Gabriele Cosmo
161 lines
6.0 KiB
C++
161 lines
6.0 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//---------------------------------------------------------------------------
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// ClassName: G4UCNMicroRoughnessHelper
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//
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// Class description:
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//
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// This file contains the headers of various functions all related to the
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// calculation of microroughness.
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// see A. Steyerl, Z. Physik 254 (1972) 169.
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//
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// Angular cut: for angles which are closer to the specular direction than a
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// certain value (0.01°), the probability is set to 0 in order to avoid a
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// hang-up at the generation of the polar angle due to a very sharp angular
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// distribution
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//
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// 12-05-14, adopted from Stefan Heule (PSI) Thesis by P.Gumplinger
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// reported in F. Atchison et al., Eur. Phys. J. A 44, 23–29 (2010)
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// DOI: 10.1140/epja/i2010-10926-x
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// Thanks to Geza Zsigmond
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//
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// 02-11-19 Stefan Heule's thesis is available from PSI UCN group pages at
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// https://www.psi.ch/en/ltp-ucn-physics/papers-and-theses
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// or directly at https://opac.nebis.ch/ediss/20080426_002127549.pdf
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#ifndef G4MICROROUGHNESSHELPER_HH
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#define G4MICROROUGHNESSHELPER_HH 1
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#include "G4Types.hh"
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class G4UCNMicroRoughnessHelper
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{
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public: // with description
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static G4UCNMicroRoughnessHelper* GetInstance();
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public: // with description
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// Transmitted intensity with k-vector in vacuum
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// arguments:
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// 1) cos(theta)^2,
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// 2) (k_l/k)^2
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G4double S2(G4double, G4double) const;
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// Transmitted intensity with k-vector within the medium
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// arguments:
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// 1) cos(theta')^2,
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// 2) (k_l/k')^2
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G4double SS2(G4double, G4double) const;
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// Fourier-tranform of the autocorrelation function with k-vector in vacuum
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// arguments:
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// 1) k^2,
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// 2) theta_i,
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// 3) theta_o,
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// 4) phi_o,
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// 5) b^2,
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// 6) w^2,
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// 7) angular cut
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G4double Fmu(G4double, G4double, G4double, G4double, G4double, G4double, G4double) const;
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// Fourier-tranform of the autocorrelation function with k-vector within
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// the medium
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// arguments:
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// 1) k,
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// 2) k',
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// 3) theta_i,
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// 4) theta'_o,
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// 5) phi'_o,
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// 6) b^2,
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// 7) w^2,
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// 8) angular cut
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// 9) theta_refract
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G4double FmuS(
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G4double, G4double, G4double, G4double, G4double, G4double, G4double, G4double, G4double) const;
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// Integral probability for non-specular reflection
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// arguments:
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// 1) E,
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// 2) V_F,
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// 3) theta_i,
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// 4) number of angles theta_o for which the probability is calculated,
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// 5) number of angles phi_o for which the probability is calculated,
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// 6) b^2,
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// 7) w^2,
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// 8) pointer to G4double array with max values of the probability,
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// 9) angular cut
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G4double IntIplus(
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G4double, G4double, G4double, G4int, G4int, G4double, G4double, G4double*, G4double) const;
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// Probability of non-specular reflection with the microroughness model
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// arguments:
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// 1) E,
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// 2) V_F,
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// 3) theta_i,
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// 4) theta_o,
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// 5) phi_o,
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// 6) b,
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// 7) w,
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// 8) angular cut
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G4double ProbIplus(
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G4double, G4double, G4double, G4double, G4double, G4double, G4double, G4double) const;
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// Integral probability for non-specular transmission
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// arguments:
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// 1) E,
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// 2) V_F,
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// 3) theta_i,
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// 4) number of angles theta_o for which the probability is calculated,
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// 5) number of angles phi_o for which the probability is calculated,
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// 6) b^2,
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// 7) w^2,
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// 8) pointer to G4double array with max values of the probability,
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// 9) angular cut
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G4double IntIminus(
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G4double, G4double, G4double, G4int, G4int, G4double, G4double, G4double*, G4double) const;
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// Probability of non-specular transmission with the microroughness model
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// arguments:
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// 1) E,
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// 2) V_F,
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// 3) theta_i,
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// 4) theta'_o,
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// 5) phi'_o,
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// 6) b,
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// 7) w,
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// 8) angular cut
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G4double ProbIminus(
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G4double, G4double, G4double, G4double, G4double, G4double, G4double, G4double) const;
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protected:
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G4UCNMicroRoughnessHelper() = default;
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~G4UCNMicroRoughnessHelper();
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private:
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static G4UCNMicroRoughnessHelper* fpInstance;
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};
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#endif // G4MICROROUGHNESSHELPER_HH
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