Search found 5 matches

by astecjames
12 Apr 2021, 10:20
Forum: Bugs
Topic: IBSCATTER with ILMATRIX gives wrong Horizontal Emittance
Replies: 1
Views: 7932

IBSCATTER with ILMATRIX gives wrong Horizontal Emittance

Hi, I am trying to model a ramping booster using an ILMATRIX + SREFFECT element with IBS effects included via the IBSCATTER element. In all cases I have tried, the horizontal emittance seems to scale, if at all, inversely proportional to the bunch charge. If I track using element-by-element tracking...
by astecjames
02 Oct 2020, 04:18
Forum: Bugs
Topic: Space charge when splitting lattice into files
Replies: 2
Views: 7912

Re: Space charge when splitting lattice into files

Hi, Apologies, but I have fixed my own stupidity here. I was using CSRDRIFTs (since I have a 2-dipole chicane), and the LSC works in the CSRDRIFT after the dipole in the SINGLE lattice case. In the SPLIT lattice, (since there are no dipoles in the POST-DOGLEG.lte) file, CSRDRIFTS do not work in term...
by astecjames
30 Sep 2020, 12:45
Forum: Bugs
Topic: Space charge when splitting lattice into files
Replies: 2
Views: 7912

Space charge when splitting lattice into files

Hi, I have a beamline with a compressing dogleg, and some LSC-induced energy spread growth in the line *after* the dogleg, when I am at maximum compression. This is expected. However, if I split my lattice into (say), DOGLEG.lte, POST-DOGLEG.lte etc. and track using the output of the previous lattic...
by astecjames
06 Nov 2015, 07:59
Forum: Bugs
Topic: Issue with EMATRIX and DELTAP
Replies: 3
Views: 4541

Re: Issue with EMATRIX and DELTAP

Michael,

Thanks! That is so obvious, but I completely missed it.
I had translated the deck from a MAD line, which assumes the identity matrix if not told otherwise.

James
by astecjames
05 Nov 2015, 13:18
Forum: Bugs
Topic: Issue with EMATRIX and DELTAP
Replies: 3
Views: 4541

Issue with EMATRIX and DELTAP

Hello! I am trying to simulate off energy particle tracking through an undulator beam-line, where the undulator is implemented as a matrix (the nominal design is for a helical undulator). I need to obtain the trajectory at various momenta, so I use the centroid file and vary an initial MALIGN elemen...