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 D20: Calorimeter R&DLive
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Sponsoring Units: DPF Chair: Roger Rusack, University of Minnesota |
Saturday, April 17, 2021 1:30PM - 1:42PM Live |
D20.00001: Development of a Detector Prototype for future High Energy Gamma Ray Experiments Brandon Weindorf, Aeowyn Kendall, Al Mokris, Abaz Kryemadhi, Matthew Farrar Development of instruments capable of detecting gamma rays across vast ranges of energies is important for understanding different astrophysical objects. Instruments are constrained by cost, power, autonomous operation and sensitivity over wide range of energies. Photomultiplier tubes have been the main photon detection technology for these experiments because they can be manufactured in large sizes hence higher light yields. The drawbacks of these devices is their higher voltage of operation, bulky size, and a limited number of vendors producing them. Silicon photomultipliers (SiPMs) are the solid-state equivalents which operate at lower voltage and there is an increase in the number of vendors producing them. The main drawbacks of SiPMs is their small surface area and higher dark rate. In order to circumvent their small area we have constructed a Cherenkov detector prototype with wavelength shifters (WLS) in combination with SiPMs to increase light collection efficiency and report on the detector performance. [Preview Abstract] |
Saturday, April 17, 2021 1:42PM - 1:54PM Live |
D20.00002: Measurement of Proton Quenching in a Plastic Scintillator Detector Shengchao Li The non-linear energy response of the plastic scintillator EJ-260 is measured with the MicroCHANDLER detector, using neutron beams of energy 5 to 27 MeV at the Triangle Universities Nuclear Laboratory. The first and second order Birks' constants are extracted from the data, and found to be $k_B = (8.70 \pm 0.93)\times 10^{-3}\ {\rm g/cm^2/MeV}$ and $k_C = (1.42 \pm 1.00) \times 10^{-5}\ {\rm (g/cm^2/MeV)^2}$. This result covers a unique energy range that is of direct relevance for fast neutron backgrounds in reactor inverse beta decay detectors. These measurements will improve the energy non-linearity modeling of plastic scintillator detectors. In particular, the updated energy response model will lead to an improvement of fast neutron modeling for detectors based on the CHANDLER reactor neutrino detector technology. [Preview Abstract] |
Saturday, April 17, 2021 1:54PM - 2:06PM Live |
D20.00003: The Simulation of the Dual-readout Calorimeter for Future Collider Experiments Using Key4HEP Common Software Stack Sanghyun Ko, Yun Eo, Seungkyu Ha, Kyuyeong Hwang, Bobae Kim, Doyeong Kim, Kyungho Kim, Minsoo Kim, Sungwon Kim, Jason Lee, Junghyun Lee, Sehwook Lee, Yunjae Lee, Jongsuk Park, Junewoo Park, Minsang Ryu, Ian Watson, Hwidong Yoo The Key4HEP is a common software framework proposed and developed by software experts of all future HEP experiments, including ILC, CLIC, CEPC and FCC. It provides software stacks which can be commonly used for various physics and detector studies on top of LCG releases. The dual-readout calorimeter has also been migrating from standalone GEANT4 toolkit to Key4HEP framework, making room for collaboration with wider communities. We present recent activities on the simulation of the dual-readout calorimeter using Key4HEP and plan for its application to various physics and detector study topics. [Preview Abstract] |
Saturday, April 17, 2021 2:06PM - 2:18PM Live |
D20.00004: Simulation study on energy and position resolutions with 4pi dual-readout calorimeter Kyuyeong Hwang, Bobae Kim, Junghyun Lee, Sehwook Lee, Sanghyun Ko, Doyoung Kim, Jason Lee, Yunjae Lee, Jongsuk Park, Minsang Ryu, Ian Watson, Yun Eo, Seungkyu Ha, Kyungho Kim, Minsoo Kim, Sungwon Kim, Junewoo Park, Hwidong Yoo The dual-readout calorimeter(DRC), which is one of the candidates for the FCC-ee and CEPC projects, is composed with two different types of fibers: scintillating and Cerenkov fibers. They offer high-quality energy resolution by compensating hadron shower energy based on its electromagnetic shower fraction. The DRC modules, packed with dense arrays of fibers, compose projective structure. This high-precision and high-granularity design allows good separation for the position and angular distributions in an efficient way. This presentation will discuss the energy resolution of the electromagnetic and hadronic particles (including jets) and the position and angular resolutions in the basis of the simulation carried out using GEANT4. [Preview Abstract] |
Saturday, April 17, 2021 2:18PM - 2:30PM Live |
D20.00005: Toward First Test Beam With Dual-readout Calorimeter R&D for Future E+E- Collider Seungkyu Ha, Bobae Kim, Junghyun Lee, Sehwook Lee, Sanghyun Ko, Doyeong Kim, Jason Lee, Yunjae Lee, Jongsuk Park, Minsang Ryu, Ian Watson, Yun Eo, Kyuyeong Hwang, Kyungho Kim, Minsoo Kim, Sungwon Kim, Junewoo Park, Hwidong Yoo Calorimeter has been the sprit of modern high energy physics experiments since they provide four-vector of both neutral and charged particles. Future lepton collider experiments (FCC-ee and CEPC) are proposed for the higgs factory to understand the origin of mass and its relation to the Higgs mechanism. High-quality energy measurement for these experiment is imperative to study couplings between Higgs and all decay products. The dual-readout calorimeter is regarded as a good option to satisfy this requirement. KFC DREAM (Korea Future Collider Dual-REAdout Method) is supposed to have the “test beam” with two prototype modules of dual-readout (DR) calorimeter with pions and protons from SPS at CERN in the end of 2021. We have two goals of the test beam, the first one is to measure the length of the nuclear interaction between pion and proton. The other is to obtain the resolution (energy, position and time) of the prototype DR calorimeter. In this talk, we will present the plan and status for test beam. [Preview Abstract] |
Saturday, April 17, 2021 2:30PM - 2:42PM Live |
D20.00006: Scintillation yield from electronic and nuclear recoils in superfluid $^4$He Andreas Biekert Superfluid $^4$He is a promising target material for direct detection of light ($<$ 1 GeV) dark matter. Possible signal channels available for readout in such a detector include prompt photons, triplet excimers, and roton and phonon quasiparticles, but the relative strength of these signals has until now not been studied for low energy nuclear recoils. We have measured the superfluid $^4$He scintillation yield from electronic and nuclear recoils in the range of 50-1100 keV using a 16 cm$^3$ volume of superfluid $^4$He read out by six PMTs immersed in the superfluid. 2.8 MeV neutrons generated by a deuterium-deuterium neutron generator were used to determine the scintillation signal yield for a variety of nuclear recoil energies by tagging elastic scatters in the helium target with a liquid organic scintillator module. For comparison, 662 keV $^{137}$Cs gamma ray Compton scatters tagged by NaI scintillators were used to determine the scintillation signal yield of electronic recoils. Yields of both prompt and delayed scintillation components were measured. [Preview Abstract] |
Saturday, April 17, 2021 2:42PM - 2:54PM Live |
D20.00007: Application of recoil-imaging time projection chambers to directional neutron background measurements at SuperKEKB Jeffrey Schueler Modern gas time projection chambers (TPCs) with high readout segmentation are capable of reconstructing detailed 3D ionization distributions of nuclear recoils resulting from neutron-nucleus scattering. This provides event-by-event recoil direction and ionization energy, as well as high-quality particle identification; which together enable unique, low-background directional neutron measurements. We report on the first directional measurements of beam-induced neutron backgrounds in the SuperKEKB $e^+e^-$ accelerator tunnel, using a system of six compact gas TPCs with pixel ASIC readout. By rejecting large backgrounds of electron-recoils in these TPCs, we obtain high purity energy spectra and directional distributions of nuclear recoils, which are ultimately used to provide first experimental evidence toward a localized neutron production hotspot near the Belle II detector. This hotspot is predicted to produce the majority of neutrons originating outside of the Belle II detector, making it an important region to monitor and potentially shield in the future. In addition to the applications demonstrated here, recoil-imaging detectors are also of interest for future directional dark matter and neutrino experiments. [Preview Abstract] |
Saturday, April 17, 2021 2:54PM - 3:06PM Live |
D20.00008: Improving the Ionization Response of Two-Phase Argon Detectors by the Addition of Xenon Ethan Bernard Argon is kinetically advantaged relative to xenon in the detection of nuclear recoils from light WIMP dark matter and coherent elastic neutrino-nucleus scattering (CENNS). Two-phase xenon detectors can now resolve single ionization electrons, and their nuclear recoils yield 1.1 electrons at 300 eV. The analogous low-energy ionization signal of two-phase argon detectors is frustrated by the 128 nm argon electroluminescence light, which is released over microseconds and sensed indirectly through the fluorescence of wavelength-shifting materials. Adding xenon to a two-phase argon detector will shift the electroluminescence light to 147 nm and hasten its release, allowing for direct detection by SiPMs. Xenon undergoes Penning ionization in liquid argon, and this may raise the charge yield of mixtures relative to pure argon. These advances will improve the response of argon-based detectors of light WIMP dark matter and open opportunities in neutrino physics through the CENNS channel. This talk surveys the impact that xenon-doped argon will have on dark matter detection, reactor fuel-cycle monitoring, and searches for new neutrino physics. [Preview Abstract] |
Saturday, April 17, 2021 3:06PM - 3:18PM On Demand |
D20.00009: Development of Planar P-type Point Contact Germanium Detectors for Low-Mass Dark Matter Searches Wenzhao Wei, Hao Mei, Kyler Kooi, Dongming Mei, Jing Liu, Jianchen Li, Rajendra Panth, Guojian Wang The detection of low-energy deposition in the range of sub-eV through ionization using germanium (Ge) with a bandgap of about 0.7 eV requires internal amplification of charge signal. This can be achieved through high electric field which accelerates charge carriers to generate more charge carriers. The minimum electric field required to generate internal charge amplification is derived for different temperatures. A point contact Ge detector provides extremely high electric field in proximity to the point contact. We show the development of a planar point-contact detector and its performance. The field distribution is calculated for this planar point contact detector. We demonstrate the required electric field can be achieved with a point contact detector. [Preview Abstract] |
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