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  Investigation of surface cleaning procedures for the removal of radon daughters from PTFE surfaces and their applicability in liquid xenon detectors.

Herrero Gómez, P. (2018). Investigation of surface cleaning procedures for the removal of radon daughters from PTFE surfaces and their applicability in liquid xenon detectors. Master Thesis, Ruprecht-Karls-Universität, Heidelberg.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0002-6DFA-B Version Permalink: https://hdl.handle.net/21.11116/0000-0002-6DFC-9
Genre: Thesis

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 Creators:
Herrero Gómez, Pablo1, Author           
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1Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society, ou_904549              

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 Abstract: Background identification and suppression is of paramount importance for experiments seeking
extremely rare events. Direct dark matter searches such as the XENON1T experiment fall in
this category. 222Rn daughters are the dominant contribution to the internal background of the
XENON1T detector. Air contains traces of radon which plates out its progeny onto the surface
of the detector materials, such as the PTFE. This polymer is in direct contact with the sensitive
liquid xenon as it is used to house the detector's dual-phase time projection chamber. The effects
of surface cleaning procedures to remove surface sources from PTFE are investigated in this work.
With a dedicated experimental setup, we investigate the efficiency of standard surface treatments
and their applicability for XENON1T and the future upgrade XENONnT.

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 Dates: 2018
 Publication Status: Accepted / In Press
 Pages: 63 S : Ill., graph. Darst.
 Publishing info: Heidelberg : Ruprecht-Karls-Universität
 Table of Contents: -
 Rev. Type: -
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 Degree: Master

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