UCLA Dark Matter 2023

Session

SESSION 13: Direct detection: Technical Development-1 (CHAIR: Chamkaur Ghag - University College London)

31 Mar 2023, 15:00

PAB- 1-425 (UCLA)

211. Background Determination for the LUX-ZEPLIN Experiment

Amy Cottle

31/03/2023, 15:00

Non-directional direct dark matter detection

Talk

LUX-ZEPLIN (LZ) is a direct dark matter detection experiment, primarily designed to search for WIMPs, currently taking data. The detector comprises a position sensitive xenon time projection chamber surrounded by an instrumented xenon “Skin” and liquid scintillator active vetoes. An active mass of 7 tonnes of xenon is used, from which a fiducial region of mass 5.6 tonnes is formed that has...

222. The XENONnT Neutron Veto

Marco Selvi (INFN Bologna)

31/03/2023, 15:15

Non-directional direct dark matter detection

Talk

The Neutron Veto of the XENONnT experiment is a Gd-loaded water Cherenkov detector designed to recognise the radiogenic neutrons coming from the detector materials, in order to reduce one of the most important Nuclear Recoil backgrounds for the WIMP search in the XENONnT TPC.
The Neutron Veto is instrumented with 120 (8" Hamamatsu R5912) photomultiplier tubes, featuring high-QE and...

263. Radon mitigation strategies for current and future liquid xenon detectors

Florian Jörg (Max-Planck-Institut für Kernphysik, Heidelberg)

31/03/2023, 15:30

Non-directional direct dark matter detection

Talk

Dual-phase liquid xenon time projection chambers (TPCs) are a compelling technology for the detection of rare events such as the interaction of dark matter particles. A dominant background is induced by the radioactive noble gas ²²²Rn, which emanates from material surfaces and distributes homogeneously throughout the detection volume. This problem is usually addressed by a stringent material...

236. From Photoelectrons to Bytes in DarkSide-20k

Andrea Capra (TRIUMF (CA))

31/03/2023, 15:45

Non-directional direct dark matter detection

Talk

Darkside-20k is a planned experiment at LNGS in Italy, supported by the Global Argon Dark Matter Collaboration. Darkside-20k is a dual phase liquid argon TPC, readout by SiPM-based cryogenic photosensors and designed to perform direct detection of Weakly Interacting Massive Particles (with a mass up to the TeV$/$c$^2$ range). The 20-tonne (fiducial mass) of Argon from an underground source is...

226. First measurement of discrimination between helium and electron recoils in liquid xenon as a means for detecting sub-GeV dark matter (HydroX)

Scott Haselschwardt

31/03/2023, 16:00

Non-directional direct dark matter detection

Talk

HydroX is a proposal to improve the sensitivity of liquid xenon TPCs to O(1) GeV particle dark matter by doping a light element such as hydrogen or helium into the liquid. However, no data exist on the signal yields and discrimination for light elements recoiling in liquid xenon. This talk provides updates on the status of HydroX efforts and presents a first measurement of the discrimination...

218. Superconducting Nanowire Single Photon Detectors for Dark Matter Detection

Matthew Shaw (Jet Propulsion Laboratory)

31/03/2023, 16:15

Talk

We will discuss the latest advances in superconducting nanowire single photon detectors, which are the highest performing detectors for time-resolved single photon counting from the UV to the longwave infrared. We will discuss recent progress in scaling active area and dark counts to enable new dark matter search concepts, and recent progress in reducing the energy threshold of the detectors...