The raw.root files contain microtracks. Following information copied mostly from FEDRA wiki:
Run file information
Inside the run file there are following objects:
Run file header (EdbRunHeader)
Views tree with the data
Fiducial marks (now obsolete, used in OPERA)
One entry into the tree is one microscope view. All data inside the view are in local View Reference System. The information about the view position in respect to stage (plate) kept in the view header.
There are the following superbranches in the Views tree:
headersGeneral information about view position and contentsclustersarray of clusters: all clusters fond in the view are heresegmentsarray of segments: all segments found in the viewtracksnot used nowframesinformation about each frame and eventually image (image usually do not saved)
View Headers branch
Header is one/view. The header object of the type EdbViewHeader:
class EdbViewHeader : public TObject {
private:
Int_t eViewID; // View ID in the Area
Int_t eAreaID; // Area ID in Run (prediction id)
Float_t eXview; // stage coord, top left corner
Float_t eYview; //
Float_t eZ1; //
Float_t eZ2; // emulsion surfaces in absolute stage coordinates
Float_t eZ3; // measured once per view
Float_t eZ4; //
Int_t eNframesTop; // top | number of frames in the view (0,1,2...16...)
Int_t eNframesBot; // bottom |
Int_t eTime; // System time since last view saving in msec
Int_t eNclusters; // number of clusters saved in the view
Int_t eNsegments; // number of segments saved in the view
EdbAffine2D eAff; // affine transformation for the view
// (make sence for SySal-converted data only)
TArrayF *eZlevels; //! z of each taken view (frame) (obsolete!)
Int_t eCol; // the position of the view in the scanned area, measured in views,
Int_t eRow; // starting from the reference angle (typically up-left)
Int_t eStatus; // View scanning status
Int_t eEvent //optional: the part of the tree may be associated with event. Setted via run->header->Flag(8)
Int_t eTrack //optional: some view group may be associated with track. Setted via run->header->Flag(9)
Clusters branch
All clusters of the view organized as one TClonesArray of the objects type EdbCluster:
class EdbCluster : public TObject, public EdbPoint3D {
public:
Float_t eX; // cluster coordinates (in microns when converted from rwd)
Float_t eY; //
Float_t eZ; //
Float_t eArea; // Cluster area: number of pixels
Float_t eVolume; // Cluster volume - in case of greyscale pixels
Int_t eFrame; // frame index
Int_t eSide; // emulsion side index
Int_t eSegment; // segment id to be attached (-1 if no segment)
Segments branch
All segments of the view organized as one TClonesArray of the objects type EdbSegment.
Note: the segments here are what we call micro-tracks!
class EdbSeg3D : public TObject {
private:
Float_t eX0; // |_coordinates of the segment's initial point
Float_t eY0; // | in the SAME FOR ALL SEGMENTS stage coordinate system
Float_t eZ0; // |
Float_t eTx; // tanX: deltaX/deltaZ
Float_t eTy; // tanY: deltaY/deltaZ
Float_t eDz; // length of the segment along Z with sign
//______________________________________________________________________________
class EdbSegment : public EdbSeg3D {
private:
Int_t eSide; // side of the segment location (0-up, 1-down)
Int_t ePuls; // puls height (number of clusters) OR (sum of clust area)*1000+(number of clusters)
Int_t eID; // segment identifier
Float_t eSigmaX; // dispersion parameter of grains around track line
Float_t eSigmaY; // dispersion parameter of grains around track line
When data converted from Sysal rwd the eSigmaX is filled with SIGMA provided by sysal, eSigmaY in this case dummy
Frames branch
All frames of the view organized as one TObjArray of the objects type EdbFrame
Note: the frames are the images at different heights, for each xy view there are multiple frames!
class EdbFrame : public TObject {
private:
Int_t eFrameID; // frame identifier
Float_t eZframe; // Z-coordinate of the frame
Int_t eNcl; // total number of clusters found in the frame
Int_t eNpix; // total number of nonzero pixels found in the frame
EdbImage *eImage; // CCD image