A5045318777- Astrophysics and Cosmic Phenomena
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Radio Astronomy Observations and Technology
- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- Gamma-ray bursts and supernovae
- Pulsars and Gravitational Waves Research
- Radiation Detection and Scintillator Technologies
- High-Energy Particle Collisions Research
- Particle accelerators and beam dynamics
- Radio Wave Propagation Studies
- Nuclear Physics and Applications
- Cryospheric studies and observations
- Solar and Space Plasma Dynamics
- Computational Physics and Python Applications
- CCD and CMOS Imaging Sensors
- Ionosphere and magnetosphere dynamics
- Gyrotron and Vacuum Electronics Research
- Scientific Research and Discoveries
- Atmospheric Ozone and Climate
- Analog and Mixed-Signal Circuit Design
- Precipitation Measurement and Analysis
- Electron and X-Ray Spectroscopy Techniques
- Advanced Electron Microscopy Techniques and Applications
Lawrence Berkeley National Laboratory
2015-2024
The University of Texas at Arlington
2018-2024
Clark Atlanta University
2012-2024
Southern University and Agricultural and Mechanical College
2006-2024
University of Alaska Anchorage
2008-2024
Providence College
2008-2024
University of Wisconsin–Madison
2011-2023
UCLouvain
2023
TU Dortmund University
2023
Tufts University
2023
Abstract We describe the development, operation, and application of 4D Camera—a 576 by pixel active sensor for scanning/transmission electron microscopy which operates at 87,000 Hz. The detector generates data ∼480 Gbit/s is captured dedicated receiver computers with a parallelized software infrastructure that has been implemented to process resulting 10–700 Gigabyte-sized raw datasets. back illuminated provides ability detect single events accelerating voltages from 30 300 kV. Through...
We report on the development, installation, and operation of first three seven stations deployed at ARIANNA site's pilot Hexagonal Radio Array (HRA) in Antarctica. The primary goal project is to observe ultrahigh energy ( > 100 PeV) cosmogenic neutrino signatures using a large array autonomous stations, each 1 km apart surface Ross Ice Shelf. Sensing radio emissions MHz GHz, station contains RF antennas, amplifiers, 1.92 G-sample/s, 850 bandwidth signal acquisition circuitry,...
Author(s): Ciston, Jim; Johnson, Ian J; Draney, Brent R; Ercius, Peter; Fong, Erin; Goldschmidt, Azriel; Joseph, John M; Lee, Jason Mueller, Alexander; Ophus, Colin; Selvarajan, Ashwin; Skinner, David E; Stezelberger, Thorsten; Tindall, Craig S; Minor, Andrew Denes, Peter
Author(s): Ercius, Peter; Johnson, Ian; Brown, Hamish; Pelz, Philipp; Hsu, Shang-Lin; Draney, Brent; Fong, Erin; Goldschmidt, Azriel; Joseph, John; Lee, Jason; Ciston, Jim; Ophus, Colin; Scott, Mary; Selvarajan, Ashwin; Paul, David; Skinner, Hanwell, Marcus; Harris, Chris; Avery, Patrick; Stezelberger, Thorsten; Tindall, Craig; Ramesh, Ramamoorthy; Minor, Andrew; Denes, Peter
Abstract Radio-glaciological parameters from the Moore’s Bay region of Ross Ice Shelf, Antarctica, have been measured. The thickness ice shelf in was measured reflection times radio-frequency pulses propagating vertically through and reflecting ocean, is found to be 576 ± 8 m. Introducing a baseline 543 7m between radio transmitter receiver allowed computation basal coefficient, R , separately englacial loss. depth-averaged attenuation length column, 〈 L 〉 shown depend linearly on frequency....
We report on the development, installation and operation of first three seven stations deployed at ARIANNA site's pilot Hexagonal Radio Array in Antarctica. The primary goal project is to observe ultra-high energy (>100 PeV) cosmogenic neutrino signatures using a large array autonomous each dispersed 1 km apart surface Ross Ice Shelf. Sensing radio emissions 100 MHz GHz, station contains RF antennas, amplifiers, 1.92 G-sample/s, 850 bandwidth signal acquisition circuitry, pattern-matching...
We report the demonstration of a low-power pixelated readout system designed for three-dimensional ionization charge detection and digital liquid argon time projection chambers (LArTPCs). Unambiguous 3D was achieved using custom-designed system-on-a-chip ASIC (LArPix) to uniquely instrument each pad in array charge-collection pads. The LArPix ASIC, manufactured 180 nm bulk CMOS, provides 32 channels charge-sensitive amplification with self-triggered digitization multiplexed at temperatures...
A search for muon neutrinos from dark matter annihilations in the Galactic Center region has been performed with 40-string configuration of IceCube Neutrino Observatory using data collected 367 days live-time starting April 2008. The observed fluxes were consistent atmospheric background expectations. Upper limits on self-annihilation cross-section are obtained particle masses ranging 100 GeV to 10 TeV. In case decaying matter, lower lifetime have determined between 200 and 20
Radio-glaciological parameters from Moore's Bay, in the Ross Ice Shelf, have been measured. The thickness of ice shelf Bay was measured reflection times radio-frequency pulses propagating vertically through and reflecting ocean, is found to be $576\pm8$ m. Introducing a baseline 543$\pm$7 m between radio transmitter receiver allowed computation basal coefficient, $R$, separately englacial loss. depth-averaged attenuation length column, $$ shown depend linearly on frequency. best fit (95%...
The Heavy Flavor Tracker (HFT) was installed in the STAR experiment for 2014 heavy ion run of RHIC. Designed to improve vertex resolution and extend measurement capabilities flavor domain, HFT is composed three different silicon detectors based on CMOS monolithic active pixels (MAPS), pads strips respectively, arranged four concentric cylinders close interaction point.
The Gamma Ray Energy Tracking In-Beam Nuclear Array (GRETINA), a germanium detector system capable of measuring energy and position (within better than 2 mm rms) gamma-ray interaction points tracking multiple interactions, has been built. GRETINA is composed seven modules, each with four high purity crystals. Four custom designed electronics support the operation detectors: Digitizer/Digital Signal Processing (DSP), Trigger/Timing, Breakout Chassis Detector Interface Box. Digitizer/DSP...
We present program objectives and specifications for the first generation Ultra-Fast Astronomy (UFA) observatory which will explore a new astrophysical phase space by characterizing variability of optical (320 nm - 650 nm) sky in millisecond to nanosecond timescales. One UFA be search counterparts fast radio bursts (FRB) that can used identify origins FRB probe epoch reionization baryonic matter interstellar intergalactic mediums. The camera consist two single-photon resolution fast-response...
The heavy quark hadrons are suggested as a clean probe for studying the early dynamic evolution of dense and hot medium created in high-energy nuclear collisions. Heavy Flavor Tracker (HFT) STAR experiment, designed to improve vertex resolution extend measurement capabilities flavor domain, was installed 2014 ion run RHIC. It is composed three different silicon detectors arranged four concentric cylinders close interaction point. two inner-most layers based on CMOS monolithic active pixels...
For the 2014 heavy ion run of RHIC a new micro-vertex detector called Heavy Flavor Tracker (HFT) was installed in STAR experiment. The HFT consists three subsystems with various silicon technologies arranged 4 approximately concentric cylinders close to interaction point designed improve detector's vertex resolution and extend its measurement capabilities flavor domain. two innermost layers are placed at radii 2.8 cm 8 from beam line. These constructed 400 high sensors based on CMOS...
The STAR experiment at the Relativistic Heavy Ion Collider (RHIC) is designing a new vertex detector. purpose of this upgrade detector to provide high resolution pointing allow for direct topological reconstruction heavy flavor decays such as D0 by finding vertices displaced from collision greater than 60 microns. We are using Monolithic Active Pixel Sensor (MAPS) sensor technology and have coupled development readout system plan that leads final with <200 μs integration time, 400 M pixels...
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The “Heavy Flavor Tracker” (HFT) is an approved micro-vertex detector upgrade to the STAR experiment at RHIC, consisting of three subsystems with various technologies silicon sensors arranged in 4 concentric cylinders, be installed by 2014. This new vertex will improve track-pointing resolution a distance closest approach (DCA) ~ 30 μm order allow for direct and full topological reconstruction heavy quark meson decays better determination spectra. two innermost layers HFT close beam pipe,...
An application-specific integrated circuit (ASIC) wafer test system has been developed to provide comprehensive production screening of the ATLAS Semiconductor Tracker front-end chip (ABCD3T). The ABCD3T features a 128-channel analog front-end, digital pipeline, and communication circuitry, clocked at 40 MHz, which is bunch crossing frequency Large Hadron Collider. tester measures values tolerance ranges all critical IC parameters, including dc electronic noise, time resolution, clock...