NUBEAM updates
==============

March 2010:    Contribution of nubeam_driver
               by Michael Kraus & Giovanni Tardini, IPP
  nubeam_driver is a time dependent driver, allowing for a variation
  of the background plasma profiles and signals from a NUBEAM call to the next.

December 2009: Implementation of ADAS cross sections into NUBEAM
               by Michael Kraus, IPP
  This allows a more accurate treatment of deposition in with high energy
  beams in high density target plasmas where collisional excitation
  effects play a large role.

November 2008: NUBEAM has been converted to use the Plasma State 
  Server code is now "nubeam_comp_exec" (was nubeam_driver) 
  the general outline of method of use is unchanged.

dmc  1 Oct 2003: a new test program, "nubeam_driver", has been added to
  the NUBEAM NTCC distribution.  This program, unlike "nubeam_test", gives
  an example of an independent installation of NUBEAM into a driver 
  program, without depending on data from a successful installation in
  another code.  The "nubeam_test" program is still provided, because it
  allows a quick, standalone method to reproduce crashed NUBEAM timesteps,
  should these occur.

  The NUBEAM "User Guide" documentation has also been rewritten and made
  more web-friendly.  The content refers to "nubeam_driver" instead of
  TRANSP for coding examples.

  These changes are as requested by the NTCC community.

  Note: this upgrade includes a change to the interface-- a status
  code argument "IERR" has been added to NUBEAM calls DEPALL, ORBALL,
  and NBFINISH.  This is to support eventual removal of all possible
  internal stops in NUBEAM, as has also been requested (some of the
  internal stops have been removed already).  Please note -- this
  requires a change in user code!  For details refer to the updated
  documentation.

dmc 11 Jun 2003: all Monte Carlo output sums have been upgraded to
  REAL*8 precision.  We found that for runs with nptcls ~ 30000, the
  accuracy of sums was damaged by roundoff error, because of evaluations
  of many instances of 

     w = w + dw

  and dw ~ w/10**7.

dmc  9 May 2003: Monte Carlo sums requested by Wayne Houlberg have been
  added, for eventual incorporation of fast ion terms in the NCLASS/
  FORCEBAL calculations.  See nbspec.dat:  the input block "sys" has
  added an integer control "nclass"-- set to 1 to get all of these
  sums.  There is a new output block, "nclass" (output compound data
  type nbotype_nclass) to contain the XPLASMA ids for these profile
  sums.