Elegant users forum

Hi again,

So I got the tracking_matrix running, but it gives completely unreasonable values for e.g. T166 and U1666, they are several orders of magnitude too large.

//Jonas

Hi, Oh, all right, it's user error on the tracking_matrix, I thought it was an on-off thing (i.e. just 1 and 0) and not the order that you were supposed to enter. I'll try that right away, but maybe it can be clarified a bit in the manual? I always run the default_order = 3, though. I'll give it ano...

Hi, I have been doing bunch compressor optimization of two bunch compressors, optimizing after T166, T266, T566, U1666 and U2666, to reduce slice centroid offset from higher-order dispersion after the compressor. In the first compressor, the tracked beam corresponded well with the analytical equatio...

Hi, So, a small update on our case. I talked to our RF guy yesterday and we had a look at some field plots. The electric field kick is a rather large fraction of the magnetic field kick in our cavities. These should have a different effect on the beam, as the electric field changes the overall momen...

Hi again! I e-mailed you some files yesterday which should show this behavior for both the RFDF and the dipole. There is no ISR enabled, so it can't be that either. The only way that I can reduce the effect from either element is to turn the respective "strength" down. We don't have a standing wave ...

Hi Michael, All right, I will stay with the RFDF then. I will talk to our RF guy who works on this and see if transverse independence is a reasonable assumption also for our design. I have the L-parameter to the geometric length of the two units. Is there any sort of general rule-of-thumb to use whe...

Hi! So, another addition to this thread. It seems that I had accidentally removed the EDGE1_ORDER = 2 option (and also for edge 2) from my dipoles, so that it just used the default value 1. I used the T- and U-terms (mainly T166 and U1666) to calculate higher order dispersion (aka horizontal offset ...

Hi, I'm trying to model a transverse deflecting cavity and I'm wondering which element you regard as being the most realistic? I'm currently using an RFDF element which is implemented along the same lines as in the example file, but I would like to be as precise as I can be with respect to fields an...

Hi! I'm trying to tune U1666 and U2666 of a compressor, and so I eventually put octupoles (KOCT) in the dispersive section. However, when I change the strength, I can see these values change, but U5666 remains fix with octupole strength and position, I have allowed for an oct strength of up to k3 = ...

Thank you! Everything runs fine again

//Jonas