Search found 8 matches
- 12 Apr 2024, 02:54
- Forum: Optimization and Matching
- Topic: RPN expression error
- Replies: 1
- Views: 5808
RPN expression error
Hi Michael: I am using optmizization to do matching in a transportation line. But at the &optimization_term section, the expression of the given function do not work well, saying: unknown token: M2.betax too few items on stack (divide). I am currently using the release posted at Sep 13 2023 04:37:07...
- 22 Oct 2023, 23:33
- Forum: Ring Tracking
- Topic: Ring tracking with ciwggler element
- Replies: 6
- Views: 5079
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.
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.
- 27 Sep 2023, 00:23
- Forum: Ring Tracking
- Topic: Ring tracking with ciwggler element
- Replies: 6
- Views: 5079
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...
- 25 Sep 2023, 22:10
- Forum: Ring Tracking
- Topic: Ring tracking with ciwggler element
- Replies: 6
- Views: 5079
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...
- 25 Sep 2023, 22:05
- Forum: Optimization and Matching
- Topic: error message in optimization
- Replies: 0
- Views: 8250
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...
- 31 Aug 2023, 04:09
- Forum: Ring Tracking
- Topic: Ring tracking with ciwggler element
- Replies: 6
- Views: 5079
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
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
- 06 Jun 2020, 01:40
- Forum: Linac Tracking
- Topic: CSR simulations with CSRCSBEND
- Replies: 2
- Views: 9372
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.
- 24 May 2020, 21:52
- Forum: Linac Tracking
- Topic: CSR simulations with CSRCSBEND
- Replies: 2
- Views: 9372
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...