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center the atof at z=0 #579

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Merged
N-Plx merged 1 commit into from
Apr 19, 2025
Merged

center the atof at z=0 #579

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9 changes: 5 additions & 4 deletions ...-tools/clas-geometry/src/main/java/org/jlab/geom/detector/alert/ATOF/AlertTOFFactory.java
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Original file line number Diff line number Diff line change
Expand Up @@ -95,8 +95,9 @@ public AlertTOFLayer createLayer(ConstantProvider cp, int sectorId, int superlay
double pad_b1 = 8.17369; // mm
double pad_b2 = 10.27; // mm

double pad_z = 279.7; // mm
if (superlayerId == 1) pad_z = 27.7; // mm
double atof_length = 279.7; // mm
double pad_z = atof_length; // For the bar
if (superlayerId == 1) pad_z = 27.7; // mm, for the wedges 10*27.7 + 9*0.3

// trapezoide dimensions for a smaller paddle (internal)
double small_pad_b1 = 7.85924; // mm
Expand Down Expand Up @@ -134,8 +135,8 @@ public AlertTOFLayer createLayer(ConstantProvider cp, int sectorId, int superlay
for (int padId = 0; padId < current_ncomponents; padId++) {

//Component index increases with increasing z
double len_b = padId * pad_z + padId * gap_pad_z; // back paddle plan
double len_f = len_b + pad_z; // front paddle plan
double len_b = padId * pad_z + padId * gap_pad_z - atof_length/2; // back paddle plan, centered at z = 0
double len_f = len_b + pad_z - atof_length/2; // front paddle plan, centered at z = 0

Point3D p0 = new Point3D(-dR / 2, -widthBl / 2, len_f);
Point3D p1 = new Point3D(dR / 2, -widthTl / 2, len_f);
Expand Down