The OPAL Discussion Forum

["Kim, Seongyeol" <seongyeol.kim AT anl.gov>]

Dear Andreas,

My apologies for late response to your answer. Thank you for letting me know about the transverse deflecting cavity.

I guess my question was not clear. Concerning "3DDynamic" type of field in the OPAL simulation, I noticed that only the real part can be used.

I am wondering if there is a way to use the imaginary part of the field in the OPAL simulation. If there is, could you please let me know?

Thank you very much!

Best regards,

Seongyeol

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From: Adelmann Andreas (PSI) <andreas.adelmann AT psi.ch>
Sent: Wednesday, January 12, 2022 3:52 PM
To: Kim, Seongyeol <seongyeol.kim AT anl.gov>
Cc: opal AT lists.psi.ch <opal AT lists.psi.ch>
Subject: Re: [Opal] Question regarding traveling wave RF transverse deflecting cavity

 

Hoi Seongyeol unfortunately I do not really understand what you mean. 

We currently do not have a “regression test” (as far as I know) of a transverse deflecting cavity. 

Cheers A

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On 10 Jan 2022, at 19:23, Kim, Seongyeol <seongyeol.kim AT anl.gov> wrote:

Dear all,

One more thing: Here, we tried to implement the traveling wave structure with separate components with 3Ddynamic type.

For the real part, we set the field to be [Re(E), Im(H)] and imaginary part to be [Im(E), Re(H)] using standing wave RFCavity element.

And, for the TDC (traveling wave cavity) element, we superimposed real and imaginary parts by setting the element like below: 

================================================================

TDC_Re:   RFCavity, L = Ltdc, VOLT = 1, ORIGIN = {0.0, 0.0, 0.05},
       ORIENTATION = {0.0, 0.0, 0.0}, TYPE = "STANDING", 
       FMAPFN = "DeflectorRe.T7", FREQ = 11700.0, LAG = tdcPhase;

TDC_Im:   RFCavity, L = Ltdc, VOLT = 1, ORIGIN = {0.0, 0.0, 0.05},
       ORIENTATION = {0.0, 0.0, 0.0}, TYPE = "STANDING", 
       FMAPFN = "DeflectorIm.T7", FREQ = 11700.0, LAG = tdcPhase-Pi/2; // +pi/2 or -pi/2 according to fieldmap data

TDC: Line = (TDC_Re, TDC_Im);

=================================================================

In addition to the setting we tried, I would like to get more confidence through the benchmarking data of traveling wave TDC example you provide.

I am looking forward to your message!

Best regards,

Seongyeol

---

보낸 사람: Kim, Seongyeol
보낸 날짜: 2022년 1월 10일 월요일 오후 12:08
받는 사람: opal AT lists.psi.ch <opal AT lists.psi.ch>
제목: Question regarding traveling wave RF transverse deflecting cavity

 

Dear all,

Hello, this is Seongyeol Kim, a postdoc with Argonne Wakefield Accelerator Facility in Argonne National Laboratory.

Currently, I am trying to perform formatting and implementing the traveling wave transverse deflecting cavity to the OPAL simulation.

I found that 3Ddynamic fieldtype for the OPAL simulation only includes real part of the fieldmap,

I think adding the imaginary part for implementing traveling wave structure is necessary, but I am not sure how to add it.

I was wondering if you could provide an example of the traveling wave transverse deflecting cavity. For me it will be a nice example and benchmarking data for our TDC in the OPAL simulation.

I am looking forward to hearing from you!

Best regards,

Seongyeol