Update magnet_v22a and b

magnet_v22b has top volume redefined as an assembly. Magnet materials
are defined with explicit tag. Materials are defined in gdml script
to make correct radlen and intlen declaration in case future material
budget maps need to be generated.

magnet/magnet_v22a.info

@@ -17,6 +17,6 @@ The clamps are elongated in x but the positioning is maintained.
 Default geometry to be used as the clamps are to be used with and without the rich detector.
 The only acception when the MUCH is used when the other magent geometry is to be used.
 
-
+Unique materials are now defined inside the gdml script which is also copied to the media.geo
 
 

magnet/magnet_v22b.info

@@ -15,6 +15,6 @@ It enlarges the width of the apperature and entire gometry by 30cm in the x dire
 It enlarges the height of the apperature and entire yoke by 3cm in the y direction (height).
 The clamps are elongated in x but the positioning is maintained.
 
-
+Materials are now explicitly defined in the gdml script.
 
 

media.geo

@@ -1253,6 +1253,30 @@ RICHPad           -2  12.01  1.00797  6.  1.  .717e-3  1  4
                    9.393         0.0     1.0    1.00051
                    9.538         0.0     1.0    1.00051
 
+
+
+// ---------------------  MATERIALS USED IN THE MAGNET (DEFINED ALSO IN GDML HEADER ) ----------------------------------
+
+MAG_Iron           1  55.847  26.  7.874
+                   0  1  20.  .001
+                   0
+
+
+MAG_Copper             1  63.546  29.  8.96
+                   0  1  20.  .001
+                   0
+
+MAG_Air            1  14.6873  7.32  0.001205
+                   0  1  20.  .001
+                   0
+
+MAG_Vacuum         1  1.0  0.5  0.000000001
+                   0  1  20.  .001
+                   0
+
+
+// ---------------------  MATERIALS USED IN THE MUCH --------------------------------------------------------------------
+
 MUCHiron           1  55.847  26.  7.87
                    0  1  20.  .001
                    0