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much_v22a_jpsi.geo.info 2.18 KiB
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MUCH geometry created with create_MUCH_geometry_v21a_lmvm.C

Global Variables: 
MuchCave Zin position = 125 cm 
Acceptance tangent min = 0.1
Acceptance tangent max = 0.466

                     Absorbers 
                    -----------
Total No. of Absorbers: 5
First abosrber is divided into two halves.
First half inserted inside the Dipole Magnet.
Second half is made of Low Density Graphite + Concrete.
Total No. of Pieces: 7

AbsPieces   Position[cm]   Thickness[cm]        Material
--------------------------------------------------------------
   1		133		16		LD Graphite
   2		147		12		LD Graphite
   3		168		30		Concrete
   4		225		20		Iron
   5		275		20		Iron
   6		330		30		Iron
   7		427		100		Iron_fifth

                     Shielding 
                    -----------
No. of Shields: 6
Inside the Abs I, Shielding divided into two parts.

Shield No.   Z_In[cm]  Z_Out[cm]  R_In[cm]  R_Out[cm]   Material
--------------------------------------------------------------
   0		125	  153	7.375	   12.4999	  Al
   1		153	  183	8.579	   15.2999	  Pb
   2		215	  235	12.965	   21.4999	  Al
   3		265	  285	15.515	   26.4999	  Al
   4		315	  345	18.065	   31.4999	  Al
   5   		377    	  477   25.00      25.00   	  Al

                     Stations 
                    ----------
No. of Stations: 4
First two stations (1,2) are made up of GEM and last two stations (3,4) are made up of RPC.
Passive material implemented in GEM modules. Ar:CO2 (70:30) is used as active gas. 
12 mm thick Al plates are used for support and cooling in the GEM modules.
2 mm thick Aluminum plates are used for support in the RPC modules behind the active area. 10 mm thick Aluminium at the boundaries as the frame.
Drift and read-out PCBs (copper coated G10 plates) inserted for realistic material budget for both GEM and RPC modules.
#Station   #Layers     Z[cm] #Sectors ActiveLz[cm]
--------------------------------------------------------------
   1	      1		190	16	0.3
   1	      2		200	16	0.3
   1	      3		210	16	0.3
   2	      1		240	20	0.3
   2	      2		250	20	0.3
   2	      3		260	20	0.3
   3	      1		290	18	0.2
   3	      2		300	18	0.2
   3	      3		310	18	0.2
   4	      1		350	20	0.2
   4	      2		360	20	0.2
   4	      3		370	20	0.2