SPOTBEAM

 The SPOTBEAM card is used in conjunction with SPOTDIR, SPOTPOS, SPOTTIME,
 and SPOTTRAN to define multiple beam spots. A new primary is created randomly 
 in any of the listed beam spots according to their respective weight
 or in sequential order (see SPECSOUR).

 Warning : These five cards are activated by indicating 
SDUM
 = BEAMSPOT
 in the  SPECSOUR card. Barring this, the spot cards will be discarded.

 See also SPOTDIR, SPOTPOS, SPOTTIME, SPOTTRAN

    
WHAT(1)
 !=0.0 :  particle id (Paprop) or A + 1000 Z + 100000 m for heavy ion beams
            = 0.0 :  particle id as per BEAM card
            =-99999: special code for printout (see what(6))
              
Default
: 0.0

    
WHAT(2)
 > 0.0 : Beam laboratory momentum (GeV/c) (total, not per nucleon!)
            < 0.0 : 
WHAT(2)
 is the beam laboratory kinetic energy/n (GeV/n)
            = 0.0 : Beam momentum as per BEAM card
              
Default
: 0.0

    
WHAT(3)
 >=0.0 : Beam spot weight (number of particles)
            < 0.0 : Stops the code

    
WHAT(4)
 > 0.0 : Rectangular (total) momentum spread (GeV/c)
            < 0.0 : Gaussian (total) momentum spread. 
WHAT(4)
 is the
                    FWHM (GeV/c)
            = 0.0 : No momentum spread
              
Default
: 0.0

    
WHAT(5)
 > 0.0 : Rectangular angular X divergence of the beam (mrad)
            < 0.0 : Gaussian angular X divergence. 
WHAT(5)
 is the FWHM (mrad)
            = 0.0 : No angular X divergence
              
Default
: 0.0

    
WHAT(6)
 > 0.0 : Rectangular angular Y divergence of the beam (mrad)
            < 0.0 : Gaussian angular Y divergence. 
WHAT(6)
 is the FWHM (mrad)
            = 0.0 : No angular Y divergence
              
Default
: 
WHAT(5)


    
SDUM
 :  Beam spot number (free format)
              
Default
: n+1 where n is the number of the last previously defined spot

    For 
WHAT(1)
 = -99999

    WHAT(2-5)     : not used

    
WHAT(6)
 > 0.0 : (All) beam spot infos are printed on the output
            < 0.0 : resets to default (no printout)
            = 0.0 : ignored
              
Default
: -1.0

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