Speaker
Rachel Mannino
(UW Madison)
Description
The central component of the LZ (LUX-ZEPLIN) dark matter search experiment is a two-phase xenon time projection chamber (TPC) with a 7 tonne active volume currently undergoing construction at the Sanford Underground Research Facility. Four woven wire mesh grids establish the drift and electron extraction fields in the LZ detector. This talk will describe the production of these 1.5-m diameter grids and the R&D system test platform at SLAC designed to measure electron emission from grids with single electron sensitivity. Electron emission from cathodic electrodes can impact low energy dark matter searches and detector operability, so this talk will also discuss various surface treatments applied to the grids to reduce electron emission and improve the detector sensitivity.
Primary author
Rachel Mannino
(UW Madison)
