* about the suitability of this software for any purpose. It is *
* provided "as is" without express or implied warranty. *
**************************************************************************/
-
/* $Id$ */
-
-//////////////////////////////////////////////////////////////////////////////
+/** @file AliFMD3.cxx
+ @author Christian Holm Christensen <cholm@nbi.dk>
+ @date Sun Mar 26 18:26:12 2006
+ @brief Concrete implementation of AliFMDDetector for FMD3
+*/
+//____________________________________________________________________
//
-// Concrete implementation of AliFMDSubDetector
+// Concrete implementation of AliFMDDetector
//
-// This implements the geometry for FMD3
+// This implements the geometry for FMD3.
+// This has 2 rings.
+// The support of the FMD3 is a carbon-fibre cone, attached to the ITS
+// support via flanges. The cone also supports the beam-pipe.
+// The support is a special cone of carbon-fibre made by a Danish
+// Yacht company.
//
-//////////////////////////////////////////////////////////////////////////////
-#ifndef ALIFMD3_H
-# include "AliFMD3.h"
-#endif
-#ifndef ROOT_TVirtualMC
-# include <TVirtualMC.h>
-#endif
-#ifndef ALILOG_H
-# include "AliLog.h"
-#endif
-#ifndef ALIFMDRING_H
-# include "AliFMDRing.h"
-#endif
-//____________________________________________________________________
-ClassImp(AliFMD3);
+#include <TMath.h> // ROOT_TMath
-//____________________________________________________________________
-AliFMD3::AliFMD3()
- : AliFMDSubDetector(3)
-{}
+#include "AliFMD3.h" // ALIFMD3_H
+#include "AliFMDDebug.h" // ALIFMDDEBUG_H ALILOG_H
+#include "AliFMDRing.h" // ALIFMDRING_H
+#include <TVector3.h>
-//____________________________________________________________________
-AliFMD3::~AliFMD3()
-{}
+//====================================================================
+ClassImp(AliFMD3)
+#if 0
+ ; // This is here to keep Emacs for indenting the next line
+#endif
//____________________________________________________________________
-void
-AliFMD3::SetupGeometry(Int_t airId, Int_t kaptionId)
+AliFMD3::AliFMD3(AliFMDRing* inner, AliFMDRing* outer)
+ : AliFMDDetector(3, inner, outer),
+ // fNoseZ(16.54667)
+ fNoseZ(18.13 - inner->GetModuleDepth()-inner->GetModuleSpacing()/2), // From drawing
+ fFlangeDepth(0),
+ fFlangeHighR(49.25), // From drawing
+ fFlangeLength(0),
+ fFlangeWidth(6), // From drawing
+ fFiducialRadius(.25),
+ fConeInnerAngle(0),
+ fConeOuterAngle(0),
+ fHoleOffset(6.9), // From drawing
+ fHoleDepth(2), // What's needed
+ fHoleLength(31.2), // From drawing
+ fHoleLowWidth(3), // 4), // What's needed
+ fHoleHighWidth(18.5), // 17.5), // 18), // What's needed
+ fBoltLength(1), // Guessed
+ fBoltRadius(0.15), // Estimate
+ fConeRadii(6),
+ fFiducialHoles(4)
{
- fInnerHoneyLowR = fInner->GetLowR() + 1;
- fInnerHoneyHighR = fInner->GetHighR() + 1;
- fOuterHoneyLowR = fOuter->GetLowR() + 1;
- fOuterHoneyHighR = fOuter->GetHighR() + 1;
+ // Constructor.
+ Double_t off = 0; // -0.39615-0.10185; // -0.25;
+ if (off != 0)
+ AliWarning(Form("Z position of FMD3 rings may be off by %fcm!", off));
- Double_t par[3];
- par[0] = fInner->GetLowR();
- par[1] = fOuterHoneyHighR;
- par[2] = fDz = (TMath::Abs(fInnerZ - fOuterZ)
- + fInner->GetSiThickness()
- + fInner->GetPrintboardThickness()
- + fInner->GetLegLength()
- + fInner->GetModuleSpacing()
- + fHoneycombThickness) / 2;
- fVolumeId = gMC->Gsvolu("FMD3", "TUBE", airId, par, 3);
+ SetInnerZ(-62.8+off); // By design
+ SetOuterZ(-75.2+off); // By design
- gMC->Matrix(fRotationId, 90, 0, 90, 90, 0, 0);
- //0, 180, 90, 90, 180, 0);
+ SetInnerHoneyLowR(4.18207); // From drawing
+ SetInnerHoneyHighR(19.74922); // From drawing
+ SetOuterHoneyLowR(13.4776); // From drawing
+ SetOuterHoneyHighR(31.01964); // From drawing
+
+ // These are from the drawings
+ fConeRadii.Add(new TVector3( 0, 5.55, 6.25));
+ fConeRadii.Add(new TVector3( 2.35, 5.55, 6.25));
+ fConeRadii.Add(new TVector3( 2.9935, 5.55, 6.88479));
+ fConeRadii.Add(new TVector3(28.9435, 31.50, 32.75850));
+ fConeRadii.Add(new TVector3(29.5, 31.50, 33.4));
+ fConeRadii.Add(new TVector3(30.9, 31.50, 33.4));
- AliFMDSubDetector::SetupGeometry(airId, kaptionId);
+ // These are from the drawings
+ fFiducialHoles.Add(new TVector2(29.666, 32.495));
+ fFiducialHoles.Add(new TVector2(31.082, 33.910));
+ fFiducialHoles.Add(new TVector2(32.674, 35.503));
+ fFiducialHoles.Add(new TVector2(33.403, 34.818));
}
//____________________________________________________________________
-void
-AliFMD3::Geometry(const char* mother, Int_t pbRotId,
- Int_t idRotId, Double_t z)
+void
+AliFMD3::Init()
{
- z = fInnerZ - fDz;
- gMC->Gspos("FMD3", 1, mother, 0, 0, z, fRotationId);
+ // Initialize
+ AliFMDDetector::Init();
+ // TVector3& v0 = *(static_cast<TVector3*>(fConeRadii.At(0)));
+ TVector3& v1 = *(static_cast<TVector3*>(fConeRadii.At(1)));
+ TVector3& v2 = *(static_cast<TVector3*>(fConeRadii.At(2)));
+ TVector3& v3 = *(static_cast<TVector3*>(fConeRadii.At(3)));
+ TVector3& v4 = *(static_cast<TVector3*>(fConeRadii.At(4)));
+ TVector3& v5 = *(static_cast<TVector3*>(fConeRadii.At(5)));
+
+ fFlangeDepth = v5.X() - v4.X();
+ fFlangeLength = fFlangeHighR - v5.Y();
+
+ fConeInnerAngle = TMath::ATan2(v4.Z()-v1.Z(), v4.X()-v1.X());
+ fConeOuterAngle = TMath::ATan2(v3.Y()-v2.Y(), v3.X()-v2.X());
- AliFMDSubDetector::Geometry("FMD3", pbRotId, idRotId, z);
+#if 0
+ Double_t hz1 = -fHoleOffset+fInnerZ+fNoseZ;
+ fHoleLength = TMath::Sqrt(TMath::Power(v4.Z()-ConeR(hz1),2) +
+ TMath::Power(v4.X()-fHoleOffset,2));
+#endif
}
+//____________________________________________________________________
+Double_t
+AliFMD3::ConeR(Double_t z, Option_t* opt) const
+{
+ // Calculate the cone radius at Z
+ // TVector3& v0 = *(static_cast<TVector3*>(fConeRadii.At(0)));
+ TVector3& v1 = *(static_cast<TVector3*>(fConeRadii.At(1)));
+ TVector3& v2 = *(static_cast<TVector3*>(fConeRadii.At(2)));
+ TVector3& v3 = *(static_cast<TVector3*>(fConeRadii.At(3)));
+ TVector3& v4 = *(static_cast<TVector3*>(fConeRadii.At(4)));
+ TVector3& v5 = *(static_cast<TVector3*>(fConeRadii.At(5)));
+
+ if (z > fInnerZ + fNoseZ) {
+ AliWarning(Form("z=%lf is before start of cone %lf", z, fInnerZ + fNoseZ));
+ return -1;
+ }
+ if (z < fInnerZ + fNoseZ - v5.Z()) {
+ AliWarning(Form("z=%lf is after end of cone %lf", z,
+ fInnerZ + fNoseZ - v5.Z()));
+ return -1;
+ }
+ Double_t rz = -(z-fInnerZ-fNoseZ);
+ Bool_t inner = opt[0] == 'I' || opt[1] == 'i';
+ if (inner && rz <= v2.X()) return v2.Y();
+ if (!inner && rz <= v1.X()) return v1.Z();
+ if (inner && rz > v3.X()) return v3.Y();
+ if (!inner && rz > v4.X()) return v4.Z();
+ rz -= (inner ? v2.X() : v1.X());
+ Double_t sr = (inner ? v2.Y() : v1.Z());
+ Double_t ang = (inner ? fConeInnerAngle : fConeOuterAngle);
+ return sr + rz * TMath::Tan(ang);
+}
+
//____________________________________________________________________
//