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Re: [Opal] Size of Dipoles

Chronological Thread 
  • From: Christof Metzger-Kraus <christof.j.kraus AT>
  • To: "Thomas, Sebastian" <sthomas AT>
  • Cc: "opal AT" <opal AT>
  • Subject: Re: [Opal] Size of Dipoles
  • Date: Tue, 2 Jun 2020 12:07:06 +0200
  • Authentication-results: localhost; iprev=pass ( smtp.remote-ip=; spf=pass; dkim=pass header.s=20161025 header.a=rsa-sha256; dmarc=pass

Hi Sebastian,

do you know the parameter HAPERT? With it you can define the width of the magnet.


On Tue, Jun 2, 2020 at 11:57 AM Thomas, Sebastian <sthomas AT> wrote:


Quick question: Is there a way to manually define the size (i.e. width) of a dipole and its field? As I understand it, the size of the dipole is defined by the bend angle, the length and the Designenergy. Which makes perfectly sense.

But in my case right now I want to put three dipoles in succession to build a chicane for injection into an ERL. It looks like the picture attached.


Now, when I define the dipoles with the higher energy of the recirculating beam, the fields get way to wide and mess with the Injection line (coming from the right). When I define the dipoles with the energy of the injection, they are small enough, but I also have to change the angle and thus my beamline gets messed up. Thus, my question about manually resizing the dipoles.

I hope, I was able to make myself somewhat clear. Thanks for reading this and maybe answering!



  • [Opal] Size of Dipoles, Thomas, Sebastian, 06/02/2020
    • Re: [Opal] Size of Dipoles, Christof Metzger-Kraus, 06/02/2020

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