The OPAL Discussion Forum

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

Hi Huiwen,
Thanks for keeping on trying! I opened an issue

https://gitlab.psi.ch/OPAL/src/issues/274

where we can track progress on getting your lattice file going.

Cheers,
Chris

On 06/01/2019 13:03, Huiwen Koay wrote:
> Dear Andreas and Chris,
>
> Hi. After referring to some sources and checking through possible errors
> from my previous input, the same problem still persist. I really run out of
> idea which part is going wrong right now.
>
> Hereby I attached with the latest input file and the fieldmap for your
> reference. I really look forward to any suggestion to solve this.
> I sincerely appreciate your great help.
>
> Thank you very much.
>
> Best regards,
> Huiwen
>
>
> On Sat, Jan 5, 2019 at 6:39 PM Adelmann Andreas (PSI) <
> andreas.adelmann AT psi.ch> wrote:
>
> > Dear Huiwen yes at the moment we are doing maintenance.
> >
> > @Chris: you correct me, but I think to remember that you are not free
> > in defining the fast changing dimension when writing the field map. If so
> > this could maybe be the problem?
> >
> >
> > Cheers Andreas
> >
> >
> > ------
> > Dr. sc. math. Andreas (Andy) Adelmann
> > Head a.i. Labor for Scientific Computing and Modelling
> > Paul Scherrer Institut OHSA/D17 CH-5232 Villigen PSI
> > Phone Office: xx41 56 310 42 33 Fax: xx41 56 310 31 91
> > Phone Home: xx41 62 891 91 44
> > -------------------------------------------------------
> > Friday: ETH HPK G 28   +41 44 633 3076
> > ============================================
> > The more exotic, the more abstract the knowledge,
> > the more profound will be its consequences.
> > Leon Lederman
> > ============================================
> >
> > On 5 Jan 2019, at 10:32, Huiwen Koay <koay AT rcnp.osaka-u.ac.jp> wrote:
> >
> > Dear Chris,
> >
> > Please find attached with the fieldmap from tosca. (I updated the latest
> > fieldmap)
> > For your information, gitlab.psi.ch/OPAL is currently running very slow
> > here. Not sure if the site is having maintenance or upgrade.
> > But I think I should have seen most of the SBEND3D examples given in the
> > OPAL/wiki, none of them reflects my current problem.
> >
> > "This error turns up when OPAL can't turn the field map into a regular
> > grid. It can occur, for example, because of rounding errors when converting
> > to a polar coordinate system (so the grid spacing looks irregular)."
> > In this case, do you have any suggestion to solve this problem?
> >
> > Thank you very much.
> >
> > Best regards,
> > Huiwen
> >
> >
> > On Sat, Jan 5, 2019 at 1:26 AM Adelmann Andreas (PSI) <
> > andreas.adelmann AT psi.ch> wrote:
> >
> > > Hi Chris and Huiwen
> > >
> > > maybe the fast changing column in the field map is the wrong one.
> > > I guess the manual is not consistent with that.
> > >
> > > @Chris: the update I send you hopefully fix that.
> > >
> > > Cheers Andreas
> > > ------
> > > Dr. sc. math. Andreas (Andy) Adelmann
> > > Head a.i. Labor for Scientific Computing and Modelling
> > > Paul Scherrer Institut OHSA/D17 CH-5232 Villigen PSI
> > > Phone Office: xx41 56 310 42 33 Fax: xx41 56 310 31 91
> > > Phone Home: xx41 62 891 91 44
> > > -------------------------------------------------------
> > > Friday: ETH HPK G 28   +41 44 633 3076
> > > ============================================
> > > The more exotic, the more abstract the knowledge,
> > > the more profound will be its consequences.
> > > Leon Lederman
> > > ============================================
> > >
> > > On 2 Jan 2019, at 11:30, Chris Rogers <chris.rogers AT stfc.ac.uk> wrote:
> > >
> > > Hi Huiwen,
> > > This error turns up when OPAL can't turn the field map into a regular
> > > grid. It can occur, for example, because of rounding errors when converting
> > > to a polar coordinate system (so the grid spacing looks irregular).
> > >
> > > Could you please send me a copy of the field map file if it isn't too big
> > > (or put in on a drop box/equivalent if it is huge).
> > >
> > > In case you didn't spot it, I would also like to draw your attention to
> > > the SBEND3D-based example lattice here:
> > >
> > > https://gitlab.psi.ch/OPAL/src/wikis/FFA#tracking-through-an-3d-field-map
> > >
> > > Regards,
> > > Chris
> > >
> > > On 02/01/2019 08:20, Adelmann Andreas (PSI) wrote:
> > >
> > > to me this looks like a unit problem. what are the units of your
> > > field map?
> > > cheers A
> > > ------
> > > Dr. sc. math. Andreas (Andy) Adelmann
> > > Head a.i. Labor for Scientific Computing and Modelling
> > > Paul Scherrer Institut OHSA/D17 CH-5232 Villigen PSI
> > > Phone Office: xx41 56 310 42 33 Fax: xx41 56 310 31 91
> > > Phone Home: xx41 62 891 91 44
> > > -------------------------------------------------------
> > > Friday: ETH HPK G 28   +41 44 633 3076
> > > ============================================
> > > The more exotic, the more abstract the knowledge,
> > > the more profound will be its consequences.
> > > Leon Lederman
> > > ============================================
> > > On 2 Jan 2019, at 04:10, Huiwen Koay <koay AT rcnp.osaka-u.ac.jp<
> > > mailto:koay AT rcnp.osaka-u.ac.jp <koay AT rcnp.osaka-u.ac.jp>>> wrote:
> > > Dear Andreas,
> > > This is the error appeared in my shell.
> > > <image.png>
> > > Thank you again.
> > > Best regards,
> > > Huiwen
> > > On Wed, Jan 2, 2019 at 5:41 AM Adelmann Andreas (PSI) <
> > > andreas.adelmann AT psi.ch<mailto:andreas.adelmann AT psi.ch
> > > <andreas.adelmann AT psi.ch>>> wrote:
> > > Hi Huiwen please add also the std-output so we see how OPAL
> > > read your field map file.
> > > Thanks Andreas
> > > ------
> > > Dr. sc. math. Andreas (Andy) Adelmann
> > > Head a.i. Labor for Scientific Computing and Modelling
> > > Paul Scherrer Institut OHSA/D17 CH-5232 Villigen PSI
> > > Phone Office: xx41 56 310 42 33 Fax: xx41 56 310 31 91
> > > Phone Home: xx41 62 891 91 44
> > > -------------------------------------------------------
> > > Friday: ETH HPK G 28   +41 44 633 3076
> > > ============================================
> > > The more exotic, the more abstract the knowledge,
> > > the more profound will be its consequences.
> > > Leon Lederman
> > > ============================================
> > > On 31 Dec 2018, at 09:48, Snuverink Jochem (PSI) <jochem.snuverink AT psi.ch
> > > <mailto:jochem.snuverink AT psi.ch <jochem.snuverink AT psi.ch>>> wrote:
> > > Hi Huiwen,
> > > I am forwarding your question to the OPAL mailing list. Can you add your
> > > input file?
> > > Best regards,
> > > Jochem
> > > Begin forwarded message:
> > > From: Huiwen Koay <koay AT rcnp.osaka-u.ac.jp<mailto:koay AT rcnp.osaka-u.ac.jp
> > > <koay AT rcnp.osaka-u.ac.jp>>>
> > > Subject: Fieldmap error using OPAL-CYCL
> > > Date: 30 December 2018 14:07:24 CET
> > > To: <jochem.snuverink AT psi.ch<mailto:jochem.snuverink AT psi.ch
> > > <jochem.snuverink AT psi.ch>>>
> > > Dear  Jochem Snuverink,
> > > Hi.
> > > I am a new phd in beam physics trying to use OPAL for my AVF-cyclotron
> > > design.
> > > I did my magnetic field study using OPERA3D, and would like to
> > > investigate the AEO and tune results. However, when I try to execute the
> > > input with parameters set using ringdefinition and sbend3d to read in the
> > > fmap file, I received error message as follow:
> > > Error> *** User error detected by function
> > > "SectorMagneticFieldMap::IO::getInterpolator"
> > > Error>     Ran out of field points during read operation; check bounds
> > > and ordering
> > > It seems like the data size expected from the TOSCA file is different
> > > from the real input. According to the manual, we do not have to input
> > > anything else than the length and flux unit, so I thought the grid size of
> > > the input is defined as given by the header of the tosca output file.
> > > However, my prediction seem to be wrong.
> > > Although I can convert the fmap format into other type, but this is the
> > > most convenient way. I would greatly appreciate if you have any suggestions
> > > to solve this problem.
> > > Your soon reply is greatly appreciated.
> > > Thank you very much.
> > > Best regards,
> > > Huiwen
> > >
> > >
> > >
> > > --
> > > ISIS Intense Beams Group
> > >
> > > tel: +44 (0)1235 44 6983
> > >
> > > Building R2,
> > > Rutherford Appleton Laboratory,
> > > Harwell Science and Innovation Campus,
> > > Didcot.
> > > OX11 0QX
> > >
> > >
> > > <Bfield.dat>


--
ISIS Intense Beams Group

tel: +44 (0)1235 44 6983

Building R2,
Rutherford Appleton Laboratory,
Harwell Science and Innovation Campus,
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OX11 0QX