Bulletin of the American Physical Society
APS April Meeting 2021
Volume 66, Number 5
Saturday–Tuesday, April 17–20, 2021; Virtual; Time Zone: Central Daylight Time, USA
Session L07: Advanced Topics in Detectors and InstrumentationLive
|
Hide Abstracts |
Sponsoring Units: DPF Chair: Michael Kordosky, William & Mary |
Sunday, April 18, 2021 3:45PM - 3:57PM Live |
L07.00001: The ATLAS ITk Tracking and Vertexing performance at the HL-LHC Haoran Zhao, Shih-Chieh Hsu, Ke Li The High-Luminosity LHC (HL-LHC) is expected to reach the peak instantaneous luminosity of $7.5 \times 10^{34} \rm {cm}^{-2}s^{-1}$ at a center-of-mass energy of $\sqrt{s}=$ 14 TeV. This leads to an extremely high density environment with up to 200 interactions per proton-proton bunch crossing. Under these conditions event reconstruction represents a major challenge for experiments. To meet the HL-LHC requirements, the ATLAS Phase-II Upgrade Program foresees the complete replacement of the current Inner Detector with a new all-silicon Inner Tracker (ITk). In this talk, the latest results on the expected performance of tracking and primary vertex reconstruction with the ITk will be presented. [Preview Abstract] |
Sunday, April 18, 2021 3:57PM - 4:09PM Live |
L07.00002: Measurement of Charge Transport in Large-Size Ge Detectors Made from USD-Grown Crystals Below 100 mK Pramod Acharya, Matthew Fritts, Nicholas Mast, Derek Sincavage, Zachary Williams, Michael Gardner, Vuk Mandic, Dongming Mei The main goal of this study is to understand charge transport and measure the charge collection efficiency within a SuperCDMS-style detector made from a USD-grown crystal. We use Am-241 source to observe the 59.54 keV peak in spectra from each channel~to characterize the charge collection efficiency as a function of the bias voltage. The measurements will help to understand the charge transport, charge trapping, and the charge generation processes inside the detector at mK temperature. The results will also characterize the USD crystal for whether it is reliable in making large-sized detectors. We investigate the charge breakdown and charge generation processes correlated to the impurity level. [Preview Abstract] |
Sunday, April 18, 2021 4:09PM - 4:21PM Live |
L07.00003: SiPM design optimization by TCAD simulation for the dual-readout calorimeter Bobae Kim, Jik Lee, Junghyun Lee, Sehwook Lee, Sanghyun Ko, Doyeong Kim, Jason Lee, Yunjae Lee, Jongsuk Park, Minsang Ryu, Ian Watson, Yun Eo, Seungkyu Ha, Kyuyeong Hwang, Kyungho Kim, Minsoo Kim, Sungwon Kim, Junewoo Park, Hwidong Yoo Silicon Photomultipliers (SiPMs) have been developed during recent years for various applications. Thanks to several advantages such as compactness, high gain at low operational voltage, and high detection efficiency, SiPMs are considered as photodetector of the dual-readout calorimeter which consists of scintillating and Cerenkov fibers. The dual-readout method is a novel calorimetry technique that allows the simultaneous measurement of both electromagnetic and hadronic particles in high precision. The compact size of SiPMs makes it possible to couple individual fibers in the calorimeter and the excellent position and energy resolution can be obtained for future lepton collider experiments including FCC-ee and CEPC. For high detection efficiency at the emission wavelength of both fibers and lower correlated noise, SiPM structural optimization is studied using TCAD Sentaurus before production. We present the ideal design concept, its simulation results, and plan. [Preview Abstract] |
Sunday, April 18, 2021 4:21PM - 4:33PM Live |
L07.00004: Design of keV-scale neutron sources for calibration of low threshold dark matter detectors Ryan Smith Direct detection dark matter searches are extending their reach to lower (sub-GeV) dark matter masses, requiring new detector technologies with low thresholds and new low energy calibration methods. For many detectors searching for dark matter - nucleus interactions, the ideal calibration source is a beam of monoenergetic neutrons with keV-scale energy. We will discuss recent progress in making such neutron-based calibrations practical in a university lab environment. First, we will describe a SbBe photoneutron source in which an iron filter suppresses the outgoing gamma flux with relatively little moderation of the 24 keV neutron flux. Then, we will describe a method to moderate and then filter a pulsed Deuterium-Tritium (DT) neutron generator, turning it into a pulsed keV-scale neutron source. [Preview Abstract] |
Sunday, April 18, 2021 4:33PM - 4:45PM Live |
L07.00005: New approach to determine the nucleation efficiency of nuclear recoils in superheated liquids Daniel Durnford, Marie-Cécile Piro Knowing the nucleation efficiency of low-energy nuclear recoils in superheated liquids plays a crucial role in interpreting results from direct searches for WIMP dark matter. An extensive neutron calibration campaign was performed by the PICO Collaboration over the past $6$ years with $5$ distinct neutron spectra at various thermodynamic thresholds ranging from $2.1$ to $3.9\,\mathrm{keV}$. In lieu of an adequate theoretically-motivated functional form for nucleation efficiency, a generic piecewise linear model is used, with systematic errors incorporated as nuisance parameters. A Markov Chain Monte Carlo routine is then applied to fit the nucleation efficiency model at thresholds of $2.45\,\mathrm{keV}$ and $3.29\,\mathrm{keV}$ simultaneously [C. Amole et al., Phys. Rev. D 100 (2) 022001, 2019]. After describing the fit method and results obtained, I will present the outcomes of a parametric Monte Carlo study to test the efficacy of the fit paradigm. I will demonstrate how expected WIMP interaction rates in PICO bubble chambers can be calculated - a direct input to the derivation of cross-section exclusion limits. Finally, I will discuss the application of this method to other superheated liquid experiments such as the Scintillating Bubble Chamber (SBC) project. [Preview Abstract] |
Sunday, April 18, 2021 4:45PM - 4:57PM Live |
L07.00006: Solar neutrino detection in liquid xenon via charged-current scattering to excited states Scott Haselschwardt, Brian Lenardo, Pekka Pirinen, Jouni Suhonen In this talk I discuss the prospects for real-time detection of solar neutrinos via the charged-current neutrino-nucleus scattering process in liquid xenon time projection chambers. A nuclear shell model is used to calculate the cross sections for populating specific excited states of the caesium nuclei produced by neutrino capture on $^{131}$Xe and $^{136}$Xe. The model is further used to compute the decay schemes of the low-lying $1^{+}$ excited states of $^{136}$Cs, for which there is sparse experimental data. The possibility of tagging the characteristic de-excitation $\gamma$-rays/conversion electrons using two techniques is explored: spatial separation of their energy deposits using event topology and their time separation using delayed coincidence. It is found that the topological signatures are likely to be dominated by radon backgrounds, but that a delayed coincidence signature from long-lived states predicted in $^{136}$Cs may enable background-free detection of CNO neutrino interactions in next-generation experiments. We also estimate the sensitivity for detecting the solar-temperature-induced line shift in $^{7}$Be neutrino emission, which may provide a new test of solar models. [Preview Abstract] |
Sunday, April 18, 2021 4:57PM - 5:09PM Live |
L07.00007: Neutron interaction length measurement in the ProtoDUNE Single-Phase experiment David Rivera Understanding the hadronic energy resolution will be critical for performing neutrino oscillation analyses with the Deep Underground Neutrino Experiment (DUNE). The uncertainty on the hadronic energy resolution can be subdivided into primary and secondary components, where the primary component corresponds to uncertainties from hadrons produced at the neutrino vertex and the secondary component corresponds to uncertainties from subsequent interactions of primary-component hadrons in the liquid argon volume. A large fraction of the uncertainties is driven by neutrons, which can transport energy away from their origin and can sometimes go undetected. The ProtoDUNE Single-Phase (SP) experiment at CERN captured interactions of charged particles with known incident momenta, in liquid argon, for the purpose of measuring cross sections at relevant energies for DUNE. ProtoDUNE-SP, therefore, provides a way to probe the secondary hadronic component of neutrino interactions in DUNE. This talk presents preliminary results and methods for measuring the interaction length for neutrons produced by charged hadrons in ProtoDUNE-SP data taken during the 2018 beam run. [Preview Abstract] |
Sunday, April 18, 2021 5:09PM - 5:21PM Live |
L07.00008: New Insights in Neutrino Oscillation Simulations on a Quantum Processor Pablo Castaño Basurto Neutrinos, elementary particles with no electrical charge and a very small mass, are known to come in three different flavors: electron, muon, and tau. When travelling through space and time, a neutrino with an original flavor can be later detected as a different flavored neutrino. This quantum mechanical phenomenon is known as a neutrino oscillation. To simulate this phenomenon, one must find the probability of measuring a particular flavor for an oscillating neutrino and write it as a function of time or space traversed. In this talk, I will show and explain how to do this simulation on a Quantum Computer, using logic gates that encode the neutrino mixing matrix and evolution operator. Furthermore, I will present how to perform error correction on a quantum circuit and ways to reduce the error by choosing an appropriate computational quantum basis. [Preview Abstract] |
Sunday, April 18, 2021 5:21PM - 5:33PM On Demand |
L07.00009: Controlling relaxation of nuclear spin qubit ensembles for a more sensitive search for axion-like dark matter Janos Adam, Deniz Aybas, Alexandr Gramolin, Emmy Blumenthal, Alexander O. Sushkov, Derek F. Jackson Kimball, Dmitry Budker Cosmic Axion Spin Precession Experiment (CASPEr) is a laboratory scale experiment searching for ultralight axion-like dark matter, using nuclear magnetic resonance [D. Budker, P. W. Graham, M. Ledbetter, S. Rajendran, A. O. Sushkov, Phys. Rev. X, 4,021030 (2014)]. I will describe our work on the next phase of the experiment, with the goal of searching in the kHz – MHz frequency band, using SQUID sensors. I will also describe our study of transient light-induced paramagnetic centers in ferroelectric PMN-PT ($\mathrm{(PbMg_{1/3}Nb_{2/3}O_3)_{2/3} - (PbTiO_3)_{1/3}}$) crystals. We use these paramagnetic centers to control the polarization and relaxation of the nuclear spin qubit ensemble, allowing us to improve sensitivity to axion-like dark matter. [Preview Abstract] |
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700