Bulletin of the American Physical Society
APS April Meeting 2022
Volume 67, Number 6
Saturday–Tuesday, April 9–12, 2022; New York
Session Q12: Instrumentation IRecordings Available
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Sponsoring Units: DNP Chair: Lauren McIntosh, Texas A&M University Room: Shubert |
Monday, April 11, 2022 10:45AM - 10:57AM |
Q12.00001: Use of isotopically enriched gas in active-target time-projection chambers Tan Ahn, Jaspreet S Randhawa, James J Kolata, Patrick D O'Malley, Javier Rufino A number of challenges are present for the use of isotopically pure gases in active-target time-projection chambers. One is the challenge of having a high purity with a limited amount of detector gas. We are developing the use of a gas recirculation system that will purify gases to a sufficient level that will allow for isotopically enriched Ne gas to be used in the active-target gas detector ND-Cube at the University of Notre Dame. The use of isotopic Ne gas will allow for the study of reactions on Ne-20 at low energies and will extend our ability to study reactions that are important for pycnonuclear reactions that are thought to contribute to heating beneath the surface of neutron star crusts. Current progress and prospects for future experiments will be presented. |
Monday, April 11, 2022 10:57AM - 11:09AM |
Q12.00002: Accelerated development of a general purpose active-pixel CMOS sensor for high-energy particle detection Aled V Cuda, Yuan Mei We developed an active pixel CMOS sensor and pixel array readout circuitry suitable for high energy particle detection, direct topmetal charge collection, and potentially other applications that currently used commodity CMOS sensors not optimized for physics use. We targeted the recently open sourced Skywater 130nm process and exclusively used open source tooling during development which means our designs, simulations, and custom tools are unencumbered by NDAs and licensing restrictions. During development we produced several pieces of software to help expedite the analog design process and scripted a large portion of the system integration. Our tools allowed us to confidently reduce the complexity of the pixels embedded charge amplifier and were able to build a 6.5x8.5um pixel, less one tenth the area of CERN's ALPIDE sensor. The reduction in complexity brought by the simplified flow and pixel also allowed the design to be completed by only 2 people in a span of around 3 months. |
Monday, April 11, 2022 11:09AM - 11:21AM |
Q12.00003: Optically pumped magnetometers and their applications in fundamental physics searches Young Jin Kim Optically pumped magnetometers (OPMs) based on lasers and alkali-metal vapor cells are currently the most sensitive cryogen-free magnetic-field sensors. Because of high sensitivity and operation in a broad frequency range, OPMs benefit many applications, including biomedical imaging and fundamental physics. In this talk, we will present the recent experiments on fundamental physics searches using OPMs at Los Alamos National Laboratory. The experiments include the detection of effective magnetic field induced by exotic interactions mediated by new fundamental bosons and oscillating magnetic field induced by the interaction between axions and magnetic fields. |
Monday, April 11, 2022 11:21AM - 11:33AM |
Q12.00004: Improving the characterization of fusion in a MuSIC detector by spatial localization. Rohit Kumar, James E Johnstone, Sylvie Hudan, Romualdo T Desouza, Jacob Allen, Dan W Bardayan, Drew Blankstein, Chevelle Boomershine, Scott R Carmichael, Adam M Clark, Sydney D Coil, Samuel L Henderson, Patrick O'Malley Multi-Sampling Ionization Chambers (MuSIC) provide an efficient means of measuring nuclear reactions with low beam rates (<106 pps). However, in comparison to thin-target measurements, prior measurements using MuSIC detectors all manifest fusion excitation functions with wide error bars in the energy dimension. This uncertainty limits the applicability of these devices in measuring near and sub-barrier fusion cross-sections. Key to overcoming this limitation is spatial localization of the fusion in the detector. By comparing the measured ionization in the MuSIC detector with accurate energy loss calculations the position of the fusion in the detector is determined. The analysis not only provides the desired improvement in energy resolution, but it also allows extraction of the atomic number of the evaporation residues following fusion. The effectiveness of this approach is demonstrated for 18O + 12C measured with MuSIC@Indiana. |
Monday, April 11, 2022 11:33AM - 11:45AM |
Q12.00005: Superconducting Quantum Sensors for sub-keV Radiation Detection with Short-Lived Rare Isotopes Kyle G Leach, Leendert Hayen Low-energy nuclear recoil spectroscopy of short-lived rare isotopes is a powerful and unique probe in our search for physics beyond the Standard Model (BSM) using beta decay. This work has been been performed to great effect using atom and ion traps over the past several years but are now reaching the limits of EM field control and particle scattering backgrounds. As a result, the exploration of new experimental paradigms is required. Recently, our community has seen specific use of low-temperature quantum sensors for BSM physics searches in rare nuclear decay (such as magnetic microcalorimeters (MMCs) and transition edge sensors (TES’)) which are characterized by their exceptionally high energy resolution (~eV) but suffer from a slow detector response thus limiting their applications in nuclear decay spectroscopy. High-resolution cryogenic-charge sensitive quantum sensors like superconducting tunnel junctions (STJs) overcome this limitation and can count at rates 2-3 orders of magnitude higher than MMCs and TES’ making them exceptionally well suited for low-energy nuclear decay measurements. In this talk, I will present the concept of SALER (the Superconducting Array for Low-Energy Radiation) to perform on-line decay measurements with STJ quantum sensors at RIB facilities. |
Monday, April 11, 2022 11:45AM - 11:57AM |
Q12.00006: AC-coupled Low Gain Avalanche Diode Sensors with Long Strip Readout Electrodes Zhenyu Ye, Shirsendu Nanda In AC-coupled Low-Gain Avalanche Diode (LGAD), signals produced by charged particles in the silicon sensor active volume are amplified via an internal p+ gain layer near the sensor surface. Signals induced on a continuous resistive n+ layer on top of the p+ gain layer, are AC coupled to patterned metal readout electrodes, which are on the sensor surface and separated by a dielectric layer from the n+ layer. The internal signal amplification and thin active volume enables precise timing measurement, while charge sharing among neighboring electrodes can provide precise position measurement. The AC-LGAD technology has been suggested to use for particle identification, tracking, and far-forward detectors at Electron Ion Collider where precision timing and spatial measurements are needed. For some of these applications, the detector material budget has to be kept at a minimum in order to minimize the multiple scattering effect. AC-LGAD sensors with long strip readout electrodes are proposed to meet these requirements. In this presentation, we will present the first measurement results on AC-LGAD sensors with long strip readout electrodes that were fabricated by Brookhaven National Laboratory. Future plan on optmizing the sensor performance will also be discussed. |
Monday, April 11, 2022 11:57AM - 12:09PM |
Q12.00007: Applications of laser-induced breakdown spectroscopy for field analysis of nuclear debris Christina L DUGAN, Ashwin Rao, Christopher Sutphin A portable laser-induced breakdown spectroscopy (LIBS) analyzer is evaluated for field analysis of nuclear debris samples for the first time. Spectra from historic test locations at the Nevada test site are analyzed for general elemental and geological characteristics. The presence of minor emission lines of elements such as Cs, Ba and Sr in recorded spectra indicate the capability of the device to detect certain products of neutron activation. Sample clustering and discrimination based on elemental signatures indicating neutron activation is conducted by applying multivariate analysis methods to the spectral data. The results of this field study indicate that portable LIBS analyzers could serve as promising tools for rapid, on-site nuclear debris analysis. |
Monday, April 11, 2022 12:09PM - 12:21PM |
Q12.00008: The Performance of INFN Made Gas Electron Multiplier (GEM) Detectors During the Neutron Magnetic Form Factor (GnM) Experiment Ezekiel Wertz The GnM experiment in Hall A, which uses the 12 GeV electron accelerator at Jefferson Lab and is the first part of the Super BigBite Spectrometer (SBS) program, measures the neutron magnetic form factor for Q2 up to 13.5 (GeV/c)2. The measurement of GnM will be extracted using the ratio of neutron-coincident to proton-coincident quasi-elastic electrons scattered off deuterium. The extraction of GnM by this ‘ratio’ method promises improved precision in the previously measured kinematic regime with projected systematic errors of the measured ratio of the cross sections varying by 2% to 5%. The experiment is performed using the BigBite Spectrometer which detects the scattered electrons, and the Super BigBite Spectrometer which detects the scattered nucleons using a large aperture dipole magnet and Hadron Calorimeter. A main component of the BigBite Spectrometer are Gas Electron Multiplier (GEM) tracking detectors. Some of which were manufactured by Istuito Nazionale di Fisica Nucleare (INFN) and were designed to handle a charged particle flux of 160 kHz/cm2. The scope of this talk will be an overview of the physics goals for the GnM experiment and a brief description of the INFN GEM detector performance during the experiment. |
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