Dr
Sarah Lockwitz
(Fermilab)
10/14/17, 8:00 AM
Noble Liquids
Liquefied noble gases have become a technology of choice for a number of dark matter and neutrino experiments. The successful operation of such experiments relies on stable high voltage being delivered and held on a cathode surface in the liquid. New and proposed detectors are pushing the bounds of understanding and stable operation. This talk will motivate the R&D active in this area and...
Dr
Scott Hertel
(UCBerkeley)
10/14/17, 8:20 AM
Noble Liquids
We survey the many calibration methods available to liquid noble detectors. These technologies include standard external sources, beams of known energy and measured recoil angle, and radioisotopes dispersed into the liquid target itself.
Yichen Li
(Brookhaven National Laboratory)
10/14/17, 8:40 AM
Noble Liquids
Abstract—In a Liquid Argon Time Projection Chamber (LArTPC), ionization electrons drift through the induction wire planes toward the collection wire plane, current is induced on nearby wires. The induced current as a function of time is defined as the field response function. As the field response function is the first step of signal processing of a LArTPC, it is essential to establish a...
Dr
Jianjie Zhang
(Northwestern University)
10/14/17, 8:55 AM
Noble Liquids
We recently demonstrated the world’s first scintillating bubble chamber, observing simultaneous scintillation and bubble nucleation by nuclear recoils in superheated liquid xenon. No gamma induced bubble nucleation was observed above the background level down to <=1 keV threshold, establishing unmatched electron recoil rejection, orders of magnitude improvement upon the previous best...
Dr
Kirill Pushkin
(University of Michigan)
10/14/17, 9:10 AM
Noble Liquids
Terrestrial radioactive backgrounds present a continuous challenge to low background experiments. A prototype 222Rn reduction and evaluation system has been constructed where different types of charcoals were investigated to find the most efficient 222Rn adsorbing and 222Rn-free element. Average 222Rn breakthrough times and other adsorbing characteristics were studied in N2, Ar, and Xe carrier...
Dr
Sergey Pereverzev
(LLNL)
10/14/17, 9:25 AM
Noble Liquids
Noble liquid ionization and scintillation detectors have come into their own in the last decade, with increasing larger mass detectors setting new and increasingly stringent limits on popular dark matter candidates. Advances in understanding of the detector physics in these devices should make it possible to use them at the limit of their sensitivity, at the ~1-10 ionization electron level. In...