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Re: [Opal] Field Output Command

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  • From: Chris Rogers < AT>
  • To: opal AT
  • Subject: Re: [Opal] Field Output Command
  • Date: Fri, 4 Mar 2022 16:29:19 +0000
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DumpEMFields works only with the RINGDEFINITION option of Opal-Cycl (which is really targeted at FFA design). Apologies if that is not what you are looking for.


On 04/03/2022 07:32, Zhang Hui (PSI) wrote:
Dear Guoliang

Both png files look not so promising. Anyway, I am not so familiar with this
kind of output. I normally use the program VisIt to look at the E- and
B-fields in h5part format visually. Of course, the decisive prove should be
the tracking through the map itself. For instance, it should give the right
energy gain, or the right deflection to the beam, or some other criteria.

The link to the program VisIt:
VisIt Home

Best wishes,


Paul Scherrer Institut
Dr. Hui Zhang
Forschungsstrasse 111
5232 Villigen PSI

Telefon: +41 56 310 53 98
E-Mail: hui.zhang AT
From: opal-request AT <opal-request AT> On Behalf Of
Sent: Freitag, 4. März 2022 04:47
To: opal <opal AT>
Subject: [Opal] Field Output Command


After I imported the 3D electric field simulation, I wanted to check whether
the electric field read by OPAL and used for calculation was correct.

I noticed gnu.out and eb.out in the data folder, but the electric field in
eb.out was always 0. (attachment 1)

I also tried to modify INFO, TRACE and EBDUMP Option Command, but got no
output results. I also notice the DUMPEMFIELDS in the Field output command,
but the electric and magnetic fields in output file still are 0.(attachment 2)

Anyone has any suggestions?

Best wishes,



douguoliang AT<mailto:douguoliang AT>

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