The OPAL Discussion Forum

["frederic.le.pimpec" <frederic.le.pimpec AT psi.ch>]

Hi Chuan,

I missed an email it seems.

I was effectively guessing that one was the macroparticle and the other 
the real particles.

Now it is clear ! No more confusion on my side

Actually H5root is very useful to see how the distribution evolves step 
by step, without to have to write a small program.
now the surface losses h5 files is not standard that h5root cannot open it.
So here again it is a weird way to look at what it is in.

Maybe the manual, in an annex, could list the parameters which are 
dumped in the various h5 files.
And give an example on how to load some of the parameters with matlab, 
Maple, Mathematica etc...

bests
Frederic

wangchuan02513 wrote:
> Hi, Frederic, The last column of the partstatistic.dat file is the
> number of the physical particles, and the particle number in .h5 file
> or the .out file is the number of macro particles in simulation. They
> have different meaning as I've mentioned in previous emails that, the
> number of the physical particles is equal to the sum of the charge of
> all macro particles in simulation divided by the charge of one
> particle of initial bunch. This charge weight is used to prevent
> memory exhaustion as both field emission and secondary emission may
> emit unlimited number of particles.
>
> So what you are interested in each time step should be the number of
> the physical particles but not the macro particle number. And you may
> not need to use either h5root or h5dump as a post processing tool for
> dark current simuation.
>
> I'm now coming back to work on those addtional output that you are
> interested in postprocessing as you mentioned in your last email.
>
> Best regards Chuan
>
>
>
>
>
> At 2011-10-19 22:50:16,"frederic.le.pimpec"
> <frederic.le.pimpec AT psi.ch> wrote:
> > Hi Chuan, Something is strange with the last column of the
> > partstatistic.dat file #Time/ns     tot_impac      tot_sey
> > TotalCharge      PartNum
> >
> > You write the PartNum is the number of particles at the end of the
> >  simulation. In my case I start with a few 1e4 and endup with 4e6
> > particles. When using H5root, it has a filed called Entries wich is
> > an integer. This field changes at every step looked at, but it
> > never shows the same number as the PartNum, the last step it shows
> > 79000 particles, not 4e6. So at the end what is the difference. How
> > many particles do I really have  at the end of my simulation ?
> >
> > I am trying to load in matlab the h5 file which is not standard,
> > hence I have no clue about what is in the .h5 file and writing:
> > h5disp('ctf3-injector-darkcurrent-1.h5') displays a very very long
> > list of stuff which is in ! is there any way to display only the
> > variables and their size ? and how many step numbers are in the
> > file.
> >
> > Please note that I did not re-run the simulation since you have
> > normally fixed the PartStatistic.dat header
> >
> > bests Frederic
> >
> > wangchuan02513 wrote:
> > > Hi, Frederic, The number of particles in *.oxxx file is the
> > > number of macro particles in simulation, however the last column
> > > in .dat file is the number of physical particles which you are
> > > interested in. And I'll fix the header problem as soon as
> > > possible, but it will not affect the result you get. Best regards
> > > Chuan

--
---------------------------
Dr Frederic Le Pimpec
Paul Scherrer Institut
WBBA 315
5232 Villigen
Switzerland
http://fel.web.psi.ch/
Tel : +41 56 310 5130
FAX : +41 56 310 4488