[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

# [FEMM] Loading external data + Discrete magnets

- To: femm@list.foster-miller.net
- Subject: [FEMM] Loading external data + Discrete magnets
- From: Steffen Jankuhn/IOM <jankuhn@uni-leipzig.de>
- Date: Mon, 10 May 2004 20:16:31 +0200 (MEST)
- List-archive: <http://femm.foster-miller.net/pipermail/femm>
- List-help: <mailto:femm-request@list.foster-miller.net?subject=help>
- List-id: FEMM mailing list <femm.list.foster-miller.net>
- List-post: <mailto:femm@list.foster-miller.net>
- List-subscribe: <http://femm.foster-miller.net/mailman/listinfo/femm>, <mailto:femm-request@list.foster-miller.net?subject=subscribe>
- List-unsubscribe: <http://femm.foster-miller.net/mailman/listinfo/femm>, <mailto:femm-request@list.foster-miller.net?subject=unsubscribe>
- Reply-to: FEMM mailing list <femm@list.foster-miller.net>

    Dear FEMM group,

    first of all, I would like to thank Dr. David Meeker for
    his excellent programme.

    We are using FEMM in order to simulate the magnetic field
    applied in our ion sources (see e.g.
    http://www.iom-leipzig.de/muehlleithen/2004/jankuhn_04.pdf
    ). The cylindrical permanent magnets (AlNiCo, NdFeB) are
    arranged around a cylindrical tube - a typical case for a
    spherical, axisymmetrical approximation. An approximation
    of the 0th order, because we have discrete magnets and not
    a ring magnet.
    How is B scaled in this case (with the number of magnetons
    or, simple, with the volume or ...)?

    Now we have measured the real magnetic field and we would
    like to compare the measured and the simulated field. Or
    better, finding the factor which fits the simulated
    ring magnet to the discrete magnets arrangement. For a
    better presentation, I would like to load the measured
    data into FEMM.
    Is this possible now?
    Or would it be a suggestion for the future?
    No problem, to load the B-data of the simulation and the
    measurement into, e.g., Microcal Origin. But, how can I
    (make visible)/calculate the magnetic field LINES - an
    useful measure of the magnetic field STRENGTH - in such
    a programme?

    Thank you for your help.

    Best regards,
    Steffen Jankuhn.

- Follow-Ups:
  - Re: [FEMM] Loading external data + Discrete magnets
    - From: David Meeker <dmeeker@ieee.org>

- Prev by Date: RE: [FEMM] Unexpected inductances values!
- Next by Date: [FEMM] Max. Flux density in Silicon Steel
- Previous by thread: RE: [FEMM] Unexpected inductances values!
- Next by thread: Re: [FEMM] Loading external data + Discrete magnets
- Index(es):
  - Date
  - Thread