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Quasi-periodic X-ray eruptions years after a nearby tidal disruption event

Autor: Nicholl, M., Pasham, D. R., Mummery, A., Guolo, M., Gendreau, K., Dewangan, G. C., Ferrara, E. C., Remillard, R., Bonnerot, C., Chakraborty, J., Hajela, A., Dhillon, V. S., Gillan, A. F., Greenwood, J., Huber, M. E., Janiuk, A., Salvesen, G., van Velzen, S., Aamer, A., Alexander, K. D., Angus, C. R., Arzoumanian, Z., Auchettl, K., Berger, E., de Boer, T., Cendes, Y., Chambers, K. C., Chen, T. -W., Chornock, R., Fulton, M. D., Gao, H., Gillanders, J. H., Gomez, S., Gompertz, B. P., Fabian, A. C., Herman, J., Ingram, A., Kara, E., Laskar, T., Lawrence, A., Lin, C. -C., Lowe, T. B., Magnier, E. A., Margutti, R., McGee, S. L., Minguez, P., Moore, T., Nathan, E., Oates, S. R., Patra, K. C., Ramsden, P., Ravi, V., Ridley, E. J., Sheng, X., Smartt, S. J., Smith, K. W., Srivastav, S., Stein, R., Stevance, H. F., Turner, S. G. D., Wainscoat, R. J., Weston, J., Wevers, T., Young, D. R.

Quasi-periodic Eruptions (QPEs) are luminous bursts of soft X-rays from the nuclei of galaxies, repeating on timescales of hours to weeks. The mechanism behind these rare systems is uncertain, but most theories involve accretion disks around supermas

Externí odkaz: http://arxiv.org/abs/2409.02181

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Cross-disciplinary Reactor-to-Repository Framework for Evaluating Spent Nuclear Fuel from Advanced Reactors

Autor: Wainwright, Haruko M., Christiaen, Chloe, Atz, Milos, Tchakerian, John Sebastian, Yu, Jiankai, Ridley, Gavin Keith, Shirvan, Koroush

This study presents a cross-disciplinary reactor-to-repository framework to compare different advanced reactors with respect to their spent nuclear fuel (SNF). The framework consists of (1) OpenMC for simulating neutronics, fuel depletion, and radioa

Externí odkaz: http://arxiv.org/abs/2405.12805

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Performance Portable Monte Carlo Particle Transport on Intel, NVIDIA, and AMD GPUs

Autor: Tramm, John, Romano, Paul, Shriwise, Patrick, Lund, Amanda, Doerfert, Johannes, Steinbrecher, Patrick, Siegel, Andrew, Ridley, Gavin

OpenMC is an open source Monte Carlo neutral particle transport application that has recently been ported to GPU using the OpenMP target offloading model. We examine the performance of OpenMC at scale on the Frontier, Polaris, and Aurora supercompute

Externí odkaz: http://arxiv.org/abs/2403.12345

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The Monte Carlo Computational Summit -- October 25 & 26, 2023 -- Notre Dame, Indiana, USA

Autor: Morgan, Joanna Piper, Mote, Alexander, Pasmann, Samuel Lee, Ridley, Gavin, Palmer, Todd, Niemeyer, Kyle E., McClarren, Ryan

The Monte Carlo Computational Summit was held on the campus of the University of Notre Dame in South Bend, Indiana, USA on 25--26 October 2023. The goals of the summit were to discuss algorithmic and software alterations required for successfully por

Externí odkaz: http://arxiv.org/abs/2402.08161

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A Four-channel Optically Pumped Magnetometer for a Magnetoencephalography Sensor Array

Autor: Iivanainen, Joonas, Carter, Tony R., Dhombridge, Jonathan E., Read, Timothy S., Campbell, Kaleb, Abate, Quinn, Ridley, David M., Borna, Amir, Schwindt, Peter D. D.

We present a novel four-channel OPM sensor for magnetoencephalography that utilizes a two-color pump/probe scheme on a single optical axis. We characterize its performance across 18 built sensor modules. The new sensor implements several improvements

Externí odkaz: http://arxiv.org/abs/2312.14623

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Time and event symmetry in quantum mechanics

Autor: Ridley, Michael, Adlam, Emily

We investigate two types of temporal symmetry in quantum mechanics. The first type, time symmetry, refers to the inclusion of opposite time orientations on an equivalent physical footing. The second, event symmetry, refers to the inclusion of all tim

Externí odkaz: http://arxiv.org/abs/2312.13524

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