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Re: [Opal] OPAL MAP [nosign]

From: "Snuverink Jochem (PSI)" <jochem.snuverink AT psi.ch>
To: "opal AT lists.psi.ch" <opal AT lists.psi.ch>, "Taubert, Sebastian" <taubert AT uni-mainz.de>
Subject: Re: [Opal] OPAL MAP [nosign]
Date: Fri, 15 Jan 2021 13:37:23 +0000
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Hi Sebastian

Yes, you could do optics matching with OPAL-MAP. Note however, that OPAL-MAP is not widely tested and has limited functionality.

The theory, implementation and functionality is well described in the thesis of Philippe Ganz: https://gitlab.psi.ch/OPAL/src/-/wikis/Reports/thesisGanz.pdf

Is it necessary to specify drifts and give them NSLICES? Up to now drifts only exist implicitly, not as elements.

Yes, I believe it is necessary to specify drifts explicitly.

It is written that OPAL-MAP can handle SBENDs. Does it handle turned up/down dipoles via PSI as well ("vertical dipoles")? Do E1 and E2 pose problems to OPAL-MAP?

E1 and E2 are taken into account. I believe PSI is not (but this should be easy to verify). If you have an beamline that only goes up/down then you could change the x/y axes. An example of this is the Gantry 2 regression test:

https://gitlab.psi.ch/OPAL/regression-tests/-/tree/master/RegressionTests/MAP-Gantry2

Hope that helps,

Jochem

From: opal-request AT lists.psi.ch <opal-request AT lists.psi.ch> on behalf of Taubert, Sebastian <taubert AT uni-mainz.de>
Sent: Thursday, January 14, 2021 9:59:59 AM
To: opal AT lists.psi.ch
Subject: [Opal] OPAL MAP

Hi,

Im trying to do some optics matching with OPAL-MAP. But unfortunately OPAL-MAP seems to have some problem with my line. Therefore a few questions:

Is it necessary to specify drifts and give them NSLICES? Up to now drifts only exist implicitly, not as elements.
It is written that OPAL-MAP can handle SBENDs. Does it handle turned up/down dipoles via PSI as well ("vertical dipoles")? Do E1 and E2 pose problems to OPAL-MAP?

Is OPAL-MAP actually the correct choice for doing optics matching? The imported elegant/MAD-X files are not properly matched in OPAL. I guess that lies in the fundamentally different ways to integrate (base t vs base s etc.). So I need to re-match everything once importet to OPAL.

Cheers,

Sebastian

Doctoral Student

Accelerator Physics

Institut für Kernphysik
Johannes Gutenberg-Universität Mainz
Johann-Joachim-Becher-Weg 45
D - 55128 Mainz

E-Mail: taubert AT uni-mainz.de
Office: Due to Covid-19, temporarily not in office
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[Opal] OPAL MAP, Taubert, Sebastian, 01/14/2021
- Re: [Opal] OPAL MAP [nosign], Snuverink Jochem (PSI), 01/15/2021