Search found 7 matches

by weijie
22 Oct 2023, 23:33
Forum: Ring Tracking
Topic: Ring tracking with ciwggler element
Replies: 6
Views: 971

Re: Ring tracking with ciwggler element

Dear Michael

The results between AT and elegant are consistent for the ring without a damping wiggler. But when it comes to damping wigglers, elegant will show different results compared with AT. I don't know if there is any error in the damping wiggler design.
by weijie
27 Sep 2023, 00:23
Forum: Ring Tracking
Topic: Ring tracking with ciwggler element
Replies: 6
Views: 971

Re: Ring tracking with ciwggler element

However, we have tried to decrease the number of the damping wigglers to 6 super peroid, but the paricle leak quickly also. Maybe the energy spread is still too large. In our second design, we incorporated distributed RF cavities and the dynamic apearture is still zero. Besides, we have also double...
by weijie
25 Sep 2023, 22:10
Forum: Ring Tracking
Topic: Ring tracking with ciwggler element
Replies: 6
Views: 971

Re: Ring tracking with ciwggler element

Dear Micheal Sorry for my late apply and thank you for your kind assistance! We have realized that a single RF cavity is insufficient in compensating for the energy loss. However, we have tried to decrease the number of the damping wigglers to 6 super peroid, but the paricle leak quickly also. Maybe...
by weijie
25 Sep 2023, 22:05
Forum: Optimization and Matching
Topic: error message in optimization
Replies: 0
Views: 1089

error message in optimization

Hello Micheal, I am doing the DA optimization by changing the ksext values, but I got an error saying Error: Unable to set parameter values--index out of range (SDDS_SetParameters) Problem setting SDDS parameter values (do_aperture_search). The error makes me confused. Is there any problem in the op...
by weijie
31 Aug 2023, 04:09
Forum: Ring Tracking
Topic: Ring tracking with ciwggler element
Replies: 6
Views: 971

Ring tracking with ciwggler element

Hi Michael,
We are doing damping ring tracking with the ciwggler element. But we have found that the bunched beam will get lost at the first pass and the paticle can not suvive. can you help us.
Best Regards
Weijie Fan
by weijie
06 Jun 2020, 01:40
Forum: Linac Tracking
Topic: CSR simulations with CSRCSBEND
Replies: 2
Views: 8104

Re: CSR simulations with CSRCSBEND

Thanks for the help of the last error. But there was another problem. I wrote a 'beam.sdds' and send it to the sdds_beam, but the output seems totally wrong. The emittance grew rapidly which was not realistic. The beam file and latttice file is in the attachment. I wish you can give me some advise.
by weijie
24 May 2020, 21:52
Forum: Linac Tracking
Topic: CSR simulations with CSRCSBEND
Replies: 2
Views: 8104

CSR simulations with CSRCSBEND

Dear Micheal or someone interested: Since there don't have a CSR option in the FEL radiator,I am using CSRSCBEND to simulate the CSR effect in a FEL radiator.But when I am tracking,there is warning saying that particle acquired undefined slopes when integrating through kick multipole.I don't know ho...