CEA Codes forum

Dear Didier, please find attached files with FIELD MAP implementation. My question: does the 4th parameter of FIELD_MAP (R - aperture) have influence on the calculated results? In the 1st archive, R was set to 9 in accordance with field files whereas it was set to 20 in the 2nd archive. As it is see...

Dear Didier, I have same question about emittance growth. In my case there are no any accelerating elements as well as radiation in the line (just Quads and two bends). Yes, I took into account beam charge volume density, but I cannot understand why did 6D emittance significantly (I mean that it is ...

Dear Didier, unfortunately ke =1 did not help. Error message is still the same. What else can it be?

Dear Didier, one more problem with 3D RF field introduction into project.
Please, check my project (see attachment ) and answer me what is wrong and why program return next messages: ?
Regards, Vyacheslav.

Dear Didier,
when preparing project files to send you, I merged a number of consequent drift elements in one and rerun calculation. Obtained results below and looks more correct. Some strange effect took place. and Regards, Vyacheslav.

Dear Didier, after transfer line (no acceleration, no radiation and so on) calculation for one kind of particles with charge state Z I run calcalation for the same particle with the same parameters, but slightly different by beta (at the level about 1.5*10^{-3}) and charge state Z-1. Output particle...

Dear Didier,

thus, to use previously obtained results, it still needed to run calculation in the envelope mode.

Is it right?

Dear Didier, why does Linac Energy differ from Beam one? energy.jpg What does Linac Energy mean? Is it energy of the synchronous particle? Is the beam energy is the mean value on the all particle energies? How can I change synchronous particle phase? Just using SET_SYNC_PHASE before FIELD_MAP and pu...

kz=2*pi/beta*lambda - longitudinal propagation factor (wave number)

Am I right that Ez(x,y,z,t)=Ez(x,y,z)*cos(omega*t-kz*z), where Ez is the field map data value is a correct expression for the right-side of z-motion equation?