Can't access to sij at fitpoint markers

[dpe]

I'm making a match based on the beam size and I'd like to access to the quantity s11 (alias sigma_x) of a marker. I defined the beam before the &optimize command.
Unlikely I keep getting :

Code: Select all

unknown token: MID_INJ#1.s11

At the moment I'm using this workaround:

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MID_INJ#1.betaxBeam emittance_x * sqrt

Anybody experienced the same? Am I missing something?

Thank you!

[michael_borland]

For sii, i=1...6, equivalent data is supplied as Sx, Sxp, Sy, Syp, Ss, and Sdelta. I see that the manual doesn't say this, however. I'll correct that in the next release.

--Michael

[dpe]

Yes, I was misled by the manual...

Thank you.

[dpe]

Just a note as I spent a lot of time wondering why:

Code: Select all

MARK#1.Sx

was giving a much smaller value than:

Code: Select all

MARK#1.betax emittance_x * sqrt

This was happening because of the default cuts at 2 sigmas and the low number of particles (1000) that I was using. Increasing the cuts the first value converged to the second