N. S. Oblath
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View article: Search for Axion Dark Matter from 1.1 to 1.3 GHz with ADMX
Search for Axion Dark Matter from 1.1 to 1.3 GHz with ADMX Open
Axion dark matter can satisfy the conditions needed to account for all of the dark matter and solve the strong C P problem. The Axion Dark Matter eXperiment (ADMX) is a direct dark matter search using a haloscope to convert axions to p…
View article: Calorimetric wire detector for measurement of atomic hydrogen beams
Calorimetric wire detector for measurement of atomic hydrogen beams Open
A calorimetric detector for minimally disruptive measurements of atomic hydrogen beams is described. The calorimeter measures heat released by the recombination of hydrogen atoms into molecules on a thin wire. As a demonstration, the angul…
View article: Dynamics of Magnetic Evaporative Beamline Cooling for Preparation of Cold Atomic Beams
Dynamics of Magnetic Evaporative Beamline Cooling for Preparation of Cold Atomic Beams Open
The most sensitive direct neutrino mass searches today are based on measurement of the endpoint of the beta spectrum of tritium to infer limits on the mass of the unobserved neutrino. To avoid the smearing associated with the distribution …
View article: Calorimetric Wire Detector for Measurement of Atomic Hydrogen Beams
Calorimetric Wire Detector for Measurement of Atomic Hydrogen Beams Open
A calorimetric detector for minimally disruptive measurements of atomic hydrogen beams is described. The calorimeter measures heat released by the recombination of hydrogen atoms into molecules on a thin wire. As a demonstration, the angul…
View article: Cyclotron Radiation Emission Spectroscopy
Cyclotron Radiation Emission Spectroscopy Open
Major advances in experimental nuclear and particle physics are often motivated by the need to answer challenging questions. In 2009, Monreal and Formaggio were motivated by the problem of measuring the absolute mass of the neutrino to pro…
View article: Larmor power limit for cyclotron radiation of relativistic particles in a waveguide
Larmor power limit for cyclotron radiation of relativistic particles in a waveguide Open
Cyclotron radiation emission spectroscopy (CRES) is a modern technique for high-precision energy spectroscopy, in which the energy of a charged particle in a magnetic field is measured via the frequency of the emitted cyclotron radiation. …
View article: G4CMP: Condensed matter physics simulation using the G$\\scriptsize{\\mathrm{EANT}}$4 toolkit
G4CMP: Condensed matter physics simulation using the G$\\scriptsize{\\mathrm{EANT}}$4 toolkit Open
G4CMP simulates phonon and charge transport in cryogenic semiconductor crystals using the Geant4 toolkit. The transport code is capable of simulating the propagation of acoustic phonons as well as electron and hole charge carriers. Herein …
View article: Real-time signal detection for Cyclotron Radiation Emission Spectroscopy measurements using antenna arrays
Real-time signal detection for Cyclotron Radiation Emission Spectroscopy measurements using antenna arrays Open
Cyclotron Radiation Emission Spectroscopy (CRES) is a technique for precision measurement of the energies of charged particles, which is being developed by the Project 8 Collaboration to measure the neutrino mass using tritium beta-decay s…
View article: Nonvirialized axion search sensitive to Doppler effects in the Milky Way halo
Nonvirialized axion search sensitive to Doppler effects in the Milky Way halo Open
The Axion Dark Matter eXperiment (ADMX) has previously excluded Dine-Fischler-Srednicki- Zhitnisky (DFSZ) axions between 680-790 MHz under the assumption that the dark matter is described by the isothermal halo model. However, the precise …
View article: Cyclotron radiation emission spectroscopy of electrons from tritium <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>β</mml:mi></mml:math> decay and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Kr</mml:mi><mml:mprescripts/><mml:none/><mml:mrow><mml:mn>83</mml:mn><mml:mi mathvariant="normal">m</mml:mi></mml:mrow></mml:mmultiscripts></mml:math> internal conversion
Cyclotron radiation emission spectroscopy of electrons from tritium decay and internal conversion Open
Project 8 has developed a novel technique, cyclotron radiation emission spectroscopy (CRES), for direct neutrino mass measurements. A CRES-based experiment on the beta spectrum of tritium has been carried out in a small-volume apparatus. H…
View article: Low frequency, 100–600 MHz, searches with axion cavity haloscopes
Low frequency, 100–600 MHz, searches with axion cavity haloscopes Open
We investigate reentrant and dielectric loaded cavities for the purpose of extending the range of axion cavity haloscopes to lower masses, below the range where the Axion Dark Matter experiment (ADMX) has already searched. Reentrant and di…
View article: Searches for high frequency variations in the 8-B neutrino flux at the Sudbury neutrino observatory
Searches for high frequency variations in the 8-B neutrino flux at the Sudbury neutrino observatory Open
We have peformed three searches for high-frequency signals in the solar neutrino flux measured by the Sudbury Neutrino Observatory (SNO), motivated by the possibility that solar g-mode oscillations could affect the production or propagatio…
View article: Tritium Beta Spectrum Measurement and Neutrino Mass Limit from Cyclotron Radiation Emission Spectroscopy
Tritium Beta Spectrum Measurement and Neutrino Mass Limit from Cyclotron Radiation Emission Spectroscopy Open
The absolute scale of the neutrino mass plays a critical role in physics at every scale, from the subatomic to the cosmological. Measurements of the tritium end-point spectrum have provided the most precise direct limit on the neutrino mas…
View article: First Observation of Cyclotron Radiation from MeV-Scale <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mi>e</mml:mi><mml:mo>±</mml:mo></mml:msup></mml:math> following Nuclear <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>β</mml:mi></mml:math> Decay
First Observation of Cyclotron Radiation from MeV-Scale following Nuclear Decay Open
We present an apparatus for detection of cyclotron radiation yielding a frequency-based β^{±} kinetic energy determination in the 5 keV to 2.1 MeV range, characteristic of nuclear β decays. The cyclotron frequency of the radiating β partic…
View article: Dark matter axion search using a Josephson Traveling wave parametric amplifier
Dark matter axion search using a Josephson Traveling wave parametric amplifier Open
We describe the first implementation of a Josephson Traveling Wave Parametric Amplifier (JTWPA) in an axion dark matter search. The operation of the JTWPA for a period of about two weeks achieved sensitivity to axion-like particle dark mat…
View article: Search for a dark-matter induced Cosmic Axion Background with ADMX
Search for a dark-matter induced Cosmic Axion Background with ADMX Open
We report the first result of a direct search for a Cosmic ${\it axion}$ Background (C$a$B) - a relativistic background of axions that is not dark matter - performed with the axion haloscope, the Axion Dark Matter eXperiment (ADMX). Conven…
View article: SYNCA: A Synthetic Cyclotron Antenna for the Project 8 Collaboration
SYNCA: A Synthetic Cyclotron Antenna for the Project 8 Collaboration Open
Cyclotron Radiation Emission Spectroscopy (CRES) is a technique for measuring the kinetic energy of charged particles through a precision measurement of the frequency of the cyclotron radiation generated by the particle's motion in a magne…
View article: ADMX-Orpheus first search for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>70</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>μ</mml:mi><mml:mi>eV</mml:mi></mml:mrow></mml:math> dark photon dark matter: Detailed design, operations, and analysis
ADMX-Orpheus first search for dark photon dark matter: Detailed design, operations, and analysis Open
Dark Matter makes up 85% of the matter in the universe and 27% of its energy is density, but we don't know what compromises dark matter. It is possible that dark matter may be composed of either axions or dark photons, both of which can be…
View article: Search for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mn>70</mml:mn><mml:mtext> </mml:mtext><mml:mtext> </mml:mtext><mml:mi>μ</mml:mi><mml:mi>eV</mml:mi></mml:mrow></mml:math> Dark Photon Dark Matter with a Dielectrically Loaded Multiwavelength Microwave Cavity
Search for Dark Photon Dark Matter with a Dielectrically Loaded Multiwavelength Microwave Cavity Open
Microwave cavities have been deployed to search for bosonic dark matter candidates with masses of a few μeV. However, the sensitivity of these cavity detectors is limited by their volume, and the traditionally employed half-wavelength cavi…
View article: Viterbi decoding of CRES signals in Project 8
Viterbi decoding of CRES signals in Project 8 Open
Cyclotron radiation emission spectroscopy (CRES) is a modern approach for determining charged particle energies via high-precision frequency measurements of the emitted cyclotron radiation. For CRES experiments with gas within the fiducial…
View article: Axion Dark Matter Experiment: Detailed design and operations
Axion Dark Matter Experiment: Detailed design and operations Open
Axion dark matter experiment ultra-low noise haloscope technology has enabled the successful completion of two science runs (1A and 1B) that looked for dark matter axions in the 2.66–3.1 μeV mass range with Dine–Fischler–Srednicki–Zhitnisk…
View article: Dark Matter Axion Search Using a Josephson Traveling Wave Parametric Amplifier
Dark Matter Axion Search Using a Josephson Traveling Wave Parametric Amplifier Open
We present a new exclusion bound of axion-like particle dark matter with axion-photon couplings above $\mathrm{10^{-13}}$ $\mathrm{GeV^{-1}}$ over the frequency range 4796.7--4799.5 MHz, corresponding to a narrow range of axion masses cent…
View article: Search for "Invisible" Axion Dark Matter in the $3.3\text{-}4.2~{\mu}$eV Mass Range
Search for "Invisible" Axion Dark Matter in the $3.3\text{-}4.2~{\mu}$eV Mass Range Open
We report the results from a haloscope search for axion dark matter in the $3.3\text{-}4.2~{\mu}$eV mass range. This search excludes the axion-photon coupling predicted by one of the benchmark models of invisible axion dark matter, the KSV…
View article: Bayesian analysis of a future <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>β</mml:mi></mml:math> decay experiment's sensitivity to neutrino mass scale and ordering
Bayesian analysis of a future decay experiment's sensitivity to neutrino mass scale and ordering Open
Bayesian modeling techniques enable sensitivity analyses that incorporate detailed expectations regarding future experiments. A model-based approach also allows one to evaluate inferences and predicted outcomes, by calibrating (or measurin…
View article: Axion dark matter experiment: Run 1B analysis details
Axion dark matter experiment: Run 1B analysis details Open
Funder: \n U.S. Department of Energy\n http://dx.doi.org/10.13039/100000015
View article: Bayesian Analysis of a Future Beta Decay Experiment's Sensitivity to Neutrino Mass Scale and Ordering
Bayesian Analysis of a Future Beta Decay Experiment's Sensitivity to Neutrino Mass Scale and Ordering Open
Bayesian modeling techniques enable sensitivity analyses that incorporate detailed expectations regarding future experiments. A model-based approach also allows one to evaluate inferences and predicted outcomes, by calibrating (or measurin…
View article: Search for <i>hep</i> solar neutrinos and the diffuse supernova neutrino background using all three phases of the Sudbury Neutrino Observatory
Search for <i>hep</i> solar neutrinos and the diffuse supernova neutrino background using all three phases of the Sudbury Neutrino Observatory Open
© 2020 authors. Published by the American Physical Society. A search has been performed for neutrinos from two sources, the hep reaction in the solar pp fusion chain and the νe component of the diffuse supernova neutrino background (DSNB),…
View article: Distributed heterogeneous compute infrastructure for the study of additive manufacturing systems
Distributed heterogeneous compute infrastructure for the study of additive manufacturing systems Open
View article: Project 8: Measuring the tritium beta-decay spectrum using Cyclotron Radiation Emission Spectroscopy
Project 8: Measuring the tritium beta-decay spectrum using Cyclotron Radiation Emission Spectroscopy Open
The goal of the Project 8 experiment is to measure the absolute neutrino mass using tritium beta decays and a new spectroscopic technique, Cyclotron Radiation Emission Spectroscopy (CRES). CRES has the potential for extremely low backgroun…
View article: Cyclotron radiation emission spectroscopy signal classification with machine learning in project 8
Cyclotron radiation emission spectroscopy signal classification with machine learning in project 8 Open
The cyclotron radiation emission spectroscopy (CRES) technique pioneered by Project 8measures electromagnetic radiation fromindividual electrons gyrating in a backgroundmagnetic field to construct a highly precise energy spectrumfor beta d…