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| Original file line number | Diff line number | Diff line change |
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| /** Detray library, part of the ACTS project (R&D line) | ||
| * | ||
| * (c) 2024 CERN for the benefit of the ACTS project | ||
| * | ||
| * Mozilla Public License Version 2.0 | ||
| */ | ||
|
|
||
| // Project include(s). | ||
| #include "detray/materials/interaction.hpp" | ||
| #include "detray/materials/material.hpp" | ||
| #include "detray/materials/predefined_materials.hpp" | ||
|
|
||
| // Detray test include(s) | ||
| #include "detray/test/utils/types.hpp" | ||
|
|
||
| // GTest include(s). | ||
| #include <gtest/gtest.h> | ||
|
|
||
| using namespace detray; | ||
|
|
||
| // Test class for the stopping power | ||
| // Input tuple: < material, particle type, kinetic energy, expected output > | ||
| class StoppingPowerValidation | ||
| : public ::testing::TestWithParam< | ||
| std::tuple<material<scalar>, pdg_particle<scalar>, scalar, scalar>> { | ||
| }; | ||
|
|
||
| TEST_P(StoppingPowerValidation, stopping_power) { | ||
|
|
||
| // Interaction object | ||
| interaction<scalar> I; | ||
|
|
||
| // Material | ||
| material<scalar> mat = std::get<0>(GetParam()); | ||
|
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||
| // Particle | ||
| pdg_particle<scalar> ptc = std::get<1>(GetParam()); | ||
|
|
||
| // Kinetic energy | ||
| const scalar T = std::get<2>(GetParam()); | ||
|
|
||
| // Total energy | ||
| const scalar E = T + ptc.mass(); | ||
|
|
||
| // Momentum | ||
| const scalar p = math::sqrt(E * E - ptc.mass() * ptc.mass()); | ||
|
|
||
| // qoverp | ||
| const scalar qop{ptc.charge() / p}; | ||
|
|
||
| // Stopping power in MeV * cm^2 / g | ||
| const scalar dEdx{ | ||
| I.compute_stopping_power(mat, ptc, {ptc, qop}) / mat.mass_density() / | ||
| (unit<scalar>::MeV * unit<scalar>::cm2 / unit<scalar>::g)}; | ||
|
|
||
| const scalar expected_dEdx = std::get<3>(GetParam()); | ||
|
|
||
| // Check if difference is within 8% error | ||
| EXPECT_NEAR((expected_dEdx - dEdx) / dEdx, 0.f, 0.08f); | ||
| } | ||
|
|
||
| /****************** | ||
| * Muon tests | ||
| ******************/ | ||
|
|
||
| // From https://pdg.lbl.gov/2024/AtomicNuclearProperties/index.html | ||
| // Note that we took the PDG value only from Ionization loss (Radiative loss is | ||
| // ignored) | ||
| // Also assumes that the stopping powers of muon and antimuon are the same | ||
| INSTANTIATE_TEST_SUITE_P( | ||
| muon_stopping_power_He, StoppingPowerValidation, | ||
| ::testing::Values(std::make_tuple(helium_gas<scalar>(), muon<scalar>(), | ||
| 100.0f * unit<scalar>::MeV, 2.165f), | ||
| std::make_tuple(helium_gas<scalar>(), muon<scalar>(), | ||
| 1.f * unit<scalar>::GeV, 2.133f), | ||
| std::make_tuple(helium_gas<scalar>(), muon<scalar>(), | ||
| 10.0f * unit<scalar>::GeV, 2.768f), | ||
| std::make_tuple(helium_gas<scalar>(), muon<scalar>(), | ||
| 100.0f * unit<scalar>::GeV, 3.188f))); | ||
|
|
||
| INSTANTIATE_TEST_SUITE_P( | ||
| muon_stopping_power_Si, StoppingPowerValidation, | ||
| ::testing::Values(std::make_tuple(silicon<scalar>(), muon<scalar>(), | ||
| 100.0f * unit<scalar>::MeV, 1.849f), | ||
| std::make_tuple(silicon<scalar>(), muon<scalar>(), | ||
| 1.f * unit<scalar>::GeV, 1.803f), | ||
| std::make_tuple(silicon<scalar>(), muon<scalar>(), | ||
| 10.0f * unit<scalar>::GeV, 2.177f), | ||
| std::make_tuple(silicon<scalar>(), muon<scalar>(), | ||
| 100.0f * unit<scalar>::GeV, 2.451f))); | ||
|
|
||
| INSTANTIATE_TEST_SUITE_P( | ||
| anti_muon_stopping_power_He, StoppingPowerValidation, | ||
| ::testing::Values(std::make_tuple(helium_gas<scalar>(), antimuon<scalar>(), | ||
| 100.0f * unit<scalar>::MeV, 2.165f), | ||
| std::make_tuple(helium_gas<scalar>(), antimuon<scalar>(), | ||
| 1.f * unit<scalar>::GeV, 2.133f), | ||
| std::make_tuple(helium_gas<scalar>(), antimuon<scalar>(), | ||
| 10.0f * unit<scalar>::GeV, 2.768f), | ||
| std::make_tuple(helium_gas<scalar>(), antimuon<scalar>(), | ||
| 100.0f * unit<scalar>::GeV, 3.188f))); | ||
|
|
||
| INSTANTIATE_TEST_SUITE_P( | ||
| anti_muon_stopping_power_Si, StoppingPowerValidation, | ||
| ::testing::Values(std::make_tuple(silicon<scalar>(), antimuon<scalar>(), | ||
| 100.0f * unit<scalar>::MeV, 1.849f), | ||
| std::make_tuple(silicon<scalar>(), antimuon<scalar>(), | ||
| 1.f * unit<scalar>::GeV, 1.803f), | ||
| std::make_tuple(silicon<scalar>(), antimuon<scalar>(), | ||
| 10.0f * unit<scalar>::GeV, 2.177f), | ||
| std::make_tuple(silicon<scalar>(), antimuon<scalar>(), | ||
| 100.0f * unit<scalar>::GeV, 2.451f))); | ||
|
|
||
| /********************* | ||
| * Electron tests | ||
| *********************/ | ||
|
|
||
| // From https://physics.nist.gov/PhysRefData/Star/Text/ESTAR.html | ||
| // Assumes that the stopping powers of electron and positron are the same | ||
| INSTANTIATE_TEST_SUITE_P( | ||
| electron_stopping_power_He, StoppingPowerValidation, | ||
| ::testing::Values(std::make_tuple(helium_gas<scalar>(), electron<scalar>(), | ||
| 100.0f * unit<scalar>::MeV, 3.532f), | ||
| std::make_tuple(helium_gas<scalar>(), electron<scalar>(), | ||
| 1.f * unit<scalar>::GeV, 13.14f))); | ||
|
|
||
| INSTANTIATE_TEST_SUITE_P( | ||
| electron_stopping_power_Si, StoppingPowerValidation, | ||
| ::testing::Values(std::make_tuple(silicon<scalar>(), electron<scalar>(), | ||
| 100.0f * unit<scalar>::MeV, 6.017f), | ||
| std::make_tuple(silicon<scalar>(), electron<scalar>(), | ||
| 1.f * unit<scalar>::GeV, 46.69f))); | ||
|
|
||
| INSTANTIATE_TEST_SUITE_P( | ||
| positron_stopping_power_He, StoppingPowerValidation, | ||
| ::testing::Values(std::make_tuple(helium_gas<scalar>(), positron<scalar>(), | ||
| 100.0f * unit<scalar>::MeV, 3.532f), | ||
| std::make_tuple(helium_gas<scalar>(), positron<scalar>(), | ||
| 1.f * unit<scalar>::GeV, 13.14f))); | ||
|
|
||
| INSTANTIATE_TEST_SUITE_P( | ||
| positron_stopping_power_Si, StoppingPowerValidation, | ||
| ::testing::Values(std::make_tuple(silicon<scalar>(), positron<scalar>(), | ||
| 100.0f * unit<scalar>::MeV, 6.017f), | ||
| std::make_tuple(silicon<scalar>(), positron<scalar>(), | ||
| 1.f * unit<scalar>::GeV, 46.69f))); |