Ji-Gwang,
I can't duplicate the problem with version 2022.0. I've attached my files.
--Michael
Search found 1812 matches
- 08 Feb 2023, 10:55
- Forum: Bugs
- Topic: Orbit correction bug
- Replies: 5
- Views: 57
- 08 Feb 2023, 10:26
- Forum: Ring Tracking
- Topic: rf feedback in rfmode element
- Replies: 5
- Views: 155
Re: rf feedback in rfmode element
Chao, This is outside my expertise, but I understand that there are various methods to transform a digital filter into an analog equivalent and vice-versa. In our 2015 IPAC paper on rf feedback, my colleague Tim Berenc recommends using a bilinear transform. The reference is to M. Santina et al. W. S...
- 07 Feb 2023, 15:32
- Forum: Bugs
- Topic: Orbit correction bug
- Replies: 5
- Views: 57
Re: Orbit correction bug
Ji-Gwang,
Thanks for the lattice file. Can you also post the .ele file?
--Michael
Thanks for the lattice file. Can you also post the .ele file?
--Michael
- 07 Feb 2023, 15:29
- Forum: Optimization and Matching
- Topic: Optimizing the quadrupole strengths
- Replies: 13
- Views: 26546
Re: Optimizing the quadrupole strengths
The problem is that the tracking.ele file isn't constructed correctly to generate the .twi file. See the attachment for a file that should work. (Basically, requesting a twiss output file during an optimization isn't supported. It has to be done after the optimization in a second sequence.) --Michael
- 06 Feb 2023, 18:55
- Forum: Optimization and Matching
- Topic: Ask about focusing beam using six quadrupoles.
- Replies: 4
- Views: 116
- 06 Feb 2023, 18:47
- Forum: General
- Topic: Centroid Shift without any magnet alignment error
- Replies: 4
- Views: 135
Re: Centroid Shift without any magnet alignment error
The reason for this is that your beam line contains dipole magnets with small bending radii. There are sextupole-like terms present in such magnets due to the small radius of curvature of the coordinate system. This results in distortion of the phase space, which shows up as a small centroid error. ...
- 06 Feb 2023, 18:34
- Forum: Bugs
- Topic: Orbit correction bug
- Replies: 5
- Views: 57
Re: Orbit correction bug
Ji-Gwang,
There may have been some changes in orbit correction methods that affect your simulation. However, without the files I can't tell.
Please upload all the files necessary to reproduce the problem.
--Michael
There may have been some changes in orbit correction methods that affect your simulation. However, without the files I can't tell.
Please upload all the files necessary to reproduce the problem.
--Michael
- 06 Feb 2023, 18:33
- Forum: Ring Tracking
- Topic: Pelegant Error: Unable to read ascii file with SDDS_MPI
- Replies: 1
- Views: 36
Re: Pelegant Error: Unable to read ascii file with SDDS_MPI
Ji-Gwang,
The problem is that Pelegant can't read ASCII files using parallel I/O. Just convert the files to binary form:
--Michael
The problem is that Pelegant can't read ASCII files using parallel I/O. Just convert the files to binary form:
Code: Select all
sddsconvert -binary <filename>
- 06 Feb 2023, 18:31
- Forum: Optimization and Matching
- Topic: Optimizing the quadrupole strengths
- Replies: 13
- Views: 26546
Re: Optimizing the quadrupole strengths
The 40-cm depth is defined by the D2 element, which defines the drift space between the last quadrupole and the end of the beamline.
--Michael
--Michael
- 06 Feb 2023, 18:28
- Forum: Optimization and Matching
- Topic: geneticoptimizer example
- Replies: 2
- Views: 116
Re: geneticoptimizer example
Using the Java or Tcl/Tk SDDS editor is a good approach. One can also use "sddsconvert -ascii <filename>" and then edit the file with any text editor; its a good idea to use sddscheck to validate the file after editing by hand.
--Michael
--Michael