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Weak Interaction Discussion Group (WIDG)
Weak Interaction Discussion Group (WIDG) Seminar: Elizabeth Boulton, Yale University, “Understanding two-phase LXe TPCs and Utilizing them for Detection of Special Nuclear Material”
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US/Eastern
WLC 108
WLC 108
Description
Two-phase liquid xenon time projection chambers have been a very important tool in the search for direct detection of dark matter. However, there are still many aspects of these detectors that needs to be better understood. To this end, the Particle Identification in Xenon at Yale (PIXeY) experiment is a R&D detector that has been used to investigate the extraction efficiency, electron and nuclear recoil discrimination, and energy resolution in these TPCs. Furthermore, we produced an 37Ar source and injected it into PIXeY. This novel calibration source is very important for understanding and calibrating LXe TPCs to a sub-keV scale, which is a key energy range for dark matter searches. Currently, an upgraded version of PIXeY is being assembled as a Compton gamma-ray imager. This detector will utilize a wire read-out board for position reconstruction and will be able to reconstruct the Compton scattering angle. The end goal is to use this type of LXe TPCs to detect special nuclear material. This talk will cover the principles of two-phase LXe TPCs, the interesting data we have gathered from PIXeY, and an update on the current status of PIXeY Compton Imager.
