Speaker
Description
Dual-phase xenon time projection chambers (TPCs) are a leading technology for direct dark matter detection. They rely on prompt scintillation in the liquid phase and electroluminescence from electrons extracted into a gaseous amplification region to reconstruct particle interactions. Precise, unbiased measurements of these signals are essential for improving xenon response models and reducing systematic uncertainties in future searches. This talk presents new measurements of scintillation and electroluminescence spectra in a dual-phase xenon TPC — the first measurements of both signals in a single setup under equilibrium conditions. The measurements reveal a ~4 nm shift between the peak wavelength of the two signals and a modest yet visible difference in wavelength between the singlet and triplet emission in the liquid phase.