opal AT lists.psi.ch
Subject: The OPAL Discussion Forum
- From: "Zhang Hui (PSI)" <hui.zhang AT psi.ch>
- To: douguoliang <douguoliang AT impcas.ac.cn>, opal <opal AT lists.psi.ch>
- Subject: RE: [Opal] About 3D Electric Field
- Date: Wed, 23 Mar 2022 10:50:02 +0000
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ESCALE gives you the possibility to scale up or down the strength of the field map(s) imported for OPAL simulation. For example, if the map imported is calculated with a peak voltage 100 kV, and if the applied peak voltage is 80 kV, then you may scale down the map by setting ESCALE = 0.8.
Hopefully this answers your question.
Best regards, Hui
From: opal-request AT lists.psi.ch <opal-request AT lists.psi.ch>
On Behalf Of douguoliang
Hi , all
I'm using 3D electric fields to simulate the spiral sectors cyclotron. When using the field of type BANDRF , we need to set the parameter of ESCALE. I don't understand why need to set the parameter ESCALE, and I want to verify my idea. Here is my understanding.
In fact, the same electric field has different energy gain for particles due to different number of grid points. OPAL uses raw imported electric fields from users without interpolation. The ESCALE is the ratio of the actual high-frequency voltage to the voltage obtained by integrating the imported electric field.
I'm not sure if I understand this correctly. Hope everyone can give some advice.
[Opal] About 3D Electric Field,
- RE: [Opal] About 3D Electric Field, Zhang Hui (PSI), 03/23/2022
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