Bulletin of the American Physical Society
2020 Fall Meeting of the APS Division of Nuclear Physics
Volume 65, Number 12
Thursday–Sunday, October 29–November 1 2020; Time Zone: Central Time, USA
Session LK: Mini-Symposium: Novel detector Technologies, from detectors to data analysis I |
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Chair: Edward Brash, CNU |
Saturday, October 31, 2020 10:30AM - 11:06AM |
LK.00001: CLAS12 Detector and Data Processing Overview Invited Speaker: Veronique Ziegler The CLAS12 experiment at the Jefferson Laboratory has begun the physics data taking in February 2018. I will discuss the overall performance of the detector and describe event reconstruction including charged and neutral particle identification. A general overview of data processing and analyses schemes will be presented. [Preview Abstract] |
Saturday, October 31, 2020 11:06AM - 11:18AM |
LK.00002: Characterization of High-Purity Germanium Detectors with Amorphous Germanium Contacts in Cryogenic Liquids Rajendra Panth, Jing Liu, Iris Abt, Xiang Liu, Oliver Schulz, Wenzhao Wei, Hao Mei, Guojian Wang, Dongming Mei For the first time, planar high-purity germanium detectors with thin amorphous germanium contacts were successfully operated directly in liquid nitrogen and liquid argon in a cryostat at the Max-Planck-Institut für Physics in Munich. The detectors were fabricated at the Lawrence Berkeley National Laboratory and the University of South Dakota, using crystals grown at the University of South Dakota. They survived long-distance transportation and multiple thermal cycles in both cryogenic liquids and showed reasonable leakage currents and spectroscopic performance. Also discussed are the pros and cons of using thin amorphous semiconductor materials as an alternative contact technology in large-scale germanium experiments searching for physics beyond the Standard Model. [Preview Abstract] |
Saturday, October 31, 2020 11:18AM - 11:30AM |
LK.00003: New opportunities in heavy ion physics at HL-LHC with a MIP Timing Detector at the CMS experiment Andre Stahl The Compact Muon Solenoid (CMS) detector at the CERN Large Hadron Collider (LHC) is undergoing an extensive Phase II upgrade program to prepare for the challenging conditions of the High-Luminosity LHC (HL-LHC). A new timing layer is designed to measure minimum ionizing particles (MIPs) with a hermetic coverage up to a pseudo-rapidity of $|\eta|$=3. This MIP Timing Detector (MTD) will comprise a central barrel section based on LYSO:Ce crystals read out with SiPMs and two end-cap discs instrumented with radiation-tolerant Low Gain Avalanche Detectors (LGADs), reaching a time resolution of ~30 ps. The precision time information from the MTD will serve as an excellent time-of-flight detector for particle identification in QCD and heavy-ion physics. Together with the wide coverage of tracker and calorimetry, the MTD will enable a broad range of new and unique opportunities in heavy-ion physics at CMS. We present the current status and ongoing R&D of the MTD and performance of extending heavy-ion physics program at CMS with particle identification, as well as possible applications of LGAD technology for timing measurements for the future Electron Ion Collider. [Preview Abstract] |
Saturday, October 31, 2020 11:30AM - 11:42AM |
LK.00004: Progress Towards a Single Atom Microscope for Nuclear Astrophysics Erin White, Jaideep Singh, Ben Loseth, Eric Delgado, Jordan O'Kronley, Joseph Noonan, Payton Walton, Roy Ready, Gordan Arrowsmith-Kron For nuclear astrophysics applications, the Single Atom Microscope (SAM) project sets out to measure certain rare, low-yield nuclear reactions more precisely than any other current method by capturing the product atoms in a cryogenically frozen noble gas solid. The product atoms embedded in the transparent solid could then be counted with single atom sensitivity through the utilization of laser-induced fluorescence and optical imaging. Due to the unique absorption and emission wavelengths of the product---enabled by the lattice of noble gas atoms---optical filters can distinguish between them to select the wavelength range of interest, making single-atom sensitivity viable. Making this possibility a reality is the current primary goal of the project. Once achieved, this technique would have the required efficiency, selectivity, and sensitivity to measure nuclear reactions in a way that is complementary to other methods. We will describe the prototype Single Atom Microscope's (pSAM) design and performance during beamline testing with Rb and Kr ion beams completed at the ReA3 facility in the National Superconducting Cyclotron Lab at Michigan State University. [Preview Abstract] |
Saturday, October 31, 2020 11:42AM - 11:54AM |
LK.00005: Development of Capacitively Coupled LAPPD$^{\mathrm{TM\thinspace \thinspace }}$MCP-PMT$^{\mathrm{\thinspace \thinspace }}$For Nuclear Physics Experiments Michael Foley, M. Aviles, S. Butler, T. Cremer, C. Ertley, C. Hamel, A. Lyashenko, M. Minot, M. Popecki, M. Stochaj, T. Rivera, E. Angelico, H. Frisch, A. Elagin, E. Spieglan, B, Adams Incom Inc is producing a capacitively coupled version of the Large Area Picosecond Photo-Detector (LAPPD). It is the largest commercially-available MCP-PMT, with a 350 cm2 active planar area. The LAPPD features an internal ground plane capacitively coupled to an external pixelated signal board. Pixelation can improve photon detection of in high rate environments and of Cherenkov light. Patterns are easily changed by the customer. These devices show electron gains of 10E7, low dark noise rates (15-30 Hz/cm2), SPE temporal resolution of 71 picoseconds RMS, single photoelectron spatial resolution of 2.8 mm RMS, uniform photocathodes with QE \textasciitilde 28{\%}, and low sensitivity to magnetic fields. Examples will be shown for a variety of signal board patterns down to 3 mm in size. LAPPDs can be employed in particle collider experiments (e.g. SoLID, future EIC), neutrinoless double-beta decay experiments (e.g. THEIA), neutrino experiments (e.g. ANNIE, WATCHMAN) and medical (PET). [Preview Abstract] |
Saturday, October 31, 2020 11:54AM - 12:06PM |
LK.00006: Machine learning applications for Ortho-Positronium tagging in liquid scintillator for the PROSPECT experiment Blaine Heffron, Diego Venegas Vargas PROSPECT is an above-ground detector for reactor antineutrinos, identified via the inverse beta decay (IBD) interaction.The IBD process provides a unique space-time correlated signal pair consisting of a positron energy deposition and a delayed neutron capture in the liquid scintillator (LS). The correlation between prompt and delayed pulses/signals provides an excellent handle for background suppression. We investigate a way to further recude the background further by tagging a subset of positrons, which are hard to distinguish from electrons by their interaction in LS. Before a pair annihilation takes place, there exists the possibility of a positron and an electron forming a bound state known as Positronium. Formation of an Ortho-Positronium (o-Ps) state, the spin-triplet state of Positronium, will introduce a delay in the photon emission time distribution of the prompt signal, thus providing a tool to discriminate between pair annihilation and o-Ps decay events. We present a summary of the machine learning techniques applied along with preliminary results regarding our ability to discriminate o-Ps decay events. [Preview Abstract] |
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