Elegant users forum

Dear Michael, Thanks for your quick reply. What I am trying to simulate is the rf-noise and rf-feedbacks in the mode element. The purpose is to know if the feedback can follow the rf-noise and maintain the cavity voltage. In the simulation, the filling pattern is set as 3840=80*(1bunch+47gap), which...

Hi,

I would like to simulate the influence on beam from the generator current (Ig) noise, together with the rf-feedbacks.
Is there any example showing how to set the generator current noise in rf mode element?

yours Chao

Hi Michael, Recently, I am trying to ramp the beam current from a certain value to zero to check the cavity response. In the simulation, I set 80 bunches, given in train_80b_1KPerBunch_even.sdds and each bunch has 7.6nC charge initially In the output of ramp_element, ramp.sdds, the total charge is r...

Dear Michael, I understand your concerns. For a realistic study in electron rings, it has to be element-by-element tracking. The reason why I asked is because of the simulation of a linear one-turn map together with the space charge effect 1. perfect case for benchmark purposes. 2. perfect case to s...

Hi, This is Chao. Recently, I am trying to do some study on space-charge effect with elegant. My question is simple: Can the space-charge effect be simulated with ILMATRIX (one-turn map) by elegant? I tried this method, however, it seems like the results given out are not as I expected. Looking forw...

Dear Michael, There is one more thing I need your help of this TFDRIVER element. By reading the manual, I am confused about the setting of FIR filter with the arbitrary delay and UPDATE_INTERVAL value not equal 1. For simplicity, assume the input filter TFBPICKUP with settings as A0=1, UPDATE_INTERV...

Dear Michael, Recently, I am trying to learn Elegant simulation model for the bunch-by-bunch feedback with TFDRIVER element in transverse planes. I read the source code, and there is one thing I did not get it, hopefully, you can help me clarify it. Th codes are between line 427 and 444 in the tfeed...

Chao, The recirculation element is to allow setup steps to take place prior to multi-turn tracking in a ring. The original inspiration was to allow tracking through a transport line and injection elements, followed by multi-turn tracking. Although the feature is kept for backward compatibility, it ...

Chao, The problem is that your CHARGE element is downstream of a recirculation element (RC). So the beam only sees the CHARGE element on the first pass through the beamline. I don't think you need the recirculation element. --Michael Thanks Michael, Great thanks for your answers. I got it. For a fu...

Dear Michael， I am tying to make a test run which ramps the beam current in the first several hundreds turns. Somehow, not be able to do that. The attached files shows the script I prepared, could you please take a look and help me to fix it. PS: I found that the output of the &ramp_elements command...