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Re: [Opal] Field Output Command

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  • From: "Calvo Portela, Pedro" <Pedro.Calvo AT>
  • To: "opal AT" <opal AT>
  • Subject: Re: [Opal] Field Output Command
  • Date: Mon, 7 Mar 2022 07:35:07 +0000
  • Accept-language: es-ES, en-US

Dear Guoliang

In the output .stat file the electric and magnetic fields of the reference particle are recorded , which can be used to corroborate if the fields are correct. Also, I think that DumpFields and DumpEMFields should work correctly. If you can pass me your input file and the fields, I will try to take a look at it.



Dr. Pedro Calvo Portela
Unidad de Aceleradores - CIEMAT
Avenida Complutense 40, Edificio 7
28040 Madrid
Tel: +34 – 91 496 2554

De: opal-request AT <opal-request AT> en nombre de Chris Rogers < AT>
Enviado: viernes, 4 de marzo de 2022 17:29
Para: opal AT
Asunto: Re: [Opal] Field Output Command
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,
> Hui
> __________________________________________
> Paul Scherrer Institut
> Dr. Hui Zhang
> WBGA/C34
> Forschungsstrasse 111
> 5232 Villigen PSI
> Schweiz
> Telefon: +41 56 310 53 98
> E-Mail: hui.zhang AT
> From: opal-request AT <opal-request AT> On Behalf Of douguoliang
> Sent: Freitag, 4. März 2022 04:47
> To: opal <opal AT>
> Subject: [Opal] Field Output Command
> Hi,all
> 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,
> Dou
> []
> douguoliang
> douguoliang AT<mailto:douguoliang AT>

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