Elegant users forum

I've never seen this particular problem, but I'd guess the issue is that all the nodes need access to the input files, because the master and slaves all ready the input files independently.

--Michael

Frank, Yes, that's right. Also, floor coordinates are updated, but not written out, during optimization. It would be a good thing to remove this limitation. I'll add it to my list. Meanwhile, you can use alter_elements and a script to get the same result. Please see the attached file for an example....

Ilkyoung, In answer to your questions: 1. For dynamic apertures, the transverse momenta (px and py) are always 0. This is the standard assumption of dynamic aperture determination. In reality it is a simplification because the injected beam has a spread in transverse momenta. 2. If you use a specifi...

Ilkyoung, Elegant doesn't classify particles as "unstable." It only knows whether they are lost or not. In the context of ring simulations, a particle can be lost in several ways. First, it may exceed an aperture, as defined by ECOL, RCOL, MAXAMP, or SCRAPER elements, or using the aperture_data comm...

James,

Can you tell me what you are trying to accomplish with the simulation? Is it to model the CSR from a misaligned quadrupole?

--Michael

Phillipe,

Thanks for posting this. You can make it even faster by using only one sddsprocess invocation, as follows:

exec sddsprocess $input $output -filter=column,x,$W1L,$W1U,! \
-filter=column,x,$W2L,$W2U,! \
-filter=column,x,$W3L,$W3U,! \
...

--Michael

Ray, Sorry, I didn't understand your initial question. Let me try again. The orbit correction loop in elegant is as follows: while (n_xy_passes not exhausted) { iterate x orbit n_iterations times iterate y orbit n_iterations times if desired accuracy achieved, then break out of loop } In your run, n...

Philippe,

I can't think of a way to do this other than using the SCRIPT element. It would be a good thing to have so I'll add it to the list of needed features.

--Michael

Ray, I think the only problem is that your corrector and monitor arrangement is not ideal. If I remove the line that restricts the number of singular values, the condition number in the horizontal plane is very large. This indicates that the response of one or more correctors is very similar. You sh...

Shancai, I can confirm that there is a problem with your simulation for recent versions of elegant. The reason is that you are using CSBEND elements with the default integration parameters. These defaults are not good for most cases (this changes in the next release). Try setting N_KICKS=12,INTEGRAT...