CERN homepage INFN homepage
FLUKA: EXPTRANS Previous Index Next

EXPTRANS


    !!! NOT IMPLEMENTED YET !!!
    Requests an exponential transformation ("path stretching")


     
WHAT(1)
>= 0.0 :
WHAT(2)
to
WHAT(5)
are used to input a parameter defining the exponential transformation in various regions < 0.0 :
WHAT(2)
to
WHAT(5)
are used to define the particles to which the exponential transformation must be applied
Default
= 0.0 For
WHAT(1)
>= 0.0 :
WHAT(2)
= exponential transformation parameter ETA ( 0 =< |ETA| < 1 ) This value can be overridden in the user routine UBSSET (argument EXPTR in the calling list, see 13})
Default
= 0.0
WHAT(3)
= lower bound (or corresponding name) of the region indices with exponential transformation parameter ETA =
WHAT(2)
("From region
WHAT(3)
...")
Default
= 2.0.
WHAT(4)
= upper bound of (or corresponding name) the region indices with exponential transformation parameter equal to
WHAT(2)
("...to region
WHAT(4)
...")
Default
=
WHAT(3)
WHAT(5)
= step length in assigning indices. ("...in steps of
WHAT(5)
").
Default
= 1.0
WHAT(6)
,
SDUM
: not used For
WHAT(1)
< 0 :
WHAT(2)
= lower bound (or corresponding name) of the particle indices to which exponential transformation is to be applied ("From particle
WHAT(2)
...")
Default
= 1.0.
WHAT(3)
= upper bound (or corresponding name) of the particle indices to which exponential transformation is to be applied ("...to particle
WHAT(3)
...")
Default
: =
WHAT(2)
if
WHAT(2)
> 0.0, otherwise = 40.0 (low-energy neutrons)
WHAT(4)
= step length in assigning indices. ("...in steps of
WHAT(4)
").
Default
: 1.0
WHAT(5)
,
WHAT(6)
,
SDUM
: not used
Default
(option EXPTRANS not given): no exponential transformation Example (number based):
*...+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....
EXPTRANS 1. 0.8 10. 18. 8. 0. EXPTRANS -1. 7. 8. 0. 0. 0.
* Exponential transformation is requested for photons (particle no. 7)
* and neutrons (particle 8), in regions 10 and 18 with an ETA parameter
* equal to 0.8
The same example, name-based: EXPTRANS 1. 0.8 tenthReg eighteen 8. 0. EXPTRANS -1. PHOTON NEUTRON 0. 0. 0.

Previous Index Next