Search found 1930 matches

by michael_borland
19 Sep 2023, 15:00
Forum: Ring Tracking
Topic: Transient beam loading with passive Harmonic cavity
Replies: 7
Views: 5007

Re: Transient beam loading with passive Harmonic cavity

Pradeep,

Please see the attached file for an example.

--Michael
by michael_borland
19 Sep 2023, 12:31
Forum: Installation
Topic: beam current ramping
Replies: 4
Views: 876

Re: beam current ramping

Chao, The recirculation element is to allow setup steps to take place prior to multi-turn tracking in a ring. The original inspiration was to allow tracking through a transport line and injection elements, followed by multi-turn tracking. Although the feature is kept for backward compatibility, it i...
by michael_borland
14 Sep 2023, 14:54
Forum: Installation
Topic: beam current ramping
Replies: 4
Views: 876

Re: beam current ramping

Chao,

The problem is that your CHARGE element is downstream of a recirculation element (RC). So the beam only sees the CHARGE element on the first pass through the beamline. I don't think you need the recirculation element.

--Michael
by michael_borland
14 Sep 2023, 14:36
Forum: General
Topic: field mapping by BMAPXY
Replies: 7
Views: 1505

Re: field mapping by BMAPXY

The problem is that our .csv file is corrupted. For example, look at lines 90 -0.01,-0.0018,-0.954122751767E-,01 -0.528339391746,, , 20007, -0.0001,2.22E-05,0.136713633070E-,02 -0.400245530917E-,, , and 20108 #VALUE!,#VALUE!,-0.528596975,0.388798795444E-,, and many others like them. Unfortunately, t...
by michael_borland
13 Sep 2023, 17:12
Forum: Bugs
Topic: Version 2023.3 released
Replies: 0
Views: 1913

Version 2023.3 released

Version 2023.3 has been released, including bug fixes, feature improvements, and significant performance improvements. Details are in the manual.

--Michael
by michael_borland
13 Sep 2023, 17:11
Forum: General
Topic: Version 2023.3 released
Replies: 0
Views: 2023

Version 2023.3 released

Version 2023.3 has been released, including bug fixes, feature improvements, and significant performance improvements. Details are in the manual.

--Michael
by michael_borland
05 Sep 2023, 18:18
Forum: Ring Tracking
Topic: Ring tracking with ciwggler element
Replies: 6
Views: 1158

Re: Ring tracking with ciwggler element

Weijie, Thanks for posting this problem. It was interesting to analyze. (See attached for details.) I see two issues with the design. First, with only one rf cavity in the ring, the optics is badly distorted by the strong energy variation introduced by the wigglers; I addressed this by putting an rf...
by michael_borland
29 Aug 2023, 09:54
Forum: General
Topic: Read off the one-turn matrix from the result files?
Replies: 1
Views: 963

Re: Read off the one-turn matrix from the result files?

Gunn, There are two ways to get this. You can supply a filename for the final output in the run_setup command. You'll find the Rij values in parameters in that output file. This is convenient if you are varying something in the system and want to see how the matrix elements change as a function of t...
by michael_borland
28 Aug 2023, 12:47
Forum: Momentum Aperture
Topic: Touschek lifetime calculation in presence of magnet errors in a ring
Replies: 2
Views: 652

Re: Touschek lifetime calculation in presence of magnet errors in a ring

Monika, You can use the sddssplit command to split the multi-page output files into many single-page files. Pairs of single-page files can then be fed to touschekLifetime. Once done running touschekLifetime, you can use sddscombine to combine the touschek lifetime results into a single file, which i...
by michael_borland
28 Aug 2023, 12:43
Forum: Ring Tracking
Topic: simulation speed when there are multi-bunches and muti-IBS element
Replies: 3
Views: 776

Re: simulation speed when there are multi-bunches and muti-IBS element

Chao,

I wonder if in the case using bunch duplication you are setting the use_bunched_mode flag?

I would expect using N bunches to slow things down, because there is N times as much interprocess communication (assuming that IBS is a dominant factor in the simulation).

--Michael