Bank MCNI

                          MCNI      NCD Ionisation deposition
                          ===================================
 
    Contact:  D. Wark
 
    Revision History:-
    ================
 
    5.00  D. Wark     First version.
          H.S. Wan    Added mnemonics and removed unused words.


 
Description
-----------

These banks hold information about charge deposited within the NCDs.  There 
is one bank for  each piecewise straight section of charge deposit with 
constant charge density. The number (and hence the length) of MCNI segments 
for alphas, tritons, protons and electrons can be adjusted. 

 
Reference Links
---------------
 
 -1  -KMCNI_MCNT   MCNT  The track that this MCNI corresponds to.
                         

Structural Links
----------------
 
   None.
                         
 
Status Bits
-----------
 
Note: Any status bit parameters are defined to work with bit functions such as
      IAND and BTEST.
 
Data Words
----------
 
    Data types: B(bit), I, F, D(double), H(hollerith 4 char)
 
 +1    F  KMCNI_START_PSX       Start position X.
 +2    F  KMCNI_START_PSY       Start position Y.
 +3    F  KMCNI_START_PSZ       Start position Z.
 +4    D  KMCNI_START_TIM       Start time in nsecs since MC generation time (in MC bank). First word.
 +5    D                        Second word.
 +6    F  KMCNI_END_PSX         End position X.
 +7    F  KMCNI_END_PSY         End position Y.
 +8    F  KMCNI_END_PSZ         End position Z.
 +9    D  KMCNI_END_TIM         End time in nsecs since MC generation time (in MC bank). First word.
 +10   D                        Second word.
 +11   F  KMCNI_CHARGE_DEPOSIT  Charge deposited in the segment. See note 1.
 +12   F  KMCNI_START_RADIUS    Radius of the segment in the counter just after ionization. See note 2. 
 +13   F  KMCNI_DRIFT_TIME      Time taken for segment to drift to the anode. See note 3. 
 +14   F  KMCNI_GAIN            The gas gain for this charge segment. See note 4.

Notes
-----

1)   For electrons the energy deposited is calculated using EGS4; for 
     protons, tritons and alphas DE/DX tables are used. 

2)   The radius of the segment means the distance of the midpoint of 
     the segment from the anode wire.
   
3)   This is the time taken for a point charge at the midpoint of the 
     segment to drift to the anode. 
     
4)   When space charge is simulated, this might not be the same for 
     different segments.