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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Characterization of Pulse–Shape Discrimination for Background Reduction in the DEAP-1 Detector

Pasuthip, PARADORN 02 February 2009 (has links)
DEAP (Dark Matter Experiment with Argon and Pulse Shape Discrimination) is an experiment that aims to directly detect dark matter particles via nuclear recoils in liquid argon. The experiment uses the scintillation property of liquid argon as a means to discriminate the γ and β backgrounds from the expected signal. DEAP-1 is a 7 kg single phase liquid argon detector. It was constructed to demonstrate the scalability for a larger (3600 kg) detector. The detector was originally operated at Queen’s University, where the background rejection level achieved was 6.3×10−8 for the recoil detection efficiency of 97.1%. The detector was relocated to SNOLAB, where the background in the energy region of interest was reduced by a factor of 7.7 (from 4.61±0.17 mHz to 0.60±0.05 mHz.). The background rejection level of 9.64×10−9 (10.4 part per billion) was achieved from the combined data set (Queen’s University and SNOLAB) for a recoil detection efficiency of 35.5 ± 1.3 %. With the current background rate, the background rejection level required for the 3600 kg detector (1.8×10−9 ) is projected to be achieved in 382 days at the neutron efficiency of 9.1±0.6 %. / Thesis (Master, Physics, Engineering Physics and Astronomy) -- Queen's University, 2009-01-26 09:28:25.432
22

The Influence of Sputtering Pressure and Film Thickness on Metal Resistivity

Xu, Can Unknown Date
No description available.
23

Investigation of argon plasma properties at high pressure

Wynn, Marvin Craig 08 1900 (has links)
No description available.
24

Non-condensable gas dynamics in the heat pipe

Zevallos, Gonzalo Efrain 08 1900 (has links)
No description available.
25

Energy resolution of a liquid argon electromagnetic calorimeter with pointing accordion geometry

Robertson, Steven Hugh 10 November 2011 (has links)
Graduate
26

A low noise lifetime measurement of electrons drifting in liquid argon

Bishop, Shawn 22 November 2011 (has links)
Graduate
27

Dielectric constants of simple gases determined using microwave cavity resonators

Royal, Damian Derek January 2000 (has links)
No description available.
28

Fundamental properties of a microwave induced argon plasma

Surrey, E. January 1987 (has links)
No description available.
29

The Influence of Sputtering Pressure and Film Thickness on Metal Resistivity

Xu, Can 06 1900 (has links)
Electrical resistivity is an important indicator of metal thin film quality. In this study, the influence of argon working pressure on the properties of metal thin films was evaluated, and the thickness effect on the resistivity of metal thin films was investigated. The sputtered thin film resistivity performances of seven metals as a function of argon pressure were measured, and the results turned out that the argon pressure was vital to film quality. Further investigation on sputtered chromium thin films using XRD, SEM and XPS revealed that the argon pressure influences the microstructure of sputtered metal thin films. Different microstructure is the reason for different resistivity performances, and John Thornton's "Zone Model" explains all these behaviours well. The resistivity of aluminum and chromium thin films with thickness from 15 to 150 nm were compared, the resistivity change significantly. The scaling trends are different for different metals. / Materials Engineering
30

An investigation of a new method for potassiumargon age determination

Barnes, Ira Lynus January 1963 (has links)
Typescript. / Thesis (Ph. D.)--University of Hawaii, 1963. / Bibliography: leaves 107-113. / viii, 114 l illus., diagrs., tables

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