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Re: [Opal] Some questions regarding OPAL

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  • From: Adelmann Andreas <andreas.adelmann AT>
  • To: John Power <JP AT>
  • Cc: "opal AT" <opal AT>
  • Subject: Re: [Opal] Some questions regarding OPAL
  • Date: Thu, 12 Oct 2023 07:11:48 +0000
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Good Point John, will prepare some parts of SwissFEL.

Cheers A
Dr. sc. math. Andreas (Andy) Adelmann
Paul Scherrer Institut OHSA/D17 CH-5232 Villigen PSI
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On 11 Oct 2023, at 22:14, Power, John <JP AT> wrote:

Hi Andreas,
4. If you have any other examples related to LINAC modules besides the  AWA RF photo injector, we would appreciate if you could share them.
There are more coming up in the next few weeks, but what is missing for your case?
If I could chime in with my 2 cents, it might be nice to have an example of a LINAC using traveling wave-accelerating cavities.  AWA cavities are all standing wave.
Cheers, John

-----Original Message-----
From: opal-request AT <opal-request AT> On Behalf Of Adelmann Andreas
Sent: Wednesday, October 11, 2023 1:16 PM
To: Galo Gallardo <ggallardo AT>
Cc: opal AT
Subject: Re: [Opal] Some questions regarding OPAL

Dear OPAL members,

As you already know, we would like to use OPAL-t in order to simulate deuteron bunches in the different modules of the IFMIF-DONES linac. For our problem, we basically need to get final particle distribution at the end of the lattice and the energy of the bunch.

So far, I have gone through the user's guide, the AWA RFPhotoInjector example and PyOPALTools notebooks. However, I still have a few questions (and pretty sure more will come along the way):

1. Regarding the particles distribution at the end, is it just provided in the RFphotoinjector.h5 that was generated after the simulation? I was checking it with pyOPALTools (the x and y variables).

Yes normally we store the last time-step per default.  

2. Regarding the .T7 files, are these mandatory?  Poisson Superfish is required too?  Is there any guide related to the generation of such files beyond whats in the user's guide?

In case you have RF structures T7 files are one way of getting the fields into OPAL. Please consult the Superfish manual on how to create these files.

3. After running the simulation, a folder called /data/ is also created, with some files in it. What are these files used for? I have not seen examples of them in the pyOPALTools notebooks.

No the pyOPALTools usually only take .stat and .h5 files. Please view the stuff in the data directory as advanced I am sure you do not need to consider them now.

4. If you have any other examples related to LINAC modules besides the  AWA RF photo injector, we would appreciate if you could share them.

There are more coming up in the next few weeks, but what is missing for your case?

5. Do you know anyone within IFMIF-DONES that has knowledge in OPAL-t? Besides Iván Podadera, he only used OPAL-cycl.

No unfortunately not.

Cheers A

That would be all for now. Thanks for your attention!

Best regards,

Galo Gallardo

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