DiRAC: Memory Intensive 2.5y
Lead Research Organisation:
Durham University
Department Name: Physics
Abstract
Physicists across the astronomy, nuclear and particle physics communities are focussed on understanding how the Universe works at a very fundamental level. The distance scales with which they work vary by 50 orders of magnitude from the smallest distances probed by experiments at the Large Hadron Collider, deep within the atomic nucleus, to the largest scale galaxy clusters discovered out in space. The Science challenges, however, are linked through questions such as: How did the Universe begin and how is it evolving? and What are the fundamental constituents and fabric of the Universe and how do they interact?
Progress requires new astronomical observations and experimental data but also new theoretical insights. Theoretical understanding comes increasingly from large-scale computations that allow us to confront the consequences of our theories very accurately with the data or allow us to interrogate the data in detail to extract information that has impact on our theories. These computations test the fastest computers that we have and push the boundaries of technology in this sector. They also provide an excellent environment for training students in state-of-the-art techniques for code optimisation and data mining and visualisation.
The DiRAC2 HPC facility has been operating since 2012, providing computing resources for theoretical research in all areas of particle physics, astronomy, cosmology and nuclear physics supported by STFC. It is a highly productive facility, generating 200-250 papers annually in international, peer-reviewed journals. However, the DiRAC facility risks becoming uncompetitive as it has remained static in terms of overall capability since 2012. The DiRAC-2.5x investment in 2017/18 mitigated the risk of hardware failures, by replacing our oldest hardware components. However, as the factor 5 oversubscription of the most recent RAC call demonstrated, the science programme in 2019/20 and beyond requires a significant uplift in DiRAC's compute capability. The main purpose of the requested funding for the DiRAC2.5y project is to provide a factor 2 increase in computing across all DiRAC services to enable the facility to remain competitive during 2019/20 in anticipation of future funding for DiRAC-3.
DiRAC2.5y builds on the success of the DiRAC HPC facility and will provide the resources needed to support cutting-edge research during 2019 in all areas of science supported by STFC. While the funding is required to remain competitive, the science programme will continue to be world-leading. Examples of the projects which will benefit from this investment include:
(i) lattice quantum chromodynamics (QCD) calculations of the properties of fundamental particles from first principles;
(ii) improving the potential of experiments at CERN's Large Hadron Collider for discovery of new physics by increasing the accuracy of theoretical predictions for rare processes involving the fundamental constituents of matter known as quarks;
(iii) simulations of the merger of pairs of black holes and which generate gravitational waves such as those recently discovered by the LIGO consortium;
(iv) the most realistic simulations to date of the formation and evolution of galaxies in the Universe;
(v) the accretion of gas onto supermassive black holes, the most efficient means of extracting energy from matter and the engine which drives galaxy evolution; (vi) new models of our own Milky Way galaxy calibrated using new data from the European Space Agency's GAIA satellite; (vii) detailed simulations of the interior of the sun and of planetary interiors; (viii) the formation of stars in clusters - for the first time it will be possible to follow the formation of massive stars.
Progress requires new astronomical observations and experimental data but also new theoretical insights. Theoretical understanding comes increasingly from large-scale computations that allow us to confront the consequences of our theories very accurately with the data or allow us to interrogate the data in detail to extract information that has impact on our theories. These computations test the fastest computers that we have and push the boundaries of technology in this sector. They also provide an excellent environment for training students in state-of-the-art techniques for code optimisation and data mining and visualisation.
The DiRAC2 HPC facility has been operating since 2012, providing computing resources for theoretical research in all areas of particle physics, astronomy, cosmology and nuclear physics supported by STFC. It is a highly productive facility, generating 200-250 papers annually in international, peer-reviewed journals. However, the DiRAC facility risks becoming uncompetitive as it has remained static in terms of overall capability since 2012. The DiRAC-2.5x investment in 2017/18 mitigated the risk of hardware failures, by replacing our oldest hardware components. However, as the factor 5 oversubscription of the most recent RAC call demonstrated, the science programme in 2019/20 and beyond requires a significant uplift in DiRAC's compute capability. The main purpose of the requested funding for the DiRAC2.5y project is to provide a factor 2 increase in computing across all DiRAC services to enable the facility to remain competitive during 2019/20 in anticipation of future funding for DiRAC-3.
DiRAC2.5y builds on the success of the DiRAC HPC facility and will provide the resources needed to support cutting-edge research during 2019 in all areas of science supported by STFC. While the funding is required to remain competitive, the science programme will continue to be world-leading. Examples of the projects which will benefit from this investment include:
(i) lattice quantum chromodynamics (QCD) calculations of the properties of fundamental particles from first principles;
(ii) improving the potential of experiments at CERN's Large Hadron Collider for discovery of new physics by increasing the accuracy of theoretical predictions for rare processes involving the fundamental constituents of matter known as quarks;
(iii) simulations of the merger of pairs of black holes and which generate gravitational waves such as those recently discovered by the LIGO consortium;
(iv) the most realistic simulations to date of the formation and evolution of galaxies in the Universe;
(v) the accretion of gas onto supermassive black holes, the most efficient means of extracting energy from matter and the engine which drives galaxy evolution; (vi) new models of our own Milky Way galaxy calibrated using new data from the European Space Agency's GAIA satellite; (vii) detailed simulations of the interior of the sun and of planetary interiors; (viii) the formation of stars in clusters - for the first time it will be possible to follow the formation of massive stars.
Planned Impact
The anticipated impact of the DiRAC2.5y HPC facility aligns closely with the recently published UK Industrial Strategy. As such, many of our key impacts will be driven by our engagements with industry. Each service provider for DiRAC2.5y has a local industrial strategy to deliver increased levels of industrial returns over the next three years. The "Pathways to impact" document which is attached to the lead (Leicester) proposal describes the overall industrial strategy for the DiRAC facility, including our strategic goals and key performance indicators.
Organisations
Publications
Vernon I
(2022)
Bayesian emulation and history matching of JUNE.
in Philosophical transactions. Series A, Mathematical, physical, and engineering sciences
Pezzella M
(2021)
A method for calculating temperature-dependent photodissociation cross sections and rates.
in Physical chemistry chemical physics : PCCP
Clark VHJ
(2021)
Modelling the non-local thermodynamic equilibrium spectra of silylene (SiH2).
in Physical chemistry chemical physics : PCCP
Semenov M
(2021)
Rovibronic spectroscopy of PN from first principles.
in Physical chemistry chemical physics : PCCP
Bertulani C
(2021)
Examination of the sensitivity of quasifree reactions to details of the bound-state overlap functions
in Physical Review C
Linh B
(2021)
Investigation of the ground-state spin inversion in the neutron-rich Cl 47 , 49 isotopes
in Physical Review C
Arthuis P
(2023)
Quantum Monte Carlo calculations in configuration space with three-nucleon forces
in Physical Review C
Parrott W
(2021)
Toward accurate form factors for B -to-light meson decay from lattice QCD
in Physical Review D
Bernal N
(2022)
Rescuing high-scale leptogenesis using primordial black holes
in Physical Review D
Radia M
(2021)
Anomalies in the gravitational recoil of eccentric black-hole mergers with unequal mass ratios
in Physical Review D
Cheek A
(2023)
Evaporation of primordial black holes in the early Universe: Mass and spin distributions
in Physical Review D
Chakraborty B
(2021)
Improved V c s determination using precise lattice QCD form factors for D ? K l ?
in Physical Review D
Macpherson H
(2021)
Luminosity distance and anisotropic sky-sampling at low redshifts: A numerical relativity study
in Physical Review D
Cooper L
(2022)
Form factors for the processes B c + ? D 0 l + ? l and B c + ? D s + l + l - ( ? ? ¯ ) from lattice QCD
in Physical Review D
Evstafyeva T
(2023)
Measuring the ringdown scalar polarization of gravitational waves in Einstein-scalar-Gauss-Bonnet gravity
in Physical Review D
Bamber J
(2021)
Growth of accretion driven scalar hair around Kerr black holes
in Physical Review D
Mosbech M
(2023)
Gravitational-wave event rates as a new probe for dark matter microphysics
in Physical Review D
Kalaghatgi C
(2021)
Investigating the effect of in-plane spin directions for precessing binary black hole systems
in Physical Review D
Cheek A
(2022)
Redshift effects in particle production from Kerr primordial black holes
in Physical Review D
Bennett E
(2021)
Glueballs and strings in S p ( 2 N ) Yang-Mills theories
in Physical Review D
Hatton D
(2021)
Bottomonium precision tests from full lattice QCD: Hyperfine splitting, ? leptonic width, and b quark contribution to e + e - ? hadrons
in Physical Review D
Hatton D
(2021)
Determination of m ¯ b / m ¯ c and m ¯ b from n f = 4 lattice QCD + QED
in Physical Review D
Traykova D
(2021)
Dynamical friction from scalar dark matter in the relativistic regime
in Physical Review D
Bamber J
(2021)
Quasinormal modes of growing dirty black holes
in Physical Review D
Hamilton E
(2024)
Catalog of precessing black-hole-binary numerical-relativity simulations
in Physical Review D
Bamber J
(2023)
Black hole merger simulations in wave dark matter environments
in Physical Review D
Buividovich P
(2020)
Electric conductivity in finite-density S U ( 2 ) lattice gauge theory with dynamical fermions
in Physical Review D
Macpherson H
(2021)
Erratum: Luminosity distance and anisotropic sky-sampling at low redshifts: A numerical relativity study [Phys. Rev. D 104 , 023525 (2021)]
in Physical Review D
Buividovich P
(2021)
Numerical study of the chiral separation effect in two-color QCD at finite density
in Physical Review D
Hamilton E
(2023)
Ringdown frequencies in black holes formed from precessing black-hole binaries
in Physical Review D
Aurrekoetxea J
(2023)
Oscillon formation during inflationary preheating with general relativity
in Physical Review D
Leo M
(2019)
High-redshift test of gravity using enhanced growth of small structures probed by the neutral hydrogen distribution
in Physical Review D
Brady S
(2023)
Solving the initial conditions problem for modified gravity theories
in Physical Review D
Silva HO
(2021)
Dynamical Descalarization in Binary Black Hole Mergers.
in Physical review letters
Fowlie A
(2022)
Nested Sampling for Frequentist Computation: Fast Estimation of Small p-Values.
in Physical review letters
Aylett-Bullock J
(2021)
Operational response simulation tool for epidemics within refugee and IDP settlements: A scenario-based case study of the Cox's Bazar settlement.
in PLoS computational biology
Buividovich P.
(2023)
Quantum chaos in supersymmetric Yang-Mills-like model: equation of state, entanglement, and spectral form-factors
in Proceedings of Science
Chan T
(2023)
Simulations of the reionization of the clumpy intergalactic medium with a novel particle-based two-moment radiative transfer scheme
in Proceedings of the International Astronomical Union
Aylett-Bullock J
(2021)
June: open-source individual-based epidemiology simulation.
in Royal Society open science
Walker J
(2023)
A mixed-method approach to determining contact matrices in the Cox's Bazar refugee settlement.
in Royal Society open science
Yardley S
(2021)
Simulating the Coronal Evolution of Bipolar Active Regions to Investigate the Formation of Flux Ropes
in Solar Physics
Threlfall J
(2021)
Can Multi-threaded Flux Tubes in Coronal Arcades Support a Magnetohydrodynamic Avalanche?
in Solar physics
Mellor T
(2021)
Artificial Symmetries for Calculating Vibrational Energies of Linear Molecules
in Symmetry
Norman S
(2021)
Stars Crushed by Black Holes. I. On the Energy Distribution of Stellar Debris in Tidal Disruption Events
in The Astrophysical Journal
Huang J
(2023)
Global 3D Radiation Magnetohydrodynamic Simulations of Accretion onto a Stellar-mass Black Hole at Sub- and Near-critical Accretion Rates
in The Astrophysical Journal
Raj A
(2021)
Disk Tearing: Implications for Black Hole Accretion and AGN Variability
in The Astrophysical Journal
Pagano P
(2019)
A Prospective New Diagnostic Technique for Distinguishing Eruptive and Noneruptive Active Regions
in The Astrophysical Journal
Ying B
(2019)
First Determination of 2D Speed Distribution within the Bodies of Coronal Mass Ejections with Cross-correlation Analysis
in The Astrophysical Journal
Kobayashi C
(2020)
The Origin of Elements from Carbon to Uranium
in The Astrophysical Journal