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 20 of 35 for “"mass measurement"”.
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An absolute method for aerosol particle mass measurement
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1982.
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W mass measurement with muons at SQRT.S. = 1.8 TeV
The mass of the W vector boson has been measured from an analysis of $W \to\ \mu\ \nu$ decays in the CDF detector at the Fermilab Tevatron $\bar p p$ collider. The mass is 79.90 $\pm$ 0.53(stat.) $\pm$ 0.31(sys.) $\pm$ 0.16(scale) GeV/c$\sp2$. When this result is combined with previous CDF …
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Techniques for direct neutrino mass measurement utilizing tritium [beta]-decay
… performed in the service to two direct neutrino mass experiments, namely KATRIN at the Karlsruhe Institute of Technology in Karlsruhe, Germany and Project8 at the University of Washington in Seattle. These experiments aim to utilize a measurement of the shape of the endpoint of the tritium beta …
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A New Mass Measurement for Galaxy Clusters Using Position and Radial Velocity
… the Universe, and the evolution ofgalaxy cluster mass profiles is a useful tool for constraining cosmological models. Mostmethods established for obtaining a mass profile of a cluster of galaxies assumes theclusters obey the virial theorem; however, the majority of clusters are observed to …
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Top quark mass measurement in the electron+jets decay channel using the Matrix Element Method
… in the course of the year 2012 at a center of mass energy of 8 TeV. Data recorded by the Compact Muon Solenoid at CERN, were filtered in order to isolate collisions giving rise to a top anti-top quark pair. These quarks decay into an electron and four jets. For a recorded luminosity 19.8 fb-1, …
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Top quark mass measurement in the Lepton+Jets channel using full simulation of the CMS detector
… the analyses of top quark reconstruction and mass measurement in two different scenarios. In the first analysis a first physics scenario is taken as a basis where no jet flavour information (e.g. b tagging) and only a reduced detector acceptance region for electron identification is assumed. …
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A mass measurement of the short-lived halo nucleus ¹¹Li with the TITAN Penning trap spectrometer
New measurements of the masses of the isotopes⁸,⁹,¹¹Li were made using recently commissioned TITAN Penning trap mass spectrometer at TRIUMF. The measurement of the halo nucleus ¹¹Li represents a new standard in Penning trap mass spectrometry, as it is the shortest lived, t₁/₂ = 8.8 ms, isotope ever …
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A structurally coupled disturbance analysis method using dynamic mass measurement techniques, with application to spacecraft-reaction wheel systems
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2001.
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Sensitivity of the Top quark mass measurement with the CMS experiment at LHC using t-tbar multijet simulated events
… to the samples generated at different top quark masses. The top quark mass candidate is reconstructed for all those samples using a kinematic fitter. The resulting distributions are used to build p.d.f.’s, interpolating them with a continuous arbitrary curve. These curves are used to perform the …
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The factors and protocols that influence, accuracy, precision and uncertainty of accurate mass measurements by FT-ICR ms to validate the assignment of elemental composition
The need for very accurate mass measurements of compounds is becoming more demanding with the expansion of the number of compounds in need of correct identification and with the limits of elemental analysis; a fast, robust analytical solution is sought. Fourier transform ion cyclotron resonance …
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The hunting of the squark: experimental strategies in the search for supersymmetry at the Large Hadron Collider
… the concepts behind a set of transverse mass-bound variables, and explores connections between these variables and others in the literature. Not only are these variables important tools for mass measurement, should sparticles be seen at the LHC, they are also critical components of …
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Rapid identification, confirmation, and quantitation using an open-air ion source coupled to a time-of-flight mass spectrometer
… ability to identify and confirm a compound using mass spectrometry usually involves time consuming sample preparation and method development. The open-air ion source DART (Direct Analysis in Real Time) can ionize compounds in the gas, solid, or liquid phase without chromatography or sample …
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Characterizing the background in tt events with a J/ψ → µ −µ + in proton-proton collisions at √ s = 13 TeV using the ATLAS detector
So far, various measurements have been performed for the top quark mass using jets as a dominant experimental signature. The leading precision measurement of 1732.44 ±0.13±0.47 GeV is a combination of top quark mass measurements conducted by the CMS collaboration. However, these various …
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Advances in Fast Atom Bombardment Mass-Spectrometry (Glycosphingolipids, Nucleotides, Markers, Negative Ion)
… introduced technique of fast atom bombardment mass spectrometry were explored. A comparison of fast atom bombardment and field desorption mass spectrometry was made to determine relative sensitivity and applicability. A series of glycosphingolipids and a series of protected oligonucleotides of …
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Bent tail radio sources as tracers of galaxy clusters at high redshift and SMBH mass estimates
… redshift of z _ 2 and finding clusters of halo mass greater than 1014 M_ at redshift greater than z = 2:5 would disprove the current concordance model. Finding galaxy clusters at those redshifts is more feasible with the new generation of radio telescopes and the upcoming square kilometer array …
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A new ion beam cooler and buncher for ISOLTRAP and mass measurements of radioactive argon isotopes
… new ion beam cooler and buncher for ISOLTRAP and mass measurements of radioactive argon isotopes - ISOLTRAP is a Penning trap mass spectrometer installed at ISOLDE/CERN. It is set up to measure the mass of short-lived nuclides with a relative accuracy delta m / m of typically 1* 10^-7. In this …
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Applications of Galactic Microlensing
… the gravitational field of intervening compact mass objects (lenses), creating multiple (however not resolvable) images of the source. Relative motion of source, observer and lens leads to a variation of deflection/magnification and thus to a time dependant observable brightness change …
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Semen quality detection using acoustic wave sensors
… QCM, aproximately 50 Hz. An average effective mass measurement was made using a QCM and gave a value of 8 ± 5 pg per sperm, which was used in conjunction with the frequency change to determine the number rate of sperm reaching the QCM.
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A sub-ppb measurement of the mass of cesium for a new determination of the fine-structure constant
… thesis describes recent single-ion Penning trap mass spectrometry measurements of the mass of atomic Cesium with a relative uncertainty of 2 x 10-10. This measurement reduces the uncertainty on the mass of Cesium by a factor of 100, and removes this uncertainty as a limitation on the accuracy of …
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Development, testing, and validation of a heat transfer model for bi-propellant liquid rocket engines
… included the addition of a fuel tank with mass measurement, venting and control valves, and fuel line sensing equipment. Upgrades were completed on the data acquisition system to incorporate additional sensors and controls. Further work was done to improve the safety of the test stand …
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