* provided "as is" without express or implied warranty. *
**************************************************************************/
-/* $Id:$ */
+/* $Id$ */
#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)
//_____________________________________________________________________________
}
}
-//______________________________________________________________________
-AliITSsegmentationSPD::AliITSsegmentationSPD(AliITSgeom *gm):
-AliITSsegmentation(gm),
-fNpx(0),
-fNpz(0){
- // Constructor
- fCorr=0;
- Init();
-}
-
//_____________________________________________________________________________
Float_t AliITSsegmentationSPD::ColFromZ300(Float_t z) const {
// Get column number for each z-coordinate taking into account the
//------------------------------
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.
+// 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;
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;
+}
+//----------------------------------------------------------------------