Endcap Geometry

Geometry definition

1. Detailed description of the geometry (ver 5.1) as implemented by
   Oleg Rogachevski are listed in the depth.txt file
2. Distribution of material as fuction of eta and phi
3. Mapping of SMD strips to towers (11/20/03 jwebb)

Geant pictures of calorimeter are generated with plot_geom.kumac

1. View of EndCap caloremeter (variant C) in STAR detector
   

2. cross section of calorimeter towers variant C
   

3. cross section of lower half of calorimeter plane ZY at X=0
   

4. cross section of calorimeter (var.C) plane ZY at X=30cm
   

5. cross section at eta=2.0front part with SMD
   
   line eta = 2.0 intersects megatile (blue) at its center
   and radiators (black) at forward edge.
   Hub is seen at upper edge. Each megatile extends from eta=2 to hub
   as nonactive plastic and radiator extends as stainless steel.

6. cross section at eta=1.086 front part with SMD
   
   line eta = 1.086 intersects megatile at its center
   and radiators at the back edge of radiator
   Projective (20x25 mm) bar is seen at the lower edge of calorimeter
   XXX page 9 - megatile cell structure in local coordinates, particles go along Y axis on this plot.

7. regular SMD sector, V plane, blue line depicts +-15 deg. between sectors
   

8. edge SMD sector with cutted strips, V plane
   

9. cross section of 1st SMD plane
   

10. cross section of 2st SMD plane
    

11. cross section of 3st SMD plane
    

12. cross section of 1st SMD plane labeled with "SUV" ordering
    

13. cross section of the gap between SMD sectors
    

14. cross section of the gap between tower at the sector boundary
    

15. cross section of the backplate
    

Three variants of EEMC geometry are available:
A --- lower half with only 5-8 sectors filled with scintillators
B --- fully filled lower half
C --- both halves filled with scintillators