Richard Vasques


Assistant Professor of Nuclear Engineering

Publications


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Preprints


An improved spectral approach for solving the nonclassical neutron particle transport equation


Leonardo R.C. Moraes, Japan K. Patel, Ricardo C. Barros, Richard Vasques


https://arxiv.org/abs/2108.10782, 2021


On the application of the analytical discrete ordinates method to the solution of nonclassical transport problems in slab geometry


Leonardo R. C. Moraes, Liliane B. Barichello, Ricardo C. Barros, Richard Vasques


https://arxiv.org/abs/2106.13149, 2021


The nonclassical simplified P2 and P3 equations with anisotropic scattering


Robert K. Palmer, Richard Vasques


To appear in Proceedings of International Conference on Mathematics & Computational Methods Applied to Nuclear Science & Engineering, Raleigh, NC, 2021 Oct



Journal Publications


[J16] Transport synthetic acceleration for the solution of the one-speed nonclassical spectral SN equations in slab geometry


Japan K. Patel, Leonardo R. C. Moraes, Richard Vasques, Ricardo C. Barros


Journal of Computational and Applied Mathematics, vol. 401(-), 2022 , p. 113768


[J15] Modified Fokker-Planck acceleration for forward-peaked transport problems in slab geometry


John J. Kuczek, Japan K. Patel, Richard Vasques


Journal of Computational and Theoretical Transport, vol. 50(5), 2021, pp. 430-453


[J14] A spectral approach for solving the nonclassical transport equation


Richard Vasques, Leonardo R. C. Moraes, Ricardo Carvalho de Barros, Rachel N. Slaybaugh


Journal of Computational Physics, vol. 402(-), 2020, p. 109078


[J13] Asymptotic derivation of the simplified PN equations for nonclassical transport with anisotropic scattering


Robert K. Palmer, Richard Vasques


Journal of Computational and Theoretical Transport, vol. 49(7), 2020, pp. 331-348


[J12] Exact transport representations of the classical and nonclassical simplified PN equations


Ilker Makine, Richard Vasques, Rachel N. Slaybaugh


Journal of Computational and Theoretical Transport, vol. 47(4-6), 2018, pp. 326-349


[J11] Nonclassical particle transport in one-dimensional random periodic media


Richard Vasques, Kai Krycki, Rachel N. Slaybaugh


Nuclear Science and Engineering, vol. 185(1), 2017, pp. 78-106


[J10] A nonstiff solution for the stochastic neutron point kinetics equations


Milena Wollmann da Silva, Richard Vasques, Bardo E. J. Bodmann, Marco T. Vilhena


Annals of Nuclear Energy, vol. 97(-), 2016, pp. 47-52


[J9] The nonclassical diffusion approximation to the nonclassical linear Boltzmann equation


Richard Vasques


Applied Mathematics Letters, vol. 53(-), 2016, pp. 63-68


[J8] The nonclassical Boltzmann equation and diffusion-based approximations to the Boltzmann equation


Martin Frank, Kai Krycki, Edward W. Larsen, Richard Vasques


Siam Journal on Applied Mathematics, vol. 75(3), 2015, pp. 1329-1345


[J7] Adjusted Levermore–Pomraning equations for diffusive random systems in slab geometry


Richard Vasques, Nitin K. Yadav


Journal of Quantitative Spectroscopy & Radiative Transfer, vol. 154(-), 2015, pp. 98-112


[J6] Non-classical particle transport with angular-dependent path-length distributions. II: Application to pebble bed reactor cores


Richard Vasques, Edward W. Larsen


Annals of Nuclear Energy, vol. 70(-), 2014, pp. 301-311


[J5] Non-classical particle transport with angular-dependent path-length distributions. I: Theory


Richard Vasques, Edward W. Larsen


Annals of Nuclear Energy, vol. 70(-), 2014, pp. 292-300


[J4] Nuclear energy is renewable energy


Richard Vasques


Energy Research Journal, vol. 5(2), 2014 Nov, pp. 33-34


[J3] A generalized linear Boltzmann equation for non-classical particle transport


Edward W. Larsen, Richard Vasques


Journal of Quantitative Spectroscopy & Radiative Transfer, vol. 112(4), 2011, pp. 619-631


[J2] Uma nova versão do método LTAN


Augusto V. Cardona, Richard Vasques, Marco T. Vilhena


TEMA: Trends in Computational and Applied Mathematics, vol. 5(1), 2004, pp. 49-54


[J1] Simulação da dispersão de poluentes em meio aquático usando álgebra de Lie


Jorge R. Zabadal, Richard Vasques, Anelise Haag, Cynthia F. Segatto


Ciência e Natura, Special(-), 2002, pp. 145-156



Refereed Conference Proceedings


[P31] One-way coupled tumor response model for combined-hyperthermia-radiotherapy treatment with anisotropic scattering


Japan K. Patel, John J. Kuczek, Richard Vasques


Transactions of the American Nuclear Society, vol. 121(1), 2019, pp. 65-68


[P30] One-way coupled benchmark for combined-hyperthermia- radiotherapy treatment in slab geometry


Barry D. Ganapol, Japan K. Patel, Richard Vasques


Proceedings of 26th ICTT: International Conference on Transport Theory, Paris, France, 2019 Sep


[P29] Nonlinear Fokker-Planck acceleration for forward-peaked transport problems in slab geometry


Japan K. Patel, John. J. Kuczek, Richard Vasques


Proceedings of 26th ICTT: International Conference on Transport Theory, Paris, France, 2019 Sep


[P28] P1 synthetic acceleration for nonclassical spectral SN equations in slab geometry


Japan K. Patel, Leonardo R. C. Moraes, Richard Vasques, Ricardo C. Barros


Proceedings of 26th ICTT: International Conference on Transport Theory, Paris, France, 2019 Sep


[P27] A nonclassical Monte Carlo algorithm for transport problems in diffusive binary stochastic media


Richard Vasques, Patrick S. Brantley, Robert K. Palmer


Proceedings of 26th ICTT: International Conference on Transport Theory, Paris, France, 2019 Sep


[P26] Asymptotic derivation of the simplified PN equations for nonclassical transport with anisotropic scattering


Robert K. Palmer, Richard Vasques


Proceedings of 26th ICTT: International Conference on Transport Theory, Paris, France, 2019 Sep


[P25] Towards a multiphysics model for tumor response to combined-hyperthermia-radiotherapy treatment


Japan K. Patel, Richard Vasques, Barry D. Ganapol


Proceedings of International Conference on Mathematics & Computational Methods Applied to Nuclear Science & Engineering, Portland, OR, 2019 Aug


[P24] Solver recommendation for transport problems in slabs using machine learning


Jinzhao Chen, Japan K. Patel, Richard Vasques


Proceedings of International Conference on Mathematics & Computational Methods Applied to Nuclear Science & Engineering, Portland, OR, 2019 Aug


[P23] Exact transport representations of the classical and nonclassical simplified PN equations


Ilker Makine, Richard Vasques, Rachel N. Slaybaugh


Proceedings of 25th ICTT: International Conference on Transport Theory, Monterey, CA, 2017 Oct


[P22] A generalized volume rendering approach for computer graphics


Magnus Wrenninge, Richard Vasques, Rachel N. Slaybaugh


Proceedings of 25th ICTT: International Conference on Transport Theory, Monterey, CA, 2017 Oct


[P21] Simplified PN equations for nonclassical transport with isotropic scattering


Richard Vasques, Rachel N. Slaybaugh


Proceedings of International Conference on Mathematics & Computational Methods Applied to Nuclear Science & Engineering, Jeju, South Korea, 2017 Apr


[P20] Nonclassical particle transport in the 1-D diffusive limit


Richard Vasques, Rachel N. Slaybaugh, Kai Krycki


Transactions of the American Nuclear Society, vol. 114(1), 2016, pp. 361-364


[P19] The solution of the neutron point kinetics equation with stochastic extension: an analysis of two moments


Milena Wollmann da Silva, Bardo E. J. Bodmann, Marco T. Vilhena, Richard Vasques


Proceedings of 7th INAC: International Nuclear Atlantic Conference, São Paulo, Brazil, 2015 Oct


[P18] Boundary conditions for the 1-D non-classical transport equation


Richard Vasques, Kai Krycki


Proceedings of 24th ICTT: International Conference on Transport Theory, Taormina, Italy, 2015 Sep


[P17] On the accuracy of the non-classical transport equation in 1- D random periodic media


Richard Vasques, Kai Krycki


Proceedings of Joint International Conference on Mathematics and Computation, Supercomputing in Nuclear Applications and the Monte Carlo Method, Nashville, TN, 2015 Apr


[P16] Fast neutron imaging with an aSi detector for nuclear waste assay


Manuel Schumann, Ralf Engels, Martin Frank, Julia Furletova, Sergey Furletov, Andreas Havenith, Günter Kemmerling, John Kettler, Thorwald Klapdor-Kleingrothaus, Eric Mauerhofer, Oliver Schitthelm, Richard Vasques, D. Voß, Martin Willenbockel


Proceedings of 25th SAAGAS: Seminar on Activation Analysis and Gamma Spectroscopy, Aachen, Germany, 2015 Feb


[P15] Detector development for neutron imaging system for radioactive-waste analysis (NISRA) with 14 MeV neutrons


Manuel Schumann, Ralf Engels, Martin Frank, Julia Furletova, Andreas Havenith, Günter Kemmerling, John Kettler, Eric Mauerhofer, Oliver Schitthelm, Richard Vasques


Proceedings of 10th World Conference on Neutron Radiography, Grindelwald, Switzerland, 2014 Oct


[P14] Compact neutron imaging system for radioactive-waste analysis (NISRA)


Ralf Engels, Martin Frank, Julia Furletova, Andreas Havenith, Günter Kemmerling, John Kettler, Eric Mauerhofer, Oliver Schitthelm, Manuel Schumann, Richard Vasques, D. Voß


Proceedings of 10th World Conference on Neutron Radiography, Grindelwald, Switzerland, 2014 Oct


[P13] Monte-Carlo application for nondestructive nuclear waste analysis


Manuel Schumann, Ralf Engels, Martin Frank, Sergey Furletov, Julia Furletova, Christoph Genreith, Andreas Havenith, Günter Kemmerling, John Kettler, Thomas Krings, Eric Mauerhofer, Daniel Neike, Matthias Rossbach, Oliver Schitthelm, Richard Vasques, Cédric Carasco, Emmanuel Payan, Bertrand Perot, Jean-Luc Ma


Proceedings of Joint International Conference on Supercomputing in Nuclear Applications + Monte Carlo, Paris, France, 2013 Oct


[P12] Compact neutron imaging system for the investigation of large and dense objects


John Kettler, Andreas Havenith, Daniel Neike, Eric Mauerhofer, Günter Kemmerling, Julia Furletova, Manuel Schumann, Martin Frank, Oliver Schitthelm, Ralf Engels, Richard Vasques, Sergey Furletov


Proceedings of 1st NINMACH: International Conference on Neutron Imaging and Neutron Methods in Archaeology and Cultural Heritage Research, Garching, Germany, 2013 Sep


[P11] Numerical schemes for a non-classical linear Boltzmann equation for transport through spatially correlated media


Kai Krycki, Richard Vasques


Proceedings of NumHyp: Numerical approximations of hyperbolic systems with source terms and applications, Aachen, Germany, 2013 Sep


[P10] Zerstoerungsfreie Charakterisierung Radioaktiver Abfaelle


Manuel Schumann, Ralf Engels, Martin Frank, Sergey Furletov, Julia Furletova, Christoph Genreith, Andreas Havenith, Günter Kemmerling, John Kettler, Thomas Krings, Eric Mauerhofer, Daniel Neike, Matthias Rossbach, Oliver Schitthelm, Richard Vasques, Cédric Carasco, Emmanuel Payan, Bertrand Perot, Jean-Luc Ma


VKTA Workshop: Huerden und Fallstricke bei der Charakterisierung von Abfall-Gebinden, Dresden, Germany, 2013 Jun


[P9] Estimating anisotropic diffusion of neutrons near the boundary of a pebble bed random system


Richard Vasques


Proceedings of International Conference on Mathematics and Computational Methods Applied to Nuclear Science & Engineering, Sun Valley, ID, 2013 May


[P8] Neutron imaging system for radioactive-waste analysis


Ralf Engels, Martin Frank, Sergey Furletov, Julia Furletova, Andreas Havenith, Günter Kemmerling, John Kettler, Eric Mauerhofer, Daniel Neike, Oliver Schitthelm, Manuel Schumann, Richard Vasques


Proceedings of 24th SAAGAS: Seminar on Activation Analysis and Gamma Spectroscopy, Munich, Germany, 2013 Feb


[P7] Anisotropic diffusion in model 2-D pebble-bed reactor cores


Richard Vasques, Edward W. Larsen


Proceedings of International Conference on Advances in Mathematics, Computational Methods, and Reactor Physics, Saratoga Springs, NY, 2009 May


[P6] Particle transport in the 1-D diffusive atomic mix limit


Edward W. Larsen, Richard Vasques, Marco T. Vilhena


Proceedings of Mathematics and Computation, Supercomputing, Reactor Physics and Nuclear and Biological Applications, Avignon, France, 2005 Sep


[P5] State of the art of particle transport theory in stochastic media


Richard Vasques, Marco T. Vilhena, Mark Thompson, Edward W. Larsen


Proceedings of XXV CILAMCE: Iberian Latin American Congress on Computational Methods in Engineering, Recife, Brazil, 2004 Nov


[P4] Aumentando a eficiência computacional do método LTAn


Augusto V. Cardona, Richard Vasques


Proceedings of XXVI CNMAC: Congresso Nacional de Matemática Aplicada e Computacional, São José do Rio Preto, Brazil, 2003 Sep


[P3] Solução LTAn para o problema de transporte em uma placa com uma fonte arbitrária e altas ordens de quadratura


Augusto V. Cardona, Richard Vasques, José V. P. Oliveira


Proceedings of XXVI CNMAC: Congresso Nacional de Matemática Aplicada e Computacional, São José do Rio Preto, Brazil, 2003 Sep


[P2] The one-dimensional LTAn solution in a slab with high order of quadrature


Augusto V. Cardona, Marco T. Vilhena, José V. P. Oliveira, Richard Vasques


Proceedings of 18th ICTT: International Conference on Transport Theory, Rio de Janeiro, Brazil, 2003 Jul


[P1] The LTSn solution for the neutron transport equation in spherical geometry


Richard Vasques, Cynthia F. Segatto, Marco T. Vilhena


Proceedings of 18th ICTT: International Conference on Transport Theory, Rio de Janeiro, Brazil, 2003 Jul



Book Chapter


[C1] Influence of stochastic moments in the solution of the neutron point kinetics equation


Milena Wollmann da Silva, Bardo E. J. Bodmann, Marco T. Vilhena, Richard Vasques


C. Constanda, A. Kirsch, Integral Methods in Science and Engineering, Springer: Birkhauser Basel, 2015, pp. 613-624