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176 lines
6.6 KiB
C++
176 lines
6.6 KiB
C++
/*
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Class which represents a single MMM detector in the SABRE array at FSU. Origial code by KGH, re-written by
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GWM.
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Distances in meters, angles in radians.
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The channel arrays have four points, one for each corner. The corners are
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as follows, as if looking BACK along beam (i.e. from the target's pov):
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0---------------------1
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3---------------------2 y
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(z is hence positive along beam direction)
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The channel numbers, also as looking back from target pov, are:
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>> rings are 0 -- 15 from inner to outer:
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15 -------------------
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14 -------------------
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13 -------------------
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.
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.
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2 -------------------
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1 -------------------
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0 -------------------
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>> wedges are 0 -- 7 moving counterclockwise:
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7 6 ... 1 0
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>> Note that the detector starts centered on the x-axis (central phi = 0) untilted, and then is rotated to wherever the frick
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it is supposed to go; phi = 90 is centered on y axis, pointing down towards the bottom of the scattering chamber
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-- GWM, Dec 2020; based on the og code from kgh
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*/
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#ifndef SABREDETECTOR_H
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#define SABREDETECTOR_H
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#include <vector>
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#include <cmath>
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#include "Vec3.h"
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#include "Rotation.h"
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class SabreDetector {
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public:
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SabreDetector();
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SabreDetector(double Rin, double Rout, double deltaPhi_flat, double phiCentral, double tiltFromVert, double zdist, double xdist=0, double ydist=0);
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~SabreDetector();
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/*Return coordinates of the corners of each ring/wedge in SABRE*/
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inline Mask::Vec3 GetRingFlatCoords(int ch, int corner) { return CheckRingLocation(ch, corner) ? m_ringCoords_flat[ch][corner] : Mask::Vec3(); };
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inline Mask::Vec3 GetWedgeFlatCoords(int ch, int corner) { return CheckWedgeLocation(ch, corner) ? m_wedgeCoords_flat[ch][corner] : Mask::Vec3(); };
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inline Mask::Vec3 GetRingTiltCoords(int ch, int corner) { return CheckRingLocation(ch, corner) ? m_ringCoords_tilt[ch][corner] : Mask::Vec3(); };
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inline Mask::Vec3 GetWedgeTiltCoords(int ch, int corner) { return CheckWedgeLocation(ch, corner) ? m_wedgeCoords_tilt[ch][corner] : Mask::Vec3(); };
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Mask::Vec3 GetTrajectoryCoordinates(double theta, double phi);
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std::pair<int, int> GetTrajectoryRingWedge(double theta, double phi);
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Mask::Vec3 GetHitCoordinates(int ringch, int wedgech);
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/*Basic getters*/
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inline int GetNumberOfWedges() { return m_nWedges; };
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inline int GetNumberOfRings() { return m_nRings; };
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inline double GetInnerRadius() { return m_Rinner; };
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inline double GetOuterRadius() { return m_Router; };
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inline double GetPhiCentral() { return m_phiCentral; };
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inline double GetTiltAngle() { return m_tilt; };
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inline Mask::Vec3 GetTranslation() { return m_translation; };
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inline Mask::Vec3 GetNormTilted() { return TransformToTiltedFrame(m_norm_flat); };
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private:
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/*Class constants*/
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static constexpr int m_nRings = 16;
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static constexpr int m_nWedges = 8;
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static constexpr double deg2rad = M_PI/180.0;
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/*These are implicitly the width of the spacing between detector active strips*/
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static constexpr double POSITION_TOL = 0.0001; //0.1 mm position tolerance
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static constexpr double ANGULAR_TOL = 0.1*M_PI/180.0; // 0.1 degree angular tolerance
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void CalculateCorners();
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/*Performs the transformation to the tilted,rotated,translated frame of the SABRE detector*/
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inline Mask::Vec3 TransformToTiltedFrame(Mask::Vec3& vector) { return (m_ZRot*(m_YRot*vector)) + m_translation; };
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/*Determine if a given channel/corner combo is valid*/
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inline bool CheckRingChannel(int ch) { return (ch<m_nRings && ch>=0) ? true : false; };
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inline bool CheckWedgeChannel(int ch) { return (ch<m_nWedges && ch >=0) ? true : false; };
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inline bool CheckCorner(int corner) { return (corner < 4 && corner >=0) ? true : false; };
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inline bool CheckRingLocation(int ch, int corner) { return CheckRingChannel(ch) && CheckCorner(corner); };
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inline bool CheckWedgeLocation(int ch, int corner) { return CheckWedgeChannel(ch) && CheckCorner(corner); };
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/*
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For all of the calculations, need a limit precision to determine if values are actually equal or not
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Here the approx. size of the strip spacing is used as the precision.
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*/
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inline bool CheckPositionEqual(double val1,double val2) { return fabs(val1-val2) > POSITION_TOL ? false : true; };
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inline bool CheckAngleEqual(double val1,double val2) { return fabs(val1-val2) > ANGULAR_TOL ? false : true; };
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/*Determine if a hit is within the bulk detector*/
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inline bool IsInside(double r, double phi) {
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double phi_1 = m_deltaPhi_flat/2.0;
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double phi_2 = M_PI*2.0 - m_deltaPhi_flat/2.0;
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return (((r > m_Rinner && r < m_Router) || CheckPositionEqual(r, m_Rinner) || CheckPositionEqual(r, m_Router)) && (phi > phi_2 || phi < phi_1 || CheckAngleEqual(phi, phi_1) || CheckAngleEqual(phi, phi_2)));
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};
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/*
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For a given radius/phi are you inside of a given ring/wedge channel,
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or are you on the spacing between these channels
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*/
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inline bool IsRing(double r, int ringch) {
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double ringtop = m_Rinner + m_deltaR_flat_ring*(ringch + 1);
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double ringbottom = m_Rinner + m_deltaR_flat_ring*(ringch);
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return (r>ringbottom && r<ringtop);
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};
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inline bool IsRingTopEdge(double r, int ringch) {
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double ringtop = m_Rinner + m_deltaR_flat_ring*(ringch + 1);
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return CheckPositionEqual(r, ringtop);
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};
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inline bool IsRingBottomEdge(double r, int ringch) {
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double ringbottom = m_Rinner + m_deltaR_flat_ring*(ringch);
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return CheckPositionEqual(r, ringbottom);
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};
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inline bool IsWedge(double phi, int wedgech) {
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double wedgetop = -m_deltaPhi_flat/2.0 + m_deltaPhi_flat_wedge*(wedgech+1);
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double wedgebottom = -m_deltaPhi_flat/2.0 + m_deltaPhi_flat_wedge*(wedgech);
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return ((phi>wedgebottom && phi<wedgetop));
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};
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inline bool IsWedgeTopEdge(double phi, int wedgech) {
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double wedgetop = -m_deltaPhi_flat/2.0 + m_deltaPhi_flat_wedge*(wedgech+1);
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return CheckAngleEqual(phi, wedgetop);
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}
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inline bool IsWedgeBottomEdge(double phi, int wedgech) {
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double wedgebottom = -m_deltaPhi_flat/2.0 + m_deltaPhi_flat_wedge*(wedgech);
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return CheckAngleEqual(phi, wedgebottom);
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}
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/*Class data*/
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double m_Router, m_Rinner, m_deltaPhi_flat, m_phiCentral, m_tilt;
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Mask::Vec3 m_translation;
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Mask::YRotation m_YRot;
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Mask::ZRotation m_ZRot;
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double m_deltaR_flat, m_deltaR_flat_ring, m_deltaPhi_flat_wedge;
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Mask::Vec3 m_norm_flat;
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std::vector<std::vector<Mask::Vec3>> m_ringCoords_flat, m_wedgeCoords_flat;
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std::vector<std::vector<Mask::Vec3>> m_ringCoords_tilt, m_wedgeCoords_tilt;
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};
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#endif
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