Skip to content

Make AHDC vz shift depending on the torus configuration #1340

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
baltzell merged 4 commits into from
Jul 9, 2026
Merged

Make AHDC vz shift depending on the torus configuration #1340

Changes from all commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
e61d6b6
set the clas_alignment depending on the torus configuration
ftouchte Jul 7, 2026
df01186
Merge branch 'development' into forward-vz-peak
ftouchte Jul 9, 2026
511400f
vz shift is defined with respect to CLAS
ftouchte Jul 9, 2026
8a0d5ae
Merge branch 'development' into forward-vz-peak
baltzell Jul 9, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
40 changes: 24 additions & 16 deletions reconstruction/alert/src/main/java/org/jlab/service/alert/ALERTEngine.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -524,8 +524,12 @@ public boolean processDataEventUser(DataEvent event) {
if (!event.hasBank("AHDC::track")) {return false;}
if (!event.hasBank("AHDC::hits")) {return false;}

/// tmp: misalignement with respect to the center of the AHDC (mm)
double clas_alignement = +75;
/// vz shift with respect to the center of the CLAS (mm)
double torus = runBank.getFloat("torus", 0);
// inbending --> torus -1 --> 10.6 GeV run
// outbending --> torus +1 --> 2.24 GeV run
double vz_shift = (torus > 0) ? -67 : -36 ;
// atof vz shift with respect to the AHDC
double atof_alignement = 0;

/// Read the electron vertex
Expand All @@ -538,17 +542,21 @@ public boolean processDataEventUser(DataEvent event) {
if (recBank.getInt("pid", row) == 11) {
vz_electron = 10*recBank.getFloat("vz",row); // conversion in mm
IsVertexDefined = true;


//double px = recBank.getFloat("px",row);
//double py = recBank.getFloat("py",row);
//double pz = recBank.getFloat("pz",row);
//double p = Math.sqrt(px*px+py*py+pz*pz);
//double theta = Math.acos(pz/p);

// set the resolutions on r and z! to be done
vz_error2[0] = 0.09; // should depend on p and theta
vz_error2[2] = 64; // should depend on p and theta

int status = recBank.getShort("status", row);

// If the electron is not from the FT, we can assign a finite resolution
if (Math.abs(status) / 1000 != 1) {
//double px = recBank.getFloat("px",row);
//double py = recBank.getFloat("py",row);
//double pz = recBank.getFloat("pz",row);
//double p = Math.sqrt(px*px+py*py+pz*pz);
//double theta = Math.acos(pz/p);

// set the resolutions on r and z! to be done
vz_error2[0] = 0.09; // should depend on p and theta
vz_error2[2] = 64; // should depend on p and theta
}

break; // only look at the first electron
}
Expand Down Expand Up @@ -605,7 +613,7 @@ public boolean processDataEventUser(DataEvent event) {

/// Associate the electron vertex (the beamline hit) to each track
boolean IsMC = event.hasBank("MC::Particle");
double vz_constraint = vz_electron + (IsMC ? 0 : clas_alignement); // we don't have the misalignment in simulation
double vz_constraint = vz_electron - (IsMC ? 0 : vz_shift); // we don't have the misalignment in simulation, to be checked again !
for (Track track : AHDC_tracks) {
RadialKFHit hit_beam = new RadialKFHit(0, 0, vz_constraint);
RealMatrix measurementNoise = new Array2DRowRealMatrix(
Expand All @@ -630,7 +638,7 @@ public boolean processDataEventUser(DataEvent event) {
double x = bank_ATOFHits.getFloat("x", row);
double y = bank_ATOFHits.getFloat("y", row);
double z = bank_ATOFHits.getFloat("z", row);
z += atof_alignement; // there is a shift between AHDC and ATOF (still don't know why) !
z += atof_alignement;
RadialKFHit hit = new RadialKFHit(x, y, z);
// error on r
double wedge_width = 20; //mm
Expand Down Expand Up @@ -696,7 +704,7 @@ public boolean processDataEventUser(DataEvent event) {
double x = bank_ATOFHits.getFloat("x", row);
double y = bank_ATOFHits.getFloat("y", row);
double z = bank_ATOFHits.getFloat("z", row);
z += atof_alignement; // there is a shift between AHDC and ATOF (still don't know why) !
z += atof_alignement;
RadialKFHit hit = new RadialKFHit(x, y, z);
// error on r
double wedge_width = 20; //mm
Expand Down
Loading