Search found 30 matches

by Teresia
21 Dec 2021, 15:02
Forum: Ring Tracking
Topic: Beam ion interaction using IONEFFECTS element
Replies: 16
Views: 5677

Re: Beam ion interaction using IONEFFECTS element

Hi, I have discovered the same problem for fill patterns with several gaps and I wonder if there might be a bug related to the particleIDs? Previously I created the input beam externally where I just continously increased the particleIDs, but lately I have changed this to skip over particleIDs for e...
by Teresia
18 Nov 2021, 11:29
Forum: Ring Tracking
Topic: Get turn-by-turn data without watch point for each bunch
Replies: 1
Views: 2222

Get turn-by-turn data without watch point for each bunch

Hi, I'm wondering if there is a way to get turn-by-turn data for each bunch without having to create one watch point for each bunch? Our machine has 934 bunches which means we need to create 934 watch points with 934 output files to get the output data we want to be able to analyse coupled-bunch ins...
by Teresia
24 Sep 2021, 08:41
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, In my experience when using the ion_effects your results will be very different depending on the number of interaction points you use. You need to define a sufficent number to give you a good approximation of the lattice. I have used the analytic trapping condition to see how the trapping is exp...
by Teresia
15 Sep 2021, 10:32
Forum: Ring Tracking
Topic: RF feedback for non-uniform fill patterns
Replies: 2
Views: 800

Re: RF feedback for non-uniform fill patterns

Thank you, Michael. Using an update interval of 1 so far works much better for the cases where I have a large transient beam loading. I also tried 934, but that seems to update too slow for the beam to not drift out of the binned area. For the cases where I have a small transient beam loading or eve...
by Teresia
01 Sep 2021, 05:48
Forum: Ring Tracking
Topic: RF feedback for non-uniform fill patterns
Replies: 2
Views: 800

RF feedback for non-uniform fill patterns

Hi, I am trying to simulate transient beam loading with main cavity + harmonic cavity, but I have some trouble with finding good settings for the update_interval of the RF feedback when running with non-uniform fill patterns. According to the manual the update_interval should preferably be set as mN...
by Teresia
22 Jul 2021, 08:07
Forum: Ring Tracking
Topic: Orbit correction with impedance
Replies: 4
Views: 1130

Re: Orbit correction with impedance

Hi, Okay, thank you. That makes sense. We have a similar process, but we attempted to include the multipole errors and orbit correction also in step 4 which cased the error. The reason for that is because we between step 2 and step 3 move between running Elegant on a local machine to running Pelegan...
by Teresia
21 Jul 2021, 13:18
Forum: Ring Tracking
Topic: Orbit correction with impedance
Replies: 4
Views: 1130

Re: Orbit correction with impedance

Hi Michael, Thank you for looking into it. Interestingly we have now discovered that the orbit correction works if we put start_on_pass = 1 on the impedance so we exclude the impedance for the first turn. It also works if we exclude the RF cavity from the lattice. We want to include both alignment e...
by Teresia
15 Jul 2021, 11:44
Forum: Ring Tracking
Topic: Orbit correction with impedance
Replies: 4
Views: 1130

Orbit correction with impedance

Hi, We are trying to simulate the effect of wakefields including errors in the lattice, but we don't get the orbit correction to work when having a transverse impedance in the lattice. The code doesn't give an error, but just stops the execution and returns MPI errors. Is it not possible to do orbit...
by Teresia
02 Jun 2021, 10:50
Forum: Ring Tracking
Topic: Preloading when using n_cavities on RFMODE
Replies: 1
Views: 7535

Preloading when using n_cavities on RFMODE

Hi, I'm wondering why the n_cavities parameter in RFMODE isn't taken into account when preloading the cavity? I have 8 main cavities, but when looking at the parameters for the preloading they only correspond to a single cavity? If I understand the source code correctly that is the case and n_caviti...
by Teresia
21 May 2021, 07:06
Forum: Ring Tracking
Topic: ZLONGIT reads in impedance file wrong
Replies: 2
Views: 5960

Re: ZLONGIT reads in impedance file wrong

Ah! Thank you. I wasn't aware of this. I will try that.

Best regards,

Teresia