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[Opal] Electric field map in BANDRF cyclotron


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  • From: Dirk Vandeplassche <dirkvdpla AT skynet.be>
  • To: "opal AT lists.psi.ch" <Opal AT lists.psi.ch>
  • Cc: opal-developers AT lists.psi.ch
  • Subject: [Opal] Electric field map in BANDRF cyclotron
  • Date: Mon, 16 Jun 2025 13:05:08 +0200
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Dear all,

It would really be very helpful for me to obtain a detailed description of the ASCII-version of the electric field map to be used in a BANDRF-type cyclotron. I am especially interested in the header of this file, hoping that it may solve the error in OPAL "Couldn't determine type of fieldmap in file “efield.h5part””. The conversion from the ASCII file to the binary file with the “ascii2h5block” tool seems to work well — anyway it does not give any error message and returns a correct number of data with a header like

0

101

101

61

0.0005 0.0005 0.0001

-0.025 -0.025 -0.003 502.1066965 342.215468 -1294.568941

…

Its output is

Combine efield2.txt and  to efield2.h5part

Frequency 7.2615e+07 [Hz]

H5block grid

H5gridPx 101

H5gridPy 101

H5gridPz 61

number Edata 622261

gridPx 101 stepEx 0.0005

gridPy 101 stepEy 0.0005

gridPz 61 stepEz 0.0001

number Bdata 0

Done bye ...


Any hint that may solve the problem is welcome !

Many thanks in advance,
Dirk Vandeplassche


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