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Excited-State Spectroscopy Using Single Spin Manipulation in Diamond

Fuchs, G.D. (author), Dobrovitski, V.V. (author), Hanson, R. (author), Batra, A. (author), Weis, C.D. (author), Schenkel, T. (author), Awschalom, D.D. (author)

We use single-spin resonant spectroscopy to study the spin structure in the orbital excited state of a diamond nitrogen-vacancy (N-V) center at room temperature. The data show that the excited-state spin levels have a zero-field splitting that is approximately half of the value of the ground state levels, a g factor similar to the ground state...

journal article 2008

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Single atom doping for quantum device development in diamond and silicon

Weis, C.D. (author), Schuh, A. (author), Batra, A. (author), Persaud, A. (author), Rangelow, I.W. (author), Bokor, J. (author), Lo, C.C. (author), Cabrini, S. (author), Sideras-Haddad, E. (author), Fuchs, G.D. (author), Hanson, R. (author), Awschalom, D.D. (author), Schenkel, T. (author)

The ability to inject dopant atoms with high spatial resolution, flexibility in dopant species, and high single ion detection fidelity opens opportunities for the study of dopant fluctuation effects and the development of devices in which function is based on the manipulation of quantum states in single atoms, such as proposed quantum computers....

journal article 2008

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Generation and transport of photoexcited electrons in single-crystal diamond

Heremans, F.J. (author), Fuchs, G.D. (author), Wang, C.F. (author), Hanson, R. (author), Awschalom, D.D. (author)

We report time-dependent photocurrent and transport measurements of sub-bandgap photoexcited carriers in nitrogen-rich (type Ib), single-crystal diamond. Transient carrier dynamics are characteristic of trapping conduction with long charge storage lifetimes of ? 3?hours. By measuring the photoexcited Hall effect, we confirm that the charge...

journal article 2009

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GOCE gravitational gradients along the orbit

Bouman, J. (author), Fiorot, S. (author), Fuchs, M. (author), Gruber, T. (author), Schrama, E.J.O. (author), Tscherning, C. (author), Veicherts, M. (author), Visser, P.N.A.M. (author)

GOCE is ESA’s gravity field mission and the first satellite ever that measures gravitational gradients in space, that is, the second spatial derivatives of the Earth’s gravitational potential. The goal is to determine the Earth’s mean gravitational field with unprecedented accuracy at spatial resolutions down to 100 km. GOCE carries a gravity...

journal article 2011

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Reverse movement and coalescence of water microdroplets in electrohydrodynamic atomization

Agostinho, L.L.F. (author), Fuchs, E.C. (author), Metz, S.J. (author), Yurteri, C.U. (author), Marijnissen, J.C.M. (author)

When a high voltage is applied to a liquid pumped through a needle, charged microdroplets can be formed, which are carried along the electric field lines. This phenomenon is called electrohydrodynamic atomization (EHDA), or simply electrospray. In this work we show that in the case of water, droplets may reverse their paths flying back toward...

journal article 2011

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Monodisperse water microdroplets generated by electrohydrodynamic atomization in the simple-jet mode

Agostinho, L.L.F. (author), Yurteri, C.U. (author), Fuchs, E.C. (author), Marijnissen, J.C.M. (author)

Experiments were conducted in order to investigate the influences of flow rate, applied voltage, and electric conductivity on droplet size and size distribution of water electrosprays in the simple-jet mode. The results show that the electric potential decreases significantly the relative standard deviation (RSD) of the spray size distribution,...

journal article 2012

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Morphology of water electrosprays in the simple-jet mode

Agostinho, L.L.F. (author), Tamminga, G. (author), Yurteri, C.U. (author), Brouwer, S.P. (author), Fuchs, E.C. (author), Marijnissen, J.C.M. (author)

Experiments were conducted in order to study and characterize electrohydrodynamic atomization in the simple-jet mode for inviscid liquids. The operational window of this mode regarding the electric potential and liquid flow rate is presented. From the data it could be concluded that this mode can be divided by the characteristics of its breakup...

journal article 2012

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Insulated multinozzle system for electrohydrodynamic atomization in the simple-jet mode

Agostinho, L.L.F. (author), Yurteri, C.U. (author), Wartena, J. (author), Brouwer, S.P. (author), Fuchs, E.C. (author), Marijnissen, J.C.M. (author)

In this study, a multinozzle electrohydrodynamic atomization device was designed and studied for electrosprays in the simple-jet mode. Results have shown that the proposed device produces droplets with similar diameter in all nozzles, that the electric field creates a unique dispersion of the charged droplets and that it can operate under...

journal article 2013

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Observing coseismic gravity change from the Japan Tohoku-Oki 2011 earthquake with GOCE gravity gradiometry

Fuchs, M.J. (author), Bouman, J. (author), Broerse, D.B.T. (author), Visser, P.N.A.M. (author), Vermeersen, L.L.A. (author)

The Japan Tohoku-Oki earthquake (9.0 Mw) of 11 March 2011 has left signatures in the Earth's gravity field that are detectable by data of the Gravity field Recovery and Climate Experiment (GRACE) mission. Because the European Space Agency's (ESA) satellite gravity mission Gravity field and steady-state Ocean Circulation Explorer (GOCE)—launched...

journal article 2013

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Antarctic outlet glacier mass change resolved at basin scale from satellite gravity gradiometry

Bouman, J. (author), Fuchs, M. (author), Ivins, E. (author), Van der Wal, W. (author), Schrama, E.J.O. (author), Visser, P.N.A.M. (author), Horwath, M. (author)

The orbit and instrumental measurement of the Gravity Field and Steady State Ocean Circulation Explorer (GOCE) satellite mission offer the highest ever resolution capabilities for mapping Earth's gravity field from space. However, past analysis predicted that GOCE would not detect changes in ice sheet mass. Here we demonstrate that GOCE gravity...

journal article 2014

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Distributed fault slip model for the 2011 Tohoku-Oki earthquake from GNSS and GRACE/GOCE satellite gravimetry

Fuchs, Martin Johann (author), Hooper, Andrew (author), Broerse, D.B.T. (author), Bouman, Johannes (author)

The Gravity Recovery and Climate Experiment (GRACE) mission (launched 2002) and the Gravity Field and Steady-State Ocean Circulation Explorer (GOCE) mission (March 2009 to November 2013) collected spaceborne gravity data for the preseismic and postseismic periods of the 2011 Tohoku-Oki earthquake. In addition, the dense Japan GeoNet Global...

journal article 2016

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Social justice in the context of adaptation to climate change—reflecting on different policy approaches to distribute and allocate flood risk management

Thaler, Thomas (author), Fuchs, Sven (author), Priest, Sally (author), Doorn, N. (author)

journal article 2017

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First-Order Induced Current Density Imaging and Electrical Properties Tomography in MRI

Fuchs, P.S. (author), Mandija, Stefano (author), Stijnman, Peter R.S. (author), Brink, Wyger M. (author), van den Berg, Cornelis A.T. (author), Remis, R.F. (author)

In this paper, we present an efficient dedicated electrical properties tomography (EPT) algorithm (called first-order current density EPT ) that exploits the particular radio frequency field structure, which is present in the midplane of a birdcage coil, to reconstruct conductivity and permittivity maps in this plane from B ^ + 1 data. The...

journal article 2018

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Semiautomatic Assessment of the Terminal Ileum and Colon in Patients with Crohn Disease Using MRI (the VIGOR++ Project)

Puylaert, Carl A.J. (author), Schüffler, Peter J. (author), Naziroglu, R.E. (author), Tielbeek, Jeroen A.W. (author), Li, Z. (author), Makanyanga, Jesica C. (author), Tutein Nolthenius, Charlotte J. (author), Nio, C. Yung (author), Pendsé, Douglas A. (author), Menys, Alex (author), Ponsioen, Cyriel Y. (author), Atkinson, David (author), Forbes, Alastair (author), Buhmann, Joachim M. (author), Fuchs, Thomas J. (author), Hatzakis, Haralambos (author), van Vliet, L.J. (author), Stoker, Jaap (author), Taylor, Stuart A. (author), Vos, F.M. (author)

Rationale and Objectives: The objective of this study was to develop and validate a predictive magnetic resonance imaging (MRI) activity score for ileocolonic Crohn disease activity based on both subjective and semiautomatic MRI features. Materials and Methods: An MRI activity score (the “virtual gastrointestinal tract [VIGOR]” score) was...

journal article 2018

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Large-scale experiments into the tsunamigenic potential of different iceberg calving mechanisms

Heller, Valentin (author), Chen, Fan (author), Brühl, Markus (author), Gabl, Roman (author), Chen, X. (author), Wolters, Guido (author), Fuchs, Helge (author)

Mass balance analysis of ice sheets is a key component to understand the effects of global warming. A significant component of ice sheet and shelf mass balance is iceberg calving, which can generate large tsunamis endangering human beings and coastal infrastructure. Such iceberg-tsunamis have reached amplitudes of 50 m and destroyed harbours....

journal article 2019

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Cerebral regional tissue oxygen saturation to guide oxygen delivery in preterm neonates during immediate transition after birth (COSGOD III): An investigator-initiated, randomized, multi-center, multi-national, clinical trial on additional cerebral tissue oxygen saturation monitoring combined with defined treatment guidelines versus standard monitoring and treatment as usual in premature infants during immediate transition: Study protocol for a randomized controlled trial

Pichler, Gerhard (author), Baumgartner, Sigrid (author), Biermayr, Marlene (author), Dempsey, Eugene (author), Fuchs, Hans (author), Goos, T.G. (author), Lista, Gianluca (author), Lorenz, Laila (author), Karpinski, Lukasz (author)

Background: Transition immediately after birth is a complex physiological process. The neonate has to establish sufficient ventilation to ensure significant changes from intra-uterine to extra-uterine circulation. If hypoxia or bradycardia or both occur, as commonly happens during immediate transition in preterm neonates, cerebral hypoxia...

journal article 2019

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Developments in electrical-property tomography based on the contrast-source inversion method

Leijsen, R.L. (author), Fuchs, P.S. (author), Brink, Wyger (author), Webb, A. (author), Remis, R.F. (author)

The main objective of electrical-property tomography (EPT) is to retrieve dielectric tissue parameters from B ₁ ⁺ data as measured by a magnetic-resonance (MR) scanner. This is a so-called hybrid inverse problem in which data are defined inside the reconstruction domain of interest. In this paper, we discuss recent and...

journal article 2019

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Gradient Coil Design and Realization for a Halbach-Based MRI System

De Vos, Bart (author), Fuchs, P.S. (author), O'Reilly, Thomas (author), Webb, A. (author), Remis, R.F. (author)

In this article, we design and construct gradient coils for a Halbach permanent-magnet array magnetic resonance (MR) scanner. The target field method, which is widely applied for the case of axial static magnetic fields, has been developed for a transverse static magnetic field as produced by a Halbach permanent-magnet array. Using this...

journal article 2020

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Electrically induced liquid-liquid phase transition in a floating water bridge identified by refractive index variations

Fuchs, Elmar C. (author), Woisetschläger, Jakob (author), Wexler, Adam D. (author), Pecnik, Rene (author), Vitiello, Giuseppe (author)

A horizontal electrohydrodynamic (EHD) liquid bridge (also known as a “floating water bridge”) is a phenomenon that forms when high voltage DC (kV·cm^-1) is applied to pure water in two separate beakers. The bridge, a free-floating connection between the beakers, acts as a cylindrical lens and refracts light. Using an...

journal article 2021

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Transceive phase corrected 2D contrast source inversion-electrical properties tomography

Stijnman, Peter R.S. (author), Mandija, Stefano (author), Fuchs, P.S. (author), van den Berg, Cornelis A.T. (author), Remis, R.F. (author)

Purpose: To remove the necessity of the tranceive phase assumption for CSI-EPT and show electrical properties maps reconstructed from measured data obtained using a standard 3T birdcage body coil setup. Methods: The existing CSI-EPT algorithm is reformulated to use the transceive phase rather than relying on the transceive phase assumption....

journal article 2021