The OPAL Discussion Forum

[Nicole R Neveu <nneveu AT stanford.edu>]

Hi Philippe,

 

You have access to bebop right? Here is the location of my old wakefield files:

/lcrc/project/AWA-beam-dynamics/Nicole/drive/pbg

If you don’t have access, I can email you the files.

I will try to work w/ Achim to get an example in the manual.

 

I have used both the OPAL optimizer, and external optimizers.

My OPAL optimization files should be in the AWA github we made under TBA.

If not, find them here as well:

https://github.com/nneveu/awa-tba/tree/master/paper-run-ex4

 

Thanks,

 

Nicole

 

 

 

From: Philippe Piot <philippe.piot AT gmail.com>
Reply-To: "philippe.piot AT gmail.com" <philippe.piot AT gmail.com>
Date: Thursday, July 9, 2020 at 5:32 AM
To: Nicole R Neveu <nneveu AT stanford.edu>
Cc: opal <opal AT lists.psi.ch>
Subject: Re: [Opal] wakefield from Green's function in OPAL-t

 

Hi Nicole, 

  No, nobody replied to me but I saw Christof opened an issue and was playing with a Wakefield regression test so I suspect he is looking into this. I just wanted to implement the longitudinal and transverse wake, if you have a file handy I would be grateful if you could share it so can see if I am doing something wrong (I use the same adds format as elegant as mentioned in the user manual). 

  By the way, do you have an example of optimization setup for OPAL (I think you did many of the bunch length-emittance) but I cannot recall if you were using OPAL or the external optimizer you developed (I am interested in the internal OPAL optimizer)? 

  I hope all is well with you. All the best,  -- Philippe. 

 

On Thu, Jul 9, 2020 at 7:25 AM Nicole R Neveu <nneveu AT stanford.edu> wrote:

Hi Philip,

 

Did anyone get back to you on the wakefields?

I used them a while ago while at AWA, but  in version 1.9.

I can dig up those files….

 

I agree this needs some attention in the manual.

 

Thanks,

 

Nicole

 

From: <opal-request AT lists.psi.ch> on behalf of Philippe Piot <philippe.piot AT gmail.com>
Reply-To: "philippe.piot AT gmail.com" <philippe.piot AT gmail.com>
Date: Wednesday, June 24, 2020 at 6:30 AM
To: opal <opal AT lists.psi.ch>
Subject: [Opal] wakefield from Green's function in OPAL-t

 

Dear All,

  Could somebody share an example on the use of external sdds file to model the effet of wakefields in OPAL-t. I would like to account for both the longitudinal and transverse (dipole) wakefield -- I assume I have to use 2 WAKE elements with the  LONG-SHORT-RANGE, TRANSV-SHORT-RANGE or does the LONG-TRANSV-SHORT-RANGE enable the simultaneous modeling of both types of wake? Section 18 on wakefield does not have a lot of details. Thank you very much for your help. All the best, -- Philippe.