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#include "Digitizer.h" |
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|
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void Digitizer::DigitizeAC() { |
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// created: J. Conrad, KTH |
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// modified: S. Orsi, INFN Roma2 |
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// fDataAC[0-63]: main AC board |
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// fDataAC[64-127]: extra AC board (identical to main board, for now) |
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// We activate all branches. Once the digitization algorithm is determined |
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// only the branches that involve needed information will be activated |
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|
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// Threshold: thr=0.8 MeV. |
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Float_t thr = 8e-4; |
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Int_t nReg=6,i; |
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fDataAC[0] = 0xACAC; |
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fDataAC[64]= 0xACAC; |
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fDataAC[1] = 0xAC11; |
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fDataAC[65] = 0xAC22; |
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|
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// the third word is a status word (dummy: "no errors are present in the AC boards") |
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fDataAC[2] = 0xFFFF; //FFEF? |
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fDataAC[66] = 0xFFFF; |
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// FPGA Registers (dummy) |
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for (i=0; i<=nReg; i++){ |
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fDataAC[i+4] = 0xFFFF; |
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fDataAC[i+68] = 0xFFFF; |
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} |
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// the last word is a CRC |
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// Dummy for the time being, but it might need to be calculated in the end |
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fDataAC[63] = 0xABCD; |
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fDataAC[127] = 0xABCD; |
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|
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// shift registers (moved to the end of the routine) |
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|
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Int_t evntLSB=(UShort_t)Ievnt; |
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Int_t evntMSB=Ievnt >> 16; |
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|
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// singles counters are dummy |
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for(i=0; i<=15; i++){ //SO Oct '07: |
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fDataAC[i+26] = evntLSB; |
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fDataAC[i+90] = evntLSB; |
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} |
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for(i=0; i<=7; i++){ |
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fDataAC[i+42] = evntLSB; |
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fDataAC[i+106] = evntLSB; |
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} |
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// increments for every trigger might be needed at some point. |
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// dummy for now |
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fDataAC[50] = 0x0000; |
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fDataAC[114] = 0x0000; |
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|
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// dummy FPGA clock (increment by 1 at each event) |
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if(Ievnt<=0xFFFF){ |
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fDataAC[51] = 0x0000; |
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fDataAC[52] = Ievnt; |
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fDataAC[115] = 0x0000; |
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fDataAC[116] = Ievnt; |
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} |
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else{ |
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fDataAC[51] = evntMSB; |
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fDataAC[52] = evntLSB; |
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fDataAC[115] = fDataAC[51]; |
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fDataAC[116] = fDataAC[52]; |
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} |
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// dummy temperatures |
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fDataAC[53] = 0x0000; |
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fDataAC[54] = 0x0000; |
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fDataAC[117] = 0x0000; |
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fDataAC[118] = 0x0000; |
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// dummy DAC thresholds |
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for(i=0; i<=7; i++){ |
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fDataAC[i+55] = 0x1A13; |
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fDataAC[i+119] = 0x1A13; |
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} |
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// In this simpliefied approach we will assume that once a particle releases > 0.5 mip in one of the 12 AC detectors it will fire. We will furthermore assume that both cards read out identical data. |
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|
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// If you develop your digitization algorithm, you should start by identifying the information present in level2 (post-darth-vader) data. |
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|
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Float_t SumEcat[4],SumEcas[4],SumEcard[4]; |
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for(i=0;i<4;i++){ |
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SumEcat[i]=0.; |
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SumEcas[i]=0.; |
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SumEcard[i]=0.; |
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} |
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// energy dependence on position (see file AcFitOutputDistancePmt.C by S.Orsi) |
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// based on J.Lundquist's calculations (PhD thesis, page 94) |
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// function: [0]+[1]*atan([2]/(x+1)), where the 3 parameters are: |
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// 8.25470e-01 +- 1.79489e-02 |
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// 6.41609e-01 +- 2.65846e-02 |
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// 9.81177e+00 +- 1.21284e+00 |
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// hp: 1 minimum ionising particle at 35cm from the PMT releases 1mip |
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|
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// PMT positions: x,y,z: (average position of the 2 PMTs) |
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Float_t posCasPmt[4][3]={{28.308, -17.168, 63.644}, // 1 - CAS CPU: x,y,z |
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{18.893, 24.913, 63.644}, // 2 - CAS DCDC |
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{-24.307, 17.162, 63.644}, // 3 - CAS VME |
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{-17.765, -28.300, 63.644}}; // 4 - CAS IPM |
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Float_t dAC=0.; // distance from PMT |
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|
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if(Nthcat>*ncat){ |
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cout<<"*** ERROR AC! Nthcat= "<<Nthcat<<" out of range! "<<endl; |
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for(i=0;i<4;i++)SumEcat[i]=2*thr; |
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} |
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else{ |
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for(i=0;i<Nthcat;i++){ |
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if(Icat[i]>0 && Icat[i]<5)SumEcat[Icat[i]-1]+=Erelcat[i]; |
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} |
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} |
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if(Nthcas>*ncas){ |
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cout<<"*** ERROR AC! Nthcas= "<<Nthcas<<" out of range!"<<endl; |
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for(i=0;i<4;i++)SumEcas[i]=2*thr; |
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} |
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else{ |
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for (i=0;i<Nthcas;i++){ |
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if(Icas[i]>0 && Icas[i]<5){ |
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dAC=sqrt(pow((Xincas[i]+Xoutcas[i])/2 - posCasPmt[Icas[i]-1][0],2) + pow((Yincas[i]+Youtcas[i])/2 - posCasPmt[Icas[i]-1][1],2) + pow((Zincas[i]+Zoutcas[i])/2 - posCasPmt[Icas[i]-1][2],2)); |
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SumEcas[Icas[i]-1] += Erelcas[i]*attenAC->Eval(dAC); |
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} |
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} |
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} |
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if(Nthcard>*ncar){ |
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cout<<"*** ERROR AC! Nthcard= "<<Nthcard<<" out of range!"<<endl; |
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for(i=0;i<4;i++)SumEcard[i]=2*thr; |
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} |
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else{ |
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for(Int_t k= 0;k<Nthcard;k++){ |
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if(Icard[i]>0 && Icard[i]<5)SumEcard[Icard[k]-1] += Erelcard[k]; |
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} |
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} |
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|
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// channel mapping Hit Map |
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// 1 CARD4 0 LSB |
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// 2 CAT2 0 |
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// 3 CAS1 0 |
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// 4 NC 0 |
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// 5 CARD2 0 |
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// 6 CAT4 1 |
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// 7 CAS4 0 |
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// 8 NC 0 |
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// 9 CARD3 0 |
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// 10 CAT3 0 |
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// 11 CAS3 0 |
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// 12 NC 0 |
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// 13 CARD1 0 |
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// 14 CAT1 0 |
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// 15 CAS2 0 |
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// 16 NC 0 MSB |
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|
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// In the first version only the hit-map is filled, not the SR. |
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|
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fDataAC[3] = 0x0000; |
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|
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if (SumEcas[0] > thr) fDataAC[3] = 0x0004; |
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if (SumEcas[1] > thr) fDataAC[3] += 0x4000; |
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if (SumEcas[2] > thr) fDataAC[3] += 0x0400; |
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if (SumEcas[3] > thr) fDataAC[3] += 0x0040; |
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|
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if (SumEcat[0] > thr) fDataAC[3] += 0x2000; |
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if (SumEcat[1] > thr) fDataAC[3] += 0x0002; |
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if (SumEcat[2] > thr) fDataAC[3] += 0x0200; |
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if (SumEcat[3] > thr) fDataAC[3] += 0x0020; |
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|
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if (SumEcard[0] > thr) fDataAC[3] += 0x1000; |
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if (SumEcard[1] > thr) fDataAC[3] += 0x0010; |
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if (SumEcard[2] > thr) fDataAC[3] += 0x0100; |
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if (SumEcard[3] > thr) fDataAC[3] += 0x0001; |
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|
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fDataAC[67] = fDataAC[3]; |
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|
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// shift registers |
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// the central bin is equal to the hitmap, all other bins in the shift register are 0 |
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for (UInt_t i=0; i<=15; i++){ |
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fDataAC[i+11] = 0x0000; |
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fDataAC[i+75] = 0x0000; |
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} |
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fDataAC[18] = fDataAC[3]; |
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fDataAC[82] = fDataAC[3]; |
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|
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// for (Int_t i=0; i<fACbuffer; i++){ |
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// printf("%0x ",fDataAC[i]); |
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// if ((i+1)%8 ==0) cout << endl; |
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// } |
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}; |
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