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Re: [Opal] Enge Coefficients

Chronological Thread 
  • From: Andreas Adelmann <andreas.adelmann AT>
  • To: Opal AT
  • Subject: Re: [Opal] Enge Coefficients
  • Date: Wed, 28 Sep 2011 15:07:00 +0200
  • List-archive: <>
  • List-id: The OPAL Discussion Forum <>

Hi Chris,
> From Ch. Mayes (posted by AA )
> How crucial is it for SBEND elements in OPAL-T to have a FMAPFN that
> contains the Enge coefficients? As it stands, OPAL won't run without this
> file.
> What I am asking, is if some things like the gap and the field integral can
> be specified in-line with the element definition, instead of requiring a
> file.

This is currently not available in OPAL-T.

> Also, if nothing is specified, what is wrong with having a hard-edged
> magnet?

I do not know what's happen if you set the Enge coefficients to mimic a
hard-edge magnet,
however I can imagine that maybe the CSR or integration routine having


Dr. sc. math. Andreas (Andy) Adelmann
Staff Scientist
Paul Scherrer Institut WLGB/132 CH-5232 Villigen PSI
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