SYNCRAD

     Activates synchrotron radiation emission for selected charged particles

     See also ASSIGNMAT


     For 
SDUM
 = BMAX-REG (see note 1)  below), compulsory when the magnetic
                field is not constant and uniform, and or anyway is provided
                by a magfld.f routine:

     
WHAT(1)
 = Maximum magnetic field intensity (T) in the regions defined by
               WHAT(4-6), no default

     
WHAT(2)
 = not used

     
WHAT(3)
 = not used

     
WHAT(4)
 = lower bound (or name corresponding to it) of the region indices
               with maximum magnetic field intensity corresponding to 
WHAT(1)
.
               ("From region 
WHAT(4)
...")
               
Default
 = 2.0

     
WHAT(5)
 = upper bound (or name corresponding to it) of the region indices
               with maximum magnetic field intensity corresponding to 
WHAT(1)
.
               ("...to region 
WHAT(5)
...")
               
Default
 = 
WHAT(4)

     
WHAT(6)
 = step length in assigning indices
               ("...in steps of 
WHAT(6)
")
               
Default
 = 1.0

     
SDUM
    = BMAX-REG


     For 
SDUM
 = SYPRONLY, SYNCRALL, or null:

     
WHAT(1)
 > 0 : Synchrotron radiation emission activated for the particles
                   defined by 
WHAT(4)
, (5), and (6), down to the photon energy
                   threshold given by 
WHAT(1)
 (GeV)
             < 0 : Synchrotron radiation emission de-activated for the particles
                   defined by 
WHAT(4)
, (5), and (6)
             = 0 : ignored

     
WHAT(2)
 > 0 : Upper threshold (GeV) for considering synchrotron radiation
                   photons as optical photons and transport them as such.
                   If defined, synchrotron radiation photons with energy
                   between 
WHAT(1)
 and 
WHAT(2)
 will be loaded on the optical
                   photon stack and then transported as such. Viceversa, those
                   with energy above 
WHAT(2)
 will be transported and interact
                   using EMF
             < 0 : reset to default
               
Default
 = 0.0

     
WHAT(3)
 > 0 : relativistic gamma factor (E/m) threshold for generating
                   synchrotron radiation photons. Only charged particles
                   with gamma larger than the threshold will emit sychrotron
                   radiation photons. It cannot be set lower than 3
             < 0 : reset to default
               
Default
 = 100.0

     
WHAT(4)
 = lower bound of the particle numbers (or corresponding name) for
               which synchrotron radiation is activated
               ("From particle 
WHAT(4)
...").
               
Default
 = 1.0

     
WHAT(5)
 = upper bound of the particle numbers (or corresponding name) for
               which synchrotron radiation is activated
               ("...to particle 
WHAT(5)
...").
               
Default
 = 
WHAT(4)
 if 
WHAT(4)
 > 0, 1.0 otherwise.

     
WHAT(6)
 = step length in assigning numbers. ("...in steps of 
WHAT(6)
").
               
Default
 = 1.0

     
SDUM
    = SYPRONLY: synchrotron radiation emission restricted to primary
                         particles only
               SYNCRALL: synchrotron radiation emission activated for all
                         generations
               
Default
 (
SDUM
 null) synchrotron radiation emission activated for
                         all generations

     
Default
 (option SYNCRAD not given): synchrotron radiation activated
               for all generations of electrons, positrons, and muons inside
               the regions flagged for synchrotron radiation emission (see
               ASSIGNMAT), with minimum photon energy set at 1 eV, no optical
               photons, and minimum gamma set at 100, for all particle
               generations

     
Notes:
         1) Setting of the maximum magnetic field intensity is compulsory
            for all regions where synchrotron radiation emission is activated
            (see the ASSIGNMAt option) if the magnetic field is not constant
            and uniform, or anyway provided by a magfld routine (see the
            MGNFIELD option). The maximum magnetic field does not need to be
            "exact" to the last digit, an approximate upper boundary is
            sufficient.
         2) Synchrotron radiation emission activation is automatically
            ignored for neutral particles included in those defined by
            
WHAT(4)
, (5), and (6), 
SDUM
 = SYPRONLY, SYNCRALL, or null.
         3) The maximum magnetic field intensity is automatically ignored
            for regions not flagged for synchrotron radiation production
            with the ASSIGNMAt card, even if defined by 
WHAT(4)
, (5), and (6),
            
SDUM
 = BMAX-REG.
         4) The emission threshold can be set as low as 1 eV (indeed by default
            it is set to 1 eV) even if FLUKA cannot deal with photons below
            100 eV and no optical photon properties are set by the user. In
            this way most of the emitted power is anyway generated, transported
            through vacuum and then dumped in the first material region
            encountered. Therefore the emitting particle energy loss and
            the power loading on eg a vacuum chamber can still be accurately
            described.

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