Search found 54 matches

by marlibgin
22 Sep 2015, 05:14
Forum: Parallel Elegant
Topic: Injection Efficiency with pelegant
Replies: 4
Views: 12062

Re: Injection Efficiency with pelegant

Hi Michael it took me some time to check the actual settings and do some tests: A) This are the files I use in my calculation, INJEFF.tar.gz . B) the plot I have posted, with the dramatic change in Inj. Eff. after 1630 turns was indeed produced with an old Pelegant version: 25.2.2 Just to give an id...
by marlibgin
21 Sep 2015, 04:17
Forum: Parallel Elegant
Topic: Injection Efficiency with pelegant
Replies: 4
Views: 12062

Injection Efficiency with pelegant

Hi everyone, to speed up the calculation of injection efficiency in Diamond I am using pelegant . I have done a "crash" test with a large number of turns (6000) and 1000 paricles, to determine the minimum number of turns to define this parameter. The puzzling result is that while (plain) elegant sho...
by marlibgin
10 Jul 2015, 09:44
Forum: Momentum Aperture
Topic: TouschekLifetime: machine vs model
Replies: 11
Views: 23046

Re: TouschekLifetime: machine vs model

I am getting better with the comparison model / machine, having introduced random + multipole errors, corrected orbit, coupling etc I am off by 20 to 30 % at different RF voltages. I still need to create a calibrated model though. Having said that I have realized that when I measure the LT in the ma...
by marlibgin
29 Jun 2015, 12:11
Forum: Momentum Aperture
Topic: TouschekLifetime: machine vs model
Replies: 11
Views: 23046

Re: TouschekLifetime: machine vs model

Nice, thanks very much I will try it asap Another thing, related to the implementation of the LOCO calibrated model. I need to change something like 248 quadrupoles, what's the most effficient way to do it? I am trying renaming the single quads in the .lte file and then using a -macro inline input b...
by marlibgin
29 Jun 2015, 08:53
Forum: Momentum Aperture
Topic: TouschekLifetime: machine vs model
Replies: 11
Views: 23046

Re: TouschekLifetime: machine vs model

Naive question on the use of name patterns with wildcards and my epic fails on the subject. in momentum_aperture include_name_pattern allow to select a wide set of elements, in my case I want to select all the sextupoles in the machine so include_name_pattern = TS*, does the job, all the sextupoles ...
by marlibgin
24 Jun 2015, 10:11
Forum: Momentum Aperture
Topic: TouschekLifetime: machine vs model
Replies: 11
Views: 23046

Re: TouschekLifetime: machine vs model

Thanks I will replace those QUAD asap, I recall why I had introduced this. When I introduce errors on magnets (KQUAD) I involve the skew quad as well, but I fail to correct the orbit. I am not sure how to exclude the QSKEWs from the error assignment, I can suggest the following &error_element elemen...
by marlibgin
24 Jun 2015, 09:29
Forum: Momentum Aperture
Topic: TouschekLifetime: machine vs model
Replies: 11
Views: 23046

Re: TouschekLifetime: machine vs model

Thanks Michael I agree that the ultimate action should be a LOCO calibrated lattice, but this should just trim the result. My case is outrageously wrong, so I first need to tackle something more macroscopic I believe. I have ensured that tune, chro, coupling are in decent agreement with reality. mag...
by marlibgin
24 Jun 2015, 08:00
Forum: Momentum Aperture
Topic: TouschekLifetime: machine vs model
Replies: 11
Views: 23046

TouschekLifetime: machine vs model

This is a general question on how to use touschekLifetime in order to have a good match between machine and model. I am using touschekLifetime after running momentum_aperture to calculate the lifetime of my machine. The goal is trying to reproduce a real configuration of our storage ring (Diamond). ...
by marlibgin
03 Jun 2015, 18:31
Forum: Optimization and Matching
Topic: error on optimization
Replies: 7
Views: 5255

Re: error on optimization

Thanks a lot Michael! it was really useful and it' s running now My final goal is computing the lifetime in a machine where I have introduced several effects (misalignment errors, gradient errors etc), corrected the orbit, tune, chromaticity, introduced a defined coupling (which is the reason of thi...
by marlibgin
02 Jun 2015, 04:39
Forum: Optimization and Matching
Topic: error on optimization
Replies: 7
Views: 5255

Re: error on optimization

thanks Michael I have followed your advice, put the marker, and tried to evaluate the s11,s12 etc. terms at that point. However MRK#1.s11 is not found, while for example MRK#1.s12 is. I have seen that moments_output saves s1 rather than s11, so I have tried to see if I can access that term unsuccess...