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Please consider the following formatting changes to #14415 #7

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27aef63
should use the total eff but not only seed
ChunzhengLab Jun 19, 2025
17e14c1
Please consider the following formatting changes
alibuild Jun 23, 2025
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25 changes: 14 additions & 11 deletions Detectors/Upgrades/ITS3/macros/test/CheckChipResponseFile.C
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Original file line number Diff line number Diff line change
Expand Up @@ -57,25 +57,25 @@ void LoadRespFunc()
std::string AptsFile = "$(O2_ROOT)/share/Detectors/Upgrades/ITS3/data/ITS3ChipResponseData/APTSResponseData.root";
std::string AlpideFile = "$(O2_ROOT)/share/Detectors/ITSMFT/data/AlpideResponseData/AlpideResponseData.root";

std::cout<<"=====================\n";
std::cout << "=====================\n";
LOGP(info, "ALPIDE Vbb=0V response");
mAlpSimResp0 = loadResponse(AlpideFile, "response0"); // Vbb=0V
mAlpSimResp0->computeCentreFromData();
mAlpSimResp0->print();
LOGP(info, "Response Centre {}", mAlpSimResp0->getRespCentreDep());
std::cout<<"=====================\n";
std::cout << "=====================\n";
LOGP(info, "ALPIDE Vbb=-3V response");
mAlpSimResp1 = loadResponse(AlpideFile, "response1"); // Vbb=-3V
mAlpSimResp1->computeCentreFromData();
mAlpSimResp1->print();
LOGP(info, "Response Centre {}", mAlpSimResp1->getRespCentreDep());
std::cout<<"=====================\n";
std::cout << "=====================\n";
LOGP(info, "APTS response");
mAptSimResp1 = loadResponse(AptsFile, "response1"); // APTS
mAptSimResp1->computeCentreFromData();
mAptSimResp1->print();
LOGP(info, "Response Centre {}", mAptSimResp1->getRespCentreDep());
std::cout<<"=====================\n";
std::cout << "=====================\n";
}

std::vector<float> getCollectionSeediciencies(o2::its3::ChipSimResponse* resp,
Expand All @@ -85,7 +85,7 @@ std::vector<float> getCollectionSeediciencies(o2::its3::ChipSimResponse* resp,
bool flipRow = false, flipCol = false;
for (auto depth : depths) {
auto rspmat = resp->getResponse(0.0, 0.0,
um2cm(depth) + resp->getDepthMin() + 1.e-9,
um2cm(depth) + 1.e-9,
flipRow, flipCol);
seed.push_back(rspmat ? rspmat->getValue(2, 2) : 0.f);
}
Expand All @@ -99,7 +99,7 @@ std::vector<float> getShareValues(o2::its3::ChipSimResponse* resp,
bool flipRow = false, flipCol = false;
for (auto depth : depths) {
auto rspmat = resp->getResponse(0.0, 0.0,
um2cm(depth) + resp->getDepthMin() + 1.e-9,
um2cm(depth) + 1.e-9,
flipRow, flipCol);
float s = 0;
int npix = resp->getNPix();
Expand All @@ -121,7 +121,7 @@ std::vector<float> getEffValues(o2::its3::ChipSimResponse* resp,
bool flipRow = false, flipCol = false;
for (auto depth : depths) {
auto rspmat = resp->getResponse(0.0, 0.0,
um2cm(depth) + resp->getDepthMin() + 1.e-9,
um2cm(depth) + 1.e-9,
flipRow, flipCol);
float s = 0;
int npix = resp->getNPix();
Expand All @@ -140,9 +140,12 @@ void CheckChipResponseFile()
LoadRespFunc();
LOG(info) << "Response function loaded" << std::endl;

std::vector<float> vecDepth(50);
for (int i = 0; i < 50; ++i)
vecDepth[i] = i;
std::vector<float> vecDepth;
int numPoints = 100;
for (int i = 0; i < numPoints; ++i) {
float value = -50 + i * (100.0f / (numPoints - 1));
vecDepth.push_back(value);
}

int colors[] = {kOrange + 7, kRed + 1, kAzure + 4};
struct RespInfo {
Expand All @@ -156,7 +159,7 @@ void CheckChipResponseFile()
{mAlpSimResp1, "ALPIDE Vbb=-3V", colors[2]}};

TCanvas* c1 = new TCanvas("c1", "c1", 800, 600);
TH1* frame = c1->DrawFrame(-1, -0.049, 50, 1.049);
TH1* frame = c1->DrawFrame(-50, -0.049, 50, 1.049);
frame->SetTitle(";Depth(um);Charge Collection Seed / Share / Eff");
TLegend* leg = new TLegend(0.15, 0.5, 0.4, 0.85);
leg->SetFillStyle(0);
Expand Down
73 changes: 39 additions & 34 deletions Detectors/Upgrades/ITS3/simulation/src/ChipSimResponse.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -25,61 +25,66 @@ void ChipSimResponse::initData(int tableNumber, std::string dataPath, const bool

void ChipSimResponse::computeCentreFromData()
{
std::vector<float> zVec, qVec;
const int npix = o2::itsmft::AlpideRespSimMat::getNPix();
std::vector<float> zVec, effVec;
zVec.reserve(mNBinDpt);
effVec.reserve(mNBinDpt);

for (int iz = 0; iz < mNBinDpt; ++iz) {
size_t bin = iz + mNBinDpt * (0 + mNBinRow * 0);
const auto& mat = mData[bin];
float val = mat.getValue(npix / 2, npix / 2);
float gz = mDptMin + iz / mStepInvDpt;
zVec.push_back(gz);
qVec.push_back(val);
int rev = mNBinDpt - 1 - iz;
float z = mDptMin + iz / mStepInvDpt;
float sum = 0.f;
const auto& mat = mData[rev];
for (int ix = 0; ix < npix; ++ix) {
for (int iy = 0; iy < npix; ++iy) {
sum += mat.getValue(ix, iy);
}
}
zVec.push_back(z);
effVec.push_back(sum);
}

std::vector<std::pair<float, float>> zqPairs;
for (size_t i = 0; i < zVec.size(); ++i) {
zqPairs.emplace_back(zVec[i], qVec[i]);
}
std::sort(zqPairs.begin(), zqPairs.end());
zVec.clear();
qVec.clear();
for (auto& p : zqPairs) {
zVec.push_back(p.first);
qVec.push_back(p.second);
}
struct Bin {
float z0, z1, q0, q1, dq;
};
std::vector<Bin> bins;
bins.reserve(zVec.size() - 1);

struct BinInfo { float z0, z1, q0, q1, dq; };
std::vector<BinInfo> bins;
float totQ = 0.f;
for (size_t i = 0; i + 1 < zVec.size(); ++i) {
float z0 = zVec[i], z1 = zVec[i + 1];
float q0 = qVec[i], q1 = qVec[i + 1];
float dz = z1 - z0;
float dq = 0.5f * (q0 + q1) * dz;
float q0 = effVec[i], q1 = effVec[i + 1];
float dq = 0.5f * (q0 + q1) * (z1 - z0);
bins.push_back({z0, z1, q0, q1, dq});
totQ += dq;
}
if (totQ <= 0.f) { mRespCentreDep = 0.f; return; }

if (totQ <= 0.f) {
mRespCentreDep = mDptMin;
return;
}

float halfQ = 0.5f * totQ;
float cumQ = 0.f;
for (const auto& b : bins) {
if (cumQ + b.dq < halfQ) { cumQ += b.dq; continue; }
float qSlope = (b.q1 - b.q0) / (b.z1 - b.z0);
for (auto& b : bins) {
if (cumQ + b.dq < halfQ) {
cumQ += b.dq;
continue;
}
float dz = b.z1 - b.z0;
float A = qSlope * 0.5f;
float B = b.q0;
float C = cumQ - halfQ;
float disc = B * B - 4.f * A * C;
float slope = (b.q1 - b.q0) / dz;
float disc = b.q0 * b.q0 - 2.f * slope * (cumQ - halfQ);

float x;
if (disc >= 0.f && std::abs(A) > 1.e-12f)
x = (-B + std::sqrt(disc)) / (2.f * A);
else
if (disc >= 0.f && std::abs(slope) > 1e-6f) {
x = (-b.q0 + std::sqrt(disc)) / slope;
} else {
x = (halfQ - cumQ) / b.q0;
}
x = std::clamp(x, 0.f, dz);
mRespCentreDep = b.z0 + x;
return;
}

mRespCentreDep = mDptMax;
}