frequency_map around closed orbit

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nadolski
Posts: 22
Joined: 20 Mar 2013, 05:03
Location: Synchrotron SOLEIL, Gif-sur-Yvette, France
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frequency_map around closed orbit

Post by nadolski » 05 Dec 2021, 09:20

Dear All,

I would like to use frequency_map to compute the horizontal amplitude versus the energy offset.
Per default the particule not launched with respect to the chromatic orbit as explained in the doc.

&frequency_map
output = %s.fmadp,
xmin = 10e-6,
xmin = 10e-6,
xmax = 0.02,
delta_min = -0.06,
delta_max = 0.06,
nx = 101,
ny = 1,
ndelta = 201,
include_changes = 1 ! compute diffusion
&end

Is there an option to center the particle around the dispersive closed orbit ?

Best regards,

Laurent.

michael_borland
Posts: 1795
Joined: 19 May 2008, 09:33
Location: Argonne National Laboratory
Contact:

Re: frequency_map around closed orbit

Post by michael_borland » 08 Dec 2021, 16:20

Laurent,

If I understand correctly, you want to perform FMA but with the particles x positions offset by the momentum-dependent closed orbit. There's no way to do that with the frequency_map command, but it can be done with scripts. The tracking is still done with Pelegant, so the performance is comparable to using the frequency_map command.

See the attached files for an example.

--Michael
Attachments
fmaExample.zip
(5.04 KiB) Downloaded 93 times

nadolski
Posts: 22
Joined: 20 Mar 2013, 05:03
Location: Synchrotron SOLEIL, Gif-sur-Yvette, France
Contact:

Re: frequency_map around closed orbit

Post by nadolski » 09 Jan 2022, 17:52

Thanks, this is really helping.
Being guided helps a lot to learn ELEGANT and SDDS routines.

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