LinearBreitWheeler.cpp File Reference

#include "Physics/LinearBreitWheeler.h"
#include "Physics/Physics.h"
#include "Utilities/OpalException.h"
#include "Utilities/Options.h"
#include <algorithm>
#include <cmath>
#include <cstdint>
#include <limits>
#include <random>
#include <string>

Include dependency graph for LinearBreitWheeler.cpp:

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Namespaces
namespace	Physics
namespace	Physics::LinearBreitWheeler

Functions
double	Physics::LinearBreitWheeler::photonEnergyFromWavelengthGeV (double wavelength_m)
	Convert a laser wavelength to a single-photon energy.
double	Physics::LinearBreitWheeler::invariantSGeV2 (double photon1EnergyGeV, double photon2EnergyGeV, const Vector_t< double, 3 > &photon1Direction, const Vector_t< double, 3 > &photon2Direction)
	Two-photon invariant \(s\) for Breit-Wheeler pair production.
double	Physics::LinearBreitWheeler::thresholdInvariantSGeV2 ()
	Threshold invariant for \(\gamma + \gamma \to e^- + e^+\).
bool	Physics::LinearBreitWheeler::isAboveThreshold (double invariantSGeV2)
	Check whether pair creation is kinematically allowed.
double	Physics::LinearBreitWheeler::pairBetaCM (double invariantSGeV2)
	Outgoing lepton speed in the pair center-of-momentum frame.
double	Physics::LinearBreitWheeler::totalCrossSection (double invariantSGeV2)
	Total unpolarized linear Breit-Wheeler cross section.
double	Physics::LinearBreitWheeler::proposalZToScatteringCosineCM (double invariantSGeV2, double proposalZ)
	Map CAIN's proposal parameter \(z \in [-1,1]\) to the CM scattering cosine.
double	Physics::LinearBreitWheeler::unpolarizedAngularWeight (double invariantSGeV2, double proposalZ)
	Evaluate the unpolarized CAIN-aligned angular kernel in proposal coordinates.
SamplingKernel	Physics::LinearBreitWheeler::makeSamplingKernel (double highEnergyPhotonEnergyGeV, double laserPhotonEnergyGeV, const Vector_t< double, 3 > &highEnergyDirection, const Vector_t< double, 3 > &laserDirection)
	Build a cached sampling kernel for repeated sampled events.
std::mt19937_64	Physics::LinearBreitWheeler::makeHostRandomEngine (std::uint64_t streamIndex=0)
	Build a deterministic host RNG from Options::seed.
SampledEvent	Physics::LinearBreitWheeler::sampleEvent (const SamplingKernel &kernel, std::mt19937_64 &engine)
	Sample one unpolarized linear Breit-Wheeler event.