Search found 11 matches

by Gyeongsu
31 Mar 2021, 01:57
Forum: Ring Tracking
Topic: Wrong emittance ratio after tracking full coupling beam.
Replies: 7
Views: 6580

Re: Wrong emittance ratio after tracking full coupling beam.

Dear michael,

I am late to say thanks to you for your reply.
We are doing coupling study by using and referring attached files in your reply.
Thanks a lot.

Sincerely,
Gyeongsu Jang
by Gyeongsu
21 Jan 2021, 03:05
Forum: Ring Tracking
Topic: Wrong emittance ratio after tracking full coupling beam.
Replies: 7
Views: 6580

Re: Wrong emittance ratio after tracking full coupling beam.

Dear Michael, I appreciate your reply the previous question. However. the result that we get from your reply reveals that the both of horizontal and vertical emittances become 59 pm the natural emittance of our ring after sufficient turns. Round beam emittance in our lattice is 39 pm. We tried to re...
by Gyeongsu
14 Jan 2021, 03:12
Forum: Parallel Elegant
Topic: gpu-elegant doesn't work for dynamic aperture tracking
Replies: 1
Views: 7764

gpu-elegant doesn't work for dynamic aperture tracking

Hello, I tried to use gpu-elegant . As far as I know, there is no special command or additional coding to use gpu-elegant . Just replacing the " elegant " to " gpu-elegant " is okay. To check it, I tested the gpu-elegant with the elegant examples(which is on the aps elegant web site). First PAR/twis...
by Gyeongsu
29 Oct 2020, 21:36
Forum: Ring Tracking
Topic: Wrong emittance ratio after tracking full coupling beam.
Replies: 7
Views: 6580

Re: Wrong emittance ratio after tracking full coupling beam.

Dear michael,

I appreciate your reply.
I will refer to your comments and attached files.

Sincerely,
Gyeongsu Jang
by Gyeongsu
02 Aug 2020, 21:35
Forum: Ring Tracking
Topic: Wrong emittance ratio after tracking full coupling beam.
Replies: 7
Views: 6580

Re: Wrong emittance ratio after tracking full coupling beam.

Dear michael, I am attaching lte file with skew quadrupoles and ele file for running elegant. You can see S31ACORRECTOR , S32ACORRECTOR, and so on elements In lte file. In these elements, there are QS31A, QS32A, and so on elements. These elements are skew quadrupoles. There are macros such as <latti...
by Gyeongsu
31 Jul 2020, 02:57
Forum: Ring Tracking
Topic: Wrong emittance ratio after tracking full coupling beam.
Replies: 7
Views: 6580

Wrong emittance ratio after tracking full coupling beam.

Dear, everyone I put 12 skew quadrupoles at lte file and adjusted tunes such that beam lies in different resonance. I verified the full coupling happened from twi file as below. couplingIntegral 6.959754783793667e-03 couplingDelta 9.320972046111820e-05 emittanceRatio 9.998206684736263e-01 I tracked ...
by Gyeongsu
20 Jul 2020, 03:15
Forum: Parameter Scanning
Topic: The meaning of the input parameters on the command "perturbation"
Replies: 2
Views: 9259

Re: The meaning of the input parameters on the command "perturbation"

Thank you I will check it more by myself. I have one more question. If I want to check the applied multipole errors. Where can I see it? Specially I want to know the random multipole is well applied for each quadrupole or sextupole. In *.lte file, I insert the random multipole error for the quadrupo...
by Gyeongsu
13 Jul 2020, 03:08
Forum: Ring Tracking
Topic: Beam lost in a single turn. Why does it happens? Is it just a numerical error?
Replies: 2
Views: 6311

Re: Beam lost in a single turn. Why does it happens? Is it just a numerical error?

Thank you for your reply. I think the centroid motion with the lost particle's initial condition can't ensure the same tracking results. I revised some of your script and tried to check the single particle motion in all position s. In that case, the recorded data of the watch elements and centroid m...
by Gyeongsu
09 Jul 2020, 02:27
Forum: Parameter Scanning
Topic: The meaning of the input parameters on the command "perturbation"
Replies: 2
Views: 9259

The meaning of the input parameters on the command "perturbation"

The elegant code offers the function that can generate random multipole error coefficients with the input parameters I saw the example PAR/randomMultipoles There, by using the sddsrandmult code, the multipole coeffecients are calculated. However, I am confused the meaning of the input parameters suc...
by Gyeongsu
03 Jun 2020, 20:04
Forum: Ring Tracking
Topic: Beam lost in a single turn. Why does it happens? Is it just a numerical error?
Replies: 2
Views: 6311

Beam lost in a single turn. Why does it happens? Is it just a numerical error?

Many studies shows that the dynamic aperture with RF reduces the dynamic aperture area compared to the dynamic aperture without RF. I tried to find out why does it happens. I tracked the particles with elegant. First I put the watch element at some place and plot the x or y along the # of turn. I re...