Search found 39 matches

by tiansk
09 Dec 2021, 21:25
Forum: Ring Tracking
Topic: Beam ion interaction using IONEFFECTS element
Replies: 16
Views: 5681

Re: Beam ion interaction using IONEFFECTS element

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...
by tiansk
06 Dec 2021, 02:18
Forum: Ring Tracking
Topic: Beam ion interaction using IONEFFECTS element
Replies: 16
Views: 5681

Re: Beam ion interaction using IONEFFECTS element

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 /...
by tiansk
19 Nov 2021, 01:13
Forum: Ring Tracking
Topic: Beam ion interaction using IONEFFECTS element
Replies: 16
Views: 5681

Re: Beam ion interaction using IONEFFECTS element

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,...
by tiansk
03 Nov 2021, 10:12
Forum: Ring Tracking
Topic: Placement of IONEFFECTS elements
Replies: 7
Views: 7408

Re: Placement of IONEFFECTS elements

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...
by tiansk
18 Oct 2021, 02:38
Forum: Ring Tracking
Topic: Coupled motion between ions & e-beam simulation using ion_effects
Replies: 5
Views: 1180

Re: Coupled motion between ions & e-beam simulation using ion_effects

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 ...
by tiansk
25 Sep 2021, 21:08
Forum: Ring Tracking
Topic: Coupled motion between ions & e-beam simulation using ion_effects
Replies: 5
Views: 1180

Re: Coupled motion between ions & e-beam simulation using ion_effects

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...
by tiansk
22 Sep 2021, 20:40
Forum: Ring Tracking
Topic: Coupled motion between ions & e-beam simulation using ion_effects
Replies: 5
Views: 1180

Coupled motion between ions & e-beam simulation using ion_effects

Hi I am using the elegantExamples(ionEffects1)to simulate the coupled motion between ions & e-beam. In the aps.lte file,there are two transfer models for fast tracking: RING_ILM10 and RING_ILM_NOSR, so there are 10 and 1 ion production points corresponding to the complete ring respectively.When I an...
by tiansk
02 Jul 2021, 02:48
Forum: Ring Tracking
Topic: Particle distribution generated with bunched_beam using use_moments_output_values
Replies: 4
Views: 935

Re: Particle distribution generated with bunched_beam using use_moments_output_values

Hi Michael, I think I've found the reason for the strange distribution of particles in the x direction. I want to generate three sigma cutoff Gaussian particle distribution, I should set the distribution_cutoff parameter, not the enforce_rms_values parameter. When I set distribution_cutoff[0] = 3*3,...
by tiansk
29 Jun 2021, 08:18
Forum: Ring Tracking
Topic: Particle distribution generated with bunched_beam using use_moments_output_values
Replies: 4
Views: 935

Particle distribution generated with bunched_beam using use_moments_output_values

Hi Michael, As shown in the attached example, I want to use the moments_output file to generate the particle distribution by set the parameter use_moments_output_values=1 in bunched_beam. I first checked the emittance of the generated particles by using sddsanalyzebeam command, the results is ex/ey=...
by tiansk
15 Oct 2020, 20:46
Forum: Bugs
Topic: moments_output command on Win system
Replies: 3
Views: 6495

Re: moments_output command on Win system

Okay ...
I will download the fixed Version

Thanks much,

Tiansk