The OPAL Discussion Forum

["Snuverink Jochem (PSI)" <jochem.snuverink AT psi.ch>]

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

------------------------------------

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

------------------------------------