Conveners
Session 6: Liquid and Gas Purity
- Stefano Ragazzi
Prof.
Frank Calaprice
(Princeton)
19/03/2015, 14:30
Invited
Presentation
As neutrino and dark matter experiments push to higher sensitivity for detecting rare events, background from radon (Rn-222) and its progeny can present serious problems. In some cases, background decays from one or more of the progenies limit the ultimate sensitivity of the experiment. Radon is produced in the decay chain of U-238, present in the Earth's crust at ppm levels, and diffuses...
Andrea Pocar
(UMass Amherst)
19/03/2015, 14:50
Invited
Presentation
Liquid xenon detectors are at the forefront of rare event physics, including searches for neutrino-less double beta decay and WIMP dark matter. The xenon for these experiments needs to be purified from chemical impurities such as electronegative atoms and molecules, which absorb ionization electrons, and VUV (178 nm) scintillation light-absorbing chemical species. In addition, superb...
Dr
Susana Cebrian
(University of Zaragoza)
19/03/2015, 15:10
Invited
Presentation
The “Neutrino Experiment with a Xenon TPC” (NEXT), intended to investigate neutrinoless double beta decay using a high-pressure xenon gas TPC filled with Xe enriched in 136Xe at the Canfranc Underground Laboratory (LSC, Laboratorio Subterráneo de Canfranc) in Spain, requires ultra-low background conditions demanding an exhaustive control of material radiopurity and environmental radon levels....
Mr
Brian Lenardo
(Lawrence Livermore National Laboratory)
19/03/2015, 15:30
Contributed
Presentation
Direct searches for dark matter require ultra-low-radioactivity techniques. In recent years, such experiments using noble liquids (especially liquid xenon) have obtained the lowest background levels in the field. Along with the development of this technology, there has been a continued effort in the community to better understand the detailed scintillation and ionization responses of noble...
Dr
Vitaly Kudryavtsev
(University of Sheffield)
19/03/2015, 15:50
Contributed
Presentation
The LZ experiment, featuring a 7-tonne active liquid xenon target, is aimed at achieving unprecedented sensitivity to WIMPs where the background in the nuclear recoil band is expected to be dominated by neutrinos. To reach this goal, extensive simulations are carried out to accurately calculate the electron recoil and nuclear recoil rates in LZ. Both internal and external backgrounds are...
