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File indexing completed on 2025-09-19 08:49:41
0001 //------------------------------- -*- C++ -*- -------------------------------// 0002 // Copyright Celeritas contributors: see top-level COPYRIGHT file for details 0003 // SPDX-License-Identifier: (Apache-2.0 OR MIT) 0004 //---------------------------------------------------------------------------// 0005 //! \file celeritas/alongstep/detail/MscApplier.hh 0006 //---------------------------------------------------------------------------// 0007 #pragma once 0008 0009 #include "celeritas/global/CoreTrackView.hh" 0010 0011 namespace celeritas 0012 { 0013 namespace detail 0014 { 0015 //---------------------------------------------------------------------------// 0016 /*! 0017 * Apply multiple scattering. 0018 * 0019 * This does three key things: 0020 * - Replaces the "geometrical" step (continuous) with the "physical" step 0021 * (including multiple scattering) 0022 * - Likely changes the direction of the track 0023 * - Possibly displaces the particle 0024 */ 0025 template<class MH> 0026 struct MscApplier 0027 { 0028 inline CELER_FUNCTION void operator()(CoreTrackView const& track); 0029 0030 MH msc; 0031 }; 0032 0033 //---------------------------------------------------------------------------// 0034 // DEDUCTION GUIDES 0035 //---------------------------------------------------------------------------// 0036 template<class MH> 0037 CELER_FUNCTION MscApplier(MH&&) -> MscApplier<MH>; 0038 0039 //---------------------------------------------------------------------------// 0040 // INLINE DEFINITIONS 0041 //---------------------------------------------------------------------------// 0042 template<class MH> 0043 CELER_FUNCTION void MscApplier<MH>::operator()(CoreTrackView const& track) 0044 { 0045 if (track.sim().status() != TrackStatus::alive) 0046 { 0047 // Active track killed during propagation or erroneous: don't apply MSC 0048 return; 0049 } 0050 0051 if (track.physics_step().msc_step().geom_path > 0) 0052 { 0053 // Scatter the track and transform the "geometrical" step back to 0054 // "physical" step 0055 msc.apply_step(track); 0056 } 0057 } 0058 0059 //---------------------------------------------------------------------------// 0060 } // namespace detail 0061 } // namespace celeritas
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