13 TeV with the CMS detector
… will be integrating real-time charged particle track finding and reconstruction into a hardware data selection system. A proposed FPGA-based solution that reconstructs tracks within 4 us is discussed.
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A search for an electric dipole moment of the positive muon
Submitted by Meng Tao (mengtao2@illinois.edu) on 2012-11-14T18:38:02Z No. of bitstreams: 1 Sossong.pdf: 10860986 bytes, checksum: ad0fb279fe018de1e244ca9bfb05a9e4 (MD5)
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Minimum-error, energy-constrained source coding by sensory neurons
… limit of high spike-rates. The solution is to track the instantaneous reconstruction error, and to time spikes when the error crosses a threshold value. In the limit of large signals, the threshold level is a constant, but in general it is signal dependent. This coding model, called the neural …