213 Works

Atomic line vs. lens cavity filters: A comparison of their merits [Dataset]

Clare Higgins
We present a comparison between lens cavity filters and atomic line filters, discussing their relative merits for applications in quantum optics. We describe the design, characterization and stabilization procedure of a lens cavity filter, which consists of a high-reflection coated commercially available plano-convex lens, and compare it to an ultra-narrow atomic band-pass filter utilizing the D2 absorption line in atomic rubidium vapor. We find that the cavity filter peak transmission frequency and bandwidth can be...

Are ultracold molecular collisions sticky? [dataset]

Philip David Gregory & Matthew Frye
Understanding and controlling collisions is crucial to the burgeoning field of ultracold molecules. All experiments so far have observed fast loss of molecules from the trap. However, the dominant mechanism for collisional loss is not well understood when there are no allowed 2-body loss processes. Here we experimentally investigate collisional losses of nonreactive ultracold RbCs molecules, and compare our findings with the sticky collision hypothesis that pairs of molecules form long-lived collision complexes. We demonstrate...

Resolving Alternative Organic Crystal Structures using Density Functional Theory and NMR Chemical Shifts [dataset]

Cory Widdifield
Alternative (‘repeat’) determinations of organic crystal structures deposited in the Cambridge Structural Database are analysed to characterise the nature and magnitude of the differences between structure solutions obtained by diffraction methods. Of the >3000 structure pairs considered, over 20% exhibited local structural differences exceeding 0.25 Å. In most cases (about 83%), structural optimisation using density functional theory (DFT) resolved the differences. Many of the cases where distinct and chemically significant structural differences remained after optimisation...

Splitting of two-component solitons from collisions with narrow potential barriers [dataset]

Callum Grimshaw
We consider the interaction of two component bright-bright solitons with a narrow potential barrier (splitter) in the framework of the two-component Gross-Pitaevskii (nonlinear-Schroedinger) system, with self-attraction within each component and cross-attraction between the components, motivated by the splitting of composite solitons facilitating the design of two-component soliton-interferometer schemes. We determine approximate analytic results by assuming a weak potential barrier and applying perturbation theory to the limit where the system becomes integrable. We do this for...

Electrical and mechanical diagnostic indicators of wind turbine induction generator rotor faults [dataset]

Donatella Zappalá
In MW-sized wind turbines, the most widely-used generator is the wound rotor induction machine, with a partially-rated voltage source converter connected to the rotor. This generator is a significant cause of wind turbine fault modes. In this paper, a harmonic time-stepped generator model is applied to derive wound rotor induction generator electrical & mechanical signals for fault measurement, and propose simple closed-form analytical expressions to describe them. Predictions are then validated with tests on a...

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...

Production and characterization of a dual species magneto-optical trap of cesium and ytterbium.

S. L. Kemp, K. L. Butler, R. Fretag, S. A. Hopkins, E. A. Hinds, M. R. Tarbutt & S. L. Cornish
Abstract from article: We describe an apparatus designed to trap and cool a Yb and Cs mixture. The apparatus consists of a dual species effusive oven source, dual species Zeeman slower, magneto-optical traps in a single ultra-high vacuum science chamber, and the associated laser systems. The dual species Zeeman slower is used to load sequentially the two species into their respective traps. Its design is flexible and may be adapted for other experiments with different...

Fire Image Data Set for Dunnings 2018 study - PNG still image set

Andy Dunnings

Data and Software for Degiacomi et al, Structure, 2017

Matteo T. Degiacomi, Justin L. P. Benesch, Carla Schmidt & Andrew J. Baldwin
Data and Software supporting Degiacomi et al study about a new method and associated software, DynamXL, that accommodates intrinsic protein dynamics in the modelling of cross-linking data. This approach substantially reduces error rates, leading to higher confidence in structure assessment and improved protein-protein docking.

Fracture attribute scaling and connectivity in the Devonian Orcadian Basin with implications for geologically equivalent sub-surface fractured reservoirs [dataset]

Anna M. Dichiarante
Fracture attribute scaling and connectivity datasets from analogue systems are widely used to inform sub-surface fractured reservoir models in a range of geological settings. However, significant uncertainties are associated with the determination of reliable scaling parameters in surface exposures, particularly for fault widths and fracture aperture. This has limited our ability to upscale key parameters that control fluid-flow at reservoir to basin scales. In this study, we present nine 1D‑transect (scanline) fault and fracture attribute...

Supporting Data for Pharmaceutical Polymorph Control in a Drug-Mimetic Supramolecular Gel

Jonathan A. Foster, Krishna K. Damodaran, Antoine Maurin, Graeme M. Day, Hugh P. G. Thompson, Gary S. Cameron, Jenifer Cuestra & Jonathan W. Steed
We report the synthesis of a bis(urea) gelator designed to specifically mimic the chemical structure of the highly polymorphic drug substance ROY. Crystallization of ROY from toluene gels of this gelator results in the formation of the metastable red form instead of the thermodynamic yellow polymorph. In contrast, all other gels and solution control experimetns give the yellow form. Conformational and crystal structure prediction methods have been used to propose the structure of the gel...

The impact of disruptive powertrain technologies on energy consumption and carbon dioxide emissions from heavy-duty vehicles [dataset]

Andrew John Smallbone
This data underpins the article: The impact of disruptive powertrain technologies on energy consumption and carbon dioxide emissions from heavy-duty vehicles DOI information: 10.1016/j.ecmx.2020.100030 It is the outputs from the model which has been published and described in the article.

Measuring the disorder of vortex lattices in a Bose-Einstein condensate: supporting data

A. Rakonjac, A. L. Marchant, T. P. Billam, J. L. Helm, M. M. H. Yu, S. A. Gardiner & S. L. Cornish
We report observations of the formation and subsequent decay of a vortex lattice in a Bose-Einstein condensate confined in a hybrid optical-magnetic trap. Vortices are induced by rotating the anharmonic magnetic potential that provides confinement in the horizontal plane. We present simple numerical techniques based on image analysis to detect vortices and analyse their distributions. We use these methods to quantify the amount of order present in the vortex distribution as it transitions from a...

Real-time traversable surface detection by colour space fusion and temporal analysis - Evaluation Dataset

Toby P. Breckon & Ioannis Katramados
Data set from research paper: Real-Time Traversable Surface Detection by Colour Space Fusion and Temporal Analysis (I. Katramados, S. Crumpler, T.P. Breckon), In Proc. International Conference on Computer Vision Systems, Springer, Volume 5815, pp. 265-274, 2009. Previously released (2009-2015) as zip file download from personal web page of the authors (Katramados / Breckon).

Data_for_the_paper_HD-2D_Routine_high-dispersion two-dimensional NMR

Juan A. Aguilar, Raquel Belda, Alan M. Kenwright & Adolfo Botana
The present manuscript showcases how compressive sensing and pure shift techniques can be combined to produce two-dimensional NMR spectra with a resolving power far higher than can be achieved by conventional means in just a fraction of the time. Compressive sampling can be used to extend the resolving power of multidimensional experiments, but the effective resolution is ultimately limited by the presence of multiplets. Pure shift techniques can remove the multiplet problem but they are...

Citation Data Comparison [dataset]

James Bisset
Comparison of citation date for three published journal articles (2012,2015,2016) as provided by three sources: Google Scholar, Scopus, Web of Science. Data supporting blog post at https://dulib.home.blog/2019/07/17/i-am-not-a-number-i-am-a-free-man/

Magnetic Feshbach resonances in ultracold collisions between Cs and Yb atoms [dataset]

B. C. Yang, Matthew D. Frye & Jeremy M. Hutson
We investigate magnetically tunable Feshbach resonances in ultracold collisions between ground-state Yb and Cs atoms, using coupled-channel calculations based on an interaction potential recently determined from photoassociation spectroscopy. We predict resonance positions and widths for all stable isotopes of Yb, together with resonance decay parameters where appropriate. The resonance patterns are richer and more complicated for fermionic Yb than for spin-zero isotopes, because there are additional level splittings and couplings due to scalar and tensorial...

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...

Robust NMR water signal suppression for demanding analytical applications

Juan A. Aguilar & Simon J. Kenwright
We describe the design and application of robust, general-purpose water signal suppression pulse sequences well suited to chemometric work. Such pulse sequences need to deal well with pulse mis-calibrations, radiation damping, chemical exchange, and the presence of sample inhomogeneities, as well as with significant variations in sample characteristics such as pH, ionic strength, relaxation characteristics and molecular weight. Of course, such pulse sequences should produce un- distorted lineshapes and baselines and work well both under...

Measuring the Formation Energy Barrier of Skyrmions in Zinc Substituted Cu2OSeO3 [dataset]

Murray N. Wilson, Marta Crisanti, Christopher Barker, Aleš Štefančič, Jonathan S. White, Max T. Birch, Geetha Balakrishnan, Robert Cubitt & Peter D. Hatton
We report small angle neutron scattering (SANS) measurements of the skyrmion lattice in (Cu0.976Zn0.024)2OSeO3 under the application of electric and magnetic fields. These measurements show an expansion of the skyrmion lattice stability region with electric field. Furthermore, using time-resolved SANS, we observe the slow formation of skyrmions after an electric or magnetic field is applied, which has not been observed in pristine Cu2OSeO3 crystals. The measured formation times are dramatically longer than the corresponding skyrmion...

Vikki Bird thesis supplementary data: Structure and dynamics in polystyrene/single-walled carbon nanotube nanocomposites via neutron scattering techniques

Vikki Bird
The dataset archive contains Origin software project files (*.opj). A free viewer to inspect data can be downloaded form http://www.originlab.com

Metadata for 'Long lifetime hole traps at grain boundaries in CdTe thin-film photovoltaics'

Budhika Mendis
A novel time-resolved cathodoluminescence method, where a pulsed electron beam is generated via the photoelectric effect, is used to probe individual CdTe grain boundaries. Excitons have a short lifetime (100 ps) within the grains and are rapidly quenched at the grain boundary. However, a ~47 meV shallow acceptor, believed to be due to oxygen, can act as a long lifetime hole trap, even at the grain boundaries where their concentration is higher. This provides direct...

Automated translating beam profiler for in-situ laser beam spot-size and focal position measurements. [dataset]

James Keaveney
Data files supporting the paper "Automated translating beam profiler for in-situ laser beam spot-size and focal position measurements", arXiv.org/abs/1801.06508. Data used in the figures of the paper. Separate sub-folders for each figure. See the information.txt file for information specific to each figure

Two-photon photoassociation spectroscopy of CsYb: ground-state interaction potential and interspecies scattering lengths [dataset]

Alexander Guttridge
Data files used in the publication "Two-photon photoassociation spectroscopy of CsYb: ground-state interaction potential and interspecies scattering lengths"

Magnetic trapping and velocity map imaging of O atoms [dataset]

Jack Eardley

Registration Year

  • 2015
  • 2016
  • 2017
  • 2018
  • 2019
  • 2020

Resource Types

  • Dataset