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    Optical And Acoustical Studies Of The Proposed PICO-250L Dark Matter Detector

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    Caria_Giacomo_201411_MSc.pdf (7.140Mb)
    Date
    2014-11-20
    Author
    Caria, Giacomo
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    Abstract
    In the first part of this work I explore the possibility of using linear alkylbenzene, the buffer liquid for the future PICO-250L detector, configured as a liquid scintillator that could provide information on the background radioactivity levels of the inner vessel. I investigate what interactions could produce scintillation light and determine their intensity and likelihood. I design different devices that help light collection and assess quantitatively their advantages and disadvantages.

    In the second part of this work, I develop a 2D acoustical model of the inner vessel of the detector that reproduces the discrimination between alpha and neutron events characteristic of backgrounds in superheated liquid experiments. Such a model is crucial for understanding the propagation and reception of the acoustic signals in the chamber. Subsequently, I exploit this model to show that piezoelectric devices located in different part of the vessel yield different discrimination capability between single and multiple bubble events.
    URI for this record
    http://hdl.handle.net/1974/12620
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    • Department of Physics, Engineering Physics and Astronomy Graduate Theses
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