Results 31 to 40 of about 91,619 (296)
Public Release of RELXILL_NK: A Relativistic Reflection Model for Testing Einstein's Gravity [PDF]
, 2019 We present the public release version of relxill_nk, an X-ray reflection model for testing the Kerr hypothesis and general relativity. This model extends the relxill model that assumes the black hole spacetime is described by the Kerr metric.
Abdikamalov, Askar B. +5 more
core +3 more sources
Ray-tracing and physical-optics analysis of the aperture efficiency in a radio telescope [PDF]
Applied Optics, 2007 34 pages, 7 ...
Olmi, Luca, Bolli, Pietro
openaire +3 more sources
, 2015 We have developed a non-sequential ray-tracing simulation library, ROOT-based simulator for ray tracing (ROBAST), which is aimed to be widely used in optical simulations of cosmic-ray (CR) and gamma-ray telescopes.
Noda, Koji +2 more
core +1 more source
A rasterization-based ray-tracing method for laser–plasma interactions
High Power Laser Science and EngineeringThis paper introduces a novel ray-tracing methodology for various gradient-index materials, particularly plasmas. The proposed approach utilizes adaptive-step Runge–Kutta integration to compute ray trajectories while incorporating an innovative ...
Tao Tao +10 more
doaj +1 more source
Integrated modelling and simulation of NiTi alloy by powder bed fusion: Single track study
Materials & Design, 2023 In-depth understanding of the layer-by-layer process is critical for the quality control of additive manufactured (AM) components. Besides the development of experimental techniques, computational modelling is another important way to study the AM ...
Liang-Xing Lu +8 more
doaj +1 more source
The lower hybrid wave cutoff: A case study in eikonal methods
, 2010 Eikonal, or ray tracing, methods are commonly used to estimate the propagation of radio frequency fields in plasmas. While the information gained from the rays is quite useful, an approximate solution for the fields would also be valuable, e.g., for ...
Bonoli, P. T. +2 more
core +1 more source
Evaluation of DIII-D plasmas for Future Measurements of the Driven Current Density in the DIII-D High Field Side Lower Hybrid Experiment [PDF]
EPJ Web of ConferencesHigh field side (HFS) lower hybrid current drive (LHCD) is a promising method for efficiently driving off-axis current in steady state tokamak power plants. The first test of this technology is underway at the DIII-D tokamak.
Rutherford Grant +10 more
doaj +1 more source
Communications Physics, 2023 Particle-in-cell (PIC) simulations are a widely-used tool to model kinetics-dominated plasmas in ultrarelativistic laser-solid interactions (dimensionless vectorpotential a 0 > 1). However, interactions approaching subrelativistic laser intensities (a 0 ≲
Long Yang +13 more
doaj +1 more source
Illustrating Physics with Ray-Traced Computer Graphics
The Physics Teacher, 2006 This paper provides a brief introduction to using ray-traced computer graphics for creating illustrations to be used in physics teaching. The article focuses on Povray, a freely available ray-tracing software program. We have found that a ray-traced illustration produced with this software provides a final-image quality that is far superior to hand ...
openaire +3 more sources
Benchmark problems for continuum radiative transfer. High optical depths, anisotropic scattering, and polarisation [PDF]
, 2009 Solving the continuum radiative transfer equation in high opacity media requires sophisticated numerical tools. In order to test the reliability of such tools, we present a benchmark of radiative transfer codes in a 2D disc configuration.
A. M. Watson +42 more
core +6 more sources