* provided "as is" without express or implied warranty. *
**************************************************************************/
+/* $Id$ */
#include <TGeoManager.h>
#include <TGeoVolume.h>
#include <TGeoBBox.h>
#include "AliITSsegmentationSPD.h"
-//#include "AliITSgeom.h"
+
//////////////////////////////////////////////////////
// Segmentation class for //
// pixels //
// //
//////////////////////////////////////////////////////
+const Int_t AliITSsegmentationSPD::fgkNchipsPerModule = 5;
+const Int_t AliITSsegmentationSPD::fgkNcolumnsPerChip = 32;
ClassImp(AliITSsegmentationSPD)
//_____________________________________________________________________________
fNpx(0),
fNpz(0){
// Default constructor
- for(Int_t k=0; k<256; k++){
- fCellSizeX[k] = 0.;
- fCellSizeZ[k] = 0.;
- }
+ // Initialization to default values
+ Init();
+
+ // Initialization of detector dimensions from TGeo
if(strstr(opt,"TGeo")){
if(!gGeoManager){
- AliError("Geometry is not initialized\n");
+ AliError("Geometry is not initialized\n Using hardwired default values");
return;
}
TGeoVolume *v=NULL;
v = gGeoManager->GetVolume("ITSSPDlay1-sensor");
if(!v){
AliWarning("TGeo volume ITSSPDlay1-sensor not found (hint: use v11Hybrid geometry)\n Using hardwired default values");
- SetDetSize(12800,69600,200);
}
else {
TGeoBBox *s=(TGeoBBox*)v->GetShape();
SetDetSize(s->GetDX()*20000.,s->GetDZ()*20000.,s->GetDY()*20000.);
}
- Float_t bx[256],bz[280];
- Int_t i;
- SetNPads(256,160); // Number of Bins in x and z
- for(i=000;i<256;i++) bx[i] = 50.0; // in x all are 50 microns.
- for(i=000;i<160;i++) bz[i] = 425.0; // most are 425 microns except below
- for(i=160;i<280;i++) bz[i] = 0.0; // Outside of detector.
- bz[ 31] = bz[ 32] = 625.0; // first chip boundry
- bz[ 63] = bz[ 64] = 625.0; // first chip boundry
- bz[ 95] = bz[ 96] = 625.0; // first chip boundry
- bz[127] = bz[128] = 625.0; // first chip boundry
- bz[160] = 425.0; // Set so that there is no zero pixel size for fNz.
- SetBinSize(bx,bz); // Based on AliITSgeomSPD for now.
}
}
return z;
}
//_____________________________________________________________________________
-Float_t AliITSsegmentationSPD::ZpitchFromCol300(Int_t col) const {
+Float_t AliITSsegmentationSPD::Zpitch300() const {
// returns Z pixel pitch for 300 micron pixels.
- col = 0; // done to remove unused variable warning.
return 300.0;
}
//_____________________________________________________________________________
} // end if outsize of detector
s = 0.0;
i = -1;
- while(z>s){
- i++;
- s += fCellSizeZ[i];
- } // end while
+ do {
+ i++;
+ s += fCellSizeZ[i];
+ } while(z>s);
s -= fCellSizeZ[i];
col = (Float_t) i + (z-s)/fCellSizeZ[i];
return col;
}
return pitchz;
}
-//______________________________________________________________________
-AliITSsegmentationSPD::AliITSsegmentationSPD(AliITSgeom *gm):
-AliITSsegmentation(gm),
-fNpx(0),
-fNpz(0){
- // Constructor
- fCorr=0;
- Init();
-}
+
//______________________________________________________________________
void AliITSsegmentationSPD::Copy(TObject &obj) const {
// protected method. copy this to obj
AliITSsegmentation(source),
fNpx(0),
fNpz(0){
+ for(Int_t i=0; i<256; i++)fCellSizeX[i]=0.;
+ for(Int_t i=0; i<280; i++)fCellSizeZ[i]=0.;
// copy constructor
source.Copy(*this);
}
fNpx = 256; // The number of X pixel Cell same as in fCellSizeX array size
fNpz = 279; // The number of Z pixel Cell same as in fCellSizeZ array size
for(i=0;i<fNpx;i++) fCellSizeX[i] = 50.0; // microns all the same
- for(i=0;i<280;i++) fCellSizeZ[i] = ZpitchFromCol300(i); // microns
+ for(i=0;i<280;i++) fCellSizeZ[i] = Zpitch300(); // microns
// for(i=fNpz;i<280;i++) fCellSizeZ[i] = 0.0; // zero out rest of array
fDx = 0;
for(i=0;i<fNpx;i++) fDx += fCellSizeX[i];
//------------------------------
void AliITSsegmentationSPD::Init(){
-// Initialize infromation for 6 read out chip 425X50 micron pixel SPD
-// detectors. This chip is 150 microns thick by 1.28 cm in x by 8.375 cm
-// long. It has 256 50 micron pixels in x and 197 mostly 425 micron size
-// pixels in z. The two pixels between each readout chip are 625 microns long.
-
- //const Float_t kconv=10000.;
- Int_t i;
- fNpx = 256; // The number of X pixel Cell same as in fCellSizeX array size
- fNpz = 192; // The number of Z pixel Cell same as in fCellSizeZ array size
- for(i=0;i<fNpx;i++) fCellSizeX[i] = 50.0; // microns all the same
- for(i=0;i<280;i++) fCellSizeZ[i] = ZpitchFromCol(i); // microns
-// for(i=fNpz;i<280;i++) fCellSizeZ[i] = 0.0; // zero out rest of array
- fDx = 0;
- for(i=0;i<fNpx;i++) fDx += fCellSizeX[i];
- fDz = 0;
- for(i=0;i<fNpz;i++) fDz += fCellSizeZ[i];
- fDy = 300.0; //microns SPD sensitive layer thickness
- //printf(" AliITSsegmentationSPD - Init: fNpx fNpz fDx fDz %d %d %f %f\n",fNpx, fNpz, fDx, fDz);
+// Initialize information for 5 read out chip 425X50 micron pixel SPD
+// detectors (ladder).
+// Each readout chip is 150 micron thick.
+// The ladder sensor is 200 micron thick by 1.28 cm in x by 6.96 cm in z.
+// It has 256 50 micron pixels in x and 160 mostly 425 micron pixels in z.
+// The two pixels at boundary between two adjacent readout chips are
+// 625 micron long.
+
+ Float_t bx[256],bz[280];
+ Int_t i;
+ SetNPads(256,160); // Number of Bins in x and z
+ for(i=000;i<256;i++) bx[i] = 50.0; // in x all are 50 microns.
+ for(i=000;i<160;i++) bz[i] = 425.0; // most are 425 microns except below
+ for(i=160;i<280;i++) bz[i] = 0.0; // Outside of detector.
+ bz[ 31] = bz[ 32] = 625.0; // first chip boundary
+ bz[ 63] = bz[ 64] = 625.0; // first chip boundary
+ bz[ 95] = bz[ 96] = 625.0; // first chip boundary
+ bz[127] = bz[128] = 625.0; // first chip boundary
+ bz[160] = 425.0; // Set so that there is no zero pixel size for fNz.
+ SetBinSize(bx,bz);
+ SetDetSize(12800,69600,200); // full lengths (x,z,y) in microns
}
//------------------------------
zu = z;
return; // Found x and z, return.
}
+//----------------------------------------------------------------------
+Int_t AliITSsegmentationSPD::GetChipFromChannel(Int_t, Int_t iz) const {
+ // returns chip number (in range 0-4) starting from channel number
+ if(iz>=fNpz || iz<0 ){
+ AliWarning("Bad cell number");
+ return -1;
+ }
+ Int_t theChip=iz/fgkNcolumnsPerChip;
+ return theChip;
+}
+//----------------------------------------------------------------------
+Int_t AliITSsegmentationSPD::GetChipFromLocal(Float_t, Float_t zloc) const {
+ // returns chip number (in range 0-4) starting from local coordinates
+ Int_t ix0,iz;
+ if (!LocalToDet(0,zloc,ix0,iz)) {
+ AliWarning("Bad local coordinate");
+ return -1;
+ }
+ return GetChipFromChannel(ix0,iz);
+}
+//----------------------------------------------------------------------
+Int_t AliITSsegmentationSPD::GetChipsInLocalWindow(Int_t* array, Float_t zmin, Float_t zmax, Float_t, Float_t) const {
+ // returns the number of chips containing a road defined by given local coordinate limits
+
+ const Float_t kconv = 1.0E-04; // converts microns to cm.
+
+ if (zmin>zmax) {
+ AliWarning("Bad coordinate limits: zmin>zmax!");
+ return -1;
+ }
+
+ Int_t nChipInW = 0;
+
+ Float_t zminDet = -0.5*kconv*Dz();
+ Float_t zmaxDet = 0.5*kconv*Dz();
+ if(zmin<zminDet) zmin=zminDet;
+ if(zmax>zmaxDet) zmax=zmaxDet;
+
+ Int_t n1 = GetChipFromLocal(0,zmin);
+ array[nChipInW] = n1;
+ nChipInW++;
+
+ Int_t n2 = GetChipFromLocal(0,zmax);
+
+ if(n2!=n1){
+ Int_t imin=TMath::Min(n1,n2);
+ Int_t imax=TMath::Max(n1,n2);
+ for(Int_t ichip=imin; ichip<=imax; ichip++){
+ if(ichip==n1) continue;
+ array[nChipInW]=ichip;
+ nChipInW++;
+ }
+ }
+
+ return nChipInW;
+}
+//----------------------------------------------------------------------
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff