Author: Julien WulfPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Direct Dark Matter Search with XENON1T and Developments for Multi-ton Liquid Xenon Detectors
Author: Julien WulfLiquid-phase Purification for Multi-ton Xenon Detectors and a Search for Dark Matter and Neutrinos in XENON1T
Author: Joseph HowlettPublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
This thesis describes research I conducted within the XENON program of dark matter searches. In particular, I focus on contributions I made to the development of a novel system for purifying liquid xenon employed in XENONnT, to the reconstruction and modeling of electronic and nuclear recoil signals by fitting calibration data, and in the employment of these tools to world-leading physics searches for spin-dependent DM-nucleus scattering and coherent neutrino-nucleus scattering from boron-8 solar neutrinos.
Direct Search for Dark Matter by Using Dual-phase Liquid Xenon Detector and Measurement of Nuclear Recoils in Liquid Argon
Author: Yixiong MengPublisher:
ISBN:
Category :
Languages : en
Pages : 217
Book Description
Cosmological and Astrophysical observations provide compelling evidences for the existence of dark matter in the universe. One class of dark matter candidates, the Weakly Interacting Massive Particles (WIMPs), has been predicted in many particle physics theories. Direct detection experiments using dual- phase liquid noble element detectors report the best sensitivities to the detection of the dark matter particles. The next generation direct detection experiments using the same technology, are actively been built and expected to give a factor of 100 improvement on the current best sensitivity. This thesis discusses the measurement of nuclear recoils in a dual-phase liquid argon detector using a bunched neutron beam generated by linear accelerator facility at accelerator laboratory in Notre Dame University. Nuclear recoils of en- ergy ranging from 10.8 keVnr to 49.9 keVnr are measured under different drift field configurations. An electric field quenching on nuclear recoils in liquid argon is dis- covered and quantified for the first time. This quenching effect is also found to be drift field and recoil energy dependent. By varying the drift field amplitude from 100 V/cm to 1000 V/cm for each nuclear recoil energy, the quenching effect are measured as a function of nuclear recoil energy and drift field amplitude. Results from this measurement is used in the direct dark matter detection experiment to calculate the final sensitivity of direct dark matter search. A separate work on the optimization of detector design for the XENON1T detector is also discussed in detail. Finite element simulation tool is used to design and optimize the electric field in XENON1T time projection chamber. As part of the design of XENON1T detector, electron transparency across metal grids of different geometrical configurations are also studied.
Understanding Low-Energy Nuclear Recoils in Liquid Xenon for Dark Matter Searches and the First Results of XENON1T
Author: Matthew AnthonyPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
An abundance of cosmological evidence suggests that cold dark matter exists and makes up 83% of the matter in the universe. At the same time, this dark matter has eluded direct detection and its identity remains a mystery. Many large international collaborations are actively searching for dark matter through its potential annihilation in high-density regions of the universe, its creation in particle accelerators, and its interaction with Standard Model particles in low-background detectors. One of the most promising dark matter candidates is the weakly interacting massive particle (WIMP) which falls naturally out of extensions of the Standard Model. A variety of detectors have been employed in the search for WIMPs, which are expected to scatter with atomic nuclei, yet none have been more successful than dual-phase liquid xenon time projection chambers (TPCs). The first ton-scale liquid xenon TPC, XENON1T, began operating in 2016 and with only 34.2 days of data has set the most strict limits on the WIMP-nucleon interaction cross sections for WIMP masses above 10 GeV/c^2, with a minimum of 7.7 × 10−47 cm^2 for 35 GeV/c^2 WIMPs.
The XENON1T Spin-Independent WIMP Dark Matter Search Results and a Model to Characterize the Reduction of Electronegative Impurities in Its 3.2 Tonne Liquid Xenon Detector
Author: Zachary GreenePublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
XENON1T is the first tonne-scale TPC, and with 278.8 days of dark matter data has set the strictest limits on WIMP-nucleon interaction cross sections above WIMP masses of 6 GeV/c^2, with a minimum of 4.1 x10^{-47} cm^2 at 30 GeV/c^2. XENON1T and the analysis that led to this result are discussed, with an emphasis on electronic and nuclear recoil calibration fits, which help discriminate between background and WIMP-like events. Interactions in liquid xenon produce light and charge that are measured in TPCs. These signals are attenuated by electronegative impurities including O_2 and H_2O, which are homogeneously distributed throughout the liquid xenon. The decrease in observables enlarges the uncertainty in our analysis, and can decrease our sensitivity. Methods on measuring the charge loss are presented, and a physics model that describes the behavior of the electronegative impurity concentration over the lifetime of XENON1T is derived. The model is shown to successfully explain the more than two years of data.
Technique And Application Of Xenon Detectors, Proceedings Of The International Workshop
Author: Yusuke KoshioPublisher: World Scientific
ISBN: 9814487376
Category : Science
Languages : en
Pages : 211
Book Description
Contents:The Basic Properties of Liquid Xenon as Related to Its Application in Radiation Detectors (W F Schmidt)Non-Proportionality of the Scintillation Yield in Liquid Xenon and Its Effect on the Energy Resolution for Gamma-Rays (T Doke)Development of Liquid Xenon Detectors for Medical Imaging (V Chepel)The DAMA Pure Liquid Xenon Experiment (R Bernabei)DRIFT: A Dark Matter Detector with Directional Sensitivity (B Morgan)Studies of Barium Ion Mobility in Liquid Xenon (M Miyajima)XENON: A 1-Tonne Liquid Xenon Experiment for a Sensitive Dark Matter Search (E Aprile)Progress on the Enriched Xenon Observatory Double-Beta Decay Experiment (S Waldman)and other papers Readership: Researchers in high energy physics. Keywords:Low Energy Solar Neutrinos;Dark Matter;Double Beta Decay;Liquid Xenon;Gamma-Ray Astronomy;Radiation Detectors
From XENON100 to XENON1T: Direct Dark Matter Searches with Dual Phase Liquid Xenon Time Projection Chambers
Author: Lukas BütikoferDevelopment of a Liquid Xenon Detector for Use in Dark Matter Searches
Author: XAMS
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 154
Book Description
"One of the most promising detector technologies to directly detect weakly interacting massive particle (WIMP) dark matter are time projection chambers (TPCs) filled with dual-phase (liquid and gaseous) xenon. The hypothetical WIMP could scatter with atoms in the liquid and the transferred recoil energy would lead to a prompt light signal (S1) and, after a drift time of ionisation electrons into the gas phase, to a secondary signal (S2). Only a detection of a dark matter particle interaction can provide evidence beyond doubt for its existence and could potentially solve a puzzle that combines astroparticle physics and cosmology. To date, even the most sensitive detectors (filled with more than 100 kg of liquid xenon) could not produce indisputable proof of dark matter. In order to improve the sensitivity of future dual-phase xenon TPCs this thesis investigated the GridPix detector as an alternative for the detection of the S2 signal. Unlike the typically used photomultiplier tubes, GridPix offers a lower radioactive content. This could reduce the intrinsic background of the TPC, hence making it more sensitive to small energy deposits. However, the studies showed that GridPix does not operate stably enough at the challenging conditions of high-purity, low-temperature gas. To test other detector technologies as well as to study xenon properties and data acquisition techniques, a small-scale dual-phase xenon TPC was built and commissioned at Nikhef: XAMS, a xenon facility at Amsterdam. Calibration measurements showed the basic functioning of the TPC and led to improvements that make XAMS a valuable testing ground for future dark matter search experiments."--Samenvatting auteur.
Solar Reflected Dark Matter with XENON1T and XENONnT
Author: Pueh Leng TanPublisher:
ISBN: 9789180147965
Category :
Languages : en
Pages : 0
Book Description