Search found 8 matches

by Seb_Wilkes
28 Oct 2022, 04:04
Forum: General
Topic: ~10x Speed up for multi-bunch studies with short+long range impedance
Replies: 2
Views: 106

~10x Speed up for multi-bunch studies with short+long range impedance

Greetings fellow researchers, I wanted to share something I've done that may be of relevance. I'm up for critique, as it's quite a big claim. If it is worth it, then I wonder if Michael could consider adding in a toggleable feature that's officially built into the framework? First off, let me descri...
by Seb_Wilkes
08 Sep 2022, 05:29
Forum: General
Topic: Arbitary charge per bunch with arbitary macro-particles per bunch?
Replies: 3
Views: 1740

Re: Arbitary charge per bunch with arbitary macro-particles per bunch?

Hvaing dug into the source code, it strongly appears that the code is designde around the principle of the charge being fixed around the number of particles or bunches, but not either. I suspect this post is now a feature request. I can't personally think of a simple way of correctly allocating the ...
by Seb_Wilkes
30 Aug 2022, 07:30
Forum: General
Topic: Arbitary charge per bunch with arbitary macro-particles per bunch?
Replies: 3
Views: 1740

Arbitary charge per bunch with arbitary macro-particles per bunch?

Hi all, I'm scratching my head how to do this. Take for instance if we want to run hybrid mode. Right now, if we want to run a bunch with a greater charge, we have to run more particles (with CHARGE, PER_PARTICLE=1). Clearly we are concerned with the running of the single bunch with greater charge, ...
by Seb_Wilkes
05 Aug 2022, 09:54
Forum: General
Topic: Particles fly off to huge trajectories - any ideas?
Replies: 4
Views: 2666

Re: Particles fly off to huge trajectories - any ideas?

See attachments for movies and for elegant script.

The 'offending' frequencies were 143806 Hz (A) and 146006 Hz (B).
by Seb_Wilkes
05 Aug 2022, 09:49
Forum: General
Topic: Particles fly off to huge trajectories - any ideas?
Replies: 4
Views: 2666

Re: Particles fly off to huge trajectories - any ideas?

Hello everyone. Sorry Michael, I now understand that is the 'done' thing. Allow me to be more thorough. Since those simulations were performed, I have done a great deal more. That effect is still an ever present risk. In fact I created a simple 'cleaning' script that goes through my phase space and ...
by Seb_Wilkes
01 Aug 2022, 10:02
Forum: General
Topic: defining my own wiggler field
Replies: 6
Views: 1501

Re: defining my own wiggler field

Do wait on Michael to confirm or deny, but yes to my understanding the synchrotron fields must be calculated ourselves, however the effects on a travelling bunch (particles) is modelled by Elegant. I had been looking at this for myself and for a classical wiggler I think the solution is to take the ...
by Seb_Wilkes
29 Jul 2022, 12:53
Forum: General
Topic: TWPL increasing integration steps creates bizare behaviour
Replies: 1
Views: 1175

TWPL increasing integration steps creates bizare behaviour

Hello all, Has anyone else got much experience with setting the integration step number for TWPL? At first I went for adapbtable step sizes, but elegant threw a warning. After that I went to a fixed step size and it went away. However I wanted to know how many would be suitable. For one thing, beyon...
by Seb_Wilkes
08 Jun 2022, 05:13
Forum: General
Topic: Particles fly off to huge trajectories - any ideas?
Replies: 4
Views: 2666

Particles fly off to huge trajectories - any ideas?

Hello everyone, I've been running some runs where I externally drive a bunch using EVKICK. Most runs are fine, but sometimes I'll see a run where there is a really big jump in the Y-size. I presume with confidence this is numerical? (No Touschek elements etc; this is just a standard synchrotron latt...