A5091799456- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Radio Astronomy Observations and Technology
- Superconducting and THz Device Technology
- Cosmology and Gravitation Theories
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Neutrino Physics Research
- Stellar, planetary, and galactic studies
- Astrophysics and Star Formation Studies
- Geophysics and Gravity Measurements
- Astro and Planetary Science
- Physics of Superconductivity and Magnetism
- Computational Physics and Python Applications
- Advanced Thermodynamic Systems and Engines
- Astrophysics and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Black Holes and Theoretical Physics
- Solar and Space Plasma Dynamics
- Scientific Research and Discoveries
- Adaptive optics and wavefront sensing
- GNSS positioning and interference
Massachusetts Institute of Technology
2020-2025
A. Alikhanyan National Laboratory
2024
Institute of High Energy Physics
2023-2024
University of Antwerp
2024
Twin Cities Orthopedics
2024
University of Minnesota
2024
The University of Tokyo
2022-2024
FPT University
2024
Kavli Institute for the Physics and Mathematics of the Universe
2022-2024
Western University of Health Sciences
2024
We measured the cross section of coherent elastic neutrino-nucleus scattering (CEvNS) using a CsI[Na] scintillating crystal in high flux neutrinos produced at Spallation Neutron Source Oak Ridge National Laboratory. New data collected before detector decommissioning have more than doubled dataset since first observation CEvNS, achieved with this detector. Systematic uncertainties also been reduced an updated quenching model, allowing for improved precision. With these analysis improvements,...
Future observations of cosmic microwave background (CMB) polarisation have the potential to answer some most fundamental questions modern physics and cosmology, including: what physical process gave birth Universe we see today? What are dark matter energy that seem constitute 95% density Universe? Do need extensions standard model particle interactions? Is ΛCDM cosmological scenario correct, or missing an essential piece puzzle? In this paper, list requirements for a future CMB survey...
The COHERENT Collaboration searched for scalar dark matter particles produced at the Spallation Neutron Source with masses between 1 and 220 MeV/c^{2} using a CsI[Na] scintillation detector sensitive to nuclear recoils above 9 keV_{nr}. No evidence is found we thus place limits on allowed parameter space. With this low-threshold detector, are coherent elastic scattering nuclei. cross section process orders of magnitude higher than other processes historically used accelerator-based...
Background: Clinical trials of anti-Aβ monoclonal antibodies in Alzheimer disease (AD) infer target engagement from Aβ positron emission tomography (PET) and/or fluid biomarkers such as cerebrospinal (CSF) Aβ42/40.However, these measure deposits indirectly incompletely.In contrast, postmortem neuropathologic assessments allow direct investigation treatment effects on brain and many other pathologic features.Methods: From a clinical trial dominantly inherited AD, we measured...
Abstract We present a study of the impact beam far side-lobe lack knowledge on measurement Cosmic Microwave Background B -mode signal at large scale. Beam side-lobes induce mismatch in transfer function Galactic foregrounds between dipole and higher multipoles which degrads performances component separation methods. This leads to foreground residuals CMB map. It is expected be one main source systematic effects future polarization observations. Thus, it becomes crucial for all-sky survey...
Recent developments of transition-edge sensors (TESs), based on extensive experience in ground-based experiments, have been making the sensor techniques mature enough for their application future satellite CMB polarization experiments. LiteBIRD is most advanced phase among such satellites, targeting its launch Japanese Fiscal Year 2027 (2027FY) with JAXA's H3 rocket. It will accommodate more than 4000 TESs focal planes reflective low-frequency and refractive medium-and-high-frequency...
Abstract Microsphere biolasers have recently emerged as a promising platform for applications in bioimaging and sensing, owing to their biocompatibility narrow spectral linewidth. However, lasing characteristics are highly size-dependent, making the fabrication of uniform tunable microspheres essential, yet still challenging. Conventional methods, typically based on microfluidic technology, involve complex costly setups. In this study, we propose an inkjet printing-based technique simple...
The Spallation Neutron Source (SNS) at Oak Ridge National Laboratory is a pulsed source of neutrons and, as by-product this operation, an intense neutrinos via stopped-pion decay. COHERENT collaboration uses to investigate coherent elastic neutrino-nucleus scattering and other physics with suite detectors. This work includes description our geant4 simulation neutrino production the SNS flux calculation which informs studies. We estimate uncertainty $\ensuremath{\sim}10%$ level based on...
We report the highest spatial resolution measurement of magnetic fields in M17 using thermal dust polarization taken by SOFIA/HAWC+ centered at 154 $\mu$m wavelength. Using Davis-Chandrasekhar-Fermi method, we found presence strong $980 \pm 230\;\mu$G and $1665 885\;\mu$G lower-density (M17-N) higher-density (M17-S) regions, respectively. The field morphology M17-N possibly mimics gravitational collapse molecular cores while M17-S run perpendicular to matter structure display a pillar an...
LiteBIRD is a planned JAXA-led CMB B-mode satellite experiment aiming for launch in the late 2020s, with primary goal of detecting imprint primordial inflationary gravitational waves. Its current baseline focal-plane configuration includes 15 frequency bands between 40 and 402 GHz, fulfilling mission requirements to detect amplitude waves total uncertainty on tensor-to-scalar ratio, $\delta r$, down r<0.001$. A key aspect this performance accurate astrophysical component separation, ability...
Abstract A prototype version of the Q & U bolometric interferometer for cosmology (QUBIC) underwent a campaign testing in laboratory at Astroparticle Physics and Cosmology Paris (APC). The detection chain is currently made 256 NbSi transition edge sensors (TES) cooled to 320 mK. readout system 128:1 time domain multiplexing scheme based on 128 SQUIDs 1 K that are controlled amplified by SiGe application specific integrated circuit 40 K. We report performance this characterization TES....
We study the HII regions associated with NGC 6334 molecular cloud observed in sub-millimeter and taken as part of B-fields In STar-forming Region Observations (BISTRO) Survey. particular, we investigate polarization patterns magnetic field morphologies these regions. Through pattern pressure calculation analyses, several bubbles indicate that gas lines have been pushed away from bubble, toward an almost tangential (to bubble) morphology. densest 6334, where morphology is similar to...
We report the first measurement of polarized thermal dust emission toward entire early and massive Infrared Dark Cloud G11.11$-$0.12 taken by polarimeter SOFIA/HAWC+ at 214 $\mu m$ wavelength. Magnetic fields (B-fields) obtained from tend to be perpendicular filament's spine. produce a map B-field strengths for center region filament. The vary in range 100-600 $\mu\rm{G}$ are strongest along central is sub-Alfv\'enic mostly sub-critical meaning that B-fields dominate over turbulence strong...
We present and analyze observations of polarized dust emission at 850 $\mu$m towards the central 1 pc $\times$ hub-filament structure Monoceros R2 (Mon R2). The data are obtained with SCUBA-2/POL-2 on James Clerk Maxwell Telescope (JCMT) as part BISTRO (B-fields in Star-forming Region Observations) survey. orientations magnetic field follow spiral Mon R2, which well-described by an axisymmetric model. estimate turbulent component using angle difference between our best-fit model underlying...
LiteBIRD is a candidate for JAXA s strategic large mission to observe the cosmic microwave background (CMB) polarization over full sky at angular scales.It planned be launched in 2020s with an H3 launch vehicle three years of observations Sun-Earth Lagrangian point (L2).The concept design has been studied by researchers from Japan, U.S., Canada and Europe during ISAS Phase-A1.Large scale measurements
In this paper we describe QUBIC, an experiment that will observe the polarized microwave sky with a novel approach, which combines sensitivity of state-of-the art bolometric detectors systematic effects control typical interferometers. QUBIC unique features are so-called "self-calibration", technique allows us to clean measured data from instrumental effects, and its spectral imaging power, i.e. ability separate signal in various sub-bands within each frequency band. two main bands: 150 GHz...
We report on the technical design and expected performance of a 592 kg heavy-water-Cherenkov detector to measure absolute neutrino flux from pion-decay-at-rest source at Spallation Neutron Source (SNS) Oak Ridge National Laboratory (ORNL). The will be located roughly 20 m SNS target with better than 5% statistical uncertainty in 2 years. This heavy-water serve as first module two-module system ultimately 2-3% both First Target Station planned Second SNS. significantly reduce dominant...
End-to-end simulations play a key role in the analysis of any high-sensitivity CMB experiment, providing high-fidelity systematic error propagation capabilities unmatched by other means. In this paper, we address an important issue regarding such simulations, namely how to define inputs terms sky model and instrument parameters. These may either be taken as constrained realization derived from data, or random independent data. We refer these Bayesian frequentist respectively. show that two...
We present an analysis of the main systematic effects that could impact measurement CMB polarization with proposed CORE space mission. employ timeline-to-map simulations to verify instrumental set-up and scanning strategy allow us measure sky a level accuracy adequate mission science goals. also show how observations can be processed mitigate contamination by potentially worrying systematics, including intensity-to-polarization leakage due bandpass mismatch, asymmetric beams, pointing errors...
Future Cosmic Microwave Background (CMB) satellite missions aim to use the B mode polarization measure tensor-to-scalar ratio r with a sensitivity σr ≲ 10−3. Achieving this goal will not only require sufficient detector array but also unprecedented control of all systematic errors inherent in CMB measurements. Since measurements derive from differences between observations at different times and sensors, response mismatches introduce leakages intensity thus lead spurious signal. Because...
Abstract We present results of several measurements CsI[Na] scintillation response to 3–60 keV energy nuclear recoils performed by the COHERENT collaboration using tagged neutron elastic scattering experiments and an endpoint technique. Earlier results, used estimate coherent neutrino-nucleus (CEvNS) event rate for first observation this process achieved at Spallation Neutron Source (SNS), have been reassessed. discuss corrections identified systematic effects update respective uncertainty...
LiteBIRD, the next-generation cosmic microwave background (CMB) experiment, aims for a launch in Japan's fiscal year 2032, marking major advancement exploration of primordial cosmology and fundamental physics. Orbiting Sun-Earth Lagrangian point L2, this JAXA-led strategic L-class mission will conduct comprehensive mapping CMB polarization across entire sky. During its 3-year mission, LiteBIRD employ three telescopes within 15 unique frequency bands (ranging from 34 through 448 GHz),...
(abridged) Together with gravity, turbulence, and stellar feedback, magnetic fields (B-fields) are thought to play a critical role in the evolution of molecular clouds star formation processes. We aim map morphology measure strength B-fields nearby cloud, rho Ophiuchus-A ($\rho$ Oph-A), then understand regulating shaping cloud. have analyzed far-infrared (FIR) polarization thermal dust emission observed by SOFIA/HAWC$+$ at 89 154 $\mu$m toward densest part $\rho$ Oph-A, which is irradiated...