Elegant users forum

Chao, Your understanding of the basic process is correct. The filter coefficients are dimensionless. For the voltage feedback, the voltage error is multiplied by 2(1+beta)/Ra to convert it to a current error. There is no separate gain control. The filter coefficients determine the gain. The manual p...

Pradeep, To understand the expression, you should first realize that before the expression is executed, the beam arrival time (Ct) is pushed onto the stack. In the example, T0=3.68e-6 is the revolution time, so "3.68e-6 /" results in the turn number (Ct/T0) being on the top of the stack. We then div...

Perhaps the attached example will help.

--Michael

Sara, I identified several issues The bunch interval (duplicate_stagger in makeBeam.ele) is wrong for your 500 MHz rf system. It should be a multiple of 1/MainRfFrequency. The Q of your harmonic cavity is very high. Even for SC cavities, we need to load the cavity to prevent very high beam-induced v...

These improvements are incorporated into the latest release, version 2022.2.

--Michael

Version 2022.2 of elegant has been released. This includes bug fixes and feature enhancements, as described in the updated manual.

--Michael

Version 2022.2 of elegant has been released. This includes bug fixes and feature enhancements, as described in the updated manual.

--Michael

Thanks for posting this. It's good to have more editor options.

--Michael

Chao, I'm glad to hear that you are now getting the same results as elegant after finding a problem. I'll look into the KAverage issue. To vary the charge per bunch in elegant, at present you have to vary the number of particles per bunch. The reason is that elegant assigns the same charge to each m...

I think this is a perfectly legitimate approach and will see how it can be implemented in the code in a flexible fashion. A very easy way is just to provide START_PID and END_PID parameters for the short-range wake elements. There is an alternative, use of pseudo-multi-bunch mode, but that assumes t...