Rdt energy high order correction - #1123
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Dear all, who could review this PR ? |
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As an example, I leave here below the values tested before (in red) and after (in green) the implementation of the high order correction for the hmba lattice in this repo. |
swhite2401
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Aug 18, 2026
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Ok for me, I trust you on that one!
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Dear all,
this PR updates the
at.RDTType.CHROMATIC2rdts linear wrt octupoles.Expanding the energy dependence of components$b_2$ from quadrupoles and $b_3$ from sextupoles, as $(1+\delta)^{-1} = 1 - \delta + \delta^2$ , sextupoles will contribute to "chromatic2" rdts with a factor $-\delta$ , and quadrupoles with a factor $+\delta^2$ .
Typically it is a minor correction.
Additionally, rdts dependent on dispersion and focusing terms$h11000$ and $h00110$ , $h10001$ , $h00002$ and $h00003$ , have been added to the list of rdts.