The OPAL Discussion Forum

[christof kraus <christof.j.kraus AT gmail.com>]

I have to contradict: Scaling of the field maps is somethings that will change in version 1.4. All field maps will normalize the field on axis. Before I changed that behavior I tried to convert a 2D field map into a 1D field map. It took me quite some time to figure out why Opal produced different results.

christof

On Tue, Nov 17, 2015 at 8:51 PM, Russell, Steve <srussell AT lanl.gov> wrote:

Hi Andreas,

I'll confirm the mag field behavior and reply back.

Steve

On Tue, 2015-11-17 at 07:02 +0000, Adelmann Andreas (PSI) wrote:
> Hello Nicole
>
>
> >
> > ​Hello OPAL experts,
> >
> > I've been using OPAL for the past few months and things are going
> > well. Thanks again for your help with my thermionic gun simulations
> > when I first started. I am currently running V1.2, but plan to
> > switch to V1.4 when it is released. I have a few questions about the
> > differences, ect.
>
>
> Yes 1.4 is a bit late :( but we are close :-)
>
> > 1. Does OPAL scale magnetic field maps to the max B value in the
> > file, or max Bz on axis? Pg. 183 of the manual says: "the input
> > field map will be normalized so the peak field magnitude value is
> > equal to ...1 T in the case of magnetic field maps."  I think I see
> > this behavior in my simulations, but appendix C (pg. 203) says
> > scaling is done using max Bz on axis values. Is this a feature that
> > is changed from V1.2 to V1.4?
>
>
> The behaviour is as described on P. 183 and the description on P 203
> is corrected in the new version of the manual.
>
>
> @Steve: can you check please
>
>
>
> >
> > 2. Should I use the R or E collimator? When we were emailing about
> > the thermionic gun, it was suggested that I use the R collimator.
> > The manual says E is supported in OPAL-T (pg.98). Is this difference
> > an artifact of using V1.2?
>
>
> In 1.4 you can use both, indeed there was a problem in 1.2.
>
>
> > 3. I have been running on a cluster at ANL, and I've been able to
> > run on multiple processors, but not on multiple nodes. I get
> > segmentation faults (11). Is this an artifact of using V1.2 that
> > will be fixed in V1.4, or is it something I am doing wrong?  The
> > cluster uses Torque PBS manager and Maui PBS scheduler, and my run
> > commands look like the following:
> > mpirun -np 16 opal OTR.in --info 0 | tee OTR.out
> >
> >
>
>
> That should work. Are you using the pre-build binaries for the closure
> runs?
> If you send me the input file I can have a look and check on our
> cluster.
> Also tell me where do you want to have the E-collimator so I can try.
> Do we have a Dropbox?
>
>
> Cheers Andreas

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