56 Works

Supporting data for: Optimal design of a toroidal field magnet system and cost of electricity implications for a tokamak using high temperature superconductors

T. S. Lee, I. Jenkins, Elizabeth Surrey & Damian Hampshire
The potential for reducing the Cost of Electricity (CoE) by using High Temperature Superconductors (HTS) in the Toroidal Field (TF) coils of a fusion tokamak power plant has been investigated using a new HTS module in the PROCESS systems code. We report the CoE and the design of HTS tokamaks that have been optimized by minimising the major radius of the plasma. Potential future improvements in both the superconducting properties and the structural materials for...

Sildenafil citrate data bundle

Paul Hodgkinson
A combination of solid-state NMR techniques, including 13C/1H correlation, 2H magic-angle spinning NMR and first principles calculation are employed to characterise the role of water in different hydration states of sildenafil citrate. The 13C spectrum is fully assigned for the first time and direct correlations made with respect to the crystal structure. 2H magic-angle spinning NMR is demonstrated to be a powerful tool for the study of dynamic and exchange processes in complex hydrate systems,...

Supporting data for Trimeric Cyclamers: Solution Aggregation and High Z′ Crystals Based on Guest Structure and Basicity

Jonathan W. Steed, Stuart R. Kennedy, Adeline Miquelot & Juan A. Aguilar
Ureidosalicylic acid forms remarkable trimeric cyclamer-like crystal structures with either three or six independent molecules in the asymmetric unit as a result of the excess of hydrogen bond donors and guest inclusion within the centre of the cyclamer. The structures persist in solution in hydrogen bond acceptor solvents suggesting a role in solution pre-association in forming high Z′ structures.

Single-photon interference due to motion in an atomic collective excitation: Supporting data

Daniel J. Whiting, Nikola Sibalic, James Keaveney, Charles S. Adams & Ifan G. Hughes
Quantum-state engineering is of critical importance to the development of quantum technologies. One promising platform is thermal atomic vapours, because they offer long coherence times with reproducible and scalable hardware. However, the inability to address isolated atomic states in a controlled manner, due to multi-level degeneracy and motional broadening, is a major obstacle to their wider application. Here we show how the atomic motion can be exploited to prepare robust and tunable collective quantum states....

Deviations from Born-Oppenheimer mass scaling in spectroscopy and ultracold molecular physics: research data

Jeremy M. Hutson & Jesse J. Lutz
We investigate Born-Oppenheimer breakdown (BOB) effects (beyond the usual mass scaling) for the electronic ground states of a series of homonuclear and heteronuclear alkali-metal diatoms, together with the Sr$_2$ and Yb$_2$ diatomics. Several widely available electronic structure software packages are used to calculate the leading contributions to the total isotope shift for commonly occurring isotopologs of each species. Computed quantities include diagonal Born-Oppenheimer corrections (mass shifts) and isotopic field shifts. Mass shifts dominate for light...

Supporting data: "Magnetic phase diagram of La_{2-x}Sr_{x}CoO_{4} revised using muon-spin relaxation"

Tom Lancaster
Abstract form the article: We report the results of a muon-spin relaxation (μSR) investigation of La_{2-x}Sr_{x}CoO_{4}, an antiferromagnetic insulating series which has been shown to support charge ordered and magnetic stripe phases and an hourglass magnetic excitation spectrum. We present a revised magnetic phase diagram, which shows that the suppression of the magnetic ordering temperature is highly sensitive to small concentrations of holes. Distinct behavior within an intermediate x range (0.2≤x≲0.6) suggests that the putative...

Bioinspired Breathable Architecture Data Archive

Rowan M Von Spreckelsen & Matthew T Harris
Abstract from paper: Thuja plicata is a coniferous tree which displays remarkable water channelling properties. In this article, an easily fabricated mesh inspired by the hierarchical macro surface structure of Thuja plicata branchlets is described which emulates this efficient water collection behaviour. The key parameters are shown to be the pore size, pore angle, mesh rotation, tilt angle (branch droop) and layering (branch overlap). Envisaged societal applications include water harvesting and low cost breathable architecture...

Supporting data for: Superconducting and mechanical properties of low-temperature solders for joints

Yeekin Tsui, Ra'ad Mahmoud, Elizabeth Surrey & Damian Hampshire
All large superconducting applications require electrical connections between superconductors or between superconductors and other metallic parts of the systems. Such connections are essential components for these applications and are usually made by melting the solder (or soft soldering). In general, the melting point, electrical resistivity, mechanical and wetting properties and toxicity are all important criteria when choosing the best solder for a specific application. If the solder itself is superconducting under the operating conditions of...

Data for "Dressed-state electromagnetically induced transparency for light storage in uniform phase spin-waves"

Nikola Šibalić
We present, experimentally and theoretically, a scheme for dressed-state electromagnetically induced transparency (EIT) in a three-step cascade system where a four-level system is mapped into an effective three-level system. Theoretical analysis reveals that the scheme provides coherent state control via adiabatic following and provides a generalized protocol for light storage in uniform phase spin-waves that are insensitive to motional dephasing. The three-step driving enables a number of other features including spatial selectivity of the excitation...

Data for "A single-mode external cavity diode laser using an intra-cavity atomic Faraday filter with short-term linewidth <400 kHz and long-term stability of <1 MHz"

James Keaveney
We report on the development of a diode laser system - the `Faraday laser' - using an atomic Faraday filter as the frequency-selective element. In contrast to typical external-cavity diode laser systems which offer tunable output frequency but require additional control systems in order to achieve a stable output frequency, our system only lases at a single frequency, set by the peak transmission frequency of the internal atomic Farady filter. Our system has both short-term...

Generalized Dynamic Object Removal for Dense Stereo Vision Based Scene Mapping using Synthesised Optical Flow - Evaluation Dataset

O.K. Hamilton & Toby P. Breckon
Mapping an ever changing urban environment is a challenging task as we are generally interested in mapping the static scene and not the dynamic objects therein, such as cars and people. We propose a novel approach to the problem of dynamic object removal within stereo based scene mapping that is both independent of the underlying stereo approach in use and applicable to varying object motion relative to scene depth and camera motion. By leveraging both...

Direct loading of a large Yb MOT on the 1S0 → 3P1 transition(Data Files)

Alex Guttridge, Stephen Hopkins, Stefan Kemp, Danielle Boddy, Ruben Freytag, Matthew Jones, Michael Tarbutt, Ed Hinds & Simon Cornish
Data files used in "Fluorescence spectroscopy of an ytterbium atomic beam". For more information refer to the README.txt file included in data zip file.

Versatile Zeeman slower CsYb data

Stephen A. Hopkins, Kirsteen L. Butler, Alexander Guttridge, Stefan L. Kemp, Ruben Freytag, Ed A. Hinds, Michael R. Tarbutt & Simon L. Cornish
We describe the design, construction and operation of a versatile dual-species Zeeman slower for both Cs and Yb, which is easily adaptable for use with other alkali metals and alkaline earths. With the aid of analytic models and numerical simulation of decelerator action, we highlight several real-world problems affecting the performance of a slower and discuss effective solutions. To capture Yb into a magneto-optical trap (MOT), we use the broad 1S0 to 1P1 transition at...

Research data for "Testing the limits of NMR crystallography: the case of caffeine–citric acid hydrate"

Hannah E. Kerr
The crystal structure of a new 1:2 caffeine-citric acid hydrate cocrystal is presented. The caffeine molecules are disordered over two positions, with the nature of the disorder confirmed to be static by 13C solid-state NMR. NMR linewidths in statically disordered systems reflect the distribution of local chemical environments, and this study investigates whether the disorder contribution to 13C linewidths can be predicted computationally. The limits of NMR crystallography calculations using density functional theory are tested...

Supporting data: Thesis "Creation of Ultracold Polar Ground-State RbCs Molecules", Peter K. Molony, 2016

Peter K. Molony
This thesis reports the creation and trapping of 87RbCs molecules in the absolute ground state with a temperature of 1 uK. We build a tunable narrow-linewidth laser system at 1550 nm and 980 nm, using a single high-finesse optical cavity as a reference for both colours. We use fibre-coupled electro-optic modulators to continuously tune both lasers. These allow a novel measurement of the free spectral range of the cavity to better than 1 part in...

Data for: "Real-Time Near-Field Terahertz Imaging with Atomic Optical Fluorescence"

Christopher G. Wade, Nikola Šibalić, Natalia R. De Melo, Jorge M. Kondo, Charles S. Adams & Kevin J. Weatherill
Terahertz (THz) near-field imaging is a flourishing discipline, with applications from fundamental studies of beam propagation to the characterisation of metameterials and waveguides. Beating the diffraction limit typically involves rastering structures or detectors with length scale shorter than the radiation wavelength; in the THz domain this has been achieved using a number of techniques including scattering tips and apertures. Alternatively, mapping THz fields onto an optical wavelength and imaging the visible light removes the requirement...

Characterisation of phosphorylated nucleotides by collisional and electron-based tandem mass spectrometry by FTICR MS

Jackie Mosely
FT ICR mass spectrometry: collision induced dissociation and electron-based dissociation of phosphorylated nucleotides

Research data for "Transverse field muon-spin rotation measurement of the topological anomaly in a thin film of MnSi"

Tom Lancaster, F. Xiao, Z. Salman, I. O. Thomas, S.J. Blundell, F.L. Pratt, S.J. Clark, T. Prokscha, A. Suter, S.L. Zhang, A.A. Baker & T. Hesjedal
We present the results of transverse-field muon-spin rotation measurements on an epitaxially grown 40 nm thick film of MnSi on Si(111) in the region of the field-temperature phase diagram where a skyrmion phase has been observed in the bulk. We identify changes in the quasistatic magnetic field distribution sampled by the muon, along with evidence for magnetic transitions around T ≈ 40 and 30 K. Our results suggest that the cone phase is not the...

Muon-spin relaxation study of the double perovskite insulators Sr2BOsO6 (B = Fe, Y, ln): Supporting data.

T Lancaster, R C Williams, F Xiao, I O Thomas, S J Clark, G A Cornish, S J Blundell, W Hayes, A K Paul, C Felser & M Jansen
Supporting data for the paper "Muon-spin relaxation study of the double perovskite insulators Sr2BOsO6 (B = Fe, Y, ln)"

Direct measurement of excited-state dipole matrix elements using electromagnetically induced transparency in the hyperfine Paschen-Back regime

Daniel J Whiting, James Keaveney, Charles S Adams & Ifan G Hughes
The folder "transmission-spectra" contains the raw data files (in CSV format) for the transmission signal of the probe beam along with files named etalon and reference which were used in the frequency calibration of the transmission spectra. The folder "beam-profiles" contains the raw images of the probe and control beams in BMP format.

Research data for "Nanoscale depth-resolved polymer dynamics probed by the implantation of low energy muons"

Tom Lancaster, Francis Pratt, Peter Baker, Stephen Blundell, Thomas Prokscha, Elvezio Morenzoni, Andreas Suter & Hazel Assender
The low energy muon (LEM) technique has been used to probe local changes in the dynamical spectrum of thin film polymer samples taking place as a function of the temperature and the implantation depth below the free surface. The studies have been made on samples of polydimethylsiloxane (PDMS) and polybutadiene (PB) using the transverse magnetic field (TF) configuration and diamagnetic probe muons. In PDMS evidence is found for suppression of the glass transition temperature near...

Registration Year

  • 2016
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