Conveners
DM16: Backgrounds in Dark Matter Experiments II
- Shigetaka Moriyama (ICRR, The University of Tokyo)
Mr
Matthew Stukel
(Department of Physics, Engineering Physics and Astronomy, Queen’s University, Kingston, Ontario, Canada)
9/12/19, 2:00 PM
Dark matter
Oral presentation in parallel session
The electron-capture of Potassium-$40$ ($^{40}$K) to the ground state of Argon-$40$ is a unique third-forbidden transition, whose branching ratio has never been experimentally measured. The x-ray released by this decay is a background in many rare-event searches, for instance those involving sodium-iodide scintillator detectors. KDK (potassium (K) decay (DK)) is an international collaboration...
Masashi Tanaka
(Waseda)
9/12/19, 2:20 PM
Dark matter
Oral presentation in parallel session
Liquid argon is known as an excellent target material for WIMP dark
matter direct search experiment. Relatively small atomic mass (A=40)
gives high nuclear recoil energy for WIMP-Ar nuclear scattering,
thus it potentially has high sensitivity for low mass WIMP (<10 GeV/$c^{2}$) .
There are two crucial R&D topics for the liquid argon detector to explore
such low mass WIMP signal, namely,...
Prof.
Bjoern Penning
(Brandeis University)
9/12/19, 2:40 PM
Dark matter
Oral presentation in parallel session
The LUX-ZEPLIN (LZ) dark matter experiment will consist of 7 active tonnes of liquid xenon sensitive to the nuclear recoils induced by impinging weakly interacting massive particles (WIMPs). Backgrounds to a WIMP signal tend to populate the boundaries of the LZ sensitive volume, where gamma-rays and neutrons from nearby material can enter, scatter once, and exit. The Outer Detector (OD) of LZ...
Kelly Stifter
(Stanford University)
9/12/19, 3:00 PM
Dark matter
Oral presentation in parallel session
LZ is a next generation dark matter search experiment designed to significantly extend our sensitivity to WIMP dark matter candidates. At the core of the LZ design is a dual-phase Xe time projection chamber (TPC) with a 7 ton active mass. To observe signals from low-energy nuclear recoils, including WIMP-xenon scatters, four custom-woven wire-mesh grids of 1.5m diameter establish strong...
Dr
Jon Balajthy
(UC Davis)
9/12/19, 3:20 PM
Dark matter
Oral presentation in parallel session
The LUX experiment was based on a liquid-xenon time-projection chamber that was located on the 4,850’ level of the Sanford Underground Research Facility until it was decommissioned in 2016. In total, the LUX detector contained about 370 kg of xenon, 250 kg of which was active. LUX was designed primarily to detect WIMP dark matter, and produced world-leading limits on the WIMP scattering...
