= Release note for version 1.0.6 =


== do_dump == 

The processus for '''do_dump = 1''' has been recoded.
at each time step a dump of the beam is achieved: 

if '''dump_step = n''' and '''dump_particle = p''' the beams are dumped, every n-th step (one step consists of the advance of one inter-slice distance, along the z axis); in each slice : one particle every p : files named b1.1, b2.1,b1.2, b2.2,b1.3, b2.3 etc. The photons are dumped in the files named bp1.1, bp2.1,bp1.2, bp2.2,bp1.3, bp2.3 etc. in the same proportion : one dump every n-th step ; in each slice : one photon every p.

The format of the dumped files is the same as [wiki:BeamFormat beam.dat] and [wiki:PhotonFormat photon.dat].

== initial polarization ==

In the previous version, the initial polarization vector (in case of : '''bmt_precession=1''') is : px=0, py=0, pz=1 for all particles. New data have been introduced : 

{{{
polar_x= ?
polar_y= ?
polar_z =?
}}}

to be given by the user in the file acc.dat (in $ACCELERATOR:: data).

In case of '''bmt_precession=0''' ($PARAMETER) the presence or absence of polar_x, polar_y, polar_z does not have any consequence. 

When '''bmt_precession=1''' an initial polarization vector is generated for each particle : (polar_x, polar_y, polar_z), which does not need to be normed, if it represents a mixed state. 

The default value for (polar_x, polar_y, polar_z) is (0,0,1)

with '''load_beam=1''' the polarization can be read on the files ''electron.ini'' and ''positron.ini'' as three last values on each line (i.e. with the same format as in [wiki:BeamFormat beam.dat files] (this makes sense uniquely if '''bmt_precession=1'''). 
No initial polarization vector is taken into account.

== modification of criterium for automatic grid sizing ==

('''automatic_grid_sizing=1''')

'''n_x''' and '''n_y''' will be generated in order to be close to : 8*cut_x(y)/sigma_x(y) [instead of 4*cut_x(y)/sigma_x(y)] (for a better statistics for the file [wiki:LumieeFormat lumi.ee.out])