The OPAL Discussion Forum

[Chris Rogers <chris.rogers AT stfc.ac.uk>]

I have been looking at multipoles (with a student), but using an 
analytical formula for the field expansion rather than a field map. Sorry!

Best wishes,
Chris

On 24/02/2020 13:48, Snuverink Jochem (PSI) wrote:
> Dear Simon,
>
> Unfortunately, the hung mailing list problem seems to happen from time 
> to time with the ETH mailing lists.
>
> To answer your question: it is currently not possible to have a fieldmap 
> for a quadrupole. Apart from the common attributes a QUADRUPOLE has only 
> the attributes, K1, DK1, K1S and DK1S. I am sorry the example is a bug 
> in the manual, we’ll correct it.
>
> Perhaps someone (Chris, Christof?) knows a workaround?
>
> Best regards,
>
> Jochem
>
> *From:*opal-request AT lists.psi.ch <opal-request AT lists.psi.ch> *On Behalf 
> Of *Simon Friederich
> *Sent:* Montag, 24. Februar 2020 14:16
> *To:* opal AT lists.psi.ch
> *Subject:* Re: [Opal] OPAL 3DMagnetostatic
>
> Dear all,
>
> Seems to be the mailing list was hung. Please ignore all mails from me 
> but the one attached (OPAL 3DMagnetostatic).
>
> Sorry about that!
>
> Best regards,
>
> Simon
>
> ------------------------------------
>
> Dr. Simon Friederich
>
> Helmholtz-Institut Mainz
>
> Kollaboration B / ACID
>
> Johannes Gutenberg-Universität Mainz
>
> Staudingerweg 18
>
> 55128 Mainz, Deutschland
>
>   
>
> Tel.: +49 (0)6131 39-23160
>
> E-Mail:s.friederich AT uni-mainz.de  <mailto:s.friederich AT uni-mainz.de>
>
> ------------------------------------
>
> Am 23.02.2020 um 15:05 schrieb Simon Friederich:
>
>     Dear all,
>
>     Can someone please explain how 3DMagnetostatic fields can be
>     implemented
>     (by the way can they be implemented in OPAL-t yet?).
>
>     E.g. I have this fieldmap of a quadrupole:
>
>     cst2opal_quad_1Ax_xyz_rough.t7
>
>     # Origin: cst_quad_1Ax_xyz_rough
>     # x,y,z in cm
>     # Bx,By,Bz in T
>     3DMagnetoStatic
>     -1.500 1.500 60
>     -1.500 1.500 60
>     -10.000 10.000 400
>     -2.56903e-05 3.9909599999999996e-07 1.26009e-05
>     -2.61039e-05 4.04632e-07 1.27818e-05
>     ....
>
>     I tried using
>     QP1: Quadrupole, L=0.05, ELEMEDGE=0.5,
>           FMAPFN="cst2opal_quad_1Ax_xyz_rough.t7", K1=0.1;
>
>     But despite the example entry in the wiki
>     (https://gitlab.psi.ch/OPAL/manual-master/wikis/elements) the
>     quadrupole-element does not have a FMAPFN attribute.
>
>     Thank you very much in advance.
>
>     Best regards,
>     Simon
>
>     -- 
>
>     ------------------------------------
>
>     Dr. Simon Friederich
>
>     Helmholtz-Institut Mainz
>
>     Kollaboration B / ACID
>
>     Johannes Gutenberg-Universität Mainz
>
>     Staudingerweg 18
>
>     55128 Mainz, Deutschland
>
>       
>
>     Tel.: +49 (0)6131 39-23160
>
>     E-Mail:s.friederich AT uni-mainz.de  <mailto:s.friederich AT uni-mainz.de>
>
>     ------------------------------------


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