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All Outputs (20)

In-situ synchrotron X-ray topography observation of double-ended Frank-Read sources in PVT-grown 4H-SiC wafers (2018)
Conference Proceeding
Yang, Y., Guo, J., Raghothamachar, B., Dudley, M., Welt, S., Danilewsky, A., …Tanner, B. (2018). In-situ synchrotron X-ray topography observation of double-ended Frank-Read sources in PVT-grown 4H-SiC wafers. In R. Stahlbush, P. Neudeck, A. Bhalla, R. Devaty, M. Dudley, & A. Lelis (Eds.), Silicon Carbide and Related Materials 2017 (172-175). https://doi.org/10.4028/www.scientific.net/msf.924

Direct observation of stress relaxation process in 4H-SiC homoepitaxial layers via in-situ synchrotron X-ray topography (2018)
Conference Proceeding
Guo, J., Yang, Y., Raghothamachar, B., Dudley, M., Welt, S., Danilewsky, A., …Tanner, B. (2018). Direct observation of stress relaxation process in 4H-SiC homoepitaxial layers via in-situ synchrotron X-ray topography. In R. Stahlbush, P. Neudeck, A. Bhalla, R. Devaty, M. Dudley, & A. Lelis (Eds.), Silicon Carbide and Related Materials 2017 (176-179). https://doi.org/10.4028/www.scientific.net/msf.924

Higgs Cosmology and Dark Matter (2018)
Conference Proceeding
Moss, I., & Gregory, R. (2018). Higgs Cosmology and Dark Matter. In 2nd World Summit : Exploring the dark side of the Universe (EDSU2018) - dark matter. https://doi.org/10.22323/1.335.0010

Higgs vacuum stability has important consequences for cosmology. In particular, we argue that if the Higgs vacuum is metastable, then the dark matter cannot contain a single black hole of mass less than 1015g in our entire past light cone. In additio... Read More about Higgs Cosmology and Dark Matter.

MMHT Updates, LHC jets and α S (2018)
Conference Proceeding
Thorne, R., Harland-Lang, L., & Martin, A. (2018). MMHT Updates, LHC jets and α S. In XXVI International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS2018) - WG1: Structure Functions and Parton Densities. https://doi.org/10.22323/1.316.0030

We summarise the effects of including jet data from the LHC in the MMHT PDF extraction. We also present the latest results on the preferred value of the strong coupling α S ( M 2 Z ) αS(MZ2) in a number of fit variations. The best current value with... Read More about MMHT Updates, LHC jets and α S.

Applications of integrand reduction to two-loop five-point scattering amplitudes in QCD (2018)
Conference Proceeding
Badger, S., Bronnum-Hansen, C., Gehrmann, T., Hartanto, H. B., Henn, J., Lo Presti, A., & Peraro, T. (2018). Applications of integrand reduction to two-loop five-point scattering amplitudes in QCD. In Proceedings of Loops and Legs in Quantum Field Theory — PoS (LL2018) : 29 April 2018 - 04 May 2018, St. Goar, Germany. https://doi.org/10.22323/1.303.0006

We review the current state-of-the-art in integrand level reduction for five-point scattering amplitudes at two loops in QCD. We present some benchmark results for the evaluation of the leading colour two-loop five-gluon amploitudes in the physical r... Read More about Applications of integrand reduction to two-loop five-point scattering amplitudes in QCD.

Opto-mechanical designs for the HARMONI adaptive optics systems (2018)
Conference Proceeding
Dohlen, K., Morris, T., Piqueras Lopez, J., Calcines-Rosario, A., Costille, A., Dubbeldam, M., …Thatte, N. (2018). Opto-mechanical designs for the HARMONI adaptive optics systems. In L. M. Close, L. Schreiber, & D. Schmidt (Eds.), Proceedings Volume 10703, Adaptive Optics Systems VI. https://doi.org/10.1117/12.2313651

HARMONI is a visible and near-infrared integral field spectrograph equipped with two complementary adaptive optics systems, fully integrated within the instrument. A Single Conjugate AO (SCAO) system offers high performance for a limited sky coverage... Read More about Opto-mechanical designs for the HARMONI adaptive optics systems.

Phase A AO system design and performance for MOSAIC at the ELT (2018)
Conference Proceeding
Morris, T., Basden, A., Calcines-Rosario, A., Dohlen, K., Dubbeldam, C., El Hadi, K., …Younger, E. (2018). Phase A AO system design and performance for MOSAIC at the ELT. In L. M. Close, L. Schreiber, & D. Schmidt (Eds.), Proceedings Volume 10703, Adaptive Optics Systems VI. https://doi.org/10.1117/12.2313562

MOSAIC is a mixed-mode multiple object spectrograph planned for the ELT that uses a tiled focal plane to support a variety of observing modes. The MOSAIC AO system uses 4 LGS WFS and up to 4 NGS WFS positioned anywhere within the full 10 arcminute EL... Read More about Phase A AO system design and performance for MOSAIC at the ELT.

VIS: the visible imager for Euclid (2018)
Conference Proceeding
Cropper, M., Pottinger, S., Azzollini, R., Szafraniec, M., Awan, S., Mellier, Y., …Fazio, G. G. (2018). VIS: the visible imager for Euclid. In Space telescopes and instrumentation 2018 : optical, infrared, and millimeter wave. https://doi.org/10.1117/12.2315372

Euclid-VIS is the large format visible imager for the ESA Euclid space mission in their Cosmic Vision program, scheduled for launch in 2021. Together with the near infrared imaging within the NISP instrument, it forms the basis of the weak lensing me... Read More about VIS: the visible imager for Euclid.

New opportunities of freeform gratings using diamond machining (2018)
Conference Proceeding
Bourgenot, C., Calcines, A., & Sharples, R. M. (2018). New opportunities of freeform gratings using diamond machining. In R. Navarro, & R. Geyl (Eds.), Proceedings Volume 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III. https://doi.org/10.1117/12.2312040

With the recent development of new ultra fine aluminium alloys and progress in the field of directly machined freeform surfaces, diamond machined freeform gratings could play an important part in future spectrographs or integral field units, particul... Read More about New opportunities of freeform gratings using diamond machining.

MOSAIC optical relay module: optical design, performance, and flexure analysis (2018)
Conference Proceeding
Calcines, A., Dubbeldam, M., Morris, T. J., Fitzsimons, E., Schnetler, H., Cohen, M., & Amans, J. (2018). MOSAIC optical relay module: optical design, performance, and flexure analysis. In C. J. Evans, L. Simard, & H. Takami (Eds.), Proceedings Volume 10702, Ground-based and Airborne Instrumentation for Astronomy VII. https://doi.org/10.1117/12.2313481

The Optical Relay Module of the MOSAIC multiple-object spectrograph is used to relay 400-1800nm light picked off from the ELT focal plane to either a fibre-based integral field unit or a natural guide star wavefront sensor. Here we present the prelim... Read More about MOSAIC optical relay module: optical design, performance, and flexure analysis.

The reformatting advantage: photonics vs conventional optics! (2018)
Conference Proceeding
Calcines, A., Harris, R. J., Haynes, R., & Haynes, D. (2018). The reformatting advantage: photonics vs conventional optics!. In R. Navarro, & R. Geyl (Eds.), Proceedings Volume 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III. https://doi.org/10.1117/12.2312110

In recent decades, spectroscopic capabilities have been significantly enhanced by new technological developments, in particular spatial reformatting. Spatial reformatting allows multiple functionalities: the observation of a larger area of sky, obtai... Read More about The reformatting advantage: photonics vs conventional optics!.

Design of freeform diffraction gratings: performance, limitations and potential applications (2018)
Conference Proceeding
Calcines, A., Bourgenot, C., & Sharples, R. M. (2018). Design of freeform diffraction gratings: performance, limitations and potential applications. In R. Navarro, & R. Geyl (Eds.), Proceedings Volume 10706, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation III. https://doi.org/10.1117/12.2312125

Spectroscopy is a key technique in astronomy and nowadays most major telescopes include at least one spectrograph in their instrument suite. The dispersive element is one of the most important components and it defines the pupil size, spectral resolu... Read More about Design of freeform diffraction gratings: performance, limitations and potential applications.

Auto-tuned thermal control on stratospheric balloon experiments (2018)
Conference Proceeding
Redmond, S., Benton, S., Brown, A., Clark, P., Damaren, C., Eifler, T., …Tam, S. (2018). Auto-tuned thermal control on stratospheric balloon experiments. In H. K. Marshall, J. Spyromilio, & R. Gilmozzi (Eds.), Ground-based and Airborne Telescopes VII : 10–15 June 2018, Austin, Texas, United States ; proceedings. https://doi.org/10.1117/12.2312339

Balloon-borne experiments present unique thermal design challenges, which are a combination of those present for both space and ground experiments. Radiation and conduction are the predominant heat transfer mechanisms with convection effects being mi... Read More about Auto-tuned thermal control on stratospheric balloon experiments.

Overview, design, and flight results from SuperBIT: a high-resolution, wide-field, visible-to-near-UV balloon-borne astronomical telescope (2018)
Conference Proceeding
Romualdez, L., Benton, S., Brown, A., Clark, P., Damaren, C., Eifler, T., …Tam, S. (2018). Overview, design, and flight results from SuperBIT: a high-resolution, wide-field, visible-to-near-UV balloon-borne astronomical telescope. In H. Takami, C. J. Evans, & L. Simard (Eds.), Proceedings of SPIE, Ground-based and Airborne Instrumentation for Astronomy VII. https://doi.org/10.1117/12.2307754

Balloon-borne astronomy is a unique tool that allows for a level of image stability and significantly reduced atmospheric interference without the often prohibitive cost and long development time-scale that are characteristic of space-borne facility-... Read More about Overview, design, and flight results from SuperBIT: a high-resolution, wide-field, visible-to-near-UV balloon-borne astronomical telescope.

Leptogenesis via varying Weinberg operator (2018)
Conference Proceeding
Pascoli, S., Turner, J., Zhou, Y., Checchia, P., Mezzetto, M., Salente, G., …Canton, L. (2018). Leptogenesis via varying Weinberg operator. . https://doi.org/10.22323/1.314.0149

The Weinberg operator is a well-known solution to explain light neutrino masses. This operator violates lepton number and can provide non-equilibrium dynamics in the early Universe due to the suppression of tiny neutrino masses. A lot of underlying s... Read More about Leptogenesis via varying Weinberg operator.

Static and Fluctuating Magnetic Moments in the Ferroelectric Metal LiOsO3 (2018)
Conference Proceeding
Kirschner, F. K., Lang, F., Pratt, F. L., Lancaster, T., Shi, Y., Guo, Y., …Blundell, S. J. (2018). Static and Fluctuating Magnetic Moments in the Ferroelectric Metal LiOsO3. In Proceedings of the 14th International Conference on Muon Spin Rotation, Relaxation and Resonance (μSR2017). https://doi.org/10.7566/jpscp.21.011013

LiOsO3 is the first example of a new class of material called a ferroelectric metal. We performed zero-field and longitudinal-field μSR, along with a combination of electronic structure and dipole field calculations, to determine the magneticground s... Read More about Static and Fluctuating Magnetic Moments in the Ferroelectric Metal LiOsO3.