Last version:
FLUKA 2021.2.1, July 26th 2021
(last respin )
flair-2.3-0b 30-Jul-2021

News:

-- Fluka Release
( 30.07.2021 )

FLUKA 2021.2.1 has been released.
Fluka Major Release 18.05.2021 FLUKA 2021.2.0 has been released.
Congratulations from INFN: ,
Dear Paola,
I wish to congratulate you and all the authors and collaborators for this new Fluka release, which looks at the future and confirms the support of INFN in the development and continuous improvement of this code.
best regards
Diego Bettoni
INFN Executive Committee


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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....+....8
 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.

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