Search Results - "HAYDEN, M. E"
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Resonant quantum transitions in trapped antihydrogen atoms
Published in Nature (London) (22-03-2012)“…These authors demonstrate resonant quantum transitions in a pure antimatter atom—antihydrogen—by using microwave radiation to flip the spin of the positron of…”
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2
Trapped antihydrogen
Published in Nature (London) (02-12-2010)“…Antimatter was first predicted in 1931, by Dirac. Work with high-energy antiparticles is now commonplace, and anti-electrons are used regularly in the medical…”
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3
Fractionation of Magnetic Microspheres in a Microfluidic Spiral: Interplay between Magnetic and Hydrodynamic Forces
Published in PloS one (20-01-2017)“…Magnetic forces and curvature-induced hydrodynamic drag have both been studied and employed in continuous microfluidic particle separation and enrichment…”
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Enhanced Control and Reproducibility of Non-Neutral Plasmas
Published in Physical review letters (08-01-2018)“…The simultaneous control of the density and particle number of non-neutral plasmas confined in Penning-Malmberg traps is demonstrated. Control is achieved by…”
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A mechanically driven magnetic particle imaging scanner
Published in Applied physics letters (29-10-2018)“…We describe and demonstrate an approach to magnetic particle imaging in which particle excitation and field free point (FFP) manipulation are decoupled from…”
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Confinement of antihydrogen for 1,000 seconds
Published in Nature physics (01-07-2011)“…Atoms made of a particle and an antiparticle are unstable, usually surviving less than a microsecond. Antihydrogen, made entirely of antiparticles, is believed…”
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Erratum: Observation of the hyperfine spectrum of antihydrogen
Published in Nature (London) (25-01-2018)“…Nature 548, 66–69 (2017); doi:10.1038/nature23446 Owing to a technical error, author J. S. Wurtele was listed incorrectly as a corresponding author instead of…”
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Design and performance of a novel low energy multispecies beamline for an antihydrogen experiment
Published in Physical review. Accelerators and beams (01-04-2023)“…The ALPHA Collaboration, based at the CERN Antiproton Decelerator, has recently implemented a novel beamline for low energy (≲100eV) positron and antiproton…”
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A microfluidic spiral for size-dependent fractionation of magnetic microspheres
Published in Journal of magnetism and magnetic materials (01-11-2012)“…Magnetic microspheres (MMS) are useful tools for a variety of medical and pharmaceutical applications. Typically, commercially manufactured MMS exhibit broad…”
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Antihydrogen annihilation reconstruction with the ALPHA silicon detector
Published in Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment (21-08-2012)“…The ALPHA experiment has succeeded in trapping antihydrogen, a major milestone on the road to spectroscopic comparisons of antihydrogen with hydrogen. An…”
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Observation of the 1S–2S transition in trapped antihydrogen
Published in Nature (London) (26-01-2017)“…The 1S–2S transition in magnetically trapped atoms of antihydrogen is observed, and its frequency is shown to be consistent with that expected for hydrogen…”
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Observation of the hyperfine spectrum of antihydrogen
Published in Nature (London) (03-08-2017)“…The hyperfine splitting of antihydrogen has been measured and is consistent with expectations for atomic hydrogen. Assessing the antihydrogen spectrum…”
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Description and first application of a new technique to measure the gravitational mass of antihydrogen
Published in Nature communications (30-04-2013)“…Physicists have long wondered whether the gravitational interactions between matter and antimatter might be different from those between matter and itself…”
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14
Resolution enhancement in magnetic particle imaging via phase-weighting
Published in Journal of magnetism and magnetic materials (15-03-2020)“…•Signal phase in magnetic particle (MP) imaging encodes information about particle dynamics.•Particle dynamics are in turn influenced by the local strength of…”
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15
Observation of weak-limit quasiparticle scattering via broadband microwave spectroscopy of a d-wave superconductor
Published in Physical review letters (13-06-2003)“…There has long been a discrepancy between microwave conductivity measurements in high temperature superconductors and the conductivity spectrum expected in the…”
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Neutron-detected tomography of impurity-seeded superfluid helium
Published in Physical review letters (03-09-2004)“…We describe a neutron radiography technique that can be used to map the distribution of 3He impurities in liquid 4He, providing direct and quantitative access…”
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Active shielding of cylindrical saddle-shaped coils: Application to wire-wound RF coils for very low field NMR and MRI
Published in Journal of magnetic resonance (1997) (01-11-2005)“…We provide an exact expression for the magnetic field produced by cylindrical saddle-shaped coils and their ideal shield currents in the low-frequency limit…”
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An experimental limit on the charge of antihydrogen
Published in Nature communications (03-06-2014)“…The properties of antihydrogen are expected to be identical to those of hydrogen, and any differences would constitute a profound challenge to the fundamental…”
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Measurement of the 3He mass diffusion coefficient in superfluid 4He over the 0.45–0.95 K temperature range
Published in Europhysics letters (01-05-2008)“…In the analysis of our measurement of the mass diffusion of 3He in He II [1] we assumed that the 'relatively infrequent' 3He-3He collisions did not influence…”
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Restricted diffusion within a single pore
Published in Journal of magnetic resonance (1997) (01-08-2004)“…The time-dependent diffusion of 3He atoms perpendicular to the axis of a single macroscopically large cylindrical pore is studied using a steady (or constant)…”
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