Elegant users forum

The change in the vertical emittance is shown in the figure below.

Dear all: When using IBSCATTER to simulate the IBS effect, there is a parameter called SMOOTH in IBSCATTER. I believe that setting SMOOTH to 1 or 0 may result in different paths for the variation of beam parameters, but the final equilibrium state should be relatively consistent. However, after comp...

Thank you for your detailed explanation. I understand the origin of the sqrt(4*PI) factor.

Hi, When using the IBSCATTER element for IBS simulation, under the condition of longitudinal slicing of the beam, how is the sliced bunch length statistically calculated? I checked the elegant source code and found that the sliced bunch length is given by “bLength = c_mks * tLength / sqrt(4 * PI)”. ...

When I use multi-bunch train beam fillings, the column Sy & Sx in the ebeam file are 1 for NULL bucket, so : I'm not sure why you are getting any NULL/zero values here. Can you post the exact command you are using for makeBunchTrainWF, and your fill file? Hi,Joe: I may not have articulated my probl...

Hi,Joe: Thank you for your explanation .I have another question about data processing, When I use multi-bunch train beam fillings, the column Sy & Sx in the ebeam file are 1 for NULL bucket, so : sddsprocess ion1.ebeam ion1.ebeam.break -redefine=col,ampy,"Cy abs Sy /" -redefine=col,ampx,"Cx abs Sx /...

Hello Saroj, This series of commands will plot the average ion density of the APS ring: sddsprocess ion1.ionDens -pipe=out -process=qIons,last,qLast | sddscollapse -pipe | sddsbreak -pipe=in ion1.ionDens.break -decreaseOf=s sddsprocess ion1.ionDens.break -process=qLast,sum,qTot -process=Pass,first,...

Hi Joe, Thank you. Then I guess I need to do some tests and see which positions I need to get convergence of the results. I also have another question now. I am trying to use the bigaussian fit and I haven't given any other values than the default. It seems to kind of work (I get histograms and fit...

Hi Joe, Thank you for your replies. I have not yet catch on the simulation of the ion_effect. I now see the example 'ionEffects1' is an old version, the ion_effect has been updated several versions. Could you upload an ion_effect example of the new version? I still have a few questions： 1.Do I have ...

Hi, Teresia: Thank you for your replies. I couldn't agree more with what you said: the trapping condition depends on beam size(beta function) that changed over the lattice, so the interaction points for simulation must be chosen carefully. But in my case, the beta function at the 10 and 1 interactio...