[fluka-discuss]: Fluka2021.2.3, respin of fluka20212.2, released

From: <alfredo.ferrari_at_mi.infn.it>
Date: Thu, 9 Dec 2021 11:24:11 +0100

Dear FLUKA users

Fluka-2021.2.3, a respin of Fluka-2021.2, is now available on the
Fluka web site (www.fluka.org).

This respin implements two features:

- implementation of a workaround when using (dose) conversion coefficients
  with pointwise cross sections. Those coefficients already include the
  local energy deposition of charged products, which are now explicitly
  generated, hence there is potential for double counting. The effect is
  minimal in most setup/conversion coefficient combinations, however now
  by default charged particle explicitly produced by low energy neutrons
  when using pointwise cross sections are ignored when applying the
  conversion coefficients. This behaviour can be controlled through the
  use of a special flag in the AUXSCORE command (see the ASCII manual
  for details). Please note that on the flip side, the use of fully
  correlated pointwise cross sections for low energy neutrons allows
  to use FLUKA to compute such coefficients, since all charged products,
  including recoils are explicitly generated and possibly transported;

- implementation of a DPA-NRT generalized particle scoring. The standard
  Fluka DPA scoring, DPA-SCO, like many other advanced treatments makes
  use of an efficiency function Xsi like in other "arc" (athermal
  recombination corrected) DPA calculations. While this is perfectly sound
  and it should give realistic results, comparisons with other codes are
  somewhat problematic, a) because they may use different formulations
  for Xsi, b) because often they use the so-called NRT
  (Norgett-Robinson-Torrens) approach where more or less Xsi=1. In order
  to facilitate comparisons with code/results obtained with the NRT
  approach, now FLUKA implements also the simplified DPA-NRT estimator.
  The developers are also exploring the possibility of offering on
  options various Xsi functions besides the presently implemented one.

This respin addresses a few issues, among them:

- a further few rare crashes in rQMD when run at energies above 10 GeV/n
  (see the previous announcement about why the threshold for rQMD has
  been raised);

- an issue in BME;

- a very rare issue in Peanut;

- an issue with hadron and muon multiple scattering when (relatively)
  thin targets are used without setting a corresponding STEPSIZE. Under
  some circumstances slightly incorrect angular distributions could
  have been produced;

- a possible issue when applying conversion coefficients with groupwise
  neutron cross sections. This issue is still under investigation,
  however in the new respin this part has been recoded and it is surely

- a very rare issue in the routine generating fluorescence X-rays;

All users are urged to update to the latest respin.

     The FLUKA developers

The following files are available, *PLEASE NOTE fluka2021.2-data.tar.gz


    fluka-2021.2-3.x86_64.rpm (Linux, gfortran-11.2, 64 bit)
    fluka-2021.2-3.i686.rpm (Linux, g77, 32 and 64 bit)

  Tar files:

    fluka2021.2-data.tar.gz (Data, required by all other
                                                tar files)
    fluka2021.2-linux-gfor64bitAA.tar.gz (Linux, gfortran-11.2, 64 bit)
    fluka2021.2-linux-gfor64bit-10.3-AA.tar.gz (Linux, gfortran-10.3, 64 bit)
    fluka2021.2-linux-gfor64bit-9.3-AA.tar.gz (Linux, gfortran-9.4, 64 bit)
    fluka2021.2-linux-gfor64bit-8.4-AA.tar.gz (Linux, gfortran-8.5, 64 bit)
    fluka2021.2-linuxAA.tar.gz (Linux, g77, 32 and 64 bit)
    fluka2021.2-mac-gfor64bit-10.2-AA.tar.gz (Mac , gfortran-10.2, 64 bit)
    fluka2021.2-mac-gfor64bit-9.3-AA.tar.gz (Mac , gfortran-9.3, 64 bit)
    fluka2021.2-mac-gfor64bit-8.4-AA.tar.gz (Mac , gfortran-8.4, 64 bit)
                                               (Linux, gfortran-9.4,
                                                glibc-2.17, 64 bit)

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Received on Thu Dec 09 2021 - 13:43:27 CET

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