The Track Common Block - fgscitrk.ch

/*-- FORTRAN section --*/
      integer fgntrksci         ! number of tracks in scifi 
      integer fgtfgmidsci       ! fragment id for each scifi track
      integer fgflagtrksci      ! flags for each scifi track
      real    fggdtrksci        ! goodness of track fit
      real    fgzstrtrksci      ! z_0 for each track
      real    fgzstptrksci      ! z_1 for each track
      real    fgxy0trksci       ! xy_0 for each track
      real    fgslptrksci       ! slope for each track
      integer fgntvtxsci        ! number of vertices for each track
      integer fgtvtxidsci       ! vertex id for each track
c
      common / fgtracksci / fgntrksci,fgtfgmidsci(2,FGMXTRSCI),
     +     fgflagtrksci(FGMXTRSCI),fggdtrksci(FGMXTRSCI),
     +     fgzstrtrksci(FGMXTRSCI),fgzstptrksci(FGMXTRSCI),
     +     fgxy0trksci(2,FGMXTRSCI),fgslptrksci(2,FGMXTRSCI),
     +     fgntvtxsci(FGMXTRSCI),fgtvtxidsci(FGMXVXSCI,FGMXTRSCI)

/*-- C section --*/
typedef struct
 { int   ntrk; /* number of tracks in scifi */
   int   tfgmid[FGMXTRSCI][2]; /* fragment id for each scifi track */
   int   flagtrk[FGMXTRSCI]; /* flags for each scifi track */
   float gdtrk[FGMXTRSCI]; /* goodness of track fit */
   float zstrtrk[FGMXTRSCI]; /* z_0 for each track */
   float zstptrk[FGMXTRSCI]; /* z_1 for each track */
   float xy0trk[FGMXTRSCI][2]; /* xy_0 for each track */
   float slptrk[FGMXTRSCI][2]; /* slope for each track */
   int   ntvtx[FGMXTRSCI]; /* number of vertices for each track */
   int   tvtxid[FGMXTRSCI][FGMXVXSCI]; /* vertex id for each track */
 } FGTRACKSCI_COM;
#define FGTRACKSCI COMMON_BLOCK(FGTRACKSCI,fgtracksci)
COMMON_BLOCK_DEF(FGTRACKSCI_COM,FGTRACKSCI);

Flag of SciFi track ( fgflagtrksci) is as follows:

	value	description
a.	0	good track
b.	fgfrgmflag(for Y)*100	(See Fig. 5)
	+ fgfrgmflag(for X)
c.	-iproj	single fragment track in iproj-projection
d.	-(iproj+10)	single fragment track (found in 2ndary track
		finding) in iproj-projection
e.	-10	tracks found in 2ndary track finding

 

Here,

a

is good track(good correspondence between X and Y flagment) and found in the first track finding.

b

is good track but one fragment(X or Y) may pass the bundle part or dead IIT region.

c

is one fragment track(in fact, not allowed in present tracker)

d

is one fragment track which is found in the 2ndary track finding using vertex information(mostly short tracks-2 or 3hit track)

e

is good track but found in 2ndary track finding using vertex information(mostly short tracks-2 or 3 hit track)

and fgfrgmflag:

10

: if the fragment reaches the fiducial boundary(to the bundle side) at up-stream

20

: if the fragment reaches the fiducial boundary(to the bundle side) at down-stream

1

: the extrapolation of fragment is in the dead layer at up-stream

2

: the extrapolation of fragment is in the dead layer at down-stream

c*****Bundle hit******************************************************************
c*          TOP(X)          SIDE(Y)                TOP(X)          SIDE(Y)       *
c*                                                                               *
c*       ::::::::::                             ::::::::::                       *
c*       ::::::::::                             ::::::::::                       *
c*     |~~~~~~~~~~~~|   |~~~~~~~~~~~~|        |~~~~~~~~~~~~|   |~~~~~~~~~~~~|    *
c* Nu  |            |   |frgmflag=20 |        |            |   |frgmflag=10 |    *
c* --> |  -------   |   |            |   -->  |  -----     |   |      /     |    *
c*     |            |   |  \         |        |            |   |     /      |    *
c*     |____________|   |___\________|        |____________|   |____/_______|    *
c*                        ::::::::::                             ::::::::::      *
c*                        ::::::::::                             ::::::::::      *
c*                  +2000                                  +1000                 *
c*                                                                               *
c*       ::::::::::                             ::::::::::                       *
c*       ::::::::::                             ::::::::::                       *
c*     |~~~~/~~~~~~~|   |~~~~~~~~~~~~|        |~~~~\~~~~~~~|   |~~~~~~~~~~~~|    *
c*     |   /        |   |            |        |     \      |   |            |    *
c* --> |            |   |  -----     |   -->  |      \     |   | --------   |    *
c*     |frgmflag=20 |   |            |        | frgmflag=10|   |            |    *
c*     |____________|   |____________|        |____________|   |____________|    *
c*                        ::::::::::                             ::::::::::      *
c*                        ::::::::::                             ::::::::::      *
c*                  +20                                    +10                   *
c*                                                                               *
c*****Dead Layer******************************************************************
c*                                                                               *
c*       ::::::::::                             ::::::::::                       *
c*       ::::::::::      frgmflag=1             ::::::::::      frgmflag=2       *
c*     |~~~|~~~~~~~~|   |~~~|~~~~~~~~|        |~~~|~~~~~~~~|   |~~~|~~~~~~~~|    *
c*     |___|        |   |___|        |        |___|        |   |___|  \     |    *
c* --> |   ------   |   |   \        |   -->  |      ----  |   |       \    |    *
c*     |        |~~~|   |    \   |~~~|        |         |~~|   |        |~~~|    *
c*     |________|___|   |________|___|        |_________|__|   |________|___|    *
c*                        ::::::::::                             ::::::::::      *
c*                        ::::::::::                             ::::::::::      *
c*                 +100                                    +200                  *
c*                                                                               *
c*       ::::::::::                             ::::::::::                       *
c*       ::::::::::                             ::::::::::                       *
c*     |~~~|~~~~~~~~|   |~~~|~~~~~~~~|        |~~~|~~~~~~~~|   |~~~|~~~~~~~~|    *
c*     |___|\       |   |___|        |        |___|  \     |   |___|        |    *
c* --> |     \      |   |  -----     |   -->  |       \    |   |     -----  |    *
c*     |        |~~~|   |        |~~~|        |        \|~~|   |        |~~~|    *
c*     |________|___|   |________|___|        |_________|__|   |________|___|    *
c*      frgmflag=1        ::::::::::           frgmflag=2        ::::::::::      *
c*                        ::::::::::                             ::::::::::      *
c*                 +1                                       +2                   *
c*                                                                               *
c*********************************************************************************

Figure 5: Contribution to fgflgtrksci in case of b