Bulletin of the American Physical Society
2018 Joint Fall Meeting of the Texas Sections of APS, AAPT and Zone 13 of the SPS
Volume 63, Number 18
Friday–Saturday, October 19–20, 2018; University of Houston, Houston, Texas
Session E01: High Energy and Particle Physics II |
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Chair: Lisa Koerner, University of Houston Room: Science and Engineering Classroom (SEC) 101 |
Friday, October 19, 2018 4:15PM - 4:39PM |
E01.00001: Status and Plan of Deep Underground Neutrino Experiment at Fermilab Invited Speaker: Jaehoon Yu High energy particle physics seeks to find the fundamental constituents of matter and understand the forces between them. To accomplish this, powerful high energy accelerators are used to probe smallest possible scale along with complex, large scale detectors. With the discovery of the Higgs particle in 2012, which has been sought for over 5 decades and the subsequent measurements of its properties getting closer and closer to that predicted by the Standard Model, it is increasingly important for the field of high energy physics to fully understand the neutrino sector which deviates from the Standard Model. The precision measurements of oscillation properties, the mass hierarchy and the CP phase measurements demand high intensity neutrino beams and large mass detectors. he Long Baseline Neutrino Facility (LBNF) and the Deep Underground Neutrino Experiment (DUNE) are the US flagship experimental facility to enable the detailed study of the neutrino sector. In addition, these will also enable expanded study beyond neutrino sector and that of the Standard Model, including search for dark matter and for super nova. In this talk, I will describe physics goals, current status and plan of DUNE, including its two large scale prototype detectors at CERN called ProtoDUNE. |
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E01.00002: Abstract Withdrawn
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Friday, October 19, 2018 4:39PM - 4:51PM |
E01.00003: Dual-Phase ProtoDUNE at CERN Daniel Koss DUNE is an experiment designed to answer questions at the forefront of neutrino physics. Located at Fermilab and SURF, the project plans to use LAr-TPCs to image neutrinos incident from an intense beam over a long baseline. The design of the LAr-TPCs will be either Single-Phase or Dual-Phase, determined by the success of their prototype’s tests at CERN. Dr. Jaehoon Yu’s HEP group at UTA is working on the Dual-Phase ProtoDUNE, bringing the project from design, through testing and construction, to near completion. This note covers the background needed to understand ProtoDUNE, the work that our group has done to build the detector, and the future of the experiment. |
Friday, October 19, 2018 4:51PM - 5:03PM |
E01.00004: Tensile Test of Fiber Reinforced Plastic Frame for DUNE Field Cage Cristobal C Garces, Marcus Pixler, Douglas T Zenger, Daniel Koss, Mathew A Rapp, Cristian C Garces, Jakob P Scantlin, Nicholas Lira, Animesh Chatterjee, Jaehoon Yu UTA’s HEP Group oversees the design and construction of the protoDUNE Dual-Phase Field Cage, which is operating at CERN. Dual-Phase LArTPC’s are one of the far detector technology options foreseen for the Deep Underground Neutrino Experiment (DUNE). The Field Cage is designed to be supported by I-Beams and is connected to the ceiling of the cryostat. The primary I-beams are required to withstand approximately 9000 Newtons. This load is concentrated on the five holes that connect the primary I-beam to the ceiling. The primary beams are critical since if they fail, the entire structure will fail as well and possibly collapse or cause discrepancies in data. Because of the importance of the primary I-beams, it is necessary to know the load that causes the I-beam to fail. A scaled model of the primary I-beam will be used in a tensile testing machine. The I-beam holes are more important than the beam itself since the load will primarily be supported at those locations. To examine the holes, fixing plates have been designed and manufactured. The plates serve to distribute the load in a uniform manner rather than on the entirety of the I-beam. The results of these tests will be very useful to both the DUNE experiment as well as for future LArTPC experiments. |
Friday, October 19, 2018 5:03PM - 5:15PM |
E01.00005: Performance of the Pilot Dual-Phase Detector for Deep Underground Neutrino Experiment Cristian C Garces, Nicholas Lira, Animesh Chatterjee, Daniel Koss, Cristobal C Garces, Douglas T Zenger, Jakob P Scantlin, Marcus Pixler, Jaehoon Yu The purpose of this paper is to understand the energy deposition of the 3x1x1 meter prototype dual-phase detector for the Deep Underground Neutrino Experiment (DUNE). I will discuss the geometry of the time projection chamber (TPC) in this paper to fully understand how the TPC performs. The process of experimenting begins when a cosmic ray particle passes through the detector ionizing the electrons in the liquid argon (LAr) as it traverses the TPC. These ionized electrons travel upwards to the LAr surface under an uniform electric field and is extracted to the gas phase. Afterwards, the charge is amplified by the large electron multipliers (LEMs) and charge is thus collected by the 2D readout plane. With this data, I will present the performance (effective gain) of the detector, and the efficiency of the extraction grid. I will further present how mechanical issues can disrupt performance of the extraction grid, LEMs, and anode readout plane. |
Friday, October 19, 2018 5:15PM - 5:27PM |
E01.00006: Creating a Strong, Uniform Electric Field for ProtoDUNE Field Cage Douglas T Zenger, Jaehoon Yu, Animesh Chatterjee, Cristobal Garces, Cristian C Garces, Mathew A Rapp, Daniel Koss, Jakob P Scantlin, Nicholas Lira, Marcus Pixler ProtoDUNE is the prototype of the Deep Underground Neutrino Experiment at Fermilab and CERN. One experiment is the Dual-Phase Field Cage consisting of both liquid and gaseous argon. The field cage consists of 98 levels of aluminum bars supported by fiber reinforced plastic. Neutrinos are detected by their interaction with electrons of the liquid argon and extracted in gaseous argon above. To direct electrons, the interior of the cage is held to a uniform electric field of 300V/cm. The uniform field is created by applying a 300kV potential at the cathode and allowing the voltage to be divided evenly across the cage. To accomplish this, a series of resistors and varistors are placed on a board and placed on the cage. Resistors are used to reduce the current and divide the voltage, and varistors protects the resistors by allowing currents to only flow at electrical surges. Quality assurance of the parts used are conducted by testing these parts individually ensuring a uniform voltage drop among each part. Rigorous testing and strict selections ensures both a uniform electric field is created, and any power supply used will not be damaged by high currents. |
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