Conveners
Session 4: Liquid and gas purification, including Rn control
- Alan Poon (Berkeley Lab)
Session 4: Liquid and gas purification, including Rn control
- Alan Poon (Berkeley Lab)
Dr
Grzegorz Zuzel
(Jagiellonian University)
5/25/17, 9:20 AM
Oral
Borexino, located at the Gran Sasso Laboratory, is a liquid scintillator detector with active mass of 278 tons. The main goal of the experiment is the real-time registration of sub-MeV solar neutrinos through their elastic scattering on electrons. The lack of directionality of the light emitted by the scintillator makes it impossible to distinguish neutrino-scattered electrons from electrons...
Mr
Stefan Bruenner
(Max-Planck Institut fuer Kernphysik)
5/25/17, 9:40 AM
Oral
The radioactive noble gas radon is an important source of internal background in many dark matter experiments based on liquid xenon. Due to emanation, $^{222}$Rn is permanently released into the detectors' liquid xenon targets. Careful material selection based on their radon emanation rate is a powerful strategy to mitigate background. In order to achieve further radon reduction, we discuss...
Dr
Eric Miller
(South Dakota School of Mines)
5/25/17, 10:00 AM
Oral
The Lux-Zeplin (LZ) dark matter detector will be a dual-phase Xe TPC with a 5.6 tonne fiducial volume located at the Sanford Underground Research Facility.
To reduce the background event rate resulting from $\beta$-decay of radon decay progeny, LZ has embarked on a comprehensive program to screen detector materials for radon emanation. We will present the status of this screening...
Dr
Henning Back
(Pacific Northwest National Laboratory)
5/25/17, 10:40 AM
Oral
There is a growing need for argon that has a lower concentration of 39Ar than that found in argon derived from the atmosphere. This isotope is the limiting background for any argon-based low-level radiation detector, such as argon dark matter detectors and low-level argon radiation detectors for environmental measurements (e.g., 39Ar age dating). In the atmosphere,...
Mr
Joseph Street
(SD Mines)
5/25/17, 11:00 AM
Oral
A potential background for the SuperCDMS SNOLAB dark matter experiment is from radon daughters that have plated out onto detector surfaces. To reach background requirements, understanding plate-out rates during detector fabrication as well as mitigating radon in surrounding air is critical. A radon mitigated cleanroom planned at SNOLAB builds upon a system commissioned at the South Dakota...
