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SSD hot chip table

Updated on Mon, 2015-03-16 09:51. Originally created by bouchet on 2015-01-25 12:08.
Masking table for SSD chip.

1) The structure is based on the PXL pxlHotPixels table where only the address of pixel to flag is written to table
struct ssdHotChips {
  unsigned long hotChip[3840]; /* side*2000 + ladder[0-19]*96 wafer[0-15]*6 + chip[1-6]*/
};
The table has a size of 3840 elements : 2(side) * 20(ladder) * 16(wafer) * 6(chips)

2)Table is initialized in StSstDbMaker :
//_____________________________________________________________________________
Int_t StSstDbMaker::InitRun(Int_t runNumber) {
  mode = m_Mode;
  St_ssdHotChips *hotChips = (St_ssdHotChips *)GetDataBase("Calibrations/ssd/ssdHotChips");
  if (hotChips) {
    std::cout << "ssd hot chips table found ... initialize" << std::endl;
    setHotChips(hotChips->GetTable());}
  else {LOG_WARN << " no pxl hot pixels table " << endm; return kStErr;}

3) A map is built with setHotChips() method in order to be accessible from another maker :
//_____________________________________________________________________________
void StSstDbMaker::setHotChips(ssdHotChips_st *hotChipsTable)
{
  for(Int_t i=0; i<3840; i++){ 
    if(hotChipsTable[0].hotChip[i]>0){ 
      mMapHotChips.insert ( std::pair<unsigned long, short>(hotChipsTable[0].hotChip[i],i) ); 
      std::cout <<" i / val : " << i << " " << hotChipsTable[0].hotChip[i] << endl;
    } 
    else break;
  }
}

4) Access from another maker is done using the method chipHot()
//_____________________________________________________________________________

Int_t StSstDbMaker::chipHot(Int_t side, Int_t ladder, Int_t wafer, Int_t chip) const
{
  map<unsigned int,short>::const_iterator got;
  got = mMapHotChips.find(side*2000 + ladder*96 + wafer*6 + chip+1);
  if ( got == mMapHotChips.end() ) {
    return 0;
  }
  else {
    return 1;
  }
}


5)To remove a chip during StSstDaqMaker :

 //get access to hot chips table 
      std::cout <<" ladder[0-19]/wafer[0-15]/chip[0-5]/side[0-1]/status : " << ladder << " " << wafer <<" " << chip <<" " <<
      id_side <<" " << gStSstDbMaker->chipHot(id_side,ladder,wafer,chip+1) << endl;
      if(gStSstDbMaker->chipHot(id_side,ladder,wafer,chip))continue;


6) A test entry looked like this :

TDataSet *CreateTable() {
  if (!gROOT->GetClass("St_ssdHotChips")) return 0;
  ssdHotChips_st row;
  St_ssdHotChips *tableSet = new St_ssdHotChips("ssdHotChips",1);
  row.hotChip[0]=1;   //L0W0C1P
  row.hotChip[1]=6;   //L0W0C6P
  row.hotChip[2]=7;   //L0W1C1P
  row.hotChip[3]=96;  //L0W15C6P  
  row.hotChip[4]=97;  //L1W0C1P  
  row.hotChip[5]=2037; //L0W6C1N  
  // tempo
  for(int i=6;i<3840;++i) row.hotChip[i] = 0;
  // ----------------- end of code ---------------
  tableSet->AddAt(&row,0);
  return (TDataSet *)tableSet;
}
Especially the last entry is the 1st chip of wafer 5 ladder 0 side N (index = 2037)
The result of running the DaqMaker without and with the hot chips masking : bin around 37 (Y-axis) is masked.



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