Elegant users forum

Dear Michael,

I tried with twice values with Elegant and I got the same chromaticity as yours. but our storage ring is operating at the chromaticity of 6 and 7 with sextupole gradients of 10.98 and -16.57.

I do appreciate all of your answers in this issue,
samira

Dear Michael,

Here is my lattice with the affect of fringe field.
I do appreciate if you can take a look to my files.

Best regards,
Samira

Dear Michael,

I checked with accelerator toolbox and chromaticity must be +6 and+7. but as you mentioned chromaticity values given by elegant is -4.6.
Do you know the reason?

Many thanks for your answer,
Samira

Dear Michael,

Concerning my previous post, first I wanted to be sure that I didn't have a mistake.
Then If my run was correct , what can I do to increase dynamic aperture?

Many thanks and best regards,
Samira

Dear soliday, I did copy and paste in computeBeats file, then I run it. I get this message: no such variable (read trace on "env(HOST_ARCH)") invoked from within "linsert $auto_path 0 /usr/local/oag/apps/lib/$env(HOST_ARCH)" invoked from within "set auto_path [linsert $auto_path 0 /usr/local/oag/app...

Dear Michael, Concerning my question about beta beat computing, still I couldn't get any result. May I ask you kindly to give me some hint? I run ./computeBeats -reference perfectLattice.twi -input perturbedLattice.twi but I get this message: can't read "0": no such variable while executing "exec oa...

Dear Michael, I inserted a wiggler in my ring and after optimization the beam optics, I checked dynamic aperture. Dynamic aperture before insertion a wiggler was 0.2 horizontally and 0.04 vertically while it was decreased to 0.04 horizontally and 0.008 vertically. Do you think if I had a mistake to ...

Dear,

I run "file computeBeats" and I grt :computeBeats: POSIX shell script, ASCII text executable.

Then I run oagtclsh computeBeats and I get:
can't read "0": no such variable
while executing
"exec oagtclsh "$0" "$@""
(file "computeBeats" line 4)

Cheers,
Samira

Dear Michael, Many thanks for your kind reply. I insert two wiggler in my lattice and I tried to do optimization. But still I have beta beating. Could you please to take a look to my files? FYI:First I run nominal.ele and I get twiss parameters. Then I run optimize.ele and I get optimize.new. Finall...

Dear Michael,

I run this script but I got this message:

can't read "0": no such variable
while executing
"exec oagtclsh "$0" "$@""
(file "./computeBeats" line 4)

Cheers,
Samira