10.
Study of the Low-Energy ER/NR Discrimination and its Electric-Field Dependence with Liquid Argon
Mr
Tatsuki Washimi
(Waseda university)
22/09/2017, 09:00
ANKOK project is a dark matter search experiment in Japan using the double-phase argon detector, specialized for the low mass WIMP (~10GeV) detection. Double-phase Argon detector is generally a good technique for WIMP dark matter direct search due to powerful rejection power against electron recoil BG events. However compared with xenon, the basic properties and discrimination power from S2...
Dr
Carlos Ourivio Escobar
(FERMILAB)
22/09/2017, 09:15
After a short review of previous attempts to observe and measure the near-infrared scintillation in liquid argon, we present new results obtained with a dedicated cryostat at the Fermilab Proton Assembly Building (PAB). The new results give confidence that the near-infrared light can be used as the much needed light signal in large liquid argon time projection chambers and we present first...
Dr
Tessa Johnson
(UC Davis)
22/09/2017, 09:30
The Argon Response to Ionization and Scintillation (ARIS) experiment was constructed to characterize the response of single-scatter nuclear and electronic recoils in liquid argon for support of direct dark matter detection experiments with a liquid argon target. A 0.5 kg active volume scintillation cell of liquid argon was exposed to the highly collimated and quasi-monoenergetic LICORNE...
Dr
Roberto Santorelli
(CIEMAT Madrid)
22/09/2017, 09:45
With an active target mass of 850 kg, ArDM represents an important milestone towards developments for large LAr Dark Matter detectors. In this talk we introduce the experimental apparatus currently installed underground at the Laboratorio Subterráneo de Canfranc (LSC), Spain, presenting the results of the analysis of the first underground run. A relatively low value close to 0.5 m was found...
Ms
Elizabeth Boulton
(Lawrence Berkeley National Lab)
22/09/2017, 10:00
The Particle Identification in Xenon at Yale (PIXeY) experiment is a small, two-phase (liquid and gas) xenon detector. PIXeY has been designed and built to investigate and optimize properties of this class of detectors with an applied drift field of 0.5 to 2.0 kV/cm and an extraction field as high as 13.3 kV/cm in the xenon gas. This talk will discuss analyses of data collected from PIXeY...
Brian Lenardo
(LLNL / UC Davis)
22/09/2017, 10:15
The Large Underground Xenon (LUX) experiment is a 250kg, dual-phase xenon time projection chamber (TPC) located in the Sanford Underground Research Facility in Lead, South Dakota, USA. The experiment searches for nuclear recoils (NR) that may be caused by Weakly Interacting Massive Particles (WIMPs), a leading candidate for the dark matter content of the universe. Residual backgrounds due to...
Mr
Jingqiang Ye
(UC San Diego)
22/09/2017, 10:30
The XENON100 detector uses liquid xenon time projection chamber to search for nuclear recoils(NR) caused by hypothetical Weakly Interacting Massive Particles (WIMPs). The backgrounds are mostly electronic recoils(ER), thus it’s crucial to distinguish NR from ER. Using high statistical calibration data from tritiated methane, AmBe and other sources in XENON100, the ER/NR discrimination under...
Rex Tayloe
(Indiana University, Dept. of Physics)
22/09/2017, 11:15
Applications (dark matter, neutrino, precision frontier, medicine, etc.)
Presentation
The COHERENT collaboration is deploying a suite of low-energy detectors in a low-background corridor of the
ORNL Spallation Neutron Source (SNS) to measure coherent elastic neutrino nucleus scattering (CEvNS) on an array
of nuclear targets employing different technologies. A measurement of CEvNS on different nuclei will test the
$N^2$-dependence of the CEvNS cross section and further the...
Dr
Tomasz Biesiadzinski
(SLAC)
22/09/2017, 11:30
LZ is a next generation dark matter experiment designed to significantly extend our sensitivity to WIMP dark matter candidates. As such it presents a significant challenge to the dual-phase Xe TPC technology. A 100kg scale test platform has been constructed at SLAC in order to test multiple systems at scales approaching or comparable to LZ. The platform focuses on the high voltage performance...
Dr
Christina Ignarra
(SLAC)
22/09/2017, 12:15
Most radioactive backgrounds in liquid xenon TPCs arise from external sources and are mitigated by xenon’s self-shielding properties combined with event position reconstruction and vetoes. Background sources that instead arise from substances dissolved throughout the active region, such as krypton-85, present a distinct challenge. This talk will describe our novel system for separating...
Mr
Daniel Baxter
(Northwestern University)
22/09/2017, 12:30
Liquid noble detectors, used for dark matter and neutrinoless double beta decay searches, rely heavily on calibrations to understand each detector’s response to predicted electron recoil backgrounds. These calibrations often use beta- or gamma-decay sources to approximate all electron recoil backgrounds. Existing models assume that interaction topology does not affect detector response below...
Prof.
Wolfgang Lorenzon
(University of Michigan)
22/09/2017, 12:45
Many rare event searches including dark matter direct detection and neutrinoless double beta decay experiments take advantage of the high VUV reflective surfaces made from polytetrafluoroethylene (PTFE) reflector materials to achieve high light collection efficiency in their detectors. As the detectors have grown in size over the past decade, there has also been an increased need for ever...
Prof.
Tom Shutt
(SLAC)
22/09/2017, 14:00
Dr
Ben Jones
(UTA)
22/09/2017, 14:40
Dr
Paola Ferrario
(IFIC)
22/09/2017, 15:20
Applications (dark matter, neutrino, precision frontier, medicine, etc.)
Presentation
Liquid xenon has several attractive features, which make it suitable for applications to nuclear medicine, such as high scintillation yield and fast scintillation decay time.
In this talk, I will review the state of the art of the investigations of liquid xenon in medical imaging and I will describe the PETALO (Positron Emission Tof Apparatus with Liquid xenOn) concept, a novel idea, which...
Dr
Adriano Di Giovanni
(NYUAD)
23/09/2017, 09:00
We present the performances and characterization of an array made of S13370-3050CN (VUV4 generation) Multi-Pixel Photon Counters manufactured by Hamamatsu and equipped with a low power consumption preamplifier for operations in liquid xenon environment. The electronics is designed for the readout of a 8×8 matrix of individual photosensors and it is based on a single operational amplifier...
Dr
Gaosong Li
(Stanford University)
23/09/2017, 09:15
The nEXO collaboration is designing a 5-tonne xenon time projection chamber (TPC) using enriched Xe-136 isotope to search for neutrinoless double beta decays. Both the light and charge signals from interactions in the TPC will be collected. The light signals are planned to be detected with silicon photomultipliers (SiPMs). Comprehensive efforts have been made on SiPM performance...
Dr
Luca Pagani
(UC Davis)
23/09/2017, 09:30
The Silicon Geiger Hybrid Tube (SiGHT) is a novel photosensor designed for use in ultra low background experiments operating at low temperatures.
Thanks to an electric drift field, electrons, produced by the conversion of the incoming photons onto a hemispherical photocathode, are accelerated and focused onto a Silicon Photomultiplier which provides single stage electron multiplication....
Benjamin Godfrey
(UC Davis)
23/09/2017, 09:45
In this talk, I will present work being done at Davis to develop and utilize SensL silicon photomultiplier (SiPM) arrays. First, I will talk about the development of a UV-sensitive SiPM system suitable for deployment in noble element time projection chambers. We show that device performance is not compromised in high electric fields nor at low temperatures.
Second, I will talk about arrays...
Mr
Damian Goeldi
(University of Bern)
23/09/2017, 10:00
Liquid argon time projection chambers (LArTPCs) are ideally suited to perform long baseline neutrino experiments aiming to measure CP violation in the lepton sector, and determine the ordering of the three neutrino mass eigenstates.
LArTPCs have used projective wire readouts for charge detection since their conception in 1977.
However, wire readouts are notoriously fragile and therefore a...
Jorge Chaves
(University of Pennsylvania)
23/09/2017, 10:15
The CAPTAIN (Cryogenic Apparatus for Precision tests of Argon Interactions with Neutrinos) experiment is a five-ton liquid Argon Time Projection Chamber at Los Alamos National Laboratory. CAPTAIN is designed to make measurements of liquid argon interactions relevant to neutrino physics in particular for the proposed DUNE (Deep Underground Neutrino Experiment) underground detector. In addition...
Mr
Dev Ashish Khaitan
(University of Rochester)
23/09/2017, 11:15
Signal reconstruction and identification (analysis methods, simulations)
Presentation
In the first 10 seconds of a core collapse supernova, almost all of its progenitor's gravitational potential, O(10$^{53}$ ergs), is carried away in the form of neutrinos. These neutrinos, with O(10 MeV) kinetic energy, can interact via elastic neutrino-nucleus scattering depositing O(1 keV) in detectors. Low background dark matter detectors, such as LUX-ZEPLIN (LZ), optimized for detecting low...
Mr
Thomas McElroy
(University of Alberta)
23/09/2017, 11:30
Signal reconstruction and identification (analysis methods, simulations)
Presentation
DEAP-3600 is a Dark Matter experiment operating in SNOLAB. DEAP currently holds the leading weakly interacting massive particle (WIMP) cross-section exclusion for a LAr detector and continues to probe deeper. The expected 3-year sensitivity to the spin-independent WIMP-nucleon cross-section is $10^{−46}$ cm$^2$ at 100 GeV/c$^2$ WIMP mass. The PMT response, reflectivity of optical surfaces,...
Dr
Jason Brodsky
(LLNL)
23/09/2017, 11:45
Signal reconstruction and identification (analysis methods, simulations)
Presentation
The Noble Element Simulation Technique (NEST) software, introduced in 2011, provided a method to calculate light and ionization yields for noble element-based detectors. Since then, results from a variety of experiments have enabled improvements to NEST's underlying model. This talk introduces NEST2, a new version of NEST that implements the improved model as well as several software...
Mr
Thomas Wester
(Massachusetts Institute of Technology)
23/09/2017, 12:00
Signal reconstruction and identification (analysis methods, simulations)
Presentation
Wavelength shifting plates coated with Tetraphenyl butadiene (TPB) are used to convert vacuum ultra violet photons into visible spectrum photons in order to make detection by Photomultiplier tubes (PMTs) in liquid argon scintillator experiments possible. To accurately use the combined plate-PMT system, calibrations motivated by geometric factors and optical properties of materials must be...
Mrs
Natascha Rupp
(MPIK Heidelberg)
23/09/2017, 12:15
Signal reconstruction and identification (analysis methods, simulations)
Presentation
In many liquid xenon experiments the radioactive noble gas radon is
an important background source. It emanates continuously from the
detector materials and can reach the sensitive detection region. The
successive decays of its daughter isotopes can mimic the signals
from dark matter interactions. This talk focuses on measurement
methods to determine the radon level before detector...
Jacob Cutter
(UC Davis)
23/09/2017, 12:30
Signal reconstruction and identification (analysis methods, simulations)
Presentation
There is a particular class of unavoidable backgrounds that plague Xenon (Xe) dark matter searches: decaying daughters of the Uranium-238 nuclear decay chain, which result from Radon plate-out on detector materials. One such daughter isotope, Polonium-210, undergoes alpha decay and produces a recoiling 103 keV Pb-206 nucleus. Such nuclear recoils can emulate low-energy dark matter interactions...
Dr
Roberto Santorelli
(CIEMAT Madrid)
23/09/2017, 12:45
Signal reconstruction and identification (analysis methods, simulations)
Presentation
Given their small mobility coefficient in liquid argon, the ions spend a considerably longer time in the active volume with respect to the electrons. We studied the effects of the positive ion current in a liquid argon time projection chamber, in the context of massive argon experiment for neutrino physics. The constant recombination between free ions and electrons produce a quenching of...
Prof.
Ernesto Kemp
(University of Campinas (BR) and Fermilab)
23/09/2017, 14:00
The LArIAT experiment utilizes a Liquid Argon Time Projection Chamber (LArTPC) at the Fermilab Test Beam Facility to study the response of LArTPCs to charged particles of energies relevant for planned neutrino experiments. In addition, it will help to develop and evaluate the performance of the simulation, analysis, and reconstruction software used in other LAr neutrino experiments. Particles...
Mr
Bruno Gelli
(Universidade Estadual de Campinas - UNICAMP)
23/09/2017, 14:15
The Time Projection Chambers with noble gases are a powerful neutrino detector. The
light emitted by the scintillation process is mostly invisible to the most common light
detection systems. The vastly used solution to this problem is to use wavelength shifters
to downshift the high energy scintillation photons into less energetic ones.
Some Wavelength shifters’ characteristics are not...
Bruce Howard
(Indiana University)
23/09/2017, 14:45
As liquid argon (LAr) time-projection chamber (TPC) detectors are built to provide increased sensitivity to neutrino oscillation physics and other rare phenomena such as supernova neutrino bursts and nucleon decays, larger fiducial volumes have become necessary. While the ionization signals are detected by the TPC, the scintillation signals from LAr provide additional information about events...
Dr
Diego Garcia-Gamez
(The University of Manchester)
23/09/2017, 15:00
The SBND detector is a Liquid Argon Time Projection Chamber (LArTPC) being constructed on the Booster Neutrino Beamline at Fermilab as a part of the Short Baseline Neutrino Programme, which aims to definitely resolve the question of the existence of light sterile neutrinos. SBND's goals also include the development of liquid argon technology for future large scale detectors such as DUNE. One...
Prof.
Ernesto Kemp
(University of Campinas - UNICAMP)
23/09/2017, 15:30
The Liquid Argon Time Projection Chambers (LArTPCs) are the best choice for the next generation of large neutrino detectors due to their optimal performance in particle tracking and calorimetry. The detection of Ar scintillation light plays a crucial role in the event reconstruction as well as time reference for nonbeam physics such as supernovae neutrinos detection and baryon number violation...
Prof.
Ana Amelia Machado
(UFABC)
23/09/2017, 15:45
The X-ARAPUCA is an improvement of the concept of the original ARAPUCA device. The original idea remains the same in term of photon trapping inside an highy reflective box. The acceptance window is constituted by a dichroic window, which has the property of being highly transparent for wavelengths below a certain cutoff, while being highly reflective above it. The filter is coated with two...
Prof.
C Eric Dahl
(Northwestern University)
24/09/2017, 09:00
Applications (dark matter, neutrino, precision frontier, medicine, etc.)
Presentation
Our group at Northwestern recently demonstrated the world's first
scintillating bubble chamber, observing simultaneous scintillation and
bubble nucleation by nuclear recoils in superheated liquid xenon
(arXiv:1702.08861). These detectors already promise unmatched
background rejection in searches for canonical WIMP dark matter, and we
are beginning to explore the low-threshold (<=1 keV...
Hugh Lippincott
(Fermilab)
24/09/2017, 09:20
Next generation liquid xenon TPCs are poised to increase our sensitivity to dark matter by more than an order of magnitude over a wide range of possible dark matter candidates. In this talk I will describe an idea to expand the reach and flexibility of such detectors even further, by adding helium and neon to the xenon to enable searches for very light dark matter and combining high and low Z...
Prof.
Denver Whittington
(Syracuse University)
24/09/2017, 09:40
We report the results of an experiment which collected scintillation light induced by cosmic ray muons in xenon-doped liquid argon within the Blanche cryostat at Fermilab. Doping the liquid argon with xenon at concentrations of 7 ppm and greater resulted in a two-fold increase in the amount of scintillation photons incident on the detectors. Examination of the time-resolved scintillation...
Prof.
Andreas Ulrich
(TU-Muenchen, Physik-Department)
24/09/2017, 10:00
Electron- and ion-beam induced emission spectra of argon and argon-xenon mixtures were studied. A wide wavelength range from the vacuum ultraviolet (VUV) to the near infrared (IR) was covered (115nm – 3500nm). An intense emission at a peak wavelength of 1.173 µm has been discovered in a mixture of 10ppm xenon in liquid argon which can be of interest for detector development. The well-known 127...
Junsong Lin
24/09/2017, 10:20
Applications (dark matter, neutrino, precision frontier, medicine, etc.)
Presentation
Superfluid helium has many merits as a detector target material to probe sub-GeV dark matter, including good kinematic matching with light dark matter, excellent intrinsic radiopurity, and ability to be cooled down to milli-Kelvin temperature to enable phonon readout using transition edge sensor. At the same time, this uniform liquid may be used to make a monolithic detector. We propose to...
24/09/2017, 10:40
https://docs.google.com/presentation/d/18qWoVQ60wBvtoQnsWr8qLzTS1tl3Xd2qptwG_4SUdoU
Dr
Andrzej Szelc
(University of Manchester)
24/09/2017, 11:10
LArIAT (Liquid Argon in a Testbeam) is a small liquid argon time
projection chamber set to calibrate and develop the LArTPC technology.
LArIAT has completed 3 Runs on a charged particle beamline at the
Fermilab Test Beam Facility and has acquired a large dataset of
particle interactions on liquid argon which is currently being
analyzed. An important feature of LArIAT, is the light...
Dr
Neus López March
(IFIC)
24/09/2017, 11:25
Applications (dark matter, neutrino, precision frontier, medicine, etc.)
Presentation
The NEXT experiment seeks to discover the neutrinoless double beta decay (NLDBD) of Xe-136 using a high-pressure gas time projection chamber (TPC), filled with 100kg of enriched xenon, with electroluminesence (EL) gain and optical readout. This technology offers two features of great value in NLDBD decay searches: excellent energy resolution (<1% FWHM at the Q value of Xe-136) and event...
Mr
Carlos Henriques
(LIBPhys, Departamento de Fisica, Universidade de Coimbra, Rua Larga, 3004-516 Coimbra, Portugal)
24/09/2017, 11:55
The NEXT experiment aims at searching for the hypothetical neutrinoless double-beta decay (0νββ) of the 136Xe isotope using a High-Pressure Xenon (HPXe) Time Projection Chamber (TPC). Efficient discrimination of background events through pattern recognition of the topology of primary ionisation tracks is a major requirement for the experiment. However, the spatial resolution of the NEXT TPC is...
Christopher Benson
24/09/2017, 12:10
Applications (dark matter, neutrino, precision frontier, medicine, etc.)
Presentation
Single phase, zero field, liquid noble gas scintillator detectors are a simple, scalable and cost effective approach for dark matter and neutrino detection. The operation of MiniCLEAN, a dark matter detector currently commissioning with a liquid argon target at SNOLAB in Canada, will help inform the design of a future multi-ton experiment. The status and technical objectives of MiniCLEAN’s...
Dr
Robert Stainforth
(Carleton University)
24/09/2017, 12:25
In recent years, the interest in large liquid noble detectors, up to hundreds of tonnes in scale, has gained momentum. Such detectors would facilitate the required sensitivity for future low-background physics searches of interest such as dark-matter detection and the observation of neutrinoless double-beta decay. In order to achieve such sensitivity, R&D is essential. A new cryogenics...
