Calculation and Measurement of the Rayleigh Scattering Length of the Scintillation Wavelength of Liquid Argon for Dark Matter and Neutrino Detectors. / Williams, Emily.

2018. 233 p.

Research output: ThesisDoctoral Thesis

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@phdthesis{be8cb174d660476c82c7051d30000fa8,
title = "Calculation and Measurement of the Rayleigh Scattering Length of the Scintillation Wavelength of Liquid Argon for Dark Matter and Neutrino Detectors",
abstract = "There is wealth of evidence that the majority of the matter in the universe is composed ofnon-baryonic dark matter. One candidate for dark matter is weakly interacting massiveparticle (WIMP). There are many detectors searching for evidence of WIMP particleinteraction. A common active medium is liquid argon. Argon, like all noble elements isa scintillator, meaning it produces light when exposed to radiation. Within these large,liquid argon detectors, one method of determining the signicance of the event is bydetermining the event location. This involves a deep understanding of how the scintillationlight optically propagates through the detector, including the Rayleigh scattering length.The Rayleigh scattering length of liquid argon was formerly contention, as experimentalresults did not agree with a theoretical calculation. We will discuss an update calculationof the wavelength dependent scattering in argon using historical measurements. Thesecalculations were tested using an experimental test stand, designed and constructed atRoyal Holloway. This will show that the scattering length of the scintillation light ofliquid argon is 58 cm.",
keywords = "Argon, Dark matter, Rayleigh Scattering, SCINTILLATION, Neutrinos",
author = "Emily Williams",
year = "2018",
month = dec,
day = "31",
language = "English",
school = "Royal Holloway, University of London",

}

RIS

TY - THES

T1 - Calculation and Measurement of the Rayleigh Scattering Length of the Scintillation Wavelength of Liquid Argon for Dark Matter and Neutrino Detectors

AU - Williams, Emily

PY - 2018/12/31

Y1 - 2018/12/31

N2 - There is wealth of evidence that the majority of the matter in the universe is composed ofnon-baryonic dark matter. One candidate for dark matter is weakly interacting massiveparticle (WIMP). There are many detectors searching for evidence of WIMP particleinteraction. A common active medium is liquid argon. Argon, like all noble elements isa scintillator, meaning it produces light when exposed to radiation. Within these large,liquid argon detectors, one method of determining the signicance of the event is bydetermining the event location. This involves a deep understanding of how the scintillationlight optically propagates through the detector, including the Rayleigh scattering length.The Rayleigh scattering length of liquid argon was formerly contention, as experimentalresults did not agree with a theoretical calculation. We will discuss an update calculationof the wavelength dependent scattering in argon using historical measurements. Thesecalculations were tested using an experimental test stand, designed and constructed atRoyal Holloway. This will show that the scattering length of the scintillation light ofliquid argon is 58 cm.

AB - There is wealth of evidence that the majority of the matter in the universe is composed ofnon-baryonic dark matter. One candidate for dark matter is weakly interacting massiveparticle (WIMP). There are many detectors searching for evidence of WIMP particleinteraction. A common active medium is liquid argon. Argon, like all noble elements isa scintillator, meaning it produces light when exposed to radiation. Within these large,liquid argon detectors, one method of determining the signicance of the event is bydetermining the event location. This involves a deep understanding of how the scintillationlight optically propagates through the detector, including the Rayleigh scattering length.The Rayleigh scattering length of liquid argon was formerly contention, as experimentalresults did not agree with a theoretical calculation. We will discuss an update calculationof the wavelength dependent scattering in argon using historical measurements. Thesecalculations were tested using an experimental test stand, designed and constructed atRoyal Holloway. This will show that the scattering length of the scintillation light ofliquid argon is 58 cm.

KW - Argon

KW - Dark matter

KW - Rayleigh Scattering

KW - SCINTILLATION

KW - Neutrinos

M3 - Doctoral Thesis

ER -